1. In order to maintain pressure gauges for non-Boost surveillance, the external pressure guide tube should be closed before boosting.
2. Flange inserting blind plate for separating system should be tested with working medium at the initial stage of commissioning. Send someone to check when driving.
3. Boosting should be carried out slowly and the airtight pressure should not exceed the rule limit.
4. When relieving pressure, drainage should be carried out by pouring at the low point or dead corner to avoid hydrocele.
5. Air tightness test is not done in atmospheric pressure system.
6. Air tightness experiments need to be classified into appropriate systems according to the pressure levels of equipment and pipelines.
7. The pipeline between the system and the system shall be separated by valves and, if necessary, by blind plates. The pump body shall be separated by blind plates.
8. The pipeline of material inlet and outlet device must also carry out air tightness test.
9. The pipeline of public engineering system may make full use of the medium in the pipeline to carry out air-tightness experiments.
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