GBT 986-1988 埋弧焊焊缝坡口的基本形式和尺寸

GBT 986-1988 埋弧焊焊缝坡口的基本形式和尺寸
1 The subject content and scope of application
The national standard prescribed the basic forms and sizes of weld grooves for submerged arc weld.
The national standard is suitable for the submerged arc welding welded joint of carbon steel and low alloy steel.
2 Cited standard
GB 324 Symbolic representation method of welded joint on drawings
3. The basic forms and sizes of weld grooves for submerged arc weld should conform to prescription of Table 1.
4 The symbolic representation of welded joint on drawings should conform to prescription of GB/ T 324.
5 So as to obtain full-penetration weld, the welded joint back gouging is allowed.
6 The basic forms and sizes for butt weld grooves of steel plates with different thickness.