The rubber joint is a flexible connecting piece made of natural and/or synthetic elastomer and fabric. It can be reinforced with internal metal to reduce the piping system’s thermal movement and mechanical vibration. Depending on the application, rubber joints can use a variety of materials. Compared with metal joints, rubber joints also have advantages and disadvantages: rubber joints can absorb large movements in a short distance. They provide movement in all directions, such as axial, angular, lateral, and torsional movements due to external conditions. And earthquake movement.
Advantages In corrosive applications and installations that require a long service life, ball joints have obvious advantages over metal expansion joints. Compared with coil sealing, this circuit prevents sludge formation and produces less turbulence and pressure drop. The sealing lip makes the seal between the mating flanges redundant.
Rubber joints can install it on raised or flat flanges. Temperature comparison with metal expansion joints: The temperature range of standard design and material rubber seals exceeds 110°C. Special designs up to 200°C are available. They offer a significantly higher range from -250°C to +950°C.
Compare rubber expansion joints Pressure: The rubber seal can withstand pressures up to 15 bar under full vacuum, depending on the diameter. Metal seals can be designed for pressures up to 100 bar. Movement: Rubber and metal expansion joints have similar movement capabilities in the axial plane (however, rubber hinges can absorb larger lateral movement when subjected to lateral movement and are generally smaller than metal joints with the same external dimensions on both sides have lateral displacement characteristics.
Acoustic impedance: Although well-designed (multi-layer) pipe bellows can reduce the transmission of visible vibrations, they can still transmit interference and/or harmful noise. Rubber gaskets greatly reduce unwanted transmission in the piping system. The ointment acts as a damping agent. It absorbs the highest noise level and obvious vibration wear/corrosion resistance: the wall thickness of the metal gasket is usually 0 from 15 mm to 2 mm. The rubber pad is much thicker, from 12 mm to more than 25 mm. The thin design of the metal seal makes it vulnerable to corrosive chemicals, abrasive fluids, and mud.
Rubber seals are very resistant to wear and corrosion and are superior to metal seals under these conditions. Fatigue/Life Cycle: The fatigue life of a metal gasket depends on many factors, including temperature, pressure, motion, vibration, and the original seal design. Metal seals usually have a certain cycle or fatigue life, which can be calculated using various formulas (EJMA).
Due to excessive cycling/movement, metal seals often experience fatigue failure. On the other hand, rubber seals are manufactured. Elastic elastomer, the seal itself acts as a shock absorber. It will not interrupt the assembly/maintenance of the tire/circuit: rubber seals do not require additional seals, and in many cases, there are no metal seals when installed, and rubber joints can repair them from time to time. Ensure that the seal on the flange is intact and undamaged.
Material selection: The material selection of rubber expansion joints varies depending on pressure, temperature, fluid, and other parameters. Common materials are EPDM, IIR, NBR, PTFE, and their combination with these materials depends on the application. Rubber joints can change the diameter of the outer tube according to the design conditions.
We have a line of different Rubber Joints. Please take a look and send us an RFQ, and we can supply what is needed.
We design and manufactures a full range of custom molded rubber bellows for various applications. Rubber bellows are designed to withstand dust, water, oil, grease, acid, bleach, and splashes. It has been a custom bellows manufacturer since 1996. We understand bellows…
We meet your needs. Many engineers strive to understand each customer’s specific application needs to customize bellows rubber boots according to their specifications. We use special manufacturing technology and carefully selected materials to ensure the production of our products.
We are a world-class manufacturer of bellows and can accept large to small orders, even single prototypes. Rubber Bellows are very flexible. Most rubber bellows are made of nitrile rubber (NBR). However, orders over 25 can be made of natural rubber, neoprene/neoprene, EPDM, or silicone according to your specific requirements. See the complete list of materials below. Our rubber bellows can be used in various industries, including machine tools and medical protection. Read about rubber expansion joints.
In the world of pipefitting and plumbing, there are several different ways to connect pipes. However, many companies have increasingly turned to rubber expansion joints for their projects, and the reasons are simple. Here are just a few reasons why companies often choose rubber joints over other kinds of connections for projects of any size.