Pipe Expansion Joint Product Testing
U.S. Bellows, Inc. does extensive physical testing ranging from X-Ray tests and Hydrotests to Helium Leak tests (using a mass spectrometer.) Each bellows and pipe expansion joint unit goes through in-process quality control using a system of travelers. Final in-house inspection and testing are performed prior to shipping. Our manufacturing shop also has ASME Section VIII CODE certification.
Fatigue Testing (also known as Cycle Testing)
Fatigue testing is essentially verifying how many cycles a bellows can withstand before failing. The bellows is placed on the “cycle-test machine” and bolted to a hydraulic plunger. Each cycle is counted as the bellows is compressed and returned to neutral.
View a Fatigue Test Verifying a Cycle Life of 30,000 (VIDEO)
The objective of the burst test is to determine the ultimate pressure resistance, primarily conducted on bellows. Normally, hydraulic pressure is slowly increased until failure occurs. Pressure balanced pipe expansion joints are designed to maintain a constant volume through the use of a compensating bellows.
Hydrostatic Testing (also known as Hydro-testing)
Additional Product Testing:
- Ultrasonic Testing
- Radiography Testing
- PMI Testing
- Pneumatic Testing
- Magnet Particle Testing