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Shandong Helen Environmental Protection Science and Technology Development Co., Ltd.  Shandong Bide Complete Equipment Co., Ltd.

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Address: No. 1556 Lingyan Road, Changqing City, Jinan                                                             Telephone: 0531-87218556               Fax: 0531-87226788             Zip code: 250300

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Rubber expansion joint

Rubber expansion joint

Product description

  It’s the hollow rubber product used to link the metal pipes Firstly,it put inner and outer layers of plastic, curtain and steel wire rings together to form tubular rubber parts, then it combines itself with metal flange after high temperature vulcanization molding. As a rubber pipe fitting, rubber expansion joint can greatly reduce or isolate the vibration and noise generated by centrifugal pumps, fans and other large rotating equipment. It can also change equipment and axial, radial dislocation and distortion caused by outside force of tubing. It plays a compensatory role in thermal expansion and contraction due to the temperature change, which is widely applied in the fields of chemical, water supply, drainage, petroleum, plumbing, fire fighting, electricity and other projects.
  Features of products:
  1.It can greatly reduce the vibration and noise of the pipeline system.
  2.It can fundamentally solve the problems of interface displacement, axial expansion and concentricity errors.
  3.The material is rubber and characterized with good sealing, light in weight, accurate and convenient   installation, long service life
  4.Easy to assemble. Only need to install with the valve flange screws without placing the gasket.
  Note: Avoid sharp metal devices from scratching and stabbing
  Applicable media: Air, water, sea water, oil, acid, alkali and so on.
  Temperature range: -15 ℃ -120 ℃
  Pressure range: 0.6MPa -2.5MPa
  Standard sizes: DN25-DN3600(Special specifications needs to be customized)


Ji’nan Changhong Hi-Tech Compound Pipe Co., Ltd. is one of the high-tech enterprises in Shandong Province and a provincial contract-observing and trustworthy enterprise. Also, we are a professional producer of special pipes and fittings with features of anti-friction, corrosion resistance, heat resistance and impact resistance.

We have a production zone and office zone with a total area of 80000m2 and more than 400 employees, 108 professional and technical personnel, among which 37 are with senior or intermediate titles, and our annual output value is over 100 million yuan.We have more than ten years’ experience in R&D and production of special pipe and fittings. These experiences along with the customers around our country make us one of the leading enterprises in our industry.

We focus on product development and technical research. Our R&D center is one of the Ji’nan-identified technology centers and founded close technological cooperation relations with famous universities and colleges in China. Our hi-tech products are widely applied in the fields of electricity, coal, metal-luring, mine, chemical industry and urban network. Also, our products are praised by the users in home and abroad. Our main products are SHS ceramic-lined composite pipe, hard ceramic patch, anti-friction and heat resistance pipe, monolithic, anti-friction and corrosion resistance lining composite pipe, shower, steel-plastic composite pipe, Polyurethane rubber-steel composite pipe, PTFE composite pipe, anti-corrosion and heat preservation pipeline, glass flake, silicon carbide pipe, etc. All of these products are in the National Hi-Tech Research and Development Program of China. The production of large diameter ceramic lined composite pipe were made breakthroughs at the worldwide difficulties, achieved the production capacity at the diameter of 1500-2000mm. This achievement makes us the only domestic industrialized producer of large diameter ceramic lined composite pipe.

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