Our mission is to provide our customers only with the best quality products. As an ISO9001:2015 and PED 2014/68/EU, API 6A certified manufacturer, we fully understand that it is impossible for us to provide high-quality products without strict Quality Control at every stage of production.
We are constantly working to identify nonconforming products at every stage of production in our factory. We know that "The cost of Quality exceeds The Cost of Failure".
Our quality inspection team, regularly calibrated equipment and measuring instruments, and third-party inspection agencies are the guarantee for us to provide high-quality products.
We provide EN10204 Type 3.1 certificates and test inspection report for every order. We also welcome third-party testing agencies such as BV, SGS and others come to our factory for inspections.

Our QC activities and test methods:

Chemical Analysis - ASTM E1473
Tensile Test - ASTM E8
Hardness Test - ASTM E10,E18
PMI Examination - DINGHAN SOP
Ultrasonic NDT - BS EN 10228
Liquid Penetrant NDT - ASTM E165
Dimensional and Inspection - DINGHAN SOP
Roughness Test - DINGHAN SOP
Impact Test -ASTM E23

Low Temperature Impact Test - ASTM E23
Creep and Stress Rupture Test - ASTM E139
Hydrogen Induced Cracking Test - NACE TM-0284 *
Inter Granular Corrosion Test - ASTM A262 *
Sulfide Stress Corrosion Cracking Test - NACE TM-0177 *
Pitting and Crevice Corrosion Test - ASTM G48 *
Macro Etching Test - ASTM E340 *
Grain Size Test - ASTM E112 *
* Done by state own third party laboratory