Do medium and high-pressure equipment containing hydrogen need to undergo air tightness testing?
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For example, if the medium is a mixed gas containing hydrogen, and the separation equipment has medium pressure or high pressure, is it necessary to conduct an air tightness test? Is it related to the small molecules of hydrogen?
Do as much as you can. If you really don’t do it, forget it.
Article 58 of the "Capacity Regulations" stipulates that "when the toxicity of the medium contained in the container is extremely hazardous or trace leakage is not allowed, the air tightness test requirements of the pressure vessel should be included in the design." GB150 stipulates that "containers whose medium toxicity is extremely or highly hazardous shall undergo an air tightness test after passing the pressure test." Therefore, there is no mandatory requirement for air tightness test for hydrogen medium, and it is recommended to conduct air tightness test. After all, hydrogen is an extremely refractory medium. Its explosion limit bandwidth and lower explosion limit are low, ranging from 4% to 74.2%. Its leakage should be strictly controlled, so air tightness tests are still required to ensure safety during use.
No, Article 58 of the Capacity Regulations stipulates: When the toxicity of the medium contained in the pressure vessel is extremely hazardous or highly hazardous or trace leakage is not allowed, requirements for air tightness testing of the pressure vessel should be put forward during design. For cast pressure vessels with gaseous media, air tightness test requirements should also be stated in the design drawings. Hydrogen is only a flammable and explosive medium, and is obviously not a gas that is "extremely hazardous or highly hazardous or does not allow trace leakage".
There is no need to do this. In an open environment, it does not matter if there is a trace leakage of hydrogen. If it is required that there should be no trace leakage, it must be done. Hydrogen is a small molecule. If it is done, it must be done with hydrogen. Air will not work.
The person above is right. Hydrogen should not be allowed to leak. It should be based on personal feelings.
According to the "Capacity Regulations", air tightness testing is not required.； If the HG/T20584-2011 "Technical Requirements for Manufacturing Steel Chemical Containers" standard is adopted in the design document, and the industry is the chemical industry and must comply with this standard, this must be done. The standard P544 specifies: Containers that meet the following conditions should undergo a leakage test: 1. The medium is explosive. 2. The medium is extremely hazardous or highly hazardous. 3. There are strict requirements for vacuum. 4. . . 5. . .