1.1 本规范涵盖了直缝和螺旋对接焊缝焊接的未退火奥氏体不锈钢管产品，适用于中低温和腐蚀性环境，在这些环境中，不需要热处理来提高耐腐蚀性。 表1 列出了本规范涵盖的五个等级。本规范的用户应该意识到，基本产品需要最低限度的测试和检查。需要额外测试或检查的用户请参阅补充要求或订购信息，或两者兼而有之。需要进行焊后热处理或射线照相检查的管状产品的用户请参阅规范 A312/A312M , A358/A358米 ，或 A409/A409M ，如适用。 1.2 本规范涵盖了根据本规范生产的外径为3英寸[75毫米]至48英寸[1200毫米]、标称壁厚为0.062英寸[1.57毫米]至0.500英寸[12.70毫米]的焊接未退火管状产品。如果符合本规范的所有其他要求，则可以提供具有其他直径或壁厚或两者兼具的管状产品。 1.3 以英寸-磅单位或国际单位表示的值应单独视为标准值。在文本中，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。将两个系统的值结合起来可能会导致不符合标准。 除非订单中指定了本规范的“M”名称，否则应采用英寸-磅单位。 1.4 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 straight seam and spiral butt seam welded unannealed austenitic stainless steel tubular products intended for low and moderate temperatures and corrosive service where heat treatment is not necessary for corrosion resistance. Table 1 lists the five grades covered by this specification. The user of this specification should be aware that a minimum amount of testing and examination is required of the basic product. The user requiring additional testing or examination is referred to the supplemental requirements or Ordering Information, or both. Users requiring a tubular product with post-weld heat treatment or with radiographic examination are referred to Specification A312/A312M , A358/A358M , or A409/A409M , as applicable. 1.2 This specification covers welded unannealed tubular products 3 in. [75 mm] through 48 in. [1200 mm] in outside diameter and in nominal wall thicknesses of 0.062 in. [1.57 mm] through 0.500 in. [12.70 mm] produced to this specification. Tubular products having other diameters or wall thickness, or both, may be furnished provided it complies with all other requirements of this specification. 1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, 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 the values from the two systems may result in non-conformance with the standard. The inch-pound units shall apply unless the “M” designation of this 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.