... 4.Certificate:ISO9001:2008 1. ANSI Stainless Steel F304L Forged Flange 2. Material:Stainless Steel:such as 201, 301 ,304, ... .J ,R.J ,MALE ,FEMALE and so on . 8. Used for : petroleum,chemical,power,gas,water,linepipe, heat exchanger,shipbuilding,construction ... by quality and development by credibility. ANSI Stainless Steel F304L Forged Flange