ANSI B16.9 Socket Weld Flange, CS, AS, SS, 150-2500LB
BS 4504 Stainless Steel Socket Welding Flange, RF, PN40
ASTM A105, A182 Sock Welded Flange, ASME B16.47, FF
ASTM A105 WCB SW Flange, TG, 1/2-24 Inch, 150LB
JIS Carbon Steel Socket Weld Flange, MFM, 10-40K
DIN Dual Phase Steel Socket Welded Flange, RTJ, PN6-40