Under what circumstances do pressure vessels containing explosive media need to undergo leak testing?
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Under what circumstances do pressure vessels containing explosive media need to undergo leak testing?
At the time of initial commissioning of a new plant, and before the start of major maintenance shutdown of the plant.
Pressure vessels that are not allowed to have any trace leakage must undergo leak tests.
The new standard requires that for containers with a medium toxicity level of extremely hazardous or highly hazardous, or those in which even trace leaks are not permitted, a leakage test be conducted after the pressure resistance test is passed.
It should be media that fall under the category of high hazard, as well as those that are flammable and explosive
Is it related to the density of the explosive medium, for example, whether the density of the medium is greater than or less than that of air? .
Conditions under which a leakage test is required: 1) After passing the pressure resistance test, leakage tests shall be conducted on pressure vessels whose contained medium is extremely or highly toxic, or for which minor leaks are not permitted due to design considerations； 2) It shall be specified in the design drawings whether a pressure vessel required to undergo a pressure test also needs to undergo a leakage test. Depending on the testing medium, leak tests are divided into airtightness tests, as well as ammonia leak detection tests, halogen leak detection tests, and helium leak detection tests.
According to clause 11.3.2 of HG_T20584-2011 \"Technical Requirements for the Manufacturing of Steel Chemical Vessels\", a leakage test shall be conducted on the vessel under the following conditions: 1 When the medium is explosive. 2 When the medium is extremely hazardous or highly hazardous. 3 When strict requirements are imposed on vacuum. 4 If there is a leak, it will threaten the safety of the container (such as the lining) and the operators. 5 When required by the design specifications.