This standard specifies various bevel forms and bevel dimensions of steel welded joints. This standard applies to carbon steel and low alloy steel welded joints welded by gas welding (for thin plates), manual arc welding and gas shielded welding.
GB/T 985-1988 history
2008GB/T 985.1-2008 Recommended joint preparation for gas welding,manual metal arc welding,gas-shield arc welding and beam welding
1988GB/T 985-1988 Basic forms and sizes of weld grooves for gas welding manual arc welding and gas--Shielded arc welding