special section tubes

API(American Petroleum Institute),API 5L Line Pipe,API 5D

The American Petroleum Institute, commonly referred to as API, is the largest U.S trade association for the oil and natural gas industry.[……]

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ASTM A179, ASME SA179

ASTM A179 covers minimum-wall thickness, seamless cold-drawn low-carbon steel tubes for tubular heat exchangers, condensers, and similar heat transfer apparatus. [……]

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