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What are the quality tests that are conducted on expansion joints?

At U.S. Bellows, we perform a variety of tests:

  • Burst Testing – 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.
  • Dye Penetration Testing – Liquid dye is used to locate leaks or cracks in the bellows.
  • Hydro Testing – Bellows are pressurized for 30 minutes to locate leaks or cracks. 


    Burst test gauge
    Burst Testing