Along with the years of entrepreneurial journey of Zhongyuan people, she gradually formed her own spiritual pillar and behavioral norms. In the silent inheritance, she guided Zhongyuan Company towards a more brilliant tomorrow.
| Tolerance of Outside Diameter and Wall Thickness of SSAW Steel Pipe 螺旋埋弧焊管外径和壁厚公差 | ||||||
| Standard 标准 | Tolerance of Pipe Body 管体公差 | Tolerance of Pipe End 管端公差 | Tolerance of Wall Thickness 壁厚公差 | |||
| Out Diameter 外径 | Tolerance 公差 | Out Diameter 外径 | Tolerance 公差 | |||
| API 5CT | OD<114.3 | ≤±0.79mm | OD<114.3 | ≤±0.79mm | ≤-12.5% | |
| OD≥114.3 | -0.5%～1.0% | OD≥114.3 | -0.5%～1.0% | ≤-12.5% | ||
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