1.1 本规范涵盖了一组通用要求，适用于以下任何单个产品规范或引用本规范或其部分的任何其他ASTM规范中涵盖的锻钢管道配件: 规范标题 ASTM 任命 锻造管道配件规范 中碳钢和合金钢 高温服务 A234/A234M 锻造奥氏体不锈钢规范 钢制管道配件 A403/A403米 锻碳管道配件规范 低温用钢和合金钢 A420/A420米 锻制碳钢对接焊规范 提高缺口韧性的管道配件 758米/758米 焊接态锻造奥氏体规范 一般腐蚀性不锈钢配件 低温和中等温度下的服务 774米/774米 锻造铁素体、铁素体/奥氏体钢规范， 马氏体不锈钢管道配件 A815/A815米 热处理碳钢规范 低温和腐蚀性环境用配件 A858/A858米 锻造高强度规范 铁素体钢对焊配件 A860/A860米 1.2 如果单个产品规范的要求与本通用要求规范的要求存在冲突，则应以单个产品规范中的要求为准。 1.3 通过买方和供应商之间的共同协议，可以规定额外的要求（见 4.1.8 ). 任何此类附加要求的接受应取决于与供应商的谈判，并且必须包含在买方和供应商商定的订单中。 1.4 以国际单位制或英寸-磅单位表示的值应单独视为标准值。在文本和表格中，国际单位制显示在括号中。 每个系统中所述的值可能不是完全等效的；因此，每个系统都应独立使用。结合两个系统的值可能会导致不符合规范。除非订单中规定了产品规格的“M”名称[SI]，否则应采用英寸-磅单位。 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》中确立的国际公认的标准化原则制定的。

1.1 This specification covers a group of common requirements that shall apply to wrought steel piping fittings covered in any of the following individual product specifications or any other ASTM specification that invokes this specification or portions thereof: Title of Specification ASTM Designation Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service A234/A234M Specification for Wrought Austenitic Stainless Steel Piping Fittings A403/A403M Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service A420/A420M Specification for Wrought-Carbon Steel Butt-Welding Piping Fittings with Improved Notch Toughness A758/A758M Specification for As-Welded Wrought Austenitic Stainless Steel Fittings for General Corrosive Service at Low and Moderate Temperatures A774/A774M Specification for Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings A815/A815M Specification for Heat-Treated Carbon Steel Fittings for Low-Temperature and Corrosive Service A858/A858M Specification for Wrought High-Strength Ferritic Steel Butt-Welding Fittings A860/A860M 1.2 In case of conflict between a requirement of the individual product specification and a requirement of this general requirement specification, the requirements of the individual product specification shall prevail over those of this specification. 1.3 By mutual agreement between the purchaser and the supplier, additional requirements may be specified (See 4.1.8 ). The acceptance of any such additional requirements shall be dependent on negotiations with the supplier and must be included in the order as agreed upon by the purchaser and supplier. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text and the tables, 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 specification. The inch-pound units shall apply unless the “M” designation [SI] of the product specification is specified in the order. 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.