1.1 本规范涵盖了一组要求，除非在单独的规范中另有规定，否则应适用于下面提到的ASTM产品规范。 质量标准标题 ASTM 名称 A 无缝碳钼合金钢锅炉及 过热器管 A209/A209M 无缝铁素体和奥氏体合金钢锅炉、过热器， 和热交换器管 A213/A213M 焊接奥氏体钢锅炉、过热器、热交换器， 和冷凝管 A249/A249M 电阻焊铁素体合金钢锅炉及 过热器管 A250/A250M 无缝和焊接铁素体和马氏体不锈钢 通用管路 A268/A268M 无缝和焊接奥氏体不锈钢管 一般事务 A269/A269M 无缝和焊接奥氏体和铁素体/奥氏体 不锈钢卫生管 A270/A270M 无缝和焊接碳钢和合金钢管 低温服务 A334/A334M 焊接奥氏体不锈钢给水加热器管 A688/A688M 增殖反应堆堆芯用奥氏体不锈钢管 组件 A771/A771M 无缝和焊接铁素体/奥氏体不锈钢管 一般事务 A789/A789M 无缝和焊接铁素体不锈钢给水加热器 管子 A803/A803M 无缝奥氏体和马氏体不锈钢管道 液态金属冷却反应堆堆芯部件用管 A826/A826M 高频感应焊接，未退火，奥氏体 钢制冷凝管 A851 焊接奥氏体合金钢锅炉、过热器、冷凝器、 和具有纹理表面的热交换器管 A1098/A1098M 1.2 如果产品规范的要求与本通用要求规范的要求发生冲突，应以产品规范为准。如果产品规范的要求或本通用要求规范的要求与采购订单中更严格的要求发生冲突，则以采购订单为准。 1.3 以SI单位或英寸-磅单位表示的值应单独视为标准值。在正文中，国际单位制单位显示在括号中。每个系统中陈述的值可能不完全等同；因此，每个系统应独立使用。合并两个系统的值可能导致不符合标准。除非订单中指定了产品规格的“M”名称（SI），否则应适用英寸-磅单位。 1.4 本国际标准是根据世界贸易组织发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的技术性贸易壁垒委员会。

1.1 This specification covers a group of requirements that, unless otherwise specified in an individual specification, shall apply to the ASTM product specifications noted below. Title of Specification ASTM Designation A Seamless Carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes A209/A209M Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes A213/A213M Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes A249/A249M Electric-Resistance-Welded Ferritic Alloy-Steel Boiler and Superheater Tubes A250/A250M Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service A268/A268M Seamless and Welded Austenitic Stainless Steel Tubing for General Service A269/A269M Seamless and Welded Austenitic and Ferritic/Austenitic Stainless Steel Sanitary Tubing A270/A270M Seamless and Welded Carbon and Alloy-Steel Tubes for Low-Temperature Service A334/A334M Welded Austenitic Stainless Steel Feedwater Heater Tubes A688/A688M Austenitic Stainless Steel Tubing for Breeder Reactor Core Components A771/A771M Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service A789/A789M Seamless and Welded Ferritic Stainless Steel Feedwater Heater Tubes A803/A803M Seamless Austenitic and Martensitic Stainless Steel Duct Tubes for Liquid Metal-Cooled Reactor Core Components A826/A826M High-Frequency Induction Welded, Unannealed, Austenitic Steel Condenser Tubes A851 Welded Austenitic Alloy Steel Boiler, Superheater, Condenser, and Heat Exchanger Tubes with Textured Surface(s) A1098/A1098M 1.2 In the case of conflict between a requirement of a product specification and a requirement of this general requirements specification, the product specification shall prevail. In the case of conflict between a requirement of the product specification or a requirement of this general requirements specification and a more stringent requirement of the purchase order, the purchase order shall prevail. 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. 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. The inch-pound units shall apply unless the “M” designation (SI) of the product specification is specified in the order. 1.4 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.