... 600,900,1500,25005. Size:1/2"-40"6. Type:Slip-on flanges, Blind flanges, Lap joint flanges, Welding ... FF ,RF, LJ, FM ,R.T.J and so on .10. Production process : raw material--cutting--heating--forging-- ... 10-15 .17. Inspection :in-house and the third party.18. Used for : petroleum,chemical,power,gas,water, ... from our new and old customers whose do business with us .we are sincerely to establish long - ...