PREPARATION AND TESTING OF A TITANIUM-LINED PIPE SECTION FOR STANDARD RING-JOINT GASKETS

摘要

A 12-inch-long1 steel pipe section (3-inch, schedule 160) in the form of a spool piece having flanges grooved for standard 2500-psi. ring-joint gaskets was fitted with a liner made from welded titanium tube with a l/l6-inch wall and a 2-1/2-inch inside diameter. A satisfactory hot-spinning technique for extending the titanium out over the flanges was developed and is described. - Testing the section with repeated. pressure-temperature cycles to 2,000 psi. and 600°F. demonstrated that a satisfactory leak-tight joint could be obtained with this design. Gaskets of 304 stainless steel gold plated were mechanically satisfactory and permitted repeated reassembly of the test section without damage to the titanium liner.