A seal load ring having parallel radial faces is installed between the flared gasket portion of the piping plastic liner and the lapped end of a section of metal piping. The plastic engaging face of the ring is provided with a plurality of concentric circular grooves to resist plastic cold flow. The pipe lap has a significantly lesser outside diameter than the outside diameter of the seal load ring, only sufficient to support the joint connecting forces, thereby permitting easier and more economical fabrication of the pipe lap and permitting the use of l...
A lined piping assembly comprising in combination a component of metal piping having a connector portion flared radially outwardly at a predetermined angle to form a pipe lap having a rearwardly facing surface engageable by a pipe flange and having a forward facing surface; a seal load ring having an inside diameter substantially matching that of said connector portion, a first face engaging said forward facing surface of said pipe lap, and a radical face on the side away from said first face; a plastic pipe lining extending out of said connector portion...
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