在这种情况下，应使用流量孔板或配有差压变送器的其它差压元件。
In these cases orifice plates or other differential pressure producing elements with differential pressure transmitters shall be considered.
在涡流表或其它类型的仪表不适合的普通用途的流量测量，或要求冗余测量的地方，孔板是第二选择。
Orifice plates are the second choice for general duty flow measurement where vortex meters or other types of meters are not suitable or where redundant measurement is required.
橡胶杯膜电远传流量计，是配合节流元件（孔板）用来检测液体，气体和蒸汽的流量，并能自动显示和累积的仪表。
This flowmeter is a meter with automatic display and accumulation used for examining and measuring the flow of liquids, gases and steam with the aid of a throttle.
通过实验研究，观察分析了流量测量管路中空间弯头下游有(或无)整流器时对孔板流量计流量系数的影响。
The flow coefficients of the orifice-plate flowmeters are experimentally studied with or without a rectifier at the lower reach of a space elbow in the measuring pipe of flow.
结果是：有整流器时的孔板流量系数均比无整流器时的孔板流量系数稳定且波动小。
The results show that the flow coefficients of the orifice-plates with a rectifier are more stable and have less fluctuation than those without a rectifier.
对于天然气计量用的智能孔板流量积算仪，流量的计算方法对计量结果有非常重要的意义。
The method of measuring is important to the measurement of natural gas flux for an intelligent orifice plate flow totalizer.
介绍了孔板测量流量方法的工作原理。
The working principle of the orifice-plate measuring method of flow quantity was introduced.
孔板流量计常用于工业生产测量气体、液体和蒸汽流量。
At present it was widely applied to measure the flux of gas, liquid and steam.
天然气计量现在仍以差压式流量计中的孔板流量计为主。
The metering of natural gas still presently depends on orifice flowmeter, one of differential pressure flowmeters.
在工业上广泛使用孔板流量计测量气体体积流量。
It has been widely accepted by the industry for measuring gas volumes.
可行时，液体物料应该用经过正确校验的立管来检测储罐或用孔板流量计、转子流量计或容积式流量计来测量；
Wherever practical the measurement of liquid streams shall be by standing gauges of properly calibrated tanks or by orifice meters, rotameters or displacement meters.
与孔板流量计相比，具有结构简单，安装、维护方便，测量范围宽等特点。
Comparing with orifice flowmeter, it features simple structure, ease installation and maintenance as well as wide range.
建立了由锅炉、换热器、孔板流量计、水泵、微压计、温度计等仪器设备组成的封闭式冷却塔实验台。
Bench of closed circuit cooling tower that is composed of boiler, exchanger, orifice flowmeter, water pump, micromanometer, heat indicator and so on is established.
实验结果表明槽式孔板测量误差小于5%，研究结果对槽式孔板流量计的开发具有一定借鉴意义。
Experimental results indicated that maximum error of slotted orifice is less than 5%. The conclusion is available to the development of slotted orifice meter.
介绍了孔板、涡街流量计测量不同流体时引起的能耗量的计算方法，举例说明了能耗量的大小。
The paper introduces calculating method of energy consumpation caused by flowmeters, such as orifice flow meter, vortex flow meter, and illustrates magnitude of energy consumpation with examples.
文章分析了孔板的开孔率对管路最大流量、孔板前压力、孔板后压力和孔板前后压差等的影响。
The paper analyzed the influence of the orifice ratio on maximum discharge, the inlet pressure, outlet pressure, differential pressure, ect.
用该方法设计的线性化器具有一定的通用性，可以构成热电偶、热电阻温度计以及孔板流量计。
The linearization apparatus designed by this method is in common use. It can be used in thermocouple and resistance thermometers as well as flowmeters by means of orifice plates.
目前，孔板流量计仍是最主要的天然气流量计。
分析了可逆式孔板流量计和可变式孔板流量计的设计原理和实验结果。
The design element and the experiment result of reversible orifices and changing orifices low velocity flow is high.
通常情况下采用孔板节流、测量气体流量。
An orifice plate is often used to restrict and measure gas flow.
孔板流量计是测量气体流量最常用的方法。
The most commonly used method for measurement of gas is the orifice meter.
并应用音速喷咀对涡轮流量计、腰轮流量计和密度补偿式孔板气体质量流量计进行标定。
The sonic nozzle is used to calibrate turbine flowmeters, Roots flowmeters, and density compensated orifice gas mass flowmeters.
通过实验与工业用基本型封头对比，结果表明错排孔板型封头能够明显地改善换热器出口截面流量和温度分布的不均匀性。
Compared with the ordinary header, the experimental results show that staggered perforated plate header greatly improves the distribution of outlet flow and outlet temperature.
阐述了孔板流量计的流量测量原理以及理论流量计算公式、标准孔板的结构形式和技术要求。
Then, its measurement principle and theoretical formula, as well as the structural style and technical requirements of standard orifice were expounded.
本文主要分析了ZKL智能孔板流量计测量流量时影响测量精度的主要因素。
An analysis is made in the paper of the factors affecting the accuracy of the ZKL intelligent orifice plate flowmeter in flow measurement.
在采用标准孔板节流装置测量天然气流量时，盖压波动对测量精度影响甚大。
The differential pressure fluctuation has a quite great influence upon the measure precision in measuring natural gas flow rate with the measuring device by use of standard orifice plate.
传统孔板流量计测量精度较低，功耗较高。
Traditional orifice plate flowmeter had some demerits such as low measuring precision and high power dissipation.
传统孔板流量计测量精度较低，功耗较高。
Traditional orifice plate flowmeter had some demerits such as low measuring precision and high power dissipation.
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