JB Standard Welding Steel Pipe Flanges

JB/T79.1 -1994 Overall Cast Steel Pipe Flanges (1.6 to 20Mpa, including 6.4); (JB79-59)
The convex JB/T79.1 Overall Cast Steel Pipe Flanges
The Overall Convex Surface of JB/T79.2 Cast Steel Pipe Flanges
The Tenon Slot JB/T79.3 Whole Surface of Steel Pipe Flange
JB/T79.4 Ring Joint Face Overall Steel Pipe Flange
JB/T82.1~JB/T82.4-1994 Welding Steel Pipe Flange; (JB82-59)
The convex JB/T82.1 Welding Steel Pipe Flanges
JB/T82.2 Bump Face Welding Steel Pipe Flanges
JB/T82.3 Tongue and Groove Face Welding Steel Pipe Flanges
Connection JB/T82.4 Central Face Welding Steel Pipe Flanges
JB77-1959 Flange Sealing Surface Type
JB78-1959 Cast Iron Flange
JB79-1959 Cast Steel Flange
JB80-1959 Cast Iron Threaded Flange
JB82-1959 Welded Steel Flange


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