1.1 本规范涵盖一般腐蚀应用的UNS N08367和UNS N08926焊接管。（尽管本规范对可能提供的管道尺寸没有限制，但商业惯例通常限制为公称直径不小于8英寸的尺寸。） 1.2 包括以下六类管道: 1.2.1 1级管道应通过在所有焊道中使用填充金属的工艺进行双面焊接，并应进行完全射线照相。 1.2.2 2级管道应通过在所有焊道中使用填充金属的工艺进行双面焊接。 不需要射线照相。 1.2.3 3级管道应通过在所有焊道中使用填充金属的工艺进行双面焊接，但内部根部焊缝可在不添加填充金属的情况下进行。焊缝应进行全面射线照相。 1.2.4 4级管道应通过在所有焊道中使用填充金属的工艺进行双面焊接，但内部根部焊缝可在不添加填充金属的情况下进行。不需要射线照相。 1.2.5 5级管道应通过在所有焊道中使用填充金属的工艺进行单焊，但暴露在管道内表面的焊道可在不添加填充金属的情况下进行。 焊缝应进行全面射线照相。 1.2.6 6级管道应通过在所有焊道中使用填充金属的工艺进行单焊，但暴露在管道内表面的焊道可在不添加填充金属的情况下进行。不需要射线照相。 1.3 以英寸磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 1.4 以下安全隐患警告仅适用于第节测试方法部分 13 ，本标准的: 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任熟悉所有危险，包括制造商提供的本产品/材料的适当安全数据表（SDS）中确定的危险，制定适当的安全、健康和环境实践，并在使用前确定监管限制的适用性。 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 UNS N08367 and UNS N08926 welded pipe for general corrosion applications. (Although no restrictions are placed on the sizes of pipe that may be furnished under this specification, commercial practice is commonly limited to sizes not less than 8 in. nominal diameter.) 1.2 Six classes of pipe are covered as follows: 1.2.1 Class 1 pipe shall be double welded by processes employing filler metal in all passes and shall be completely radiographed. 1.2.2 Class 2 pipe shall be double welded by processes employing filler metal in all passes. No radiography is required. 1.2.3 Class 3 pipe shall be double welded by processes employing filler metal in all passes except the inside root weld may be made without the addition of filler metal. Welds are to be completely radiographed. 1.2.4 Class 4 pipe shall be double welded by processes employing filler metal in all passes except the inside root weld may be made without the addition of filler metal. No radiography is required. 1.2.5 Class 5 pipe shall be single welded by processes employing filler metal in all passes except that the pass exposed to the inside pipe surface may be made without the addition of filler metal. Welds are to be completely radiographed. 1.2.6 Class 6 pipe shall be single welded by processes employing filler metal in all passes except that the pass exposed to the inside pipe surface may be made without the addition of filler metal. No radiography is required. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 The following safety hazards caveat pertains only to the test methods portion, Section 13 , of this standard: 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 become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use. 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.