自1922年以来，ASME一直在定义管道安全。ASME B31。9包含工业、机构、商业和公共建筑以及多单元住宅中的管道规则，不要求B31中涵盖的尺寸、压力和温度范围。1.ASME B31。9规定了建筑设施管道系统的设计、材料、制造、安装、检查、检查和测试要求。包括建筑物内或物业范围内的管道系统。它与美国机械工程师协会（ASME）管理建筑和建筑行业的许多其他安全标准相结合，包括A17系列电梯和自动扶梯；B30系列起重机、起重机和升降机；以及A112系列的管道系统。B31。9还可作为ASME的配套文件？s管道系统上的其他B31代码。总之，它们仍然是任何从事管道工作的人必不可少的参考资料。本修订版的主要变化包括在表I中增加了（奥氏体）不锈钢的容许应力- 仔细应用这些B31规范将有助于用户遵守其管辖范围内的适用法规，同时实现从这些卷中详述的许多行业最佳实践中获得的运营、成本和安全效益。适用于工业、机构、商业和公共建筑管道的设计师、业主、监管机构、检查员和制造商。

ASME has been defining piping safety since 1922.ASME B31.9 contains rules for the piping in industrial, institutional, commercial, and public buildings, and multi-unit residences, which does not require the range of sizes, pressures, and temperatures covered in B31.1. ASME B31.9 prescribes requirements for the design, materials, fabrication, installation, inspection, examination, and testing of piping systems for building services. It includes piping systems in the building or within the property limits.It joins with ASME's many other safety standards governing the building and construction industry, including the A17 series on elevators and escalators; the B30 series on cranes, hoists and lifts; and the A112 series on plumbing. B31.9 also serves as a companion to ASME?s other B31 codes on piping systems. Together, they remain essential references for anyone engaged with piping.Key changes to this revision include the addition of allowable stresses for (austenitic) stainless steels to TableI-1, and revisions to references in Mandatory Appendix III.Careful application of these B31 codes will help users to comply with applicable regulations within their jurisdictions, while achieving the operational, cost and safety benefits to be gained from the many industry best-practices detailed within these volumes.Intended for designers, owners, regulators, inspectors, and manufacturers of industrial, institutional, commercial, and public building pipelines.