Safety of a firearm

1. remove all flange protection covers and discard all packing materials.
2. check the seat, the surface of the valve seat supporting flange gasket. It must be clean, smooth, scratch free, resistant to corrosion, and tool marks.
3. check the gasket to make sure the material is suitable for use.
4. lubricate all studs and nuts with an appropriate thread lubricant. If the fastener is a high temperature or stainless steel material, reverse seizing compounds such as molybdenum disulfide are used.
5. bolt ring gasket.
6. set the shell of the fire arrestor and the pipe flange to butt joint, and pay attention to the lifting handle of the fire arrester and the position of the top nut, so that the components of the flame arrester can be removed in the future