1.1 本规范 2. 包括表1[表2]所示的用于压力应用的合金和回火的铝和铝合金无缝管以及无缝挤压圆管。表中列出了无缝管的标准尺寸 ANSI H35.2和H35.2（M）的16.7。非标准合金、回火和尺寸的管道被生产为无缝挤压管。本标准还包括《规范》之前涵盖的石油和天然气输送用无缝挤压管和无缝挤压管 B345/B345米 . 注1: 在本规范中，术语的使用 合金 一般意义上包括铝以及铝合金。 注2: 拉制无缝管见规范 B210/B210米 ; 挤压管，规范 第221页 和 2.21亿美元 ; 冷凝器和热交换器用拉制无缝管规范 第234页 和 2.34亿美元 ; 带整体翅片的无缝冷凝器和热交换器管规范 B429/B429米 ; 通用拉拔管规范 B483/B483米 . 1.2 合金和回火名称符合ANSI H35.1/H35.1（M）。等效统一编号系统合金名称见表 4前面是A9，例如，根据实践，A91100表示铝1100 电子527 . 1.3 关于本规范中包含新铝和铝合金的验收标准，请参见 附件A2 . 1.4 以国际单位制或英磅单位表示的数值应单独视为标准值。 每个系统中规定的值可能不完全相等；因此，每个系统应独立使用。组合两个系统的值可能导致不符合标准。 1.4.1 SI单位显示在括号中或单独的表格中。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《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 2 covers aluminum and aluminum–alloy seamless pipe and seamless extruded round tube in the alloys and tempers shown in Table 1 [Table 2] intended for pressure applications. The standard sizes for seamless pipe are listed in Table 16.7 of ANSI H35.2 and H35.2(M). Nonstandard alloys, tempers, and sizes of pipe are produced as seamless extruded tube. Also included in this standard are seamless extruded pipe and seamless extruded tube for Oil & Gas Transmission previously covered under Specification B345/B345M . Note 1: Throughout this specification, use of the term alloy, in the general sense, includes aluminum as well as aluminum alloy. Note 2: For drawn seamless tubes, see Specification B210/B210M ; for extruded tubes, Specifications B221 and B221M ; for drawn seamless tubes for condensers and heat exchangers, Specifications B234 and B234M ; for seamless condenser and heat exchanger tubes with integral fins, Specification B429/B429M ; and for drawn tube for general purpose applications, Specification B483/B483M . 1.2 Alloy and temper designations are in accordance with ANSI H35.1/H35.1(M). The equivalent Unified Numbering System alloy designations are those of Table 4 preceded by A9, for example, A91100 for aluminum 1100 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 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 The SI units are shown either in brackets or in separate tables. 1.5 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.