The steel pipe shall do mechanical performance test, stretch test, bend test, flattening test, guide bending test and hydraulic test, and meet the requirements of the standard. The steel pipe should be able to withstand a certain internal pressure, the maximum test pressure is 5.05Mpa, the maintenance time is not less than 5S, the experimental process, the steel pipe does not appear leakage phenomenon. Resistance welded steel pipes allow ultrasonic detection test or vortex detection test instead of hydraulic testing. Buried arc welded steel pipes allow ultrasonic or ray detection tests to replace hydraulic testing.
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