Rubber expansion joints systems

Improved service water reliability by elimination of rubber expansion joints in the recirculated cooling water system and minimization of their use in the raw service water systems... 

Tyres are normally cured in a modification of the compression mould where a bladder or an inflated airbag forces and holds the green rubber stock of the tyre against the mould surface during vulcanization. This force reproduces the design of the tyre tread and the heat from the steam is introduced into the bladder to effect the vulcanization. Small size rubber expansion joints used in piping systems are moulded by compression moulding... 

Stability, fluid compatibility and fatigue resistance also are associated with wear resistance. Vibration and pulsation in mechanical systems, or pipelines are common in chemical process industries and can lead to leakages of corrosive fluid. The vibration fatigue is an unavoidable factor which is further aggravated by improper installation of the moving system. Leakages due to these pulsations can be prevented by the installation of flexible rubber expansion joints. 

For piping systems conveying hydrocarbons, emulsions, saline solutions, air, gas, steam, liquids, hydraulic fluids and fuels, suitably designed rubber expansion joints are usually installed within the piping system to accommodate forces due to movement and thermal expansion, and so prevent leakages. 

Rubber expansion joints are successfully used in several industrial plants, nuclear and military installations to control leaks in hot and cold water distribution systems, chilled water and condensed water piping, and suction and discharge sides of pumps adjacent to compressors. 

When bonding compounded rubber to fabric, for the manufacture of fabric reinforced expansion joints in the chemical plant piping systems, mechanical anchoring between cotton/Nylon/fibre and compounded rubber should be sufficient to ensure good adhesion. Synthetic fibres require treatment with chemical coatings to secure maximum adhesion and bond [8, 9]. 

Component Manufacturer. Designs and assembles systems that may include rubber parts (e.g., mechanical seals, expansion joints, valves). 

Expansion joints for a central heating system made from a natural rubber/polychloroprene blend severely degraded due to metal ions catalysing thermo-oxidation. It is well known that many rubbers are susceptible to this type of degradation and it is a distinct possibility that a water supply will contain metal oxides. The material had been chosen on the basis of cost and resistance to water at 85 °C and there had been no direct contact between the supplier and end customer. 

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