应行业和政府的要求，ASME自1922年以来一直在定义管道安全。本标准涵盖了直通阀的面对面和端到端尺寸，以及角阀的中心到面和中心到端尺寸。其目的是确保给定材料、类型、尺寸、额定等级和端部连接的阀门的安装互换性。本标准将与ASME B16系列标准其他卷中描述的设备以及其他ASME标准（如锅炉和压力容器规范和B31管道规范）一起使用。仔细应用这些B16标准将帮助用户遵守其管辖范围内的适用法规，同时从这些卷中详述的许多行业最佳实践中获得操作、成本和安全效益。适用于制造商、所有者、雇主、用户和其他与压力设备阀门的规格、购买、维护、培训和安全使用有关的人员，以及所有潜在的管理实体。

Upon request from industry and government, ASME has been defining piping safety since 1922.This Standard covers face-to-face and end-to-end dimensions of straightway valves, and center-to-face and center-to-end dimensions of angle valves. Its purpose is to assure installation interchangeability for valves of a given material, type, size, rating class, and end connection.This Standard is to be used in conjunction with equipment described in other volumes of the ASME B16 series of standards as well as with other ASME standards, such as the Boiler and Pressure Vessel Code and the B31 Piping Codes.Careful application of these B16 standards 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 manufacturers, owners, employers, users and others concerned with the specification, buying, maintenance, training and safe use of valves with pressure equipment, plus all potential governing entities.