Product characteristics<br>1. Chemical analysis: chemical analysis shall be carried out for the chemical composition of the material, and the chemical composition shall meet the requirements of the standard.<br>2. Air pressure and water pressure test: the pressure pipe shall be put into the water pressure test one by one, and the specified pressure value shall not be kept for less than 5 seconds without leakage. The normal supply water pressure test is 2.45mpa, and the air pressure test is p = 0.5mpaa.<br>3. Corrosion test: the industrial corrosion-resistant steel pipes supplied shall be tested for corrosion resistance according to the standard provisions or the corrosion method agreed by both parties, and there shall be no tendency of intergranular corrosion.<br>4. Process performance inspection: flattening test, tensile test, impact test, flaring test, hardness test, metallographic test, bending test, NDT (including eddy current test, X-ray test and ultrasonic test).<br>
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