This standard specifies the plastic form and dimensions of concave and convex surface welded steel pipes with nominal pressures PN

This standard replaces JB 79-82. This standard specifies the types and dimensions of convex butt welded steel pipe flanges with no

This standard specifies the types and dimensions of steel pipe flanges for convex panel flat lamps with nominal pressures PN of 0.

This standard replaces JB 79-59. JB/T 79.4-1994 Ring connection surface integral cast steel pipe flange JB/T79.4-1994 standard dow

This standard replaces JB 79-59. This standard specifies the types and dimensions of tongue-and-groove integral cast steel pipe fl

This standard replaces JB 79-59. JB/T 79.2-1994 Concave and convex integral cast steel pipe flange JB/T79.2-1994 Standard download

This standard replaces JB 79-59. JB/T 79.1-1994 Raised surface integral cast steel pipe flange JB/T79.1-1994 Standard download and

This standard replaces JB 75-59. This standard applies to pipeline flanges specified in JB/T 79~986. JB/T 75-1994 Pipe flange type