Bellow joints
Bellow joints can also be called: flexible rubber joints, rubber soft joints, soft joints, flexible rubber joints and other expansion joints. They are pipe joints with high elasticity, high air tightness, medium resistance and weather resistance. Rubber joint is a kind of composite rubber pipe, which is composed of inner rubber layer, fabric reinforcement layer (the reinforcement layer has multi-layer nylon rope), middle rubber layer, outer rubber layer, end reinforced metal ring or steel ring, which is loosely combined with metal flange or parallel joint after vulcanization at high temperature and high pressure.
Performance characteristics of bellow joints
1. High elasticity
2. High gas resistance
3. Medium resistance
4. Weather resistance
5. Radiation resistance
6. It can reduce the vibration and noise of the pipeline
7. Compensate for thermal expansion and cold contraction caused by temperature change.
Technical data of bellow joints
| Main data of bellow joints |
| Nominal diameter(DN) | Length | Axial displacement(mm) | Horizontal displacement | Deflexion angle |
| mm | inch | mm | Extension | Compression | mm | (a1+a2)° |
| 32 | 1 1/4 | 95 | 6 | 9 | 9 | 15° |
| 40 | 1 1/2 | 95 | 6 | 10 | 9 | 15° |
| 50 | 2 | 105 | 7 | 10 | 10 | 15° |
| 65 | 2 1/2 | 115 | 7 | 13 | 11 | 15° |
| 80 | 3 | 135 | 8 | 15 | 12 | 15° |
| 100 | 4 | 150 | 10 | 19 | 13 | 15° |
| 125 | 5 | 165 | 12 | 19 | 13 | 15° |
| 150 | 6 | 180 | 12 | 20 | 14 | 15° |
| 200 | 8 | 210 | 16 | 25 | 22 | 15° |
| 250 | 10 | 230 | 16 | 25 | 22 | 15° |
| 300 | 12 | 245 | 16 | 25 | 22 | 15° |
| 350 | 14 | 255 | 16 | 25 | 22 | 15° |
| 400 | 16 | 255 | 16 | 25 | 22 | 15° |
| 450 | 18 | 255 | 16 | 25 | 22 | 15° |
| 500 | 20 | 255 | 16 | 25 | 22 | 15° |
| 600 | 24 | 260 | 16 | 25 | 22 | 15° |
Note: 1. The special requirements of bellow joints can be customized according to user's drawing. Flange standard is GB / t9115.1-2000. Various flange standards (GB, JB, Hg, CB, ANSI, DIN, BSEN, NF, en, JIS, ISO, etc.) can be selected for production. The rubber ball of joint expansion can be used as natural rubber, EPDM, chloroprene rubber, butyl rubber, butadiene rubber, fluororubber, etc. when the joint expansion above DN200 is used for suspension water supply, the pipeline must have fixed support or fixed support, otherwise the joint expansion shall be installed with anti falling device.
Bellow joints details show
Bellow joints production flow
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When selecting a suitable flexible joint pipe, it is very important to understand the compatibility between the joint expansion medium and the selected expansion rubber material, the full temperature, full pressure and full vacuum range, the required joint expansion movement and the size between pipe flanges. With this information, Jingning application engineers can help determine the ideal expansion joint for any application.
Bellow joints advantage
1. The product is the ex factory price.
2. 17 years of manufacturing experience and 5 years of export experience.
3. Strict quality inspection, the quality far exceeds the industry standard.
4. It has a variety of specifications and supports customization and OEM.
5. Provide samples free of charge.
6. Large inventory.
Bellow joints application
Bellow joints are mainly used for the lifting and transportation of remote water and sewage, water supply and cooling circulating water of thermal power plants, pipeline transportation in metallurgical industry, condensate water, pipeline transportation in chemical industry, cooling and dilution in petrochemical industry, and flexible connection between long-distance and short-distance pipelines in other industries. Due to its high wear resistance, the expansion joint is also suitable for all particle, powder and gas low-temperature industries.
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