GB/T 38523-2020 in English
VALIDPreparation of gas mixtures—Manometric method
- Issued on:2020-03-06
- Implemented on:2021-02-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$185.00
《GB/T 38523-2020混合气体的制备 压力法》由TC206（全国气体标准化技术委员会）归口，TC206SC2（全国气体标准化技术委员会混合气体分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
Analysis of the core content of the standard
This standard specifies the full-process technical requirements for the preparation of mixed gases by the pressure method, with the focus on:
- Preparation system construction specifications (gas control valves, pressure measuring equipment, etc.)
- Compressibility factor correction calculation method
- Special handling requirements for liquefied gas components
Key technology comparison
| Technical elements | Ideal gas | Real gas |
|---|---|---|
| Equation of state | pV=nRT | pV=ZnRT |
| Compression factor Z | Z=1 | Z=f(Tr,pr) |
| Mole fraction calculation | xi=pi/pm | xi=(pi·Zm)/(pm·Zi) |
Key points for safe implementation
Typical case: When preparing a mixture of 18.1% carbon dioxide in argon:
- The initial calculated pressure was 2.34MPa with a deviation of 5.59%
- The pressure was reduced to 2.27MPa after adjustment by the correction factor e=1.03
- The final preparation deviation was controlled within ±2%
Background of standard evolution
This standard replaces GB/T14070-1993. The main upgrade contents are:
- Added requirements for cluster gas preparation
- Detailed specifications for liquefied gas component processing
- Introduced a dynamic correction mechanism for compression factor
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