03 · 质量控制
QUALITY CONTROL
Every order passes a documented five-stage check before it leaves China. Third-party inspection is always welcome.
01
Mill Vetting
厂家审核
We buy only from mills we have audited and worked with over years.
02
Raw Material
原材料核验
Heat numbers and chemical composition checked against the MTC.
03
In-Process
过程检验
Dimensions, wall thickness, ovality and weld quality monitored in production.
04
Final Check
成品检验
100% visual and dimensional inspection with photo report before packing.
05
Pre-Shipment
发货前确认
Marking, coating and packing verified; third-party inspection welcome.
TESTING & NDT · 检测项目
▸Hydrostatic pressure test
▸Ultrasonic testing (UT)
▸Eddy current testing
▸Chemical composition
▸Tensile & yield strength
▸Flattening / bend test
DOCUMENTATION · 质量文件
▸Mill test certificate EN 10204 3.1
▸Packing list & marking photos
▸Third-party inspection reports (SGS / BV / TÜV)
▸Certificate of origin, FORM A / E where applicable