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About This Item

 

Full Description

Applies to charcoal wrought iron lapwelded tubes intended primarily for use int he construction of boilers, unfired pressure vessels and their appurtenances.
 

Document History

  1. AS B20-1949

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    Charcoal wrought iron lapwelded tubes for boilers and unfired pressure vessels

    • Most Recent
  2. AS B20-1940


    Charcoal wrought iron lapwelded tubes for boilers and unfired pressure vessels

    • Historical Version
  3. AS B20-1931


    Charcoal wrought iron lapwelded tubes

    • Historical Version