GB/T 17213.8-2015 in English

《GB/T 17213.8-2015工业过程控制阀 第8-1部分：噪声的考虑 实验室内测量空气动力流流经控制阀产生的噪声》由TC124（全国工业过程测量控制和自动化标准化技术委员会）归口，TC124SC1（全国工业过程测量控制和自动化标准化技术委员会温度、流量、机械量、物位、显示仪表、执行器和结构装置分会）执行，主管部门为中国机械工业联合会。
GB/T 17213的本部分规定了在实验室内测量可压缩流体流经控制阀和/或附属管道装置(包括固定节流装置)时,由这些设备辐射出在空气中传播的声压级所使用的设备、测量方法和测量程序。
本部分不适用于直接向大气排放的控制阀。
方法A是测量可压缩流体流经控制阀和附属管道装置时产生噪声的一种统一方法。为方便使用者和制造厂,方法A允许比较各测量结果。噪声标准以试验用控制阀的声压级来表示。
方法B是在确定的工作条件下,测量管道系统内控制阀的上游和下游声压级的一种程序。由于消除了管道传输引起的误差,方法B更适用于评估控制阀的声学特性。
确定噪声特性有利于:
a)比较不同控制阀之间的性能;
b)采取措施消除噪声;
c)确定控制阀和阀组件的声学特性;
d)确定消声器的合适尺寸;e)确定对超声波流量计测量可能产生的不利影响。

Scope

This part of GB/T 17213 specifies the method used to measure the sound pressure level transmitted in the air radiated by these devices when compressible fluid flows through control devices and/or auxiliary piping devices (including fixed throttling devices) in the laboratory. Equipment measurement methods and measurement procedures. This part does not apply to control flashes that are discharged directly to the atmosphere. Method A is a unified method for measuring the noise generated by compressible fluids flowing through control and ancillary piping devices. For the convenience of users and manufacturers Method A allows the comparison of the measurement results. The noise standard is expressed by the sound pressure level of the control valve used in the test. Method B is a method for measuring the sound pressure level upstream and downstream of the control valve in the piping system under defined working conditions. procedure. The method is also more suitable for evaluating the acoustic characteristics of control valves since errors caused by pipeline transmission are eliminated. Determining the noise characteristics facilitates: a) comparing performance between different control flashes; b) taking steps to eliminate noise; c) determining Acoustic characteristics of control and valve assemblies; d) determination of suitable repellency for mufflers; e) determination of possible adverse effects on ultrasonic flowmeter measurements.