SIST EN 1776:2016

Gas infrastructure - Gas measuring systems - Functional requirements

This European Standard specifies functional requirements for the design, construction, testing, commissioning/decommissioning, operation, maintenance and where appropriate calibration, together with suitable documented provisions for all new gas measuring systems and any major changes of existing systems.
This European Standard also specifies accuracy classes of measuring systems and thresholds applicable to these classes. Demonstration of compliance is achieved through the selection, installation and operation of appropriate measurement instruments, together with suitable documented provisions for calculations. Examples of demonstration of compliance are provided for each accuracy class; however, they are not prescriptive solutions.
This European Standard is applicable for gases of the 2nd family as classified in EN 437. It is also applicable for treated non-conventional combustible gases complying with EN 437 and for which a detailed technical evaluation of the functional requirements (such as injected biomethane) is performed ensuring there are no other constituents or properties of the gases that can affect the metrological and physical integrity of the measuring systems.
This European Standard can also be used as a guideline for 1st and 3rd family gases as classified in EN 437; however additional considerations should be taken with regard to the different constituents and physical characteristics of the gas family.
This European Standard is not applicable for raw or sour gases.
This European Standard is not applicable for gas measurement in CNG filling station.
This European Standard gives guidelines when designing, installing and operating gas meters with additional functionalities (smart meters).
Unless otherwise specified all pressures used in this European Standard are gauge pressures.
For associated pressure regulating systems the requirements of EN 12186 and/or EN 12279 apply.
For requirements on design, housing, lay-out, materials for components, construction, ventilation, venting and overall safety of gas measuring systems within the scope of this European Standard, EN 15001, EN 12186, EN 12279 and/or EN 1775 apply additionally, where relevant.
This European Standard specifies common basic principles for gas infrastructure. Users of this European Standard should be aware that more detailed national standards and/or codes of practice may exist in the CEN member countries.
This European Standard is intended to be applied in association with these national standards and/or codes of practice setting out the above mentioned basic principles.
In the event of conflicts in terms of more restrictive requirements in national legislation/regulation with the requirements of this European Standard, national legislation/regulation takes precedence as illustrated in CEN/TR 13737 parts 1 and 2.
CEN/TR 13737 (all parts) gives:
   clarification of all legislation/regulations applicable in a member state;
   if appropriate, more restrictive national requirements;
   a national contact point for the latest information.

Gasinfrastruktur - Gasmesssysteme - Funktionale Anforderungen

Diese Europäische Norm legt funktionale Anforderungen an die Planung, den Bau, die Prüfung, die In- und Außerbetriebnahme, den Betrieb und die Instandhaltung sowie gegebenenfalls die Kalibrierung in Verbindung mit geeigneten Dokumentationspflichten für alle neuen Gasmesssysteme und für erhebliche Veränderungen an bestehenden Systemen, die für den eichpflichtigen Verkehr verwendet werden, fest.
Diese Europäische Norm legt außerdem Genauigkeitsklassen für Messsysteme und Schwellenwerte für diese Klassen fest. Der Übereinstimmungsnachweis erfolgt durch Auswahl, Einbau und Betrieb geeigneter Mess-instrumente in Verbindung mit Dokumentationspflichten für die durchzuführenden Berechnungen. Für jede Genauigkeitsklasse werden Beispiele für den Übereinstimmungsnachweis gegeben, dies sind jedoch keine vorgeschriebenen Lösungen.
Diese Europäische Norm gilt für Gase der zweiten Gasfamilie nach EN 437. Sie gilt außerdem für behandelte unkonventionelle Brenngase nach EN 437, für die eine gründliche technische Beurteilung der funktionalen Anforderungen (wie z. B. eingespeistes Biomethan) durchgeführt wird, um sicherzustellen, dass die Integrität der Messsysteme nicht durch andere Bestandteile oder Eigenschaften der Gase beeinträchtigt werden kann.
Diese Europäische Norm kann auch als Leitfaden für Gase der ersten und dritten Gasfamilie nach EN 437 herangezogen werden, in diesem Falle sind aber möglicherweise weitere Betrachtungen erforderlich.
Diese Europäische Norm ist nicht auf Roh- oder Sauergase anwendbar.
Diese Europäische Norm enthält Leitlinien für die Auslegung, die Installation und den Betrieb von Gaszählern mit zusätzlichen Funktionen (intelligente Zähler). Sofern nicht anders festgelegt, sind sämtliche der in dieser Europäischen Norm angegebenen Drücke Überdrücke.
Für angeschlossene Druckregelsysteme gelten die Anforderungen von EN 12186 und/oder EN 12279.
Für die in den Anwendungsbereich der vorliegenden Europäischen Norm fallenden Anforderungen an die Planung, die Einhausung, die Anordnung, die Werkstoffe für die einzelnen Komponenten, den Bau, die Be- und Entlüftung sowie die Sicherheit der Gasmesssysteme insgesamt, gelten zusätzlich, je nach Anwendbar-keit, die Normen EN 15001, EN 12186, EN 12279 und/oder EN 1775.
Diese Europäische Norm legt allgemeine Grundsätze für die Gasinfrastruktur fest. Die Anwender dieser Europäischen Norm sollten sich darüber im Klaren sein, dass detailliertere Nationale Normen und/oder Anleitungen für die Praxis in den CEN-Mitgliedsländern existieren können.
Diese Europäische Norm ist für die Anwendung in Verbindung mit diesen die oben erwähnten allgemeinen Grundsätze darlegenden Nationalen Normen und/oder Anleitungen für die Praxis vorgesehen.
Beim Auftreten von Widersprüchen aufgrund restriktiverer Anforderungen in den nationalen Gesetzen/Vor-schriften im Vergleich zu den in der vorliegenden Europäischen Norm enthaltenen Anforderungen haben die nationalen Gesetze/Vorschriften Vorrang, wie in CEN/TR 13737 (alle Teile) dargestellt.
CEN/TR 13737 (alle Teile) enthält:
   Darstellung der in den Ländern zu beachtenden Gesetze/Vorschriften;
   wenn notwendig, darin enthaltene restriktivere nationale Anforderungen;
   eine nationale Kontaktstelle für die aktuellsten Informationen.

Infrastructure gazière - Systèmes de mesurage du gaz - Prescriptions fonctionnelles

La présente Norme européenne spécifie les prescriptions fonctionnelles pour la conception, la construction, la mise en service/mise en service, l'exploitation, la maintenance et le cas échéant, l'étalonnage approprié, ainsi que les dispositions documentées appropriées pour tous les nouveaux systèmes de mesure de gaz et toutes les modifications majeures des systèmes existants utilisés pour les transactions commerciales.
La présente Norme européenne spécifie également les classes d'exactitude des systèmes de mesure et les seuils applicables à ces classes. La démonstration de la conformité est obtenue par la sélection, l'installation et l'exploitation d'instruments de mesure appropriés, ainsi que par l'utilisation de dispositions documentées appropriées pour les calculs. Des exemples de démonstration de la conformité sont fournis pour chaque classe d'exactitude ; il ne s'agit toutefois pas de solutions prescriptives.
La présente Norme européenne s'applique aux gaz de la 2ème famille conformément à l'EN 437. Elle s'applique également aux gaz combustibles non conventionnels traités conformes à l'EN 437 et pour lesquels une évaluation technique détaillée des prescriptions fonctionnelles (telles que le biométhane injecté) est effectuée en veillant à ce qu'aucun autre constituant ou aucune autre propriété des gaz ne puisse affecter l'intégrité des systèmes de mesure.
La présente Norme européenne peut également servir de guide pour les gaz de la 1ère et de la 3ème famille, conformément à l'EN 437 ; des considérations supplémentaires peuvent toutefois être nécessaires en ce qui concerne les différents constituants et les caractéristiques physiques de la famille des gaz.
La présente Norme européenne ne s'applique pas aux gaz bruts ou corrosifs.
La présente Norme européenne n’est pas applicable pour la mesure de gaz dans une station de remplissage GNC.
La présente Norme européenne fournit des lignes directrices pour la conception, l'installation et l'exploitation des compteurs de gaz comportant des fonctionnalités supplémentaires (compteurs de gaz intelligents).
Les protocoles et les interfaces de communication pour les compteurs de gaz et le télé relevé des compteurs de gaz ne relèvent pas du domaine d'application de la présente Norme européenne et sont couverts par les parties appropriées de l'EN 13757, qui fournissent un certain nombre de protocoles pour les communications relatives aux compteurs. Les protocoles de télésurveillance et d'acquisition de données (SCADA) ne sont pas non plus couverts par la présente Norme européenne.
Sauf indication contraire, toutes les pressions utilisées dans la présente norme sont des pressions effectives.
Pour les systèmes de détente-régulation de pression, les prescriptions de l’EN 12186 et/ou de l’EN 12279 s'appliquent.
Pour les prescriptions relatives à la conception, à l’armoire, à la disposition, aux matériaux des composants, à la construction, à la ventilation, à la mise à l'atmosphère et à la sécurité globale des systèmes de mesure de gaz relevant du domaine d'application de la présente Norme européenne, les normes EN 15001, EN 12186, EN 12279 et/ou EN 1775 s'appliquent également, selon le cas.
La présente Norme européenne spécifie les principes de base communs pour les infrastructures gazières. Il convient que les utilisateurs de la présente Norme européenne gardent à l'esprit l'existence éventuelle, dans les pays membres du CEN, de codes de pratique et/ou de normes nationales plus détaillées.
La présente Norme européenne est destinée à s'appliquer conjointement avec ces normes nationales et/ou codes de pratique, qui détaillent les principes de base précités.
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Infrastruktura za plin - Merilni sistemi - Funkcionalne zahteve

Ta evropski standard določa funkcionalne zahteve za načrtovanje, izgradnjo, pregled, delovanje in vzdrževanje novih plinskih merilnih postaj za nedomači prenos skrbništva naravnega plina, kot je opisano v standardu ISO/DIS13686, z zmogljivostjo 500 m3/h ali več (pri osnovnih pogojih, glejte točko 4.1) in za delovni tlak 1 bar ali več (parni tlak). OPOMBA: Naprave, ki uporabljajo mehovne plinomere kot primarne merilne instrumente, niso zajete v tem standardu.

General Information

• Status: Published
• Public Enquiry End Date: 28-Feb-2014
• Publication Date: 27-Jan-2016
• ICS: 75.180.30 - Volumetric equipment and measurements
• ICS: 91.140.40 - Gas supply systems
• Technical Committee: DPL - Gas supply
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 07-Jan-2016
• Due Date: 13-Mar-2016
• Completion Date: 28-Jan-2016
• Directive: 2002-01-1152 - Pravilnik o tehničnih pogojih za graditev, obratovanje in vzdrževanje plinovodov z največjim delovnim tlakom do vključno 16 barov
• Directive: 2014/32/EU - Directive 2014/32/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of measuring instruments
• Directive: 93/38/EEC - Procurement procedures of entities operating in the water, energy, transport and telecommunications sectors
• Mandate: M/017 - Standardization mandate to CEN in the field of equipment and installation for the transmission and distribution of gas
• Ref Project: EN 1776:2015 - Gas infrastructure - Gas measuring systems - Functional requirements

Relations

• Replaces: SIST EN 1776:1999 - Gas supply systems - Natural gas measuring stations - Functional requirements
• Effective Date: 01-Mar-2016
• Revised: kSIST FprEN 1776:2025 - Gas infrastructure - Gas measuring systems - Functional requirements
• Effective Date: 01-Oct-2024

Overview

SIST EN 1776:2016 / EN 1776:2015 - Gas infrastructure - Gas measuring systems - Functional requirements - defines the functional requirements for the full lifecycle of gas measuring systems used in gas infrastructure. It covers design, construction, testing, commissioning/decommissioning, operation, maintenance and - where appropriate - calibration together with documented provisions required for new systems and for major changes to existing systems.

The standard specifies accuracy classes and applicable thresholds, and describes how compliance is demonstrated by selecting, installing and operating appropriate measurement instruments and documented calculation procedures. Examples for demonstrating compliance are provided for each accuracy class (informative, not prescriptive).

Key topics and technical requirements

• Scope of application
  • Intended mainly for gases of the 2nd family per EN 437; also applicable to treated non‑conventional combustible gases (e.g., injected biomethane) after technical evaluation.
  • Can be used as a guideline for 1st and 3rd family gases with additional considerations.
  • Not applicable to raw/sour gases or CNG filling station measurement.
• Energy determination methods
  • Procedures to determine energy using combinations of GCV (gross calorific value), on‑site calorific value determination devices (CVDD), and PTZ conversions (pressure, temperature, compressibility).
  • Requirements for uncertainty assessment of energy determination.
• Measurement instrumentation & sensors
  • Requirements for gas meters, differential/absolute pressure sensors, temperature sensors, density/volume measurement and sampling systems for calorific value.
  • Guidelines for smart meters and meters with additional functionalities.
• Design, construction and installation
  • Safety, housing, ventilation, pipework, valves, filtration, gas conditioning and hydrate protection.
  • EMC, corrosion protection, and hazardous‑area electrical requirements where applicable.
• Testing, commissioning and documentation
  • Strength and tightness tests, purging, pre‑commissioning and commissioning checks, acceptance, handover and ongoing records.
  • Quality system requirements and documented provisions for calculations, calibration and maintenance.
• Metrological conformity
  • Accuracy classes, thresholds and examples of conformity assessment; informative annexes include formulae, test procedures and national examples.

Practical applications and users

SIST EN 1776 is intended for professionals involved in gas measurement and billing, including:

• Gas network operators and transmission/distribution companies
• Meter manufacturers and system integrators (including smart meter vendors)
• Design and installation contractors for metering stations
• Calibration and testing laboratories
• Regulators, auditors and asset owners evaluating metrological performance
• Project engineers specifying metering systems for biomethane injection or industrial/commercial sites

Adoption ensures consistent energy measurement, reduced uncertainty in billing, and compliance with European metrological expectations.

Related standards and references

• EN 437 (gas family classification)
• EN 12186 / EN 12279 (pressure regulating systems)
• EN 1775, EN 15001 (design, safety and construction for measuring systems)
• CEN/TR 13737 (national legislation/requirements and contact points)

Note: National laws and more restrictive national standards take precedence where conflicts exist.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Infrastruktura za plin - Merilni sistemi - Funkcionalne zahteveGasinfrastruktur - Gasmesssysteme - Funktionale AnforderungenInfrastructure gazière - Systèmes de mesurage du gaz - Prescriptions fonctionnellesGas infrastructure - Gas measuring systems - Functional requirements91.140.40Sistemi za oskrbo s plinomGas supply systems75.180.30Oprema za merjenje prostornine in merjenjeVolumetric equipment and measurementsICS:Ta slovenski standard je istoveten z:EN 1776:2015SIST EN 1776:2016en,fr,de01-marec-2016SIST EN 1776:2016SLOVENSKI
STANDARDSIST EN 1776:19991DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1776
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t r s w ICS
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s y y xã s { { zEnglish Version
Gas infrastructure æ Gas measuring systems æ Functional requirements Infrastructures gazières æ Systèmes de mesure de gaz æ Prescriptions fonctionnelles
Gasinfrastruktur æ Gasmesssysteme æ Funktionale Anforderungen This European Standard was approved by CEN on
s r October
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egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
t r s w CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s y y xã t r s w ESIST EN 1776:2016

Guideline for the selection of meters . 47 Annex B (informative)
Sensor test procedures . 52 B.1 Differential pressure sensors . 52 B.2 Pressure sensors . 53 B.3 Temperature sensors . 53 B.4 Density sensors . 54 Annex C (informative)
Set of formulae to calculate volume or mass to energy . 56 C.1 General . 56 C.2 Calculation of volume . 56 C.3 Calculation of mass . 57 C.4 Calculation of energy . 57 Annex D (informative)
Comformity assessment for the energy determination . 58 D.1 Introduction. 58 SIST EN 1776:2016

Specific national examples of the assessment of conformityof the metrological performance of a gas measuring system . 60 E.1 Introduction . 60 E.2 Example 1 . 61 E.3 Example 2 . 64 E.4 Example 3 . 67 E.5 Example 4 . 70 E.6 Example 5 . 72 E.7 Example 6 . 74 E.8 Example 7 . 77 Annex F (informative)
Documentation and records . 81 F.1 Documentation . 81 F.2 Records . 81 F.3 Documentation approval . 81 Annex G (informative)
Typical examples of positions of gas measuring installations . 82 Annex H (informative)
Significant technical changes from the last edition of this standard, EN 1776:1998 . 83 Bibliography . 84
National regulations may constitute compliance with the requirement for a quality system. NOTE 2 National regulations may require that some inspection and testing of the measuring accuracy have to be witnessed and accepted by an authorized and competent person. 5 Basic requirements for measuring systems 5.1 General The output of the gas measuring system is energy (kWh or MJ), that is the product of gas volume at base conditions or mass and gross calorific value. NOTE Differing physical principles are used to determine gas volume or mass passing through the meter. The most commonly used techniques are mentioned in this European Standard. Other methods can be used. Involved parties shall ensure that the method of energy determination is traceable, reliable and satisfies the basic gas and energy measurement requirements such as accuracy, security as well as economic criteria. The chosen method shall deliver a calorific value with accuracy in line at least with legal requirements. The method shall be sufficiently accurate to reduce random and systematic errors to such a level that contractual obligations are fulfilled and that it can be justified on technical or economic considerations. Energy determination shall be based on measured or attributed values of gas composition of the gas passing through the gas meter. The quantity of gas is the volume at base condition or it’s mass. The equations for calculating the volume or mass into energy are given in Annex C. Possible methods for determining the quantities of energy are described in EN ISO 15112 and EN 12405-2. SIST EN 1776:2016
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