『Verification Regulations for Turbine Flowmeters』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. JJG Speed Flow Meter Calibration Regulations JJG 198-1994 Speed Flow Meter Calibration Regulations have been replaced, and the current most important new standards are JJG 1029-200, JJG 1030-200, JJG 1033-2007, and JJG 1037-2008. 1. Overview of the original regulation. Regulation name: JJG 198-1994 "Verification Regulation for Velocity Flowmeters" Implementation date: December 1, 1994. Centralized and drafting units: China Academy of Metrology and Kaifeng Instrument Factory. Scope of application: Verification of velocity flow meters for newly manufactured, used, and repaired liquids and gases (including dry saturated vapor).
2. Current replacement standards. The original regulation has been divided into multiple subdivision technical standards, and the specific substitution relationship is as follows: • JJG 1029-2007: Verification Regulation for Vortex Flowmeters • JJG 1030-2007: Verification Regulation for Ultrasonic Flowmeters • JJG 1033-2007: Verification Regulation for Electromagnetic Flowmeters • JJG 1037-2008: Verification Regulation for Turbine Flowmeters. Regulations only cover brother 3 Applicable scenarios: Current standards correspond to different working principles of flow meters: • Liquid media: applicable for calibration of flow meters such as turbines and electromagnetic; • Gas media: applicable for calibration of flow meters such as vortex street and ultrasonic; • Special media: Saturated vapor measuring instruments need to be calibrated according to specific regulations.
2. How to install gas turbine flowmeter?
1. Transportation and turnover management before installation. According to JJG1037-2008 "Verification Regulations for Turbine Flowmeters", online flow meters m
Secondly, the installation position of the flange connection sealing gasket should be correct. Due to the limitations of the flowmeter installation conditions, some construction units use the method of making sealing gaskets on site with rubber sheets.
. In the production process, there have been incidents of non-standard and small inner holes, especially during the flange fastening process. The sealing gasket is not placed correctly, and the center of the inner hole deviates greatly from the axis of the pipeline flowmeter, causing the inner hole wall of the sealing gasket to block the ventilation pipe section of the pipeline flowmeter, resulting in changes in the direction of the flowmeter airflow, uneven force on the impeller, which can easily shorten the service life and reduce flow accuracy.III. The normal installation position for the relative distance between the gas filter and the flow meter is to directly install and connect the gas filter, valve, and flow meter in order.
. In actual construction, it is often seen that construction units install filters and flow meters with large intervals for convenience, resulting in connect
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