Revised Standard from Last Update.

FOREWORD

The Indian Standard (Part 2) (First Revision) which is identical with ISO 12213-2 : 2006 ‘Natural gas — Calculation of compression factor — Part 2: Calculation using molar-composition analysis’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of the Methods of Sampling and Test for Petroleum, its Products, Gaseous Fuels and Lubricants Sectional Committee and approval of the Petroleum, Coal and Related Products Division Council.

This Standard was originally published in 2003 which was identical with ISO 12213-2 : 1997 ‘Natural gas — Calculation of compression factor — Part 2: Calculation using molar-composition analysis. The first revision of this standard has been undertaken to align it with the latest version of ISO 12213-2.

This Indian Standard is published in three parts. The other pats in this series are:

Part 1 Introduction and guidelines method

Part 3 Calculation using physical properties.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies and conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appears referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker, while in Indian Standards, the current practice is to use a point (.) as the decimal marker.