The following is the mechanical flange standard JB.
Mechanical Department Flange Standard JB
Whether the standard number is applicable or not
JB/T 74-1994 pipe flange technical conditions are currently
JB/T 75-1994 pipe flange type is currently
JB/T 79.1-1994 convex integral cast steel pipe flange is currently
JB/T 79.2-1994 concave and convex surface integral cast steel pipe flange is currently
JB/T 79.3-1994 grooved surface integral cast steel pipe flange is currently
JB/T 79.4-1994 ring joint surface integral cast steel pipe flange
JB/T 82.1-1994 convex facing welded steel pipe flange
JB/T 82.2-1994 concave and convex welded steel pipe flange is currently
JB/T 82.3-1994 gutter facing welded steel pipe flange
JB/T 82.4-1994 ring connection facing welded steel pipe flange
JB/T 83-1994 flat welded ring plate loose steel pipe flange is currently
JB/T 84-1994 concave and convex facing welding ring plate loose steel pipe flange
JB/T 85-1994 Flanged plate loose steel pipe flange is currently
JB/T 86.1-1994 convex steel pipe flange cover is currently
JB/T 86.2-1994 concave and convex steel pipe flange cover is currently
SH 3404-1996 pipe flange fasteners are currently
SH 3406-1996 petrochemical steel pipe flange is currently
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