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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 21446-2025 |
Measurement of Natural Gas Flow Using Standard Orifice Flow Meters {译} 用标准孔板流量计测量天然气流量 |
China National Standards Orifice |
 English PDF |
| GB/T 5275.6-2023 |
Gas analysis - Preparation of calibration gas mixtures by dynamic method - Part 6: Critical flow Orifice {译} 气体分析 动态法制备校准用混合气体 第6部分：临界流锐孔 |
China National Standards Orifice |
English PDF |
| GB/Z 35140-2017 |
Measurement of fluid flow by means of pressure-differential devices—Guidelines for the specification of Orifice plates, nozzles and Venturi tubes beyond the scope of GB/T 2624 用差压装置测量流体流量 GB/T 2624范围之外的孔板、喷嘴和文丘里管的使用指南 |
China National Standards Orifice |
English PDF |
| GB/T 5275.6-2014 |
Gas analysis―Preparation of calibration gas mixtures using dynamic volumetric methods―Part 6: Critical Orifices 气体分析 动态体积法制备校准用混合气体 第6部分：临界锐孔 |
China National Standards Orifice |
English PDF |
| GB/T 30209-2013 |
Aircraft―Gravity filling Orifices 飞机 重力加油口 |
China National Standards Orifice |
English PDF |
| GB/T 21446-2008 |
Measurement of natural gas flow by means of standard Orifice meter 用标准孔板流量计测量天然气流量 |
China National Standards Orifice |
English PDF |
| GB/T 2624.2-2006 |
Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 2: Orifice plates 用安装在圆形截面管道中的差压装置测量满管流体流量 第2部分：孔板 |
China National Standards Orifice |
English PDF |
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