ASTM A539-99

1.1 This specification covers one grade of electric-resistance-welded coiled steel tubing 2 3/8 in. (60.3 mm) and under in outside diameter and 0.035 to 0.125 in. (0.89 to 3.18 mm), inclusive, in average wall thickness. The tubing is intended for conveyance of gas and fuel oil. 1.2 The values stated in inch-pound units are to be regarded as the standard.