Natural gas flow meter selection skills to understand
2021-07-05
In the face of so many varieties of natural gas flowmeters, the selection of general users has become a problem. How to scientifically and objectively select a more suitable flowmeter is a problem that needs attention. We believe that the selection should follow the appropriate rules, try to avoid the misleading propaganda of manufacturers, according to the actual situation, in the normal operation of the gas monitoring system to find a suitable natural gas flowmeter, it is the ideal natural gas flowmeter.
Natural gas flow meter selection can be carried out according to five aspects: instrument performance, fluid characteristics, installation conditions, environmental conditions and economic factors. Various considerations are as follows:
1.instrument performance: degree, repeatability, linearity, range, pressure loss, upper and lower limit flow, signal output characteristics, response time, etc.;
2.installation conditions: pipeline layout direction, flow direction, upstream and downstream pipeline length, pipeline caliber, maintenance space, pipeline vibration, grounding, power supply, auxiliary equipment (filtration, sewage), explosion-proof, etc.;
3.environmental conditions: ambient temperature, humidity, safety, electromagnetic interference, etc.;
4. Economic factors: purchase cost, installation cost, maintenance cost, calibration cost, service life, operation cost (energy consumption), spare parts, etc.
Natural gas flowmeter selection steps are as follows:
1. Primary available instrument types according to five factors;
2.use the elimination method to select 2 to 3 types in the comparison, discharge the order;
3.again according to the five aspects of careful evaluation, and then eliminated to a type of instrument.
Whether the selection of natural gas flowmeters can be successful largely depends on the selection personnel's exact understanding of the performance quality of the instrument and the characteristics of the measurement object. For the performance and quality of the instrument, special attention should be paid to the manufacturer's false publicity and misleading ingredients. The exact understanding of the measurement object is very important, not the user has an accurate understanding of their own measurement object, many selection failures are caused by inaccurate parameters. Some object properties require deep investigation to figure out. The development of gas engineering has promoted the economic development of our country, and is of positive significance to the stable development of our country and society.
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