Abstract: A welding seal assembly for use in joining and sealing two telescoped tubular elements in a lap joint, specifically a tubular pipe in a pipe socket formed in a pipe fitting. The seal assembly comprises a thermoplastic welding sleeve with an embedded electric heating coil for fitting between the pipe and the socket; a mounting collar including a ring-like body that is fitted over the pipe and against the end of the socket element with a thin-walled, compressible flange extending from the body over the outer side of the socket element and overlying the overlapped elements of the joint; an electrical connector in a radially projecting tab on the ring, including electrical contacts connected to the leads of the heating coil; and a clamp ring surrounding the compressible flange and held captive thereon between the tab on the body and detents on the flange.

Abstract: A ball valve having an externally threaded seal carrier, a ball, a seal disposed between the carrier and ball, a tubular valve body internally threaded to engage the external threads of the seal carrier and hold it in the body, an axial clearance between the external and internal threads to permit linear movement of the carrier, a connecting sleeve which contacts the carrier, and a union nut adjustably attached to the valve body and slidably engaging the connecting sleeve for external adjustment of the axial position of the carrier within the body to compensate for seal wear by movement of the sleeve towards the body. The carrier extends beyond the valve body to provide an adjusting space between the connecting sleeve and body to permit movement of the sleeve towards the body.

Abstract: A pipe joint and method of making a pipe joint are disclosed, the pipe joint being suitable for formation on a pipe fitting and a pipe and comprising an enlarged annular socket, a first lip projecting toward the open end of the socket cooperating with a second lip formed on an annular retaining ring to hold an annular seal ring therebetween, the retaining ring being locked in place by deforming the outer end of the pipe member radially inwardly.