ISO 6761:1981现行
Steel tubes - Preparation of ends of tubes and fittings for welding
出版：International Organization for Standardization
专家解读视频
Gives the most usual preparation for welding, gives symbols, tabulates thicknesses together with designation, symbols, forms of ends, and dimension (degrees and root face width).
NBN EN 253:2003 - Identical
UNI ISO 6761:1982 - Identical
NFE 29 032:1985 - Similar
PN ISO 6761:1996 - Identical
UNI ISO 6761 : 1982 - Identical
NFE 29 032 : 1985 - Similar to
PN ISO 6761 : 1996 - Identical
PN ISO 6761 : 1996 - Identical
UNI ISO 6761 : 1982 - Identical
NFE 29 032 : 1985 - Similar to
