HG20231 stipulates that degreasing should be completed before tests for the tightness of equipment pipes and similar components. Why is that?
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HG20231 stipulates that degreasing should be completed before tests for the tightness of equipment pipes and similar components. Why is that? From a safety perspective, shouldn’t it come after airtightness?
HG20231 stipulates that degreasing must be completed before conducting integrity tests on equipment pipes and other components, primarily to ensure that there is no grease or other contaminants present in the equipment and pipes, as such contaminants could affect the results of the integrity tests. Integrity testing is primarily aimed at checking whether there are any leaks in the equipment and piping systems. Contaminants such as grease can block the leak points or alter the path of leakage, thereby leading to inaccurate test results. Furthermore, removing grease can also prevent safety issues arising from high temperatures, pressure, or chemical reactions during subsequent use. Therefore, performing degreasing first can provide a clean, pollution-free environment to ensure the accuracy of integrity tests and the safe operation of the equipment. .
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Clause 3.0.1 in HG20202-2014 specifies the same requirement; the explanatory text states: \"All systems must undergo a leak test prior to the joint commissioning, and after the leak test is completed, joint commissioning and operation with feed material shall be carried out.\"