The standards of seamless stainless steel pipes in various countries are as follows:

1. Chemical analysis: chemical analysis of the chemical composition of the material, which conforms to the standard

2. Air pressure. Hydraulic test for pressure pipe for pressure test, which shall not be kept for less than 5 seconds and leakage in specified pressure value. The normal supply hydraulic pressure test is 2.45mpa. The pressure test is p=0.5mpa

3. Corrosion test: the industrial corrosion-resistant steel pipes provided shall be tested for corrosion resistance according to the standard or the corrosion methods agreed by both parties, and there shall be no intergranular corrosion tendency

4. Technical performance testing: flattening test, tensile test, impact test, expanding test, hardness test, metallographic test, bending test

Tests - non destructive testing (including eddy current testing - X-ray and ultrasonic testing)

5. Steel pipe implementation standard:

Steel pipe in China: gb/t14975-2002.gb/t14976-2002.gb13296-91.gb9948-88

GB5310-95.GB2270-80

American steel pipe: ASTM a213/a213-99a.astn312/a312m-00b.astm a269-00.astma511-96

Japanese steel pipe: jis3463.jis3446.jis3448.jis3459

German steel pipe: din2462

6. Theoretical weight of steel pipe:..

Cr Ni austenitic stainless steel w=0.02491s (D-S)..

Cr Ni Mo austenitic stainless steel (kg/m) s-wall thickness (mm)..

D-outer diameter (mm)

Solemnly declare: This stainless steel information article is collected and reprinted on the Internet, which does not represent the view of Changzhou Zhihao metal products Co., Ltd., and we are unable to verify and be responsible for its authenticity.