筒形丝锥 meaning in English

shell tap

The thread of any shell tapping shall be selected from and be in accordance with table5
任何筒形丝锥的螺纹应该从表5中选择，且符合表5的要求。
Provision of shell tappings for auxiliary connections is not required unless specified by the purchaser
除非买方指定，制造商无需提供辅助连接件用的筒形丝锥。
If a means of sealing the shell tapping is provided , it shall be suitable for the full pressure / temperature rating of the valve
如果提供了用于密封筒形丝锥的工具，这个工序必须适用于阀门所有压力/温度等级。