標準號：ISO 20765-1-2005
中文標準名稱：天然氣.熱力學性質計算.第1部分:傳輸和分配設施的氣相特性
英文標準名稱：Natural gas - Calculation of thermodynamic properties - Part 1: Gas phase properties for transmission and distribution applications
標準類型：E24
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：E24
國際標準分類號：75.060
適用范圍：This part of ISO 20765 specifies a method of calculation for the volumetric and caloric properties of natural gases, natural gases containing synthetic admixture and similar mixtures, at conditions where the mixture can exist only as a gas. The method is applicable to pipeline-quality gases within the ranges of pressure, p, and temperature, T, at which transmission and distribution operations normally take place. For volumetric properties (compression factor and density), the uncertainty of calculation is about ±0,1 % (95% confidence interval). For caloric properties (for example enthalpy, heat capacity, Joule-Thomson coefficient, speed of sound), the uncertainty of calculation is usually greater.