Louisiana Administrative Code › Title 51 - PUBLIC HEALTH-SANITARY CODE › Part XIV - Plumbing › Chapter 3 - General Regulations › Section XIV-313 - Types of Joints

Current through Register Vol. 50, No. 6, June 20, 2024
A.
				Tightness. Joints and connections in the plumbing system shall be gastight and
				watertight for the pressure required by test, with the exceptions of those
				portions of perforated or open-joint piping which are installed for the purpose
				of collecting and conveying ground or seepage water to the underground storm
				drains.
B. Threaded Joints.
				Threaded joints shall conform to ASME B 1.20.1. All burrs shall be removed,
				pipe ends shall be reamed or filed out to size of bore, and all chips shall be
				removed. Pipe-joint cement and sealing compound shall be used only on male
				threads and be insoluble and nontoxic. All pipe-joint sealants for use on
				potable water piping shall be listed and labeled by an approved testing
				laboratory.
C. Wiped Joints. Joints
				in lead pipe or fittings, or between lead pipe or fittings and brass or copper
				pipe, ferrules, solder nipples, or traps, shall be full-wiped joints. Wiped
				joints shall have an exposed surface on each side of a joint not less than
				3/4-inch (19.1 mm) and at least as thick as the material being jointed. Wall or
				floor flange lead-wiped joints shall be made by using a lead ring or flange
				placed behind the joints at wall or floor. Joints between lead pipe and cast
				iron or steel shall be formed by means of a caulking ferrule, soldering nipple,
				or bushing.
D. Flexible Couplings.
				Flexible couplings may be used to join plain ends of similar or dissimilar
				pipes and the flexible coupling shall consist of an approved gasket that is
				attached to the pipe with special adjustable stainless steel clamps and bolts
				(see §711. D of this code). The flexible couplings and the approved gasket
				shall be oil resistant.
E. Precast
				Joints. Precast collars shall be formed on the spigot and in the bell of the
				pipe in advance of use. Materials shall be resistant to acids, alkalies and
				oils, and precast joints shall conform to the requirements of ASTM C 425, and
				upon installation shall be tested as provided in this code.
F. Cement Mortar Joints and Connections. The
				following applies to cement mortar joints and connections.
1. Except for repairs and connections to
				existing lines constructed with such joints, cement mortar joints are
				prohibited.
2. Where permitted,
				cement mortar joints shall be made in the following manner: A layer of jute or
				hemp shall be inserted into the base of the annular joint space and packed
				tightly to prevent mortar from entering the interior of the pipe or fitting.
				Not more than 25 percent of the annular space shall be used for jute or hemp.
				The remaining space shall be filled in one continuous operation with a
				thoroughly mixed mortar composed of one part cement and two parts sand, with
				only sufficient water to make the mixture workable by hand. Additional mortar
				of the same composition shall then be applied to form a one to one slope with
				the barrel of the pipe. The bell or hub of the pipe shall be swabbed to remove
				any mortar or other material which may have found its way into such
				pipe.