Expansion Joints that Required Helium Leak Testing
Flange Expansion Joints for a Thermal Power Plant
Expansion Joints that Required Helium Leak Testing
This order required custom engineering to design and manufacture these expansion joints due to their critical service condition requirements. PT&P manufactured and tested these expansion joints to the customer specifications, EJMA Standards and US Bellows Quality Standards.
Design Conditions:
-176 PSIG at 500˚F
-.5 Axial Extension and 1.5 Axial Compression
-18″ 304 Stainless Steel Expansion Joints with Special Designed and Machined Flange Faces with a Specially Designed Gasket Groove
-Special Customer Welding Requirements to A.W.S. Standards
Critical Spring Rate Requirements
-Stringent Testing Requirements: The Bellows Longitudinal Seams were 100% X-Rayed and Dye-Penetrant Examined. Each Expansion Joint was Helium Leak Tested to a Leak Rate of 1 x 10 ֿ 7