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1、英国标准BS1387-1985焊接钢管标准壁厚(毫米mm)外径(毫米mm)重量(黑管)千克/米平头参考值最大Max最小MinABCABCABCABC2.02.63.221.421.721.721.021.121.10.9471.211.442.32.63.226.927.227.226.426.626.61.381.561.872.63.24.033.834.234.233.233.433.41.982.412.942.63.24.042.542.942.941.942.142.12.543.103.802.93.24.048.448.848.847.848.048.03.233.574.38
2、2.93.64.560.260.860.859.659.859.84.085.036.193.23.64.576.076.676.675.275.475.45.716.437.933.24.05.088.789.589.587.988.188.16.728.3710.33.64.55.4113.9114.9114.9113.0113.3113.39.7512.114.5-5.05.4-140.6140.6-138.7138.7-16.617.9-5.05.4-166.1166.1-164.1164.1-19.721.3A级管壁厚允差80%B级、C级管壁厚允差10%A轻级(棕色带)B中级(蓝色带)C重级(红色带)成品长度公差为20mm/0，客户要求长度公差也可按6mm/0执行所有钢管均进行在线涡流探伤检验，涡流探伤按GB/T 7735-1995钢管涡流探伤检验方法A级标准执行。
