GB/T 2624.3-2006
Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 3: Nozzles and Venturi nozzles (English Version)

Standard No.

GB/T 2624.3-2006

Language

Chinese, Available in English version

Release Date

2006

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 2624.3-2006

Replace

GB/T 2624-1993

Scope

This part of GB/T 2624 specifies the geometric dimensions of nozzles and Venturi nozzles and the method of use (installation and working conditions) for measuring full pipe fluid flow when installed in pipelines. This part of GB/T 2624 also provides relevant information for calculating the flow rate and can be used together with the requirements specified in GB/T 2624.1. This part of GB/T 2624 applies to nozzles and Venturi nozzles where the fluid maintains a subsonic flow throughout the measurement section and can be considered as a single-phase flow. In addition, each device can only be used for specified pipe sizes and Reynolds numbers. This section does not apply to the measurement of pulsating flow. This section does not deal with the use of nozzles and venturi nozzles in pipes with dimensions smaller than 50 mm or larger than 630 mm, or pipes with Reynolds numbers below 10,000. This part of GB/T 2624 deals with a) two types of standard nozzles: 1) ISA 1932 nozzles; 2) long-diameter nozzles ⁵⁾. b) Venturi nozzle. These two types of standard nozzles are very different, so this section describes them separately. The upstream end face of the Venturi nozzle is the same as the ISA 1932 nozzle, but it has a diverging section, so the location of the downstream pressure tap is different, so it is described separately. This construction has lower pressure loss than similar nozzles. Both standard nozzles and Venturi nozzles have been directly calibrated. The quantity, distribution and quality of the experiments are sufficient to ensure that the relevant application system can be based on the calibration experiment results and coefficients with certain predictable uncertainty limits.

GB/T 2624.3-2006 Referenced Document

• GB/T 17611-1998 Measurement of fluid flow in closed conduits--Vocabulary and symbols
• GB/T 2624.1-2006 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 1: General principles and requirements

GB/T 2624.3-2006 history

• 2006 GB/T 2624.1-2006 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 1: General principles and requirements
• 1993 GB/T 2624-1993 Measurement of fluid flow by means of orifice plates,nozzles and Venturi tubes inserted in circular cross-section conduits running full

GB/T 2624.3-2006 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 3: Nozzles and Venturi nozzles has been changed from GB/T 2624-1993 Measurement of fluid flow by means of orifice plates,nozzles and Venturi tubes inserted in circular cross-section conduits running full.

GB/T 2624.3-2006 -All Parts