Cracks have been found in the flange and web splices at groove welds in at least four Bridges.
至少在四座桥梁的翼缘板和腹板拼接坡口焊缝中发现了裂纹。
2
When male and female (M&F) or tongue and groove (T&G) type flanges are specified, the nozzle flange facing of the vessel shall be of female or groove type.
如指定使用外螺纹及内螺纹或榫面及槽面法兰，容器设备口法兰端面应为凹槽型。
3
The flange pipe of the high diameter groove is a new type of steel pipe connection, also known as the clip connection, there are many advantages.