Henan Lianghe Pipeline Equipment Co.,Ltd quality control

Quality control is paramount in the manufacturing of rubber expansion joints to ensure longevity, reliability, and safety in demanding applications. Our process begins with stringent raw material selection, verifying the chemical and physical properties of compounded rubber and fabric reinforcements.

Each joint undergoes meticulous vulcanization under controlled time, temperature, and pressure to achieve optimal elasticity and strength. We conduct 100% pressure testing on every unit, subjecting it to pressures exceeding its rated working limit to check for leaks, blisters, or deformations. Dimensional checks are performed against precise specifications for length, diameter, and flange alignment.

The final inspection includes a visual assessment for surface imperfections and a review of material certifications. Traceability is maintained throughout, with each joint marked with a unique identifier linking it to its production batch and test data, ensuring full accountability and consistent performance.