1.1 本规程涵盖了流量调节器，该流量调节器可为尺寸为1-60英寸的圆形管道的液相和气相流体流生成充分发展的流量剖面。（25.4-1525 mm）直径和雷诺数（Re）范围从过渡（100）到100 000 这些流量调节器可用于任何类型的流量计或开发用于其他用途的充分开发的流量剖面。 1.2 本文所述的流量调节器参考了使用基本筛网理论推导的中心单孔配置。 1.3 流量调节器上游和下游的管道长度被视为流量调节器的关键部件，并构成完整的流量调节器系统。 1.4 以英寸-磅为单位的数值应视为标准值。 括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 流量调节器用于调节气体或液体的湍流流动轮廓，以减少管道弯头、管道长度、阀门、三通、，以及其他此类设备或管道配置，这些设备或管道配置将影响流量计的读数，从而导致测量误差，因为气体或液体的流量剖面在测量点处没有充分发展的流量剖面。 4.

1.1 This practice covers flow conditioners that produce a fully developed flow profile for liquid and gas phase fluid flow for circular duct sizes 1- to 60-in. (25.4- to 1525-mm) diameter and Reynolds Number (Re) ranges from transition (100) to 100 000 000. These flow conditioners can be used for any type of flow meter or development of a fully developed flow profile for other uses. 1.2 The central single-hole configuration that is derived using fundamental screen theory is referenced as the flow conditioner described herein. 1.3 Piping lengths upstream and downstream of a flow conditioner are considered a critical component of a flow conditioner and constitute the complete flow conditioner system. 1.4 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. 1.5 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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 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. ====== Significance And Use ====== 4.1 Flow conditioners are used for the conditioning of the turbulent flow profile of gases or liquids to reduce the ADD (velocity profile distortion) DEL (turbulence), swirl, or irregularities caused by the installation effects of piping elbows, length of pipe, valves, tees, and other such equipment or piping configurations that will affect the reading of flow measurement meters thus inducing measurement errors as a result of the flow profile of the gas or liquid not having a fully developed flow profile at the measurement point. 4