Installation steps and precautions for rubber joints
Release time:
2025-03-12
Pre-installation Preparation: Vertically weld the flanges, ensuring the flange waterline faces outward, and leave sufficient space between the flanges for the installation of the rubber expansion joint.
Flange Connection: Connect the flanges at both ends of the rubber expansion joint to the pipe end flanges using fasteners. Note: Tighten the nuts in sequence diagonally and evenly; avoid uneven tightening.
Hydraulic Test: After installation, conduct a hydraulic test on the rubber expansion joint. After the water pressure test and weighing, tighten the connecting bolts again using the same method to prevent local leakage.
Types and Applications of Rubber Joints:
Rubber joints come in various types, including threaded connections, flanged connections, and clamp connections. Threaded connections require placing the two pipe fittings horizontally and then tightening the threads; flanged connections require aligning the flange holes, inserting screws, and tightening the nuts; clamp connections use clamps for fixation. These joints are widely used in various piping systems, especially where vibration damping and displacement compensation are needed, such as pump and valve connections, pipes with high vibration, and pipelines with frequent temperature changes.
Maintenance and Care of Rubber Joints:
Fixed Support: The pipeline must have fixed supports or brackets, and the force of the brackets must be greater than the axial force. During vertical and overhead installation, corresponding fixed brackets and support brackets should be installed at both ends of the product to prevent pressure-induced detachment.
Bolt Tightening: The bolt threads should extend towards the pipe flange to prevent the threads from damaging the arched part of the rubber joint during pressure expansion. The bolts on both ends must be tightened symmetrically to ensure consistent tightness of all bolts. In harsh environments, in addition to flat washers, spring washers should also be added to prevent nut loosening.
Pre-tensioning: Do not pre-tension the rubber expansion joint beyond its natural length.
By following these steps and precautions, you can effectively install and maintain rubber joints, ensuring their normal use and long-term stability in various piping systems.
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