The latest offer of stainless steel pipe quality standards has six requirements (stainless steel pipe plant)

The latest offer of stainless steel pipe quality standards has six requirements (stainless steel pipe plant)
1, the product meets GB/T requirements, outside diameter: 70 ± 0.3mm, wall thickness tolerance: 2.2 ± 0.2mm, length tolerance: 4060-0/+5mm;
2, bending degree to meet the E3 standard (full-length bending 0.1%);
3. The ellipticity satisfies NR2 (the ellipticity is not more than 5% of the allowable deviation of the outer diameter);
4, the outer wall polishing Ra ≤ 0.8 (or Ra ≤ 0.1);
5, pressure: 4MPa; properly protected during transportation, not scratched or scratched the outer wall.
6, stainless steel pipe inside and outside the surface clean water-free stains, dry inside and outside the pipe, the outer wall without straight print marks, smooth nozzle without burr.
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