NF EN ISO 15112
Natural gas - Energy determination
ISO 15112:2011 provides the means for energy determination of natural gas by measurement or by calculation, and describes the related techniques and measures that are necessary to take. The calculation of thermal energy is based on the separate measurement of the quantity, either by mass or by volume, of gas transferred and its measured or calculated calorific value. The general means of calculating uncertainties are also given. Only systems currently in use are described. ISO 15112:2011 applies to any gas-measuring station from domestic to very large high-pressure transmission. New techniques are not excluded, provided their proven performance is equivalent to, or better than, that of those techniques referred to in ISO 15112:2011. Gas-measuring systems are not the subject of ISO 15112:2011.
ISO 15112:2011 provides the means for energy determination of natural gas by measurement or by calculation, and describes the related techniques and measures that are necessary to take. The calculation of thermal energy is based on the separate measurement of the quantity, either by mass or by volume, of gas transferred and its measured or calculated calorific value. The general means of calculating uncertainties are also given.
Only systems currently in use are described.
ISO 15112:2011 applies to any gas-measuring station from domestic to very large high-pressure transmission.
New techniques are not excluded, provided their proven performance is equivalent to, or better than, that of those techniques referred to in ISO 15112:2011.
Gas-measuring systems are not the subject of ISO 15112:2011.
<p>This document provides the means for energy determination of natural gas by measurement or by calculation, and describes the related techniques and measures that are necessary to take. The calculation of thermal energy is based on the separate measurement of the quantity, either by mass or by volume, of gas transferred and its measured or calculated calorific value. The general means of calculating uncertainties are also given.</p> <p>Only systems currently in use are described.</p> <p>NOTE Use of such systems in commercial or official trade can require the approval of national authorization agencies, and compliance with legal regulations is required.</p> <p>This document applies to any gas-measuring station from domestic to very large high-pressure transmission.</p> <p>New techniques are not excluded, provided their proven performance is equivalent to, or better than, that of those techniques referred to in this document.</p> <p>Gas-measuring systems are not the subject of this document.</p>
- Avant-proposv
- Introductionvi
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1 Domaine d'application1
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2 Références normatives1
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3 Termes et définitions1
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4 Symboles et unités6
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5 Principes généraux7
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6 Mesurage du gaz8
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7 Détermination de l'énergie12
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8 Stratégie et modes opératoires17
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9 Méthodes d'affectation25
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10 Calcul des quantités d'énergie30
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11 Exactitude au niveau du calcul de l'énergie33
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12 Contrôle de la qualité et assurance de la qualité36
- Annexe A (informative) Principaux instruments et techniques de détermination de l'énergie38
- Annexe B (informative) Différentes évolutions possibles du pouvoir calorifique43
- Annexe C (informative) Conversion de volume et conversion de volume en masse46
- Annexe D (informative) Détermination incrémentale de l'énergie47
- Annexe E (informative) Exemple pratique de conversion de volume et de calcul de la quantité d'énergie49
- Annexe F (informative) Exemples pratiques de calcul du pouvoir calorifique moyen en raison des différentes conditions de livraison53
- Annexe G (informative) Moyens de détermination des valeurs de remplacement58
- Annexe H (informative) Exemple de graphique de contrôle de vraisemblance60
- Annexe I (informative) Exemple de graphique portant sur les données brutes, la correction des erreurs de justesse et le résultat final61
- Annexe J (informative) Détermination du pouvoir calorifique provenant d'un réservoir unique63
- Bibliographie65
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