直缝焊管的相关规格 37745.8850.3954.8963.8772.8081.67 42651.9157.0362.1472.3382.4692.55102.59 45755.7361.2466.7377.6988.5899.43110.23120.98131.60142.34 508 74.2886.4898.64110.75122.81134.82146.78158.69 529 77.3890.11102.78115.41127.99140.51152.99165.42 559 81.8295.29108.70122.07135.38148.65161.87175.04
关于直缝焊管
直缝焊管的相关资讯 稳压时间:D<508试验压力保持时间不少于5秒; D≥508试验压力保持时间不少于10秒 4 无损检测 钢管的补焊焊缝、钢带对头焊缝及环向缝应进行X射线或超声波检验。
上海薄利多销1Cr18Ni9直缝焊管市场价格弱势持稳
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