| Connection typecharacteristic | Groove Clamp | Expansion Joint | Metal hose | Pipe Coupling |
| Thermal expansibility | Because the shell is made of cast steel and depends on inner rubber, it has certain thermal expansion. | Rubber material has thermal expansion | At present, the compressor is widely used with thermal expansion | Aisi stainless steel shell has certain elasticity, the inner rubber also has elasticity, and the overall thermal expansion of the product is higher. |
| Noise reduction performance | Both ends of the product need to be embedded in the pipe end, and the noise reduction is not obvious | The middle rubber can reduce noise | The middle part can reduce noise | Close contact between rubber and outer wall of pipe can reduce noise |
| Seismic resistance | Anti-seismic | Earthquake resistance, easy to fatigue | Earthquake resistance, easy to fatigue | Anti-seismic |
| Pipeline displacement | Due to the particularity of the installation, the pipeline has no displacement characteristics. | The compensation of this product is strict, the pressure bearing capacity is inversely proportional to the compensation, and the compressor is relatively less used. | The actual metal hose only plays the role of shock absorption, and the compensation is not as good as the expansion joint | The allowable axial displacement is 0-80mm according to the pipe diameter. The longitudinal angle is less than 10 degrees. |
| Installation requirements | Both ends of the pipe need special machining precision and high additional cost. In order to ensure convenient installation, two such joints are usually needed for one pipe to increase the cost again. | The connection speed of flange at both ends is slow affected by the installation space and pipe diameter, and the first installation has low trafficability. | The connection speed of flange at both ends is slow affected by the installation space and pipe diameter, and the first installation has low trafficability， | According to the pipe diameter of 1-2 bolts, the compressor can be installed at 0-360 degrees without space impact. It can be completed in 2-4 minutes. The first installation has high trafficability. Tube ends do not need to be machined. |
| Fatigue resistance | Strong | Poor | Poor | Strong |
| Tensile Strength | Strong | Poor | Poor | 3-5 tons tested |
Post time: Jun-02-2020