Straight seam steel pipe water pressure how to calculate Kunlian steel pipe
The steel pipe shall be tested hydraulically one by one. The test pressure shall be calculated according to formula (2), but the maximum pressure shall not exceed 10 MPa and the time for regulating the voltage shall not be less than 5 s. The leakage of the pipe wall shall not occur at this time. P=2RS/D (2) Where: P—test pressure, MPa; R—stress, take 50% of yield point, MPa; S—nominal wall thickness of steel pipe, mm; D—nominal of steel pipe Outside diameter, mm. The supplier can use an eddy current inspection instead of a hydraulic test, and the qualification level should meet Class A in GB/T 7735-1995.
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