... flange, stainless steel flange,alloy steel flange 2) standard ASME,ANSI,API,JIS, 3) OD 1/2"-48 ... steel flange, stainless steel flange,alloy steel flange2) standard ASME,ANSI,API,JIS,3) OD 1/2"-48 ... equipments have reached the international and domestic advanced standard.The test items include X-ray defect detection ... ,spectrum testing and infrared control etc. DIN standard forged carbon steel flange