JB/T 6062-1992 Weld penetration inspection method and classification of defective magnetic marks JB/T6062-1992 Standard download a

This standard specifies the magnetic particle inspection methods for weld surface defects and near-surface defects and the classif

Replaced by JB/T 6056-2005 JB/T 6056-1992 Stamping Workshop Environmental Protection Guidelines JB/T6056-1992 Standard download an

This standard specifies the basic principles and requirements, general provisions and methods for environmental protection in forg

JB/T 6054-2001 This standard is a revision of JB/T 6054-1992 "Principles for Process Preparation of Cold Extruded Parts". There ar

This standard replaces JB 83-79. JB/T 83-1994 Flat welded ring plate type loose sleeve steel pipe flange JB/T83-1994 Standard down

This standard specifies the types and dimensions of ring-connected face-welded steel pipe flanges with nominal pressures PN of 6.3

This standard replaces JB 79-82. This standard specifies the types and dimensions of tongue-and-groove face-welded steel pipe flan