This specification covers tubes 1/8 to 3 in. [3.2 to 76.2 mm],
inclusive, in outside diameter. Note 1Tubing smaller in outside
diameter and having a thinner wall than indicated in this
specification is available. Mechanical property requirements
do not apply to tubing smaller than 1/8 in. [3.2 mm] in outside
diameter or with a wall thickness under 0.015 in. [0.4 mm].
This specification covers minimum-wall thickness, seamless cold-drawn low-carbon steel tubes for tubular heat exchangers, condensers, and similar heat transfer apparatus. Tubes shall be made by the seamless process and shall be cold drawn. Heat and product analysis shall be performed wherein steel materials shall conform to required chemical compositions of carbon, manganese, phosphorus, and sulfur. The steel materials shall also undergo hardness test, flattening test, flaring test, flange test, and hydrostatic test.