![header thumbnail](/images/img-default-logo.png)
EN ISO 15970:2014
Current
The latest, up-to-date edition.
![header thumbnail](/images/img-default-logo.png)
Natural gas - Measurement of properties - Volumetric properties: density, pressure, temperature and compression factor (ISO 15970:2008)
19-03-2014
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Density at reference conditions
6 Density at operating conditions
7 Pressure
8 Temperature
9 Compression factor
Annex A (informative) - Guidance for instrument
selection, instrument test and operational
procedures
Annex B (informative) - Instrument documentation
Bibliography
ISO 15970:2008 gives requirements and procedures for the measurement of the properties of natural gas that are used mainly for volume calculation and volume conversion: density at reference and at operating conditions, pressure, temperature and compression factor.
Only those methods and instruments are considered that are suitable for field operation under the conditions of natural gas transmission and distribution, installed either in-line or on-line, and that do not involve the determination of the gas composition.
ISO 15970:2008 gives examples for currently used instruments that are available commercially and of interest to the natural gas industry.
The density at reference conditions (sometimes referred to as normal, standard or even base density) is required for conversion of volume data and can be used for other physical properties.
Density at operating conditions is measured for mass-flow measurement and volume conversion using the observed line density and can be used for other physical properties. ISO 15970:2008 covers density transducers based on vibrating elements, normally suitable for measuring ranges of 5 kg/m3 to 250 kg/m3.
Pressure measurement deals with differential, gauge and absolute pressure transmitters. It considers both analogue and smart transmitters (i.e. microprocessor based instruments) and, if not specified otherwise, the corresponding paragraphs refer to differential, absolute and gauge pressure transmitters without distinction.
Temperature measurements in natural gas are performed within the range of conditions under which transmission and distribution are normally carried out (253 K < T < 338 K). In this field of application, resistance thermometer detectors (RTD) are generally used.
The compression factor (also known as the compressibility factor or the real gas factor and given the symbol Z) appears, in particular, in equations governing volumetric metering. Moreover, the conversion of volume at metering conditions to volume at defined reference conditions can properly proceed with an accurate knowledge of Z at both relevant pressure and relevant temperature conditions.
Committee |
CEN/TC 238
|
DocumentType |
Standard
|
PublisherName |
Comite Europeen de Normalisation
|
Status |
Current
|
Standards | Relationship |
DIN EN ISO 15970 E : 2014 | Identical |
NEN EN ISO 15970 : 2014 | Identical |
UNE-EN ISO 15970:2014 | Identical |
DIN EN ISO 15970:2014-09 | Identical |
NBN EN ISO 15970 : 2014 | Identical |
NF EN ISO 15970 : 2014 | Identical |
ISO 15970:2008 | Identical |
BS EN ISO 15970:2014 | Identical |
PN EN ISO 15970 : 2014 | Identical |
NS EN ISO 15970 : 2014 | Identical |
I.S. EN ISO 15970:2014 | Identical |
SN EN ISO 15970 : 2014 | Identical |
UNI EN ISO 15970 : 2014 | Identical |
14/30288159 DC : 0 | BS EN 16726 - GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H |
DIN EN 12405-3:2016-04 | Gas meters - Conversion devices - Part 3: Flow computer |
DIN EN 16726 E : 2016 | GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H |
UNE-EN 12405-3:2016 | Gas meters - Conversion devices - Part 3: Flow computer |
I.S. EN 16726:2015 | GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H |
DIN EN 1776:2016-05 | GAS INFRASTRUCTURE - GAS MEASURING SYSTEMS - FUNCTIONAL REQUIREMENTS |
I.S. EN 1776:2015 | GAS INFRASTRUCTURE - GAS MEASURING SYSTEMS - FUNCTIONAL REQUIREMENTS |
I.S. EN 12405-3:2015 | GAS METERS - CONVERSION DEVICES - PART 3: FLOW COMPUTER |
DIN EN 16726:2016-04 | GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H |
BS EN 12405-3:2015 | Gas meters. Conversion devices Flow computer |
DIN EN 12405-3 E : 2016 | GAS METERS - CONVERSION DEVICES - PART 3: FLOW COMPUTER |
UNE-EN 1776:2017 | Gas infrastructure - Gas measuring systems - Functional requirements |
BS EN 1776:2015 | Gas infrastructure. Gas measuring systems. Functional requirements |
EN 1776:2015 | Gas infrastructure - Gas measuring systems - Functional requirements |
EN 16726:2015 | Gas infrastructure - Quality of gas - Group H |
BS EN 16726 : 2015 | GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H |
UNE-EN 16726:2016 | Gas infrastructure - Quality of gas - Group H |
EN 12405-3 : 2015 | GAS METERS - CONVERSION DEVICES - PART 3: FLOW COMPUTER |
IEC 60079-1:2014 RLV | Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d" |
ISO 10715:1997 | Natural gas — Sampling guidelines |
IEC 60381-1:1982 | Analogue signals for process control systems. Part 1: Direct current signals |
ISO 6976:2016 | Natural gas — Calculation of calorific values, density, relative density and Wobbe indices from composition |
ISO 12213-3:2006 | Natural gas Calculation of compression factor Part 3: Calculation using physical properties |
IEC 60770-2:2010 | Transmitters for use in industrial-process control systems - Part 2: Methods for inspection and routine testing |
IEC 60079-11:2011 | Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i" |
ISO 14532:2014 | Natural gas — Vocabulary |
ISO/TR 9464:2008 | Guidelines for the use of ISO 5167:2003 |
ISO 5167-1:2003 | Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 1: General principles and requirements |
IEC 60079-0:2011 | Explosive atmospheres - Part 0: Equipment - General requirements |
IEC 60751:2008 | Industrial platinum resistance thermometers and platinum temperature sensors |
IEC 60079-14:2013 | Explosive atmospheres - Part 14: Electrical installations design, selection and erection |
ISO 12213-1:2006 | Natural gas Calculation of compression factor Part 1: Introduction and guidelines |
IEC 60381-2:1978 | Analogue signals for process control systems. Part 2: Direct voltage signals |
ISO 2186:2007 | Fluid flow in closed conduits — Connections for pressure signal transmissions between primary and secondary elements |
ISO 12213-2:2006 | Natural gas Calculation of compression factor Part 2: Calculation using molar-composition analysis |
ISO 4006:1991 | Measurement of fluid flow in closed conduits — Vocabulary and symbols |
EN 1776:2015 | Gas infrastructure - Gas measuring systems - Functional requirements |
IEC 60770-1:2010 | Transmitters for use in industrial-process control systems - Part 1: Methods for performance evaluation |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.