Repair Reliability Analysis of a Special-Shaped Epoxy Steel Sleeve for Low-Strength Tee Pipes

Ensuring the safe operation of pipe fittings in a natural gas station is critical. The irregular shape tee easily leads to uneven mechanical properties manufacturing process. strength may be lower than requirements due its unqualified heat-treatment As result, selecting reliable way repairing low-strength pipes pressing concern. To repair pipes, special-shaped epoxy steel sleeve (SSESS) was designed. optimize critical design parameters, SSESS criteria were established. Following that, testing conducted using optimized parameters. reliability proved hydraulic burst with strain monitoring and simulations unrepaired repaired tees. result indicated that tee’s yielding pressure increased, demonstrating reliability. Furthermore, revealed stress concentration decrease law.