- Establish quality system completely
- Comply with the regulations
- Continuous improvement
- Safety production
- Enhance the brand
- Enhance customer satisfaction.
- Final product inspection pass rate greater than 96%;
- On time delivery rate greater than 90%
Incoming Quality Control
warehouse entry material inspection – warehouse entry inspection record, Physical and chemical examination report
Manufacture Quality Control
- Blanking test – grades, dimension, size, identification
- Heat treatment – heat treatment temperature, time
- Welding – welding condition, welding record
- Others – size, surface quality, identification
Final Quality Control
- Dimensions – outside diameter, wall thickness, length, both ends, out of roundness
- Surface –
- Others – chemical analysis, tensile strength, intergranular corrosion, grain size, NDT test, hydrostatic test, impact test
- Marking – brand, product name, steel No., sizes, standard, heat No., lot No.
- Factory file – receiving report, testing report, physical and chemical examination report, NDT report, heat treatment report.