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U.S. Bellows, Inc. Designed and Fabricated Expansion Joints that Required Helium Leak Testing (PT&P Ref #87658) 10/04/2006

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Single Expansion Joint going through a Helium Leak Test
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 Condition:
176 PSIG at 500°F
0.5 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




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