GB/T 17747.3-1999 (English Version) PDF

Standard No.: GB/T 17747.3-1999
Language: Chinese, Available in English version
Release Date: 1999
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Status: Be replaced 2012-05
Replace By: GB/T 17747.3-2011
Latest: GB/T 17747.3-2011

Scope: This standard specifies the calculation method for the compressibility factor of natural gas, natural gas containing artificial admixtures and other similar mixtures only in the state of oxygen. The calculation method is to use the known high-level calorific value, relative density and CO₂ content and the corresponding pressure and temperature to calculate the compressibility factor of the gas. If H₂ is present, its content also needs to be known, as is often the case in gases containing artificial admixtures. Note 1: The compressibility factor can be calculated when any three variables in high calorific value, relative density, CO₂ content, and N₂ content are known. But N₂ input variable. The calculation method of one of the variables is not recommended. Generally, the first three variables are used as input variables for calculation. This calculation method is also called SGERG-88 calculation method, which is mainly applied to pipeline gas transmission within the range of pressure p and temperature T where gas transmission and distribution are normally carried out, and the uncertainty is about ±0.1%. It can also be used in a wider range, but the uncertainty of the calculation results will increase (see Appendix E). See GB/T 17747.1 for a more detailed description of the application range and application fields of this calculation method.

GB/T 17747.3-1999 history

2011 GB/T 17747.3-2011 Natural gas.Caculation of compression factor.Part 3: Caculation using physical properties
1999 GB/T 17747.3-1999 Natural gas--Calculation of compression factor--Part 3: Calculation using physical properties