... ASTM, DIN,JIS,BS standard 4Carbon steel and stainless steel 5Pipes pipe fittings & flanges Carbon Steel & Stainless Steel Flanges according to ASTM, DIN, JIS, ... Socket Welding Flange, Blind Flange, Orifice Flange,Ring Joint Flanges, Long Welding Neck Flange, Figure 8 Blanks Conncetion ... Large tongue & Groove,Small tongue& Groove Materials:Carbon Steel Materials:ASTM A105-ASTM A350 LF2/ASTM A694 F42-F52 ...