AGA XQ0103 : 2001

Disclaimers and Copyright
Foreword
Acknowledgements
Table of Contents
1 Introduction
  1.1 Purpose
  1.2 Scope
2 Definitions
3 Gas Measurement Units
  3.1 Terminology/Units
  3.2 Energy Measurement
  3.3 Volumetric Measurement
  3.4 Mass Measurement
4 Quality of Gas - Discussion
  4.1 Composition of Natural Gas
      4.1.1 Other Hydrocarbons
      4.1.2 Diluent Gases
      4.1.3 Water Content
  4.2 Quality Specifications
      4.2.1 Table of Gas Properties
      4.2.2 Odorization and safe use of natural gas
  4.3 Higher and Lower Heating Value
  4.4 Effects on Natural Gas Facilities & Processes
      4.4.1 Distribution Systems
      4.4.2 Transmission Pipelines
      4.4.3 Underground Storage
      4.4.4 LNG Peakshaving
      4.4.5 Gas Accounting
  4.5 Effects on Natural Gas End Users
      4.5.1 Residential End Users
      4.5.2 Commercial End Users
      4.5.3 Industrial End Users
      4.5.4 Natural Gas Vehicles
5 Checklists for a Contract Measurement Clause
  5.1 Introduction
  5.2 Construction of Facilities
  5.3 Operations and Maintenance
  5.4 Adherence to Specifications
  5.5 Future Equipment
  5.6 Electrical Specifications
  5.7 Meter Facilities
  5.8 Measurement Basis
6 Checklists for a Contract Quality Clause
  6.1 Natural Gas
  6.2 Heating Value
  6.3 Quality Specifications
  6.4 Base Conditions
  6.5 Odorization
  6.6 Failure to Conform
7 Reference List
APPENDIX A
  Derivation of Joule Given Btu,T
APPENDIX B
  Sample Contract Measurement Clause
APPENDIX C
  Sample Contract Quality Clause
FORM FOR PROPOSALS ON AGA REPORT NO. 4A

Provides guideline for writing new contracts and updating existing contracts. Offers general definitions and criteria for specifying the volumetric, heating value, energy content, and quality measurements of natural gas.