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BS ISO 15971 : 2008

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

NATURAL GAS - MEASUREMENT OF PROPERTIES - CALORIFIC VALUE AND WOBBE INDEX
Available format(s)

Hardcopy , PDF

Superseded date

05-31-2014

Language(s)

English

Published date

01-01-2008

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
   3.1 Calorific value and Wobbe index
   3.2 Water content of gas
   3.3 Performance classification
   3.4 Terms from metrology
4 Principles of measurement
   4.1 Introduction
   4.2 Direct combustion calorimetry
   4.3 Indirect methods
   4.4 Inferential methods
5 Performance assessment and acceptance tests
   5.1 Performance assessment for instrument selection
   5.2 Factory and site acceptance tests
6 Sampling and installation guidelines
   6.1 Sampling
   6.2 Installation guidelines
7 Calibration
   7.1 Calibration procedures
   7.2 Calibration gases
8 Verification
   8.1 Verification procedures
   8.2 Verification gases
9 Maintenance
   9.1 Preventive maintenance
   9.2 Corrective maintenance
10 Quality control
   10.1 General
   10.2 Environmental parameters and ancillary equipment
   10.3 Instrumental factors
Annex A (normative) - Symbols and units
Annex B (informative) - Examples of type-approval and technical
        specifications
Annex C (informative) - Class 0 mass-basis calorimetry
Annex D (informative) - Direct combustion calorimetry
Annex E (informative) - Stoichiometric combustion devices
Annex F (informative) - Effect of non-alkane gases on stoichiometric
        combustion devices
Annex G (informative) - Measurement of Wobbe index
Bibliography

Specifies the measurement of calorific value of natural gas and natural gas substitutes by non-separative methods, i.e. methods that do not involve the determination of the gas composition, nor calculations from it.

Committee
PTI/15
DevelopmentNote
Renumbered and superseded by BS EN ISO 15971. (05/2014)
DocumentType
Standard
Pages
62
PublisherName
British Standards Institution
Status
Superseded
SupersededBy

ISO 10715:1997 Natural gas — Sampling guidelines
IEC 61000-6-4:2006+AMD1:2010 CSV ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 6-4: GENERIC STANDARDS - EMISSION STANDARD FOR INDUSTRIAL ENVIRONMENTS
ISO 6976:2016 Natural gas — Calculation of calorific values, density, relative density and Wobbe indices from composition
ISO/IEC Guide 98:1993 Guide to the expression of uncertainty in measurement (GUM)
IEC 61000-6-1 : 3.0 ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 6-1: GENERIC STANDARDS - IMMUNITY STANDARD FOR RESIDENTIAL, COMMERCIAL AND LIGHT-INDUSTRIAL ENVIRONMENTS
ISO 5725-6:1994 Accuracy (trueness and precision) of measurement methods and results — Part 6: Use in practice of accuracy values
IEC 61000-6-3:2006+AMD1:2010 CSV Electromagnetic compatibility (EMC) - Part 6-3: Generic standards - Emission standard for residential, commercial and light-industrial environments
ISO 14532:2014 Natural gas — Vocabulary
ISO 13443:1996 Natural gas Standard reference conditions
ISO 6142:2001 Gas analysis Preparation of calibration gas mixtures Gravimetric method
ISO 14111:1997 Natural gas — Guidelines to traceability in analysis
ISO 6145-1:2003 Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 1: Methods of calibration
IEC 61000-6-2 : 3.0:2016 ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 6-2: GENERIC STANDARDS - IMMUNITY STANDARD FOR INDUSTRIAL ENVIRONMENTS

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