Anti Aging and Long Term Operation Performance of Pipe Repair Coupling

Pipe repair coupling serves synchronously with pipelines for decades,enduring long-term medium erosion,pressure fluctuation,temperature cycle change and environmental oxidation.Aging failure such as gasket hardening,metal corrosion and bolt loosening often occurs in long-term operation,leading to sealing attenuation and secondary leakage.Research on its anti-aging performance and stability maintenance is crucial for extending pipeline maintenance cycle.

The sealing gasket is the most vulnerable aging part of the repair coupling.Ordinary rubber gaskets are prone to thermal aging and oxidative aging under long-term variable temperature and pressure conditions,resulting in reduced elasticity and brittle failure.High-quality pipe repair couplings adopt modified EPDM and fluorine rubber materials,which have excellent anti-aging and anti-fatigue properties.They can resist repeated temperature changes and pressure impacts,maintaining stable elastic sealing performance for more than 18 years in conventional buried environments.

Metal coupling bodies achieve long-term anti-aging stability through material optimization and surface treatment.Iron-based couplings adopt hot-dip galvanizing and anti-rust coating processes to isolate air and humid soil,preventing surface oxidation and corrosion peeling.Stainless steel couplings have inherent corrosion resistance,avoiding rust and structural attenuation in humid and saline environments.High-strength anti-loosening bolts are equipped to prevent loosening failure caused by long-term pipeline vibration and medium impact.

Structural design further enhances long-term operational stability.The flexible sealing structure can adapt to micro displacement and deformation caused by pipeline thermal expansion and ground settlement,avoiding sealing failure due to pipe body displacement.The integral rigid structure improves overall rigidity,resisting external soil pressure and mechanical impact,preventing coupling deformation and position offset in long-term buried operation.

Daily scientific maintenance is an effective way to delay component aging.Regular visual inspection and pressure detection are required for key repair positions to check gasket aging,shell corrosion and bolt looseness.Timely cleaning of surface sediment and corrosive attachments reduces material erosion speed.Periodic torque calibration of fastening bolts ensures continuous and stable sealing pressure,maximizing the service life of pipe repair couplings.

References

GB/T 7714

[1]Richardson K,Foster B.Aging Mechanism and Stability Maintenance of Pipeline Repair Fittings[J].Material Durability Research,2020,26(9):63-70.

MLA

Richardson,Kyle,and Bradley Foster."Aging Mechanism and Stability Maintenance of Pipeline Repair Fittings."Material Durability Research,vol.26,no.9,2020,pp.63-70.

APA

Richardson,K.,&Foster,B.(2020).Aging mechanism and stability maintenance of pipeline repair fittings.Material Durability Research,26(9),63-70.