EN ISO 6570:2004
(Main)Natural gas - Determination of potential hydrocarbon liquid content - Gravimetric methods (ISO 6570:2001)
Natural gas - Determination of potential hydrocarbon liquid content - Gravimetric methods (ISO 6570:2001)
This International Standard describes the principles of, and general requirements for, two gravimetric methods for
the determination of the potential hydrocarbon liquid content of natural gas, or similar gas, at a given pressure and
temperature. Two methods are specified in this International Standard to determine the amount of condensate in a
sample gas:
_ Method A: a manual weighing method;
_ Method B: an indirect automatic weighing method based on the indication of the pressure difference caused by
the accumulation of condensate in a vertical tube.
The manual weighing method is a reference method for the indirect automatic method (Method B). The indirect
automatic method (Method B) is suitable for semi-continuous control.
NOTE Unless otherwise specified, gas volumes are in cubic metres at 273,15 K and 101,325 kPa.
Erdgas - Bestimmung des potentiellen Gehaltes an flüssigem Kohlenwasserstoff - Gravimetrische Verfahren (ISO 6570:2001)
Die vorliegende Internationale Norm beschreibt die Prinzipien und Grundanforderungen von zwei gravimetrischen Verfahren zur Bestimmung des potenziellen Gehaltes an flüssigen Kohlenwasserstoffen in Erdgas oder einem ähnlichen Gas bei vorgegebener Temperatur und vorgegebenem Druck. In dieser Internationalen Norm werden zwei Verfahren zum Bestimmen der Kondensatmenge in einem Probegas festgelegt:
- Verfahren A: ein manuelles Wägeverfahren;
- Verfahren B: ein indirektes automatisches Wägeverfahren, das auf der Anzeige der durch die Kondensatansammlung in einem senkrechten Rohr hervorgerufenen Druckdifferenz beruht.
Das manuelle Wägeverfahren ist ein Bezugsverfahren für die indirekte automatische Messung (Verfahren A). Das indirekte automatische Verfahren (Verfahren B) ist für die halbkontinuierliche Überwachung geeignet.
ANMERKUNG Sofern nicht anderweitig festgelegt, bezieht sich das in Kubikmeter angegebene Gasvolumen auf 273,15 K und 101,325 kPa.
Gaz naturel - Détermination de la teneur en hydrocarbures liquides potentiels - Méthodes gravimétriques (ISO 6570:2001)
Zemeljski plin – Določevanje potencialne vsebnosti tekočih ogljikovodikov – Gravimetrijske metode (ISO 6570:2001)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2004
=HPHOMVNLSOLQ±'RORþHYDQMHSRWHQFLDOQHYVHEQRVWLWHNRþLKRJOMLNRYRGLNRY±
*UDYLPHWULMVNHPHWRGH ,62
Natural gas - Determination of potential hydrocarbon liquid content - Gravimetric
methods (ISO 6570:2001)
Erdgas - Bestimmung des potentiellen Gehaltes an flüssigem Kohlenwasserstoff -
Gravimetrische Verfahren (ISO 6570:2001)
Gaz naturel - Détermination de la teneur en hydrocarbures liquides potentiels - Méthodes
gravimétriques (ISO 6570:2001)
Ta slovenski standard je istoveten z: EN ISO 6570:2004
ICS:
75.060 Zemeljski plin Natural gas
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 6570
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2004
ICS 75.060
English version
Natural gas - Determination of potential hydrocarbon liquid
content - Gravimetric methods (ISO 6570:2001)
Gaz naturel - Détermination de la teneur en hydrocarbures
liquides potentiels - Méthodes gravimétriques (ISO
6570:2001)
This European Standard was approved by CEN on 22 July 2004.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6570:2004: E
worldwide for CEN national Members.
Foreword
The text of ISO 6570:2001 has been prepared by Technical Committee ISO/TC 193 "Natural
gas” of the International Organization for Standardization (ISO) and has been taken over as EN
ISO 6570:2004 by CMC.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by March 2005, and conflicting national
standards shall be withdrawn at the latest by March 2005.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Endorsement notice
The text of ISO 6570:2001 has been approved by CEN as EN ISO 6570:2004 without any
modifications.
NOTE Normative references to International Standards are listed in Annex ZA (normative).
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of
any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications, indicated
by (mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 10715 1997 Natural gas - Sampling guidelines EN ISO 10715 2000
INTERNATIONAL ISO
STANDARD 6570
First edition
2001-06-15
Natural gas — Determination of potential
hydrocarbon liquid content — Gravimetric
methods
Gaz naturel — Détermination de la teneur en hydrocarbures liquides
potentiels — Méthodes gravimétriques
Reference number
ISO 6570:2001(E)
©
ISO 2001
ISO 6570:2001(E)
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ii © ISO 2001 – All rights reserved
ISO 6570:2001(E)
Contents Page
Foreword.iv
Introduction.v
1 Scope .1
2 Normative references .1
3 Principle.2
4 Apparatus requirements .2
4.1 Measurement installation.2
4.2 Check for correct installation operation .5
5 Sampling.10
5.1 General.10
5.2 Sampling conditions .10
5.3 Sample line.10
5.4 Direct sampling.10
5.5 Indirect sampling .10
6 Procedure .11
6.1 Determination of potential hydrocarbon liquid content.11
6.2 Determination of water formation .12
7 Expression of results .12
7.1 Method A — Manual weighing method.12
7.2 Method B — Indirect automatic method.14
8 Uncertainty of measurement .15
8.1 Achievable uncertainty .15
8.2 Gas leakage.15
8.3 Bath liquid .16
8.4 Wet gas .16
8.5 Condensate leakage .16
8.6 Variations in bath temperature and pressure in the gas/liquid cyclone separator .16
8.7 Premature condensation.16
9 Test report .16
Annex A (informative) Selection of measurement temperature and pressure.17
Annex B (informative) Examples of the line-up of the apparatus .18
Annex C (informative) Example of calibration of the differential pressure gauge for the indirect
automatic method — Method B.19
Annex D (informative) Example of an indirect automatic measurement — Method B.21
ISO 6570:2001(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental and non-governmental, in
liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 6570 was prepared by Technical Committee ISO/TC 193, Natural gas, Subcommittee
SC 1, Analysis of natural gas.
This first edition cancels and replaces ISO 6570-1:1983 and ISO 6570-2:1984, which have been technically
revised.
Annexes A to D of this International Standard are given for information only.
iv © ISO 2001 – All rights reserved
ISO 6570:2001(E)
Introduction
Under certain conditions, higher hydrocarbons present in natural gas or similar gases may condense and the
condensate formed can cause difficulties in the operation of gas transport and distribution systems.
Dew-point measurements, by condensation on a mirror, may give an indication of the conditions under which
condensation starts. However, these measurements give no further information about the amount of liquid to be
expected under operating conditions.
For proper operation of transport and distribution systems, a knowledge of the quantities of condensate formed as
a function of temperature and pressure is required. This knowledge is also required for the design of production
and treatment systems as well as for subsequent handling and disposal of the liquid.
The methods described in this International Standard are intended for the determination of the quantity of
hydrocarbon condensate formed from a natural gas or similar gas as a function of the temperature and pressure of
the gas.
Instruments based on different measurement principles can give a figur
...
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