... size 2. F316, F51,35CrMo, 36CrNiMo4 and so on 3. Heat treatment 4. detailed record cards of process ... 1. A105 Q235 Forged Carbon Steel Flange 2. Material:CS 3. Size:1/2"-48" ... Non standard,4. Size:1/2"-48"5. Type:Slip-on flanges, Blind flanges, Lap joint flanges, Welding neck flanges ... RF, LJ, FM ,RTJ,RJ ,MALE ,FEMALE and so on .8. Used for : petroleum,chemical,power,gas,water,linepipe, ...