Airtightness test of the equipment
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After the factory shuts down for maintenance, it is necessary to conduct a gas-tightness test on the equipment and pipelines as well as replace the air with nitrogen. What are the standards for this gas-tightness test? Is it related to the design pressure of the corresponding equipment?
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In practice, air-tightness testing is done by using soapy water to check for leaks, right?
1) All inspection areas were checked with soapy water to ensure no leaks； (2) System pressure drop after 12 hours of pressure holding