For our company, quality is a fundamental choice:
A value built over time, with commitment and dedication. Each production cycle phase undergoes strict quality controls, destructive and non-destructive testing and chemical analyses at our internal quality control lab, to ensure our customers to receive certified tube product.
精选国内优特钢原料，每批附质保书
每根钢管20+道质检工序，50+个质检参数
拥有一整套及完善的检测制度与设备
 | 质量管理体系认证 ISO 9001:2015 |  | 质量管理体系认证 IATF 16949:2016 |
| Production cycle | Quality Control |
| Raw material incoming inspection | Chemical composition, metallographic structure, surface quality, geometric dimensioning |
| Cutting | Cutting length and surface |
| Piercing | Inner and outer surface, geometric dimensioning |
| Pickling, Phosphate-saponification | Weight, inner and outer surface, solution assay |
| Cold drawing/ Cold rolling | Incoming quality, inner and outer surface, geometric dimensioning |
| Straightening | Straightness |
| Heat treatment | Mechanical properties |
| Non-destructive inspection | Inner and outer surface |
| Skiving & Burnishing | Inner diameter roughness |
| Finished product inspection | Inner and outer surface, geometric dimensioning, mechanical properties, metallographic structure |
| Ex factory Inspection | Packing, marking, specification, weight, label |
Testing and Inspection Items
Chemical composition
Inner and outer surface quality
Inner and Outer diameter
Concentricity / Wall thickness variation
Straightness
Mechanical properties
Flattening test
Drift expanding test
Surface roughness
Metallographic structure
Non-destructive testing
Other tests as per customer request