DN1200 waterproof casing 02s404 flexible waterproof casing

Today we mainly introduce several principles to prevent nuts from loosening when installing waterproof casing
How to prevent nuts from loosening when installing waterproof casing. In addition to welding, most pipe fittings are installed with bolts. The same is true for flexible waterproof casing. principle.
Today we mainly introduce several principles to prevent the nut from loosening when installing waterproof casing
Use the strength of the thread to tighten the nut to achieve the anti-loosening effect. For example, after tightening the nut, install a second nut, and use two The strength of the threads between the two nuts makes them symmetrical and exert preload force. This not only saves capital, but also effectively maximizes the elasticity of the gasket inside the pipe fitting.
Use the hole bolt to tighten the nut, and then insert the rivet fixing nut on the hole bolt after tightening. This method must drill holes and drive rivets into the bolt after the nut is tightened. It cannot be preset in advance. The construction efficiency is low and it also affects the anti-corrosion performance of the bolt surface
Use the friction of the nut end face to prevent loosening, such as the end faces with teeth on the flange fastening nuts at both ends of the stainless steel corrugated compensator. The nut after tightening The end face tightly bites the flange end face, and it will not loosen even if the vibration is great, which is second only to the welding anti-loosening method. It should be very extensive in the field of ship, pipeline and aerospace. (However, this method can only be applied to stainless steel nuts. The teeth on the surface of cast steel and graphite iron pipe fittings are easy to rust. It is not recommended to use)
Flexible waterproof casing seals, parting seals and cone seals, type Sealing rings are used in areas with general waterproofing requirements, and tapered sealing rings are used in areas with strict waterproofing requirements. Because the tapered sealing ring has a large sealing area, it forms a taper force with the flange gland when used, and the greater the force. The tighter the seal, the material of the sealing ring is nitrile rubber, flexible waterproof casing and other materials are carbon steel.