Low quality problem is one of the reasons that LongS is trusted. We are always trying best to seek Zero defect. We perform quality control strickly in accordance with ISO9001 quality management system, every step, from material supply to shipment. We have the labrotary and kinds of test equipments.We can do the chemical analysis, mechnical test, low temperature treatment & test, impact test, NDT and so on.. Every our inspector is approved with certificate. Each part must get to ASTM standard before leaving for next step, and every product must be qualified before leaving our factory.
PMI
Mechanical & Chemical
Tensile Test
MPT
Ultrasonic Test
Hardness Test
Hardness Test
Thickness Test
Low Temperature Treatment