This Standard specifies the chemical analysis methods of general components and special components, and the testing methods of the calorific value and the specific gravity of the fuel gas and the natural gas; however, it is not applicable to the liquefied petroleum gas and the liquefied natural gas.
The contents of this specification shall be applicable from July 31st, 2008.
NOTE : The International Standards corresponding to this Standard are as follows.
ISO 6326-1:1989 Natural gas—Determination of sulfur compounds— Part 1: General introduction
ISO 6327 :1981 Gas analysis—Determination of the water dew point of natural gas—Cooled surface condensation hygrometers
ISO 6974-1: 2000 Natural gas—Determination of composition with defined uncertainty by gas chromatography—Part 1: Guidelines for tailored analysis
ISO 6974-2:2001 Natural gas—Determination of composition with defined uncertainty by gas chromatography—Part 2: Measuring-system characteristics and statistics for processing of data
ISO 6974-3:2000 Natural gas—Determination of composition with defined uncertainty by gas chromatography—Part 3: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and hydrocarbons up to C8 using two packed columnsISO 6974-4:2000 Natural gas—Determination of composition with defined uncertainty by gas chromatography—Part 4: Determination of nitrogen, carbon dioxide and CI to C5 and C6+ hydrocarbons for a laboratory and on-line measuring system using two columns
ISO 6974-5:2000 Natural gas—Determination of composition with defined uncertainty by gas chromatography—Part 5: Determination of nitrogen, carbon dioxide and CI to C5 and C6+ hydrocarbons for a laboratory and on-line process application using three columns
ISO 6974-6:2002 Natural gas—Determination of composition with defined uncertainty by gas chromatography—Part 6: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and CI to C8 hydrocarbons using three capillary columns
ISO 6975 :1997 Natural gas—Extended analysis—Gas-chromatographic method
ISO 6976:1995 Natural gas—Calculation of calorific values, density, relative density and Wobbe index from composition
(Overall evaluation: MOD)
In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standards and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/ IEC Guide 21.
Notes 11 The liquefied petroleum gas means the liquefied fuel gas or industrial source gas of which the main component is propane, propylene, butane or butylene (see "JIS K 2240X
21 The liquefied natural gas means the natural gas of the liquefied state.