1.1 This specification covers aluminum and aluminum-alloy tubes made from formed sheet and seam welded by continuous methods.

1.2 Alloy (Note 1) and temper designations are in accordance with ANSI H35.1/H35.1(M). The equivalent Unified Numbering System alloy designations are those of Table 1 preceded by A9, for example, A91100 for aluminum 1100 in accordance with Practice E527.

Note 1 - Throughout this specification use of the term alloy in the general sense includes aluminum as well as aluminum alloy.

Note 2 - For the requirements for sheet see Specification B209.

1.3 For acceptance criteria for inclusion of new aluminum and aluminum alloys in this specification, see A1.2.

1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.4.1 SI Units - The SI units are shown either in brackets or in separate tables.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.