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      ASTM A106 không có ống hàn (welded) pipe. Yêu cầu kỹ thuật chỉ có ống seamless.
      --> Xem title và Section 1 - Scope.

      Trường hợp dual markings với API 5L?
      --> Nếu đánh dấu cả hai (dual markings) thì chỉ áp dụng cho seamless pipe.

      Còn ống hàn (welded) thì chỉ áp dụng theo Tiêu Chuẩn API 5L hoặc tiêu chuẩn khác như A53.

      • This topic was modified 1 month, 2 weeks ago by bien. Reason: change topic_forum
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