NF X20-522:1997
Natural gas. Calculation of calorific values, density, relative density and Wobbe index from composition.

Standard No.

NF X20-522:1997

Release Date

1997

Published By

Association Francaise de Normalisation

Status

Be replaced 2005-11

Replace By

NF X20-522:2005

Latest

NF X20-522:2017

NF X20-522*NF EN ISO 6976:2017

NF X20-522:1997 history

• 0000 NF X20-522:2017
• 2005 NF X20-522:2005 Natural gas - Calculation of calorific values, density, relative density and Wobbe index from composition.
• 1997 NF X20-522:1997 Natural gas. Calculation of calorific values, density, relative density and Wobbe index from composition.