Patent ID: 7628429
Filing Date: 2009-12-08
Classification: F16L

Abstract:
1. A termination fitting for connection to a double containment system including coaxially arranged inner and outer pipes, wherein the inner pipe is made of a first material and the outer pipe is made of a second material and the first material is unweldable with the second material, the first material and the second material being dissimilar materials, the termination fitting comprising: an inner segment of pipe made of said first material and having at least one open end adapted to be end-to-end butt welded to an end of the inner pipe of the double containment system; an outer termination cap having an open first end and a threaded open second end, wherein the inner segment of pipe is continuous and extends out of the open ends of the outer termination cap, and the inner segment of pipe and the outer termination cap are coaxial, wherein the termination cap is made of said second material and the open first end is adapted to be end-to-end butt welded to an end of the outer pipe of the double containment system; a sealing collar having an inner surface secured in a fluid-tight manner to an outer sidewall of the inner segment of pipe, and an outer threaded surface threaded within the threaded open second end of the outer termination cap to provide a fluid-tight seal between the second end of the outer termination cap and the inner segment of pipe; and an o-ring received on the outer threaded surface of the sealing collar within the interior of the termination cap and adjoining the threaded open second end of the termination cap.