法兰连接(接头) flanged joint
对焊连接(接头) butt welded joint
螺纹连接,管螺纹连接 threaded joint, pipe threaded joint
活接头 articulation; union swivel; union
活接头螺母 union nut
活接头螺栓 swing bolt
锥管螺纹密封焊连接 seal-welded
taper pipe threaded joint
承插焊连接(接头) socket welded joint
承插连接(接头) bell and spigot joint
活接联接器 joint coupling
活接三通 union tee
活接头套管 union thimble