The expansion joint is a connector that compensates for the size change caused by thermal expansion and cold contraction in pipe connection. There are two kinds of expansion joints most commonly used, one is metal expansion joint and the other is rubber expansion joint.
Rubber expansion joint is also called rubber flexible joint, flexible rubber joint, flexible rubber joint and rubber shock absorber. It is mainly composed of tubular rubber parts composed of inner and outer rubber layers, cord layers and steel wire beads, which are vulcanized at high temperature and high pressure and then combined with metal flange loose sleeves.
Scope of application:Rubber expansion joints are especially suitable for the connection of pumps and valves, pipelines with large vibration, and pipelines with frequent changes in cold and heat due to their good comprehensive performance. It is also commonly used in sea water, fresh water, cold and hot water, drinking water, domestic sewage, crude oil, fuel oil, lubricating oil, product oil, air, gas, steam and particle powder fields. It is widely used in fire protection, chemical, valve and other pipeline systems to reduce earthquake and noise and absorb displacement generated during pipeline operation.
Rubber expansion joint features:
1. Small size, light weight, good elasticity, convenient installation and maintenance.
2. During installation, axial, transverse, longitudinal and angular displacement can occur, which is not constrained by the user’s pipe non centering and flange non parallelism.
3. When working, the layout can be lowered to reduce noise, and the vibration absorption capacity is strong.
4. With special synthetic rubber, it can resist high temperature, acid and alkali, and oil. It is a chemical corrosion-resistant pipeline; Ideal product.
Metal expansion joint is a flexible structure set on the vessel shell or pipeline to compensate the additional stress caused by temperature difference and mechanical vibration. As an elastic compensation element with free expansion and contraction, it has been widely used in chemical, metallurgical, nuclear and other sectors due to its reliable operation, good performance, compact structure and other advantages.
Metal expansion joint features:
High temperature resistance, high pressure resistance, large expansion compensation.
Both rubber expansion joints and metal expansion joints belong to pipe equipment joint products. Literally, the difference between the two materials can be seen:
The main body of the rubber expansion joint is a hollow sphere made of rubber, and both ends are connected by flanges; The main body of the metal expansion joint is made of metal products, and the two sides are connected with flanges, screw threads or grooves, looper flanges and other connection forms. The rubber expansion joint, due to its good elasticity, air tightness, wear resistance, pressure resistance and many other advantages, can not only compensate the mechanical displacement of pipeline equipment operation, but also the axial, transverse and angular displacement changes caused by thermal expansion and contraction factors such as environment, medium, etc., and can absorb equipment vibration, reduce noise pollution, making great contributions to the protection of environmental noise pollution.
The metal expansion joint generally refers to the metal hose connector. The main body is composed of corrugated pipe and a layer of stainless steel wire woven mesh, or stainless steel woven mesh. It is very convenient to use in complex pipeline systems or pipeline systems with limited installation. It is a flexible joint product of pipeline systems.
Post time: Oct-19-2022
