Gate valves should be installed and welded into the pipline with the wedge or disc in the fully closed position 闸阀应该在楔板或阀板处于完全关闭位置时才能安装或焊接到管道中。
2.
Globe valves should be installed and welded with the disc in a fully closed position to prevent damage to the valve during installation 应该在截止阀阀瓣处于完全关闭状态下进行安装和焊接，以避免在安装过程中队阀门造成损坏。
