This standard applies to stainless steel seamless steel pipes used in boiler superheaters, heat exchangers, condensers, catalytic tubes, etc., Sanitary Valve.

Quoted standard GB 222 Sample sampling method for chemical analysis of steel and allowable deviations of chemical composition of finished products

GB 223. Chemical analysis methods for steel and alloys

GB 228 Metal tensile test method

GB 230 Metal Rockwell hardness test method

GB 231 Metal Brinell hardness test method

GB 241 Metal hydraulic test method

GB 242 Metal pipe expansion test method

GB 246 Metal tube flattening test method

GB 1223 Test method for intergranular corrosion tendency of stainless acid-resistant steel

GB 2102 Acceptance, packaging, marking and quality certificate of steel pipes ♦

GB 3652 High temperature tensile test method for metal pipes

GB 4163 Ultrasonic flaw detection method for stainless steel pipes

GB 4334.1 10% oxalic acid etching test method for stainless steel

GB 4334-2 Sulfuric acid-iron sulfate corrosion test method for stainless steel

GB 4334. 3 Stainless steel 65% nitric acid corrosion test method

GB 4334* 4 Nitric acid-hydrofluoric acid corrosion test method for stainless steel

GB 4334.5 Sulfuric acid-copper sulfate corrosion test method for stainless steel

GB 5777 Ultrasonic flaw detection method for seamless steel pipes t

GB 6394 Method for determination of average grain size of metals

GB 6397 Jinli tensile test specimen

GB 7735 Eddy current flaw detection method for steel pipes