Quality Control
Raw material quality control:
- Thickness tolerance re-check
- Yield point and tensile strength testing in-house
- Third party inspection are welcome
- Supply traceable mill certificate.
Structural steel fabrication quality control:
- 100% testing dimension tolerance <3mm
- 20% sample welding line ultrasonic testing, no fault, full penetration
- 20% magnetic powder testing, no bubble, no defect, Smooth and Full
- Supply third-party inspection assistance.
Anti-corrosion system quality control:
- Shot blasting to reach grade Sa. 2.5, surface metal luster, no rust, no oil dirt, no welding spatter, Roughness >75um
- Apply primer paint within 4 hours after shot blasting, Holiday-free coatings, smooth, No dust, Dry Film Thickness (DFT) >75μm.
Pre-assembly testing the connection details:
For special shaped steel structures components, we apply pre-assembly test in workshop before package and delivery.
Certifications
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Certifications
Qingdao Tsin Steel Structure Construction Technology Co.,Ltd.
Tel:86--13969825647
Fax:86--13969825647
Contact Person: Ms.Alice Lee
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