Maintenance of spring hangers is crucial to ensuring the safe and stable operation of pipeline systems. Key maintenance measures include regular inspections, cleaning and maintenance, performance testing, and environmental management. These key points are as follows:
1. Regular Visual Inspection
Monthly, inspect the spring surface for cracks, rust, or permanent deformation. Check the connectors (such as bolts and nuts) for looseness. If rust is found, promptly remove and repaint it to prevent further corrosion. Also, check that the displacement indicator is clear and the pointer is not stuck to ensure it accurately reflects pipeline displacement.
2. Load and Displacement Verification
Quarterly, measure the spring preload using specialized tools and compare it to the design value to confirm load deviation. Record pointer displacement during hot operation. If the deviation exceeds 10%, adjust the spring preload or replace the component. Additionally, check the verticality of the pipeline in both hot and cold conditions to prevent tilting due to hanger failure.
3. Cleaning and Anti-corrosion Treatment
Clean the hanger surface annually from oil and dust. Carbon steel components should be re-coated with anti-rust paint, and stainless steel components should be protected from contact with chloride ions. In humid environments, protective covers can be installed to reduce moisture erosion.
4. Operating Environment Monitoring
Ensure that there is no debris accumulated around the supports and hangers to prevent external impact. In high-temperature operating conditions, check the spring material for aging. In low-temperature environments, ensure that anti-freeze measures are in place.
