US Bellows: Dye Test

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Expansion Joint Product Testing: Dye Penetration Testing

Objective: The objective of this test is to check for leakage or cracks in the Bellows attachment welds. This test is used for long seam welds before and after forming.

What we do: Spray liquid dye on the bellows and detect the dye seeping into the defect. The dye is applied evenly on the surface to be tested. A time for penetration of the dye chemical inside the defect is allowed and then the dye on the surface is cleaned. A white powder observant is applied on the surface which performs a blotting action.

After Completion: An indication of the dye with the white background characterizes the surface discontinuities on the bellows. The indication is then interpreted and evaluated.


Liquid dye is sprayed	Leaks are detected

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U.S. Bellows, Inc. Designed and Fabricated 50 Universal Expansion Joints for an Air Force Base in New Mexico (Ref#91376-A1, EA) 11/14/2007
U.S. Bellows, Inc. fabricated 50 expansion joints from 304L stainless steel. The expansion joints were 6" and 8" sizes. The 6" expansion joints are 24" face to face and the 8" expansion joints are 26" face to face. All of the expansion joints are fabricated with liners that are also made with 304L stainless steel. The design temperature was 200°F and the design pressure was 200 PSIG. The expansion joints were dye-penetrant tested and hydro tested at 300 PSIG. U.S. Bellows, Inc. provides 100% customer satisfaction in terms of quality and delivery.