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1.1 This specification covers aluminum-alloy pipe and extruded tube in selected alloys and tempers and in standard sizes as shown in the tables in Appendix X1. This pipe and tube is intended for use in structural applications such as highway and bridge rails, chain-link fence posts, handrails, sign structures, awning supports, lighting brackets, etc. Structural pipe and tube is not intended for fluid-carrying applications involving pressure.Note 1-For drawn seamless tube used in pressure applications see Specification B210, and for seamless pipe and seamless extruded tube used in pressure applications see Specification B241.
1.2 Alloy and temper designations are in accordance with ANSI H35.1. The equivalent Unified Numbering System alloy designations are those of Table 1 preceded by A9, for example, A96061 for alloy 6061 in accordance with Practice E527.
1.3 For acceptance criteria for inclusion of new aluminum and aluminum alloys in this specification, see Annex A2.
1.4 The values stated in inch-pound units are the standard. The values given in parentheses are for information only.
ICS Number Code 77.150.10 (Aluminium products)
UNSPSC Code 31111501(Aluminum profile extrusions); 40171507(Commercial aluminum pipe)