1.1 本规范涵盖了所选合金中的铝合金挤压结构管 表1 和所示的脾气 表2 ，并采用中所示的标准尺寸 表3- 5. 以及买方和供应商商定的其他非标准尺寸。此类管道拟用于结构应用，如公路和桥梁轨道、铁丝网围栏柱、扶手、标志结构、雨篷支架、照明支架等。结构管道不拟用于涉及压力的流体输送应用。 注1: 有关压力应用中使用的拉制无缝管，请参阅规范 B210/B210M ，有关压力应用中使用的无缝管和无缝挤压管，请参阅规范 B241/B241M ，对于一般用途的拉制管材，请参见规范 B483/B483M . 1.2 合金和回火名称符合ANSI H35.1/H35.1M。等效的统一编号系统合金名称为 表1 前面是A9（例如，根据惯例，合金6061的A96061 E527 ). 1.3 有关本规范中包含新铝和铝合金的验收标准，请参阅 附件A2 . 1.4 单位- 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。括号中显示了国际单位制。每个系统中规定的值不一定是精确的等价物；因此，为确保符合本标准，每个系统应独立使用，且两个系统的值不得组合。 1.4.1 公制尺寸- 虽然这是国际单位制和英寸磅单位的组合规范，但管道没有标准的等效公制名称。 公制尺寸仅为方便用户而转换和显示。 1.4.2 虽然这是国际单位制和英寸磅单位的组合规范，但标准管道尺寸不适用于国际单位制，因此为了方便读者，显示了非合理化的国际单位制（软转换）。合理化[硬转换]国际单位显示在括号中，而非合理化（软转换）国际单位显示在括号中。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers aluminum-alloy extruded structural pipe and tube in those selected alloys shown in Table 1 and tempers shown in Table 2 , and in those standard sizes shown in Tables 3- 5 , as well as in other nonstandard sizes as agreed upon between the purchaser and supplier. Such 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 Specifications B210/B210M , for seamless pipe and seamless extruded tube used in pressure applications see Specifications B241/B241M , and for drawn tube and pipe for general purpose applications see Specification B483/B483M . 1.2 Alloy and temper designations are in accordance with ANSI H35.1/H35.1M. 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 Units— The values stated in either SI units or inch-pound units are to be regarded separately as standard. SI units are shown in brackets. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.4.1 Metric Sizes— While this is a combined SI and inch-pound units specification, there are no standard equivalent metric designations for pipe. Metric sizes are converted and shown only for user convenience. 1.4.2 While this is a combined SI and inch-pound units specification, standard pipe sizes are not applicable to SI units, therefore non-rationalized SI units (soft conversions) are shown for reader convenience. Rationalized [hard converted] SI units are shown in brackets while non-rationalized (soft converted) SI units are shown in parentheses. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.