Patent Description:
Dual containment fitting assemblies are designed to connect threaded and non-threaded tubing to secondary components, such as other tubing or valve assemblies. The use of such assemblies can facilitate connections of concentric inner and outer plastic tubes in an arrangement such that the outer tubing contains any leakage of fluid from the inner tubing. Although such dual fitting assemblies reduces the problem of leakage from the inner tubing itself, in view of the aggressive nature of the caustic chemicals and process conditions that are used in the semiconductor manufacturing industry, it is desirable that additional containment options be developed for possible leakage around the connection between the tubing and the secondary components. It is therefore desirable that improved fitting assemblies continue to be developed in order to provide additional leakage protection around the intersections between the tubing and the secondary components.

<CIT> describes a double-pipe joint. In the double-pipe joint for connecting and coupling a double pipe consisting of outer and inner pipes made of a <NUM> fluororesin tube, an inner joint portion for coupling the inner pipe is formed by: a sleeve which is to be pressingly fitted into an inner-pipe end portion; an inner-pipe joint body which is to be fitted onto the end portion; and an inner-pipe union nut. An outer joint portion for coupling the outer pipe is formed by: a sleeve which is to be pressingly fitted into an outer-pipe end portion; an outer-pipe joint body which is to be fitted onto the end portion; and an <NUM> outer-pipe union nut. The inner-pipe union nut and the outer-pipe joint body are formed integrally into a nut-equipped body.

<CIT> relates to elastic fluid turbine plants, more particularly to arrangements for supplying oil or like Inflammable substance under pressure to hydraulic motors, bearings or other elements forming part of or associated with elastic fluid turbines.

The objects of the present invention are solved by the features of the independent claim. Any "aspect", "example" <NUM> and "embodiment" of the description not falling within the scope of the claims does not form part of the invention and is provided for illustrative purposes only.

The invention in a first aspect comprises a dual containment fitting assembly as defined in claim <NUM>. Further aspects are defined in the dependent claims.

Embodiments are illustrated by way of example and are not limited to the accompanying figures.

Skilled artisans appreciate that elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale.

The following discussion will focus on specific implementations and embodiments of the teachings. The detailed description is provided to assist in describing certain embodiments and should not be interpreted as a limitation on the scope or applicability of the disclosure or teachings. It will be appreciated that other embodiments can be used based on the disclosure and teachings as provided herein.

Embodiments described herein are generally directed to a dual containment fitting for connecting tubing or a tubing type component to a valve assembly or to another tubing type component. The dual containment fitting is configured such that the connection includes leak containment spaces surrounding a primary tubing and the intersection between the tubing component and the valve assembly or the additional tubing component. According to certain embodiments, the dual containment fitting that may include a primary tubing, a secondary tubing, and a dual containment body. According to still other embodiment, the combination of the dual containment fitting connected to the valve assemble or the additional tubing component may be referred to as a dual containment fitting assembly.

These concepts are better understood in view of the embodiments described below that illustrate and do not limit the scope of the present disclosure.

<FIG> includes an illustration of a perspective view of a dual containment fitting assembly <NUM> that may include a dual containment fitting <NUM> connected to a valve assembly <NUM>.

<FIG> includes an illustration of the dual containment fitting <NUM> connected to a valve assembly <NUM>. According to particular embodiments, and as shown in <FIG>, the dual containment fitting <NUM> may include a primary tubing <NUM>, a secondary tubing <NUM>, and a dual containment body <NUM>. The primary tubing <NUM> may include a flared end <NUM>, a first portion <NUM> and a second portion <NUM>. The secondary tubing <NUM> may include a flared end <NUM>.

As also shown in <FIG>, according to certain embodiments, the secondary tubing <NUM> may surround the first portion <NUM> of the primary tubing <NUM>. According to still other embodiments, the secondary tubing <NUM> may be concentric with the first portion <NUM> of the primary tubing <NUM>. According to yet other embodiments, the secondary tubing <NUM> may form a first leak containment space <NUM> between the first portion <NUM> of the primary tubing <NUM> and the secondary tubing <NUM>.

As further shown in <FIG>, the dual containment body <NUM> may include a flare fitting portion <NUM>, a primary containment nut portion <NUM> and a bore therethrough.

According to certain embodiments, the flare fitting portion <NUM> may surround the second portion <NUM> of the primary tubing <NUM>. According to yet other embodiments, the flare fitting portion <NUM> may be concentric with the second portion <NUM> of the primary tubing <NUM>. According to yet other embodiment, the flare fitting portion <NUM> second leak containment space <NUM> between the second portion <NUM> of the primary tubing <NUM> and the flare fitting portion <NUM> of the dual containment body <NUM>. According to still other embodiments, the flare fitting portion <NUM> of the dual containment body <NUM> may compressively engage with the flared end <NUM> of the secondary tubing <NUM> connecting the first leak containment space <NUM> with the second leak containment space <NUM>.

According to yet other embodiments, the primary containment nut portion <NUM> may surround the flared end <NUM> of the primary tubing <NUM>. According to still other embodiments, the primary containment nut portion <NUM> may be concentric with the flared end <NUM> of the primary tubing <NUM>. According to still other embodiments, the primary containment nut portion <NUM> may form a third leak containment space <NUM> between the flared end <NUM> of the primary tubing <NUM> and the primary containment nut portion <NUM> of the dual containment body <NUM>.

According to yet other embodiments, the primary containment nut portion <NUM> may include at least one leak passage hole <NUM> connecting the third leak containment space <NUM> with the second leak containment space <NUM>.

As further shown in <FIG>, the deal containment fitting <NUM> may further include a secondary containment nut <NUM>. According to certain embodiments, the secondary containment nut <NUM> may surround the flared end <NUM> of the secondary tubing <NUM>. According to yet other embodiments, the secondary containment nut <NUM> may be concentric with the flared end <NUM> of the secondary tubing <NUM>. According to still other embodiments, the secondary containment nut <NUM> may threadably engage with the flare fitting portion <NUM> of the dual containment body <NUM>. According to yet other embodiments, the secondary containment nut <NUM> may compressively engage the flared end <NUM> of the secondary tubing <NUM> with the flare fitting portion <NUM> of the dual containment body130.

<FIG> includes an illustration of an alternative view of the primary containment nut portion <NUM> of the dual containment body <NUM> of the dual containment fitting <NUM> illustrated in <FIG>. <FIG> further illustrates the leak passage hoes <NUM> through the primary containment nut portion <NUM>.

<FIG> includes an illustration of dual containment body <NUM>. As shown in <FIG>, the dual containment body <NUM> may include a flare fitting portion <NUM>, a primary containment nut portion <NUM> and a bore therethrough as illustrated in <FIG>.

According to certain embodiments, the primary tubing <NUM> may include a particular material. According to still other embodiments, the primary tubing <NUM> may include a polymer material. According to yet other embodiments, the primary tubing <NUM> may consist essentially of a polymer material. According to other embodiments, the polymer material of the primary tubing <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the polymer material of the primary tubing <NUM> may consist essentially of perfluoroalkoxy (PFA). According to still other embodiments, the primary tubing <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the primary tubing <NUM> may consist essentially of perfluoroalkoxy (PFA).

According to still other embodiments, the primary tubing <NUM> may include an outer wall. According to yet other embodiments, the outer wall of the primary tubing <NUM> may have a particular thickness. For example, the outer wall of the primary tubing <NUM> may have a thickness of at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the outer wall of the primary tubing <NUM> may have a thickness of not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the thickness of the outer wall of the primary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the thickness of the outer wall of the primary tubing <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the primary tubing <NUM> may have a particular average inner diameter. For example, the average inner diameter of the primary tubing <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to yet other embodiments, the average inner diameter of the primary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM>. It will be appreciated that the average inner diameter of the outer wall of the primary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the inner diameter of the outer wall of the primary tubing <NUM> may be any value between any of the values noted above.

According to still other embodiments, the primary tubing <NUM> may have a particular average outer diameter. For example, the average outer diameter of the primary tubing <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to yet other embodiments, the average outer diameter of the primary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the average outer diameter of the outer wall of the primary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the outer diameter of the outer wall of the primary tubing <NUM> may be any value between any of the values noted above.

According to certain embodiments, the flared end <NUM> of the primary tubing <NUM> may include a particular material. According to still other embodiments, the flared end <NUM> of the primary tubing <NUM> may include a polymer material. According to yet other embodiments, the flared end <NUM> of the primary tubing <NUM> may consist essentially of a polymer material. According to other embodiments, the polymer material of the flared end <NUM> of the primary tubing <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the polymer material of the flared end <NUM> of the primary tubing <NUM> may consist essentially of perfluoroalkoxy (PFA). According to still other embodiments, the flared end <NUM> of the primary tubing <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the flared end <NUM> of the primary tubing <NUM> may consist essentially of perfluoroalkoxy (PFA).

According to still other embodiments, the flared end <NUM> of the primary tubing <NUM> may include an outer wall. According to yet other embodiments, the outer wall of the flared end <NUM> of the primary tubing <NUM> may have a particular thickness. For example, the outer wall of the flared end <NUM> of the primary tubing <NUM> may have a thickness of at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the outer wall of the flared end <NUM> of the primary tubing <NUM> may have a thickness of not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the thickness of the outer wall of the flared end <NUM> of the primary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the thickness of the outer wall of the flared end <NUM> of the primary tubing <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the flared end <NUM> of the primary tubing <NUM> may have a particular maximum inner diameter. For example, the maximum inner diameter of the flared end <NUM> of the primary tubing <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the maximum inner diameter of the flared end <NUM> of the primary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM>. It will be appreciated that the maximum inner diameter of the flared end <NUM> of the primary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the maximum inner diameter of the flared end <NUM> of the primary tubing <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the flared end <NUM> of the primary tubing <NUM> may have a particular minimum inner diameter. For example, the minimum inner diameter of the flared end <NUM> of the primary tubing <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the minimum inner diameter of the flared end <NUM> of the primary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM>. It will be appreciated that the minimum inner diameter of the flared end <NUM> of the primary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the minimum inner diameter of the flared end <NUM> of the primary tubing <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the flared end <NUM> of the primary tubing <NUM> may have a particular maximum outer diameter. For example, the maximum outer diameter of the flared end <NUM> of the primary tubing <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the maximum outer diameter of the flared end <NUM> of the primary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM>. It will be appreciated that the maximum outer diameter of the flared end <NUM> of the primary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the maximum outer diameter of the flared end <NUM> of the primary tubing <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the flared end <NUM> of the primary tubing <NUM> may have a particular minimum outer diameter. For example, the minimum outer diameter of the flared end <NUM> of the primary tubing <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the minimum outer diameter of the flared end <NUM> of the primary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM>. It will be appreciated that the minimum outer diameter of the flared end <NUM> of the primary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the minimum outer diameter of the flared end <NUM> of the primary tubing <NUM> may be any value between any of the values noted above.

According to certain embodiments, the first portion <NUM> of the primary tubing <NUM> may include a particular material. According to still other embodiments, the first portion <NUM> of the primary tubing <NUM> may include a polymer material. According to yet other embodiments, the first portion <NUM> of the primary tubing <NUM> may consist essentially of a polymer material. According to other embodiments, the polymer material of the first portion <NUM> of the primary tubing <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the polymer material of the first portion <NUM> of the primary tubing <NUM> may consist essentially of perfluoroalkoxy (PFA). According to still other embodiments, the first portion <NUM> of the primary tubing <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the first portion <NUM> of the primary tubing <NUM> may consist essentially of perfluoroalkoxy (PFA).

According to still other embodiments, the first portion <NUM> of the primary tubing <NUM> may include an outer wall. According to yet other embodiments, the outer wall of the first portion <NUM> of the primary tubing <NUM> may have a particular thickness. For example, the outer wall of the first portion <NUM> of the primary tubing <NUM> may have a thickness of at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the outer wall of the first portion <NUM> of the primary tubing <NUM> may have a thickness of not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the thickness of the outer wall of the first portion <NUM> of the primary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the thickness of the outer wall of the first portion <NUM> of the primary tubing <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the first portion <NUM> of the primary tubing <NUM> may have a particular maximum inner diameter. For example, the maximum inner diameter of the first portion <NUM> of the primary tubing <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the maximum inner diameter of the first portion <NUM> of the primary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM>. It will be appreciated that the maximum inner diameter of the first portion <NUM> of the primary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the maximum inner diameter of the first portion <NUM> of the primary tubing <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the first portion <NUM> of the primary tubing <NUM> may have a particular minimum inner diameter. For example, the minimum inner diameter of the first portion <NUM> of the primary tubing <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the minimum inner diameter of the first portion <NUM> of the primary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM>. It will be appreciated that the minimum inner diameter of the first portion <NUM> of the primary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the minimum inner diameter of the first portion <NUM> of the primary tubing <NUM> may be any value between any of the values noted above.

According to certain embodiments, the second portion <NUM> of the primary tubing <NUM> may include a particular material. According to still other embodiments, the second portion <NUM> of the primary tubing <NUM> may include a polymer material. According to yet other embodiments, the second portion <NUM> of the primary tubing <NUM> may consist essentially of a polymer material. According to other embodiments, the polymer material of the second portion <NUM> of the primary tubing <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the polymer material of the second portion <NUM> of the primary tubing <NUM> may consist essentially of perfluoroalkoxy (PFA). According to still other embodiments, the second portion <NUM> of the primary tubing <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the second portion <NUM> of the primary tubing <NUM> may consist essentially of perfluoroalkoxy (PFA).

According to still other embodiments, the second portion <NUM> of the primary tubing <NUM> may include an outer wall. According to yet other embodiments, the outer wall of the second portion <NUM> of the primary tubing <NUM> may have a particular thickness. For example, the outer wall of the second portion <NUM> of the primary tubing <NUM> may have a thickness of at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the outer wall of the second portion <NUM> of the primary tubing <NUM> may have a thickness of not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the thickness of the outer wall of the second portion <NUM> of the primary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the thickness of the outer wall of the second portion <NUM> of the primary tubing <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the second portion <NUM> of the primary tubing <NUM> may have a particular maximum inner diameter. For example, the maximum inner diameter of the second portion <NUM> of the primary tubing <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the maximum inner diameter of the second portion <NUM> of the primary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM>. It will be appreciated that the maximum inner diameter of the second portion <NUM> of the primary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the maximum inner diameter of the second portion <NUM> of the primary tubing <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the second portion <NUM> of the primary tubing <NUM> may have a particular minimum inner diameter. For example, the minimum inner diameter of the second portion <NUM> of the primary tubing <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the minimum inner diameter of the second portion <NUM> of the primary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM>. It will be appreciated that the minimum inner diameter of the second portion <NUM> of the primary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the minimum inner diameter of the second portion <NUM> of the primary tubing <NUM> may be any value between any of the values noted above.

According to certain embodiments, the secondary tubing <NUM> may include a particular material. According to still other embodiments, the secondary tubing <NUM> may include a polymer material. According to yet other embodiments, the secondary tubing <NUM> may consist essentially of a polymer material. According to other embodiments, the polymer material of the secondary tubing <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the polymer material of the secondary tubing <NUM> may consist essentially of perfluoroalkoxy (PFA). According to still other embodiments, the secondary tubing <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the secondary tubing <NUM> may consist essentially of perfluoroalkoxy (PFA).

According to still other embodiments, the secondary tubing <NUM> may include an outer wall. According to yet other embodiments, the outer wall of the secondary tubing <NUM> may have a particular thickness. For example, the outer wall of the secondary tubing <NUM> may have a thickness of at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the outer wall of the secondary tubing <NUM> may have a thickness of not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the thickness of the outer wall of the secondary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the thickness of the outer wall of the secondary tubing <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the secondary tubing <NUM> may have a particular average inner diameter. For example, the average inner diameter of the secondary tubing <NUM> may be at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to yet other embodiments, the average inner diameter of the secondary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM>. It will be appreciated that the average inner diameter of the outer wall of the secondary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the inner diameter of the outer wall of the secondary tubing <NUM> may be any value between any of the values noted above.

According to still other embodiments, the secondary tubing <NUM> may have a particular average outer diameter. For example, the average outer diameter of the secondary tubing <NUM> may be at least about <NUM>, such as, or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to yet other embodiments, the average outer diameter of the secondary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the average outer diameter of the outer wall of the secondary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the outer diameter of the outer wall of the secondary tubing <NUM> may be any value between any of the values noted above.

According to certain embodiments, the flared end <NUM> of the secondary tubing <NUM> may include a particular material. According to still other embodiments, the flared end <NUM> of the secondary tubing <NUM> may include a polymer material. According to yet other embodiments, the flared end <NUM> of the secondary tubing <NUM> may consist essentially of a polymer material. According to other embodiments, the polymer material of the flared end <NUM> of the secondary tubing <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the polymer material of the flared end <NUM> of the secondary tubing <NUM> may consist essentially of perfluoroalkoxy (PFA). According to still other embodiments, the flared end <NUM> of the secondary tubing <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the flared end <NUM> of the secondary tubing <NUM> may consist essentially of perfluoroalkoxy (PFA).

According to still other embodiments, the flared end <NUM> of the secondary tubing <NUM> may include an outer wall. According to yet other embodiments, the outer wall of the flared end <NUM> of the secondary tubing <NUM> may have a particular thickness. For example, the outer wall of the flared end <NUM> of the secondary tubing <NUM> may have a thickness of at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the outer wall of the flared end <NUM> of the secondary tubing <NUM> may have a thickness of not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the thickness of the outer wall of the flared end <NUM> of the secondary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the thickness of the outer wall of the flared end <NUM> of the secondary tubing <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the flared end <NUM> of the secondary tubing <NUM> may have a particular maximum inner diameter. For example, the maximum inner diameter of the flared end <NUM> of the secondary tubing <NUM> may be at least about <NUM>, such as, or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the maximum inner diameter of the flared end <NUM> of the secondary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM>. It will be appreciated that the maximum inner diameter of the flared end <NUM> of the secondary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the maximum inner diameter of the flared end <NUM> of the secondary tubing <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the flared end <NUM> of the secondary tubing <NUM> may have a particular minimum inner diameter. For example, the minimum inner diameter of the flared end <NUM> of the secondary tubing <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the minimum inner diameter of the flared end <NUM> of the secondary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the minimum inner diameter of the flared end <NUM> of the secondary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the minimum inner diameter of the flared end <NUM> of the secondary tubing <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the flared end <NUM> of the secondary tubing <NUM> may have a particular maximum outer diameter. For example, the maximum outer diameter of the flared end <NUM> of the secondary tubing <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the maximum outer diameter of the flared end <NUM> of the secondary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the maximum outer diameter of the flared end <NUM> of the secondary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the maximum outer diameter of the flared end <NUM> of the secondary tubing <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the flared end <NUM> of the secondary tubing <NUM> may have a particular minimum outer diameter. For example, the minimum outer diameter of the flared end <NUM> of the secondary tubing <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the minimum outer diameter of the flared end <NUM> of the secondary tubing <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM>. It will be appreciated that the minimum outer diameter of the flared end <NUM> of the secondary tubing <NUM> may be within a range between any of the values noted above. It will be further appreciated that the minimum outer diameter of the flared end <NUM> of the secondary tubing <NUM> may be any value between any of the values noted above.

According to certain embodiments, the flared fitting portion <NUM> of the dual containment body <NUM> may include a particular material. According to still other embodiments, the flared fitting portion <NUM> of the dual containment body <NUM> may include a polymer material. According to yet other embodiments, the flared fitting portion <NUM> of the dual containment body <NUM> may consist essentially of a polymer material. According to other embodiments, the polymer material of the flared fitting portion <NUM> of the dual containment body <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the polymer material of the flared fitting portion <NUM> of the dual containment body <NUM> may consist essentially of perfluoroalkoxy (PFA). According to still other embodiments, the flared fitting portion <NUM> of the dual containment body <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the flared fitting portion <NUM> of the dual containment body <NUM> may consist essentially of perfluoroalkoxy (PFA).

According to yet other embodiments, the flared fitting portion <NUM> of the dual containment body <NUM> may have a particular average inner diameter. For example, the average inner diameter of the flared fitting portion <NUM> of the dual containment body <NUM> may be an average inner diameter of at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the average inner diameter of the flared fitting portion <NUM> of the dual containment body <NUM> may be not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM>. It will be appreciated that the average inner diameter of the flared fitting portion <NUM> of the dual containment body <NUM> may be within a range between any of the values noted above. It will be further appreciated that the average inner diameter of the flared fitting portion <NUM> of the dual containment body <NUM> may be any value between any of the values noted above.

According to certain embodiments, the primary containment nut potion <NUM> of the dual containment body <NUM> may include a particular material. According to still other embodiments, the primary containment nut potion <NUM> of the dual containment body <NUM> may include a polymer material. According to yet other embodiments, the primary containment nut potion <NUM> of the dual containment body <NUM> may consist essentially of a polymer material. According to other embodiments, the polymer material of the primary containment nut potion <NUM> of the dual containment body <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the polymer material of the primary containment nut potion <NUM> of the dual containment body <NUM> may consist essentially of perfluoroalkoxy (PFA). According to still other embodiments, the primary containment nut potion <NUM> of the dual containment body <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the primary containment nut potion <NUM> of the dual containment body <NUM> may consist essentially of perfluoroalkoxy (PFA).

According to still other embodiments, the primary containment nut potion <NUM> of the dual containment body <NUM> may include an outer wall. According to yet other embodiments, the outer wall of the primary containment nut potion <NUM> of the dual containment body <NUM> may have a particular thickness. For example, the outer wall of the primary containment nut potion <NUM> of the dual containment body <NUM> may have a thickness of at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the outer wall of the primary containment nut potion <NUM> of the dual containment body <NUM> may have a thickness of not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the thickness of the outer wall of the primary containment nut potion <NUM> of the dual containment body <NUM> may be within a range between any of the values noted above. It will be further appreciated that the thickness of the outer wall of the primary containment nut potion <NUM> of the dual containment body <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the primary containment nut potion <NUM> of the dual containment body <NUM> may have a particular average inner diameter. For example, the average inner diameter of the primary containment nut potion <NUM> of the dual containment body <NUM> may be an average inner diameter of at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the average inner diameter of the primary containment nut potion <NUM> of the dual containment body <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the average inner diameter of the primary containment nut potion <NUM> of the dual containment body <NUM> may be within a range between any of the values noted above. It will be further appreciated that the average inner diameter of the primary containment nut potion <NUM> of the dual containment body <NUM> may be any value between any of the values noted above.

According to still other embodiments, the primary containment nut potion <NUM> of the dual containment body <NUM> may have a particular average outer diameter. For example, the average outer diameter of the primary containment nut potion <NUM> of the dual containment body <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to yet other embodiments, the average outer diameter of the primary containment nut potion <NUM> of the dual containment body <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the average outer diameter of the outer wall of the primary containment nut potion <NUM> of the dual containment body <NUM> may be within a range between any of the values noted above. It will be further appreciated that the outer diameter of the outer wall of the primary containment nut potion <NUM> of the dual containment body <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the outer wall of the primary containment nut portion <NUM> of the dual containment body <NUM> may include a particular number of leak passage holes <NUM>. For example, the outer wall of the primary containment nut portion <NUM> of the dual containment body <NUM> may have at least one leak passage hole, such as, at least two leak passage holes or at least three leak passage holes or at least four leak passage holes or at least five leak passage holes or even at least six leak passage holes.

According to still other embodiments, each of the leak passage holes <NUM> may be equally spaced around the outer wall of the primary containment nut portion <NUM> of the dual containment body <NUM>. According to still other embodiments, each of the leak passage holes <NUM> may pass through the outer wall of the primary containment nut portion <NUM> of the dual containment body <NUM>.

According to yet other embodiments, each of the leak passage holes <NUM> may be configured for unidirectional fluid flow. According to still other embodiments, each of the leak passage holes <NUM> may be configured to allow flow from the third leak containment space <NUM> to the second leak containment space <NUM>.

According to yet other embodiments, any of the leak passage holes <NUM> may have a particular inner diameter. For example, the inner diameter of the leak passage holes <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to yet other embodiments, the inner diameter of the leak passage holes <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM>. It will be appreciated that the inner diameter of any of the leak passage holes <NUM> may be within a range between any of the values noted above. It will be further appreciated that the inner diameter of any of the leak passage holes <NUM> may be any value between any of the values noted above.

According to certain embodiments, the secondary containment nut <NUM> may include a particular material. According to still other embodiments, the secondary containment nut <NUM> may include a polymer material. According to yet other embodiments, the secondary containment nut <NUM> may consist essentially of a polymer material. According to other embodiments, the polymer material of the secondary containment nut <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the polymer material of the secondary containment nut <NUM> may consist essentially of perfluoroalkoxy (PFA). According to still other embodiments, the secondary containment nut <NUM> may include perfluoroalkoxy (PFA). According to yet other embodiments, the secondary containment nut <NUM> may consist essentially of perfluoroalkoxy (PFA).

According to still other embodiments, the secondary containment nut <NUM> may include an outer wall. According to yet other embodiments, the outer wall of the secondary containment nut <NUM> may have a particular thickness. For example, the outer wall of the secondary containment nut <NUM> may have a thickness of at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to still other embodiments, the outer wall of the secondary containment nut <NUM> may have a thickness of not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the thickness of the outer wall of the secondary containment nut <NUM> may be within a range between any of the values noted above. It will be further appreciated that the thickness of the outer wall of the secondary containment nut <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the secondary containment nut <NUM> may have a particular inner diameter. For example, the inner diameter of the secondary containment nut <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to yet other embodiments, the inner diameter of the secondary containment nut <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the inner diameter of the secondary containment nut <NUM> may be within a range between any of the values noted above. It will be further appreciated that the inner diameter of the secondary containment nut <NUM> may be any value between any of the values noted above.

According to yet other embodiments, the secondary containment nut <NUM> may have a particular outer diameter. For example, the outer diameter of the secondary containment nut <NUM> may be at least about <NUM>, such as, at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or at least about <NUM> or even at least about <NUM>. According to yet other embodiments, the outer diameter of the secondary containment nut <NUM> may be not greater than about <NUM>, such as, not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or not greater than about <NUM> or even not greater than about <NUM>. It will be appreciated that the outer diameter of the secondary containment nut <NUM> may be within a range between any of the values noted above. It will be further appreciated that the outer diameter of the secondary containment nut <NUM> may be any value between any of the values noted above.

Claim 1:
A dual containment fitting assembly (<NUM>), comprising:
a primary tubing (<NUM>) having a flared end (<NUM>);
a secondary tubing (<NUM>) having a flared end (<NUM>), wherein the secondary tubing (<NUM>) surrounds and is concentric with a first portion (<NUM>) of the primary tubing (<NUM>) forming a first leak containment space (<NUM>) between the primary tubing (<NUM>) and the secondary tubing (<NUM>);
a dual containment body (<NUM>) comprising a flare fitting portion (<NUM>), a primary containment nut portion (<NUM>) and a bore therethrough,
wherein the flare fitting portion (<NUM>) surrounds and is concentric with a second portion (<NUM>) of the primary tubing (<NUM>) forming a second leak containment space (<NUM>) between the primary tubing (<NUM>) and the flare fitting portion (<NUM>),
wherein an end of the flare fitting portion (<NUM>) compressively engages with an inner surface of the flared end (<NUM>) of the secondary tubing (<NUM>) connecting the first leak containment space (<NUM>) with the second leak containment space (<NUM>),
wherein the primary containment nut portion (<NUM>) surrounds and is concentric with the flared end (<NUM>) of the primary tubing (<NUM>) forming a third leak containment space (<NUM>) between the primary tubing (<NUM>) and the primary containment nut portion (<NUM>), and
wherein the primary containment nut portion (<NUM>) comprises at least one leak passage hole (<NUM>) connecting the third leak containment space (<NUM>) with the second leak containment space (<NUM>).