... carbon steel flange 1.high pressure 2.high quality and low price 3.size:1/2"-80" 4.certificate:ISO9001:2008,API ASTM ... :free forging,die forging,rolling3) Pressure:150LB-2500LB SIZE:1/2"-80"4) Type:Plate,Slip on,Weld Neck,Blind,Lap Joint ... ,Socket Weld,Threaded,5) Material: Carbon steel:A105,ST37.2,S235JR,Q235,P250GH Stainless steel:F304,F316,316L6) Marking: depends ...