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A S T M B619中1.3条规定本标准管道有两种级别如下:
Class I — As welded and solution annealed or welded and sized and solution annealed.
等级一:焊接管道、固溶处理或者整管切割分段后固溶处理?
Class II — Welded, cold worked, and solution annealed.
等级二:冷加工焊接管道、固溶处理
上述的As welded和Welded有什么区别吗?级别二中注明管道是冷加工工艺,那么级别一的管道是热成型?求解~ |
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