High integrity shutoff gate valves can be used for hot tapping or in pipeline services where a soft pig is used if the seat ring installation lugs are removed 高度完全关闭闸阀可以用在热水龙头，或拆卸阀座环安装吊耳后，用在采用软铁块的管路中。
2.
High integrity shutoff gate valves can be used for hot tapping or in pipeline services where a soft pig is used if the seat ring installation lugs are removed 如果拆卸掉阀座环安装耳柄，则高度整体性关闭闸阀可以用在热水出口或采用软铁的管道系统中。
