| BS 3156-11.1.1:1986* ISO 6974-1984 | Analysis of fuel gases. Methods for non-manufactured gases. Hydrocarbons and inert gases. Determination of hydrocarbons to C8 and inert gases by gas chromatography |
| BS 3156-11.1.2:1987* ISO 6975-1986 | Analysis of fuel gases. Methods for non-manufactured gases. Hydrocarbons and inert gases. Determination of hydrocarbons from butane (C4) to hexadecane (C16) by gas chromatography |
| BS 3156-11.2.1:1986* ISO 6570-1:1983 | Analysis of fuel gases. Methods for non-manufactured gases. Determination of potential hydrocarbon liquid content. General introduction |
| BS 3156-11.2.2:1986* ISO 6570-2:1984 | Analysis of fuel gases. Methods for non-manufactured gases. Determination of potential hydrocarbon liquid content. Weighing method |
| BS 3156-11.2.3:1986* ISO 6570-3:1984 | Analysis of fuel gases. Methods for non-manufactured gases. Determination of potential hydrocarbon liquid content. Volumetric method |
| BS 3156-11.4.1:1994* ISO 6326-1:1989 | Analysis of fuel gases. Methods for non-manufactured gases. Determination of sulfur compounds in natural gas. Introduction |
| BS 3156-11.4.2:1994* ISO 6326-2:1981 | Analysis of fuel gases. Methods for non-manufactured gases. Determination of sulfur compounds in natural gas. Odoriferous sulfur compounds by gas chromatography using an electrochemical detector |
| BS 3156-11.4.4:1994* ISO 6326-4:1994 | Analysis of fuel gases. Methods for non-manufactured gases. Determination of sulfur compounds in natural gas. Hydrogen sulfide, carbonyl sulfide, and sulfur-containing odorants by gas chromatography using a flame photometric detector |
| BS 7678:1993* ISO 6978:1992 | Method for determination of mercury in natural gas |
| BS 7859:1996* ISO 6976:1995 | Natural gas. Calculation of calorific values, density, relative density and Wobbe index from composition |
| BS EN ISO 10101-1:1998 | Natural gas. Determination of water by the Karl Fischer method. Introduction |
| BS EN ISO 10101-2:1998 | Natural gas. Determination of water by the Karl Fischer method. Titration procedure |
| BS EN ISO 10101-3:1998 | Natural gas. Determination of water by the Karl Fischer method. Coulometric procedure |
| BS EN ISO 10715:2001* BS 3156-11.0.1:2001 | Natural gas. Sampling guidelines |
| BS EN ISO 10723:2002 | Natural gas. Performance evaluation for on-line analytical systems |
| BS EN ISO 11541:2002 | Natural gas. Determination of water content at high pressure |
| BS EN ISO 12213-1:2005 | Natural gas. Calculation of compression factors. Introduction and guidelines |
| BS EN ISO 12213-2:2005 | Natural gas. Calculation of compression factors. Calculation using a molar-composition analysis |
| BS EN ISO 12213-3:2005 | Natural gas. Calculation of compression factor. Calculation using physical properties |
| BS EN ISO 13443:2005 | Natural gas. Standard reference conditions |
| BS EN ISO 13686:2005 | Natural gas. Quality designation |
| BS EN ISO 13734:2001 | Natural gas. Organic sulfur compounds used as odorants. Requirements and test methods |
| BS EN ISO 14111:1999* BS 3156-11.0.3:1999 | Natural gas. Guidelines to traceability in analysis |
| BS EN ISO 14532:2005 | Natural gas. Vocabulary |
| BS EN ISO 18453:2005 | Natural gas. Correlation between water content and water dew point |
| BS EN ISO 19739:2005 | Natural gas. Determination of sulfur compounds using gas chromatography |
| BS EN ISO 3830:1996* BS 2000-270:1996 | Petroleum products. Determination of lead content of gasoline. Iodine monochloride method |
| BS EN ISO 6326-3:1998* BS 3156-11.4.3:1994 | Natural gas. Determination of sulfur compounds. Determination of hydrogen sulfide, mercaptan sulfur, and carbonyl sulfide sulfur by potentiometry |
| BS EN ISO 6326-5:1998* BS 3156-11.4.5:1994 | Natural gas. Determination of sulfur compounds. Lingener combustion method |
| BS EN ISO 6570:2004 | Natural gas. Determination of potential hydrocarbon liquid content. Gravimetric methods |
| BS EN ISO 6974-1:2001 | Natural gas. Determination of composition with defined uncertainty by gas chromatography. Guidelines for tailored analysis |
| BS EN ISO 6974-2:2002 | Natural gas. Determination of composition with defined uncertainty by gas chromatography. Measuring-system characteristics and statistics for processing of data |
| BS EN ISO 6974-3:2001 | Natural gas. Determination of composition with defined uncertainty by gas chromatography. Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and hydrocarbons up to C8 using two packed columns |
| BS EN ISO 6974-4:2001 | Natural gas. Determination of composition with defined uncertainty by gas chromatography. Determination of nitrogen, carbon dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line measuring system using two columns |
| BS EN ISO 6974-5:2001 | Natural gas. Determination of composition with defined uncertainty by gas chromatography. Determination of nitrogen, carbon dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line process application using three columns |
| BS EN ISO 6975:2005 | Natural gas. Extended analysis. Gas chromatographic method |
| BS EN ISO 6976:2005 | Natural gas. Calculation of calorific values, density, relative density and Wobbe index from composition |
| BS EN ISO 6978-1:2005 | Natural gas. Determination of mercury. Sampling of mercury by chemisorption on iodine |
| BS EN ISO 6978-2:2005 | Natural gas. Determination of mercury. Sampling of mercury by amalgamation on gold/platinum alloy |
| BS EN ISO 8973:1999* BS 2000-432:1999 | Liquefied petroleum gases. Calculation method for density and vapour pressure |
| BS ISO 15403:2000 | Natural gas. Designation of the quality of natural gas for use as a compressed fuel for vehicles |
| BS ISO 23874:2006 | Natural gas. Gas chromatographic requirements for hydrocarbon dewpoint calculation |
| BS ISO 6974-6:2002 | Natural gas. Determination of composition with defined uncertainty by gas chromatography. Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and C1 to C8 hydrocarbons using three capillary columns |
| BS ISO 8943:2007 | Refrigerated light hydrocarbon fluids. Sampling of liquefied natural gas. Continuous and intermittent methods |
| BS ISO/TS 16922:2002 | Natural gas. Guidelines for odorizing gases |