2. Before construction, check whether the original pipeline is unblocked, then carry out construction, and then check whether the pipeline is unblocked after construction.
Hidden water supply pipes should be inspected for water supply, and newly installed water supply pipes must be pressurized according to relevant regulations without leakage. Only after passing the inspection can we enter the next working procedure.
Second, the gas pipeline 1, pressure test The pressure test is to use an air compressor to fill the gas pipeline with compressed air, and use the air pressure to test the tightness of the pipeline interface and material.
According to the inspection purpose, it is divided into strength test and air tightness test.
2. Strength test Strength test is to test the compactness of pipe joints (including pipes) with high air pressure. The test pressure depends on the pipeline gas transmission pressure grade and pipeline material. In general, the test pressure is 1 of the design gas transmission pressure.
5 times, but the steel pipe shall not be less than 0.3Mpa, the plastic pipe shall not be less than 0.65438±0 MPa, and the cast iron pipe shall not be less than 0.05Mpa.
3. Air tightness test Air tightness test is to test the tightness of pipes and joints by using air pressure under similar gas transmission conditions.
Therefore, the air tightness test should be carried out after all gas pipelines are installed.
If it is buried, it must be backfilled to 0.5m above the pipe top.