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These expansion joints were designed at 170 PSIG and 450 degrees F. to absorb lateral movements and tested per B31.3. They were made with Inconel® 625LCF bellows and A105 300 lb. RFSO flanges. The entire assembly was hydro-tested at 255 PSIG and held under pressure for four hours. In order to detect any leaks, each expansion joint and its welds were subjected to the dye penetrant-test and the X-ray test, each of which were 100%, prior to and following forming.

U.S. Bellows, Inc., the expansion joint division of Piping Technology & Products, Inc., designed and fabricated 14″ diameter, tied universal expansion joints for a steam application at a power plant in Illinois. The expansion joints were designed at 350 psig, 780° F and constructed from Inconel® 625 bellows, A105 300# RFSO flanges, A106 GR. B spool, and SA193 B7 tie rods. The expansion joints were hydro-tested at 525 PSIG