GB/T 2624.6-2024 Active

This document specifies the geometric dimensions of wedge devices and the method of installation in pipelines for measuring the flow rate of full-pipe fluids (installation and operating conditions).
Note 1: For specific application scenarios, the uncertainty of uncalibrated wedge devices is difficult to predict, so it is necessary to perform real-flow calibration in accordance with the provisions of Chapter 7.
This document specifies the calibration requirements. If applicable, they can be used within the calibrated Reynolds number range. Chapter 7 also provides guidance for the calibration of similar flowmeters outside the scope of this document.
This document also provides relevant information for calculating the flow rate and using it in conjunction with the requirements specified in ISO 5167-1:2022.
This document is only applicable to wedge devices that maintain subsonic flow throughout the entire measurement section and are single-phase fluids. Uncalibrated wedge devices can only be used within the specified pipe dimensions, pipe surface roughness, beta [given by Equation (2)] (or wedge ratio) and Reynolds number range. This document is not applicable to the measurement of pulsating flows. This document does not address the use of uncalibrated wedge devices in pipes with an inner diameter less than 50 mm or greater than 600 mm, or pipes with a Reynolds number (ReD) less than 1×104.
Note 2: A primary device of a wedge device consists of a wedge throttle component with specific geometric dimensions. There are also other types of wedge devices, but at the time of preparing this document, there was not enough data to adequately describe the characteristics of these devices, so these devices undergo real-flow calibration in accordance with Chapter 7.