ISO TR 29922-2017 PDF

Full title and description

ISO/TR 29922:2017 — Natural gas — Supporting information on the calculation of physical properties according to ISO 6976. This technical report collects technical background, derivations, worked examples and supplementary data that justify and explain the computational methods given in ISO 6976:2016, but that are not required for routine implementation of the main standard.

Abstract

ISO/TR 29922:2017 acts as a repository for the manifold technical details which justify and explain the methods presented in the third edition of ISO 6976. Each main clause addresses a specific aspect of the calculational method described in ISO 6976:2016 and is intended to be essentially self‑sufficient and independent of the others, providing derivations, clarifications and supplementary information to support correct implementation.

General information

• Status: Published.
• Publication date: 3 March 2017 (2017-03-03).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 75.060 (Natural gas).
• Edition / version: Edition 1 (2017).
• Number of pages: 103 pages.

Scope

The report provides supporting technical information for the calculation methods specified in ISO 6976:2016 (calculation of calorific values, density, relative density and Wobbe indices from composition). It is intended for readers who need detailed justification, derivations, numerical details, uncertainty considerations and worked examples that underpin the ISO 6976 computation algorithms, rather than for everyday routine use. Each clause is largely self‑contained so users can consult the specific topics relevant to their application.

Key topics and requirements

• Detailed derivations and theoretical background for the calculation methods used in ISO 6976:2016 (calorific values, density, relative density, Wobbe indices).
• Numerical methods, worked examples and explanatory notes to support implementation and verification of calculation routines.
• Treatment and estimation of uncertainties associated with calculated properties.
• Supplementary tables, auxiliary constants and references used to derive values in ISO 6976.
• Clarifications on assumptions, reference conditions and limitations of the calculation methods.

Typical use and users

Users include natural gas analysts, metering and custody transfer engineers, pipeline operators, laboratory personnel, software developers implementing gas property calculators, researchers and standards committees who need the detailed technical foundation for ISO 6976 computations. The report is used when implementers or auditors require the supporting derivations, examples and uncertainty guidance that are not included in the main standard.

Related standards

Directly related to: ISO 6976:2016 (Natural gas — Calculation of calorific values, density, relative density and Wobbe indices from composition). It is produced under ISO/TC 193/SC 1 (Analysis of natural gas) and complements other natural‑gas analysis standards in the ISO 75.060 series.

Keywords

natural gas; physical properties; calorific value; density; relative density; Wobbe index; uncertainty; calculation methods; ISO 6976; technical report.

FAQ

Q: What is this standard?

A: ISO/TR 29922:2017 is an ISO Technical Report providing supporting information, derivations and worked examples that justify and explain the calculation methods given in ISO 6976:2016 for natural‑gas physical properties.

Q: What does it cover?

A: It covers the technical background to the computational methods used to calculate calorific values, density, relative density and Wobbe indices from gas composition, including derivations, numerical notes, uncertainty discussions and supplementary tables.

Q: Who typically uses it?

A: Gas analysts, laboratory staff, metering and custody transfer engineers, pipeline operators, software developers implementing gas property calculations, researchers and standards developers who need the detailed supporting material behind ISO 6976.

Q: Is it current or superseded?

A: As published it is a current ISO Technical Report issued on 3 March 2017. There is no record on the ISO bibliographic page that ISO/TR 29922:2017 has been withdrawn or superseded; users should check the ISO catalogue or their national standards body for any subsequent updates or national adoptions.

Q: Is it part of a series?

A: It complements ISO 6976:2016 and other standards developed by ISO/TC 193/SC 1 in the 75.060 natural gas ICS area; it is intended specifically as supporting material for the methods in ISO 6976 rather than as an independent calculation standard.

Q: What are the key keywords?

A: Natural gas, calorific value, density, relative density, Wobbe index, uncertainty, calculation methods, ISO 6976, technical report.