CB/T 3212-1999
船用搭焊、对焊、铜管折边松套、异径钢法兰
Lap Welding. Balanced welding. Copper pipe flanging free Flared steel flange for marine
1999-04-30
CB/T 4327-2013
船用对焊钢法兰
The marine butt-welding steel flanges
2013-07-22
CB/T 50-2008
船用对焊钢环松套钢法兰
Marine welding neck steel outer composite flanges
2008-03-17