All valves to be fitted with a protector conforming to BS EN 12351. – the protector shall fit either over the complete flange or plug into the flange bolt holes, this shall prevent alve being fitted in line without the removal of the flange protector.
this shall prevent alve being fitted in line without the removal of the flange protector 什么意思????
这段话意思是:所有阀门要安装符合 BS EN 12351 标准的保护套 - 保护套应该要么装在整个法兰上,要么插入法兰螺栓孔中,这样可以防止在未拆卸法兰保护套的情况下安装阀门。"this shall prevent alve being fitted in line without the removal of the flange protector" 意思是这样的保护措施可以防止在未拆除法兰保护套的情况下,将阀门安装在管道线路中。