1, chemical analysis: the chemical composition of the chemical analysis, chemical composition in line with the standard requirements.
2. Air pressure. The pressure test of pressure seamless steel pipe by the pressure test, in the specified pressure value does not keep not less than 5 seconds, not leak, conventional supply water pressure test for 2.45MPa. pressure test for P=0.5MPAa.
3, corrosion test: the industrial corrosion resistant seamless steel pipe is in accordance with the standard or the two sides of the agreement of the corrosion method of seamless steel pipe corrosion resistance test, no intergranular corrosion tendency.
4, process performance test: flattening test. Tensile test. Impact test. Flaring test. Hardness test. Metallographic test. Bending test. Nondestructive testing (including eddy current flaw. X-ray and ultrasonic inspection).
5, the implementation of standards:
China: GB/T14975-2002.GB/T14976-2002.GB13296-91.GB9948-88.GB5310-95.GB2270-80
United States: A213/A213-99a.ASTN312/A312M-00b.ASTM A269-00.ASTMA511-96. ASTM
Japan: JIS3463.JIS3446.JIS3448.JIS3459
Germany: characteristics of DIN2462 seamless steel pipe products.
Source: Zhejiang Yaang Pipe Industry Co., Limited (www.yaang.com)
