single VS double sphere expansion joint in pipelines
According to the number of rubber joints between the connecting flanges, rubber expansion joints can be divided into two types: single sphere rubber joints and double sphere rubber joints. When asked about the difference between these two kinds of rubber joints, many people are not clear, so today we will inform you.
Single sphere rubber joints can be said to be the originator of other rubber joints, which is due to the fact that the current variety of rubber joints are all developed above its basic products, including double sphere rubber joints are not excluded.
What is the difference between double sphere and single sphere rubber joints ?
- Performance indicators and installation are basically the same.
Appearance difference: double expansion joint is two balls, single expansion joint is one ball. The total length of double spheres joints contains stretching and shrinking amount are larger than that of single sphere joints.
According to the appearance design is divided into the same boat equal diameter, the same boat different diameter, axial force different diameter. According to the coupling way live sleeve flange, bolt connection, threaded steel pipe live sleeve flange.
- Single rubber joints have excellent shock absorption and noise reduction, compressive strength and tensile properties, but the radial, horizontal and angular displacements of double expansion joints need to be widely higher than single ball rubber joints.
- However, at the level of pressure resistance, the double rubber joints are not up to the same pressure resistance specifications as the single ball expansion joints because of the limited structure.
- Because the double sphere rubber joint is selected from the double ball type, the total length of the joint of this type of rubber joint is stronger than that of the single ball rubber joint, and the amount of compensation is higher than that of the single ball rubber soft joint, and the double sphere rubber soft joint has a higher amount of compensation and displacement perspective.
- The reliability coefficient of double rubber joints is not as high as that of single rubber joints, so it is important to pay attention to the general application, especially in the case of double rubber joints where the spherical joints are easily cracked.
Conclusion
The characteristics of the double ball rubber expansion joint have all the characteristics of single ball joints. In fact, single ball or double ball is applied in the same area, in fact, from the advantages of its appearance characteristics, it seems that double ball is longer than single ball, thus the amount of compensation and displacement is large, and the perspective are larger. Due to the total length of the single ball joints, the reliability is higher than the double ball joints. When the compressive strength is too high, only single ball joint is applied, if a double ball joint is applied, the ball will deform and shatter!
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Hi, I’m the author of this post, and I have been in this field for more than 10 years. If you want to get more info about industrial pipe rubber expansion joints, feel free to ask me any questions.
