Tied Universal Expansion Joint for Pipe Carrying Sulfur Dioxide
This tied universal expansion joint is designed to carry hot gas up to temperatures of 1022ºF and pressure up to 5 PSIG. It has a 66″ inside diameter and is 72″ in overall length. The design movements are 4″ lateral and 4.5″ axial compression. The bellows’ material is Inconel® 825 with carbon steel weld ends. The bellows and pipe longitudinal weld seams were 100% x-rayed prior to a 5 PSIG air test and then dye-penetrant examined after 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
