密封性: 管应该通过水压试验(7Mpa) 或电磁试验各种钢管 压力用途的无缝钢管- 有规定低温特性的非合金及合金钢管(标准:PN-EN 10216-4)
生成方法及用途
这种管主要用于电力行业及其相关行业。这种管用于在低温和高压下运行的设备和装置.
由于很好的抗冲击性,它们在低温下开裂的可能性很小.
热轧尺寸范围: 直径为21,3 – 660 mm 厚度至100 mm
冷拔尺寸范围: 直径为10,2 – 108 厚度至12,5 mm
生产在TC1和TC2试验范围内进行
使用的钢种:
P215NL, P255QL, P265NL, 26CrMo4-2, 11MnNi5-3, 13MnNi6-3, 12Ni14, X12Ni5, X10Ni9
尺寸:
外直径: 10,2 至711 mm
厚度: 至100 mm
长度: 6 和12 m, 超过12m的需提前商量
试验方法与要求
试验: 冶炼分析,室温下的拉力测试, 压扁试验的D<600mm 和D<=0,15 但T<=40mm
D>150mm和 T <=40mm的管环破测试, 扩口试验D<=150mm 和T<=10mm lub
管环拉伸试验(D<=114,3mm 和 T <=12,5mm),
d20 ºC下的冲击试验
密封性试验, 尺寸检查, 外观检查, NDT 无损的不连续性的检测,非合金钢的材料识别. 合金钢的材料识别
直线度: < 0,0015 管的长度(管的每1米小于3mm).
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