Regarding the strength tests, airtightness tests, and leakage tests for chemical pipelines?
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If asked: 1. Are all three of the above tests required during construction acceptance? 2. If all of them are needed, is there any order? 3. It seems that airtightness and leakiness are the same thing. Is that so? Both GB 50235 \"Code for Construction and Acceptance of Industrial Metal Piping Projects\" and HG 20225 \"Code for Construction and Acceptance of Chemical Industry Metal Piping Projects\" only mention pressure tests (including pneumatic, hydraulic, and leakage tests). Where are the regulations regarding strength tests and airtightness tests? I would appreciate any further advice from everyone.
This post was last edited by su*ubin on 2010-4-12 at 18:58. A strength test is essentially a hydrostatic test; airtightness and leakiness are not exactly the same thing. Airtightness tests are usually conducted under pressure, and they are necessary when dealing with toxic or flammable substances. The test pressure corresponds to the design pressure. Does a leakiness test also include vacuum tests? It is covered in both GB50235 and GB50316.
Strength testing refers to hydrostatic or pneumatic testing, with the test pressures being 1.5 times and 1.15 times the design pressure respectively; hydrostatic testing is preferred, while pneumatic testing can be used in special cases. I’m not very clear about the concepts of airtightness and leakage testing as well, and there are some contradictory statements on forums – please someone knowledgeable explain this!
Airtightness and leakage tests should be the same concept, using gas as the testing medium to check for leaks
I think a gas-tightness test is the same as a leak test, but *is there also a tightness test? What is that?
First, the pipes should be purged, followed by a leak test (using nitrogen or compressed air); after any leaks are eliminated, a strength test is conducted.