... 10mm-3000mm. 1.GRADE:ASTM A182-301,F302,F304/L,F316/L,F321/H,F51,EN10272,1.4301,1.4306,1 ... .(PL)Plate-type Flat Welding Flange.(SO)Slip-on Neck Flange.(WN)Butt Welding Neck Flange.(SW) Socket Welding Flange.( ... 2''-115''PNPN0.25-50MpaGRADEASTM A182-F301,F302,F304/L,F316/L,F321/H,F51;EN10272,1.4301,1.4306,1 ... end steel Butt-welding fittings elbow and bent pipe socket welding fittings threaded fittings