-50% discount* If you buy the same UNE standard in different languages. * Discount on the lower pvp.

EN 1776:2025

Gas infrastructure - Gas measuring systems - Functional requirements

Edition date: 2025-12-17
In Force
Available languages: English, French
Summary: This document 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 document 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 document 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 version mentions technical topics to consider when hydrogen and natural gas / hydrogen blends flow through the measuring systems. Blends with a hydrogen content between 20mol% and 98 mol% are not considered by this standard. This document applies to hydrogen with a purity as specified in CEN/TS 17977 for rededicated natural gas systems. This document can also be used as a guideline for measuring systems for other gases e.g. gaseous CO2 for CCUS. This document does not apply to for raw or sour gases. This document does not apply to for gas measurement in CNG filling stations. This document gives guidelines when designing, installing and operating gas meters with additional functionalities (smart gas meters). Communication protocols and interfaces for gas meters and remote reading of gas meters are outside the scope of this document and are covered by the appropriate parts of the EN 13757 series. which provide a number of protocols for meter communications. Supervisory control and data acquisition protocols (SCADA) are also not covered by this document. Unless otherwise specified all pressures used in this document 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 document, the EN 15001 series, EN 12186, EN 12279 and/or EN 1775 apply additionally, where relevant.

Le présent document spécifie les exigences fonctionnelles pour la conception, la construction, les essais, la mise en service/hors service, l’exploitation, la maintenance et, le cas échéant, l’étalonnage, ainsi que des dispositions documentées appropriées pour tous les nouveaux systèmes de mesure de gaz et toutes les modifications majeures des systèmes existants. Le présent document spécifie également les classes d’exactitude des systèmes de mesure et les seuils applicables à ces classes. La conformité est démontrée par la sélection, l’installation et l’exploitation d’instruments de mesure appropriés, ainsi que par la mise en œuvre 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 contraignantes. Le présent document s’applique aux gaz de la 2e famille conformément à l’EN 437. Il s’applique également aux gaz combustibles non conventionnels traités conformes à l’EN 437 et pour lesquels une évaluation technique détaillée des exigences fonctionnelles (comme le biométhane injecté) est effectuée pour s’assurer qu’aucun autre constituant ni aucune autre propriété des gaz ne puisse compromettre l’intégrité métrologique et physique des systèmes de mesure. Cette version indique les aspects techniques à prendre en compte lorsque de l’hydrogène et des mélanges de gaz naturel et d’hydrogène circulent dans les systèmes de mesure. Le présent document peut également servir de ligne directrice pour les systèmes de mesure d’autres gaz, tels que le CO2 dans le cadre de la capture, du stockage et de la valorisation du carbone (CCUS). Le présent document ne s’applique pas aux gaz bruts ou corrosifs. Le présent document n’est pas applicable pour le mesurage de gaz dans les stations de remplissage de GNC. Le présent document 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 télérelevé des compteurs de gaz ne relèvent pas du domaine d’application du présent document et sont couverts par les parties applicables de l’EN 13757, qui fournissent un certain nombre de protocoles pour les communications relatives aux compteurs. Les systèmes de contrôle et d’acquisition de données (SCADA) ne sont pas non plus couverts par le présent document. Sauf indication contraire, toutes les pressions citées dans le présent document sont des pressions relatives. Pour les systèmes de détente-régulation de pression associés, les exigences de l’EN 12186 et/ou de l’EN 12279 s’appliquent. Pour les exigences 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 du présent document, la série des EN 15001, l’EN 12186, l’EN 12279 et/ou l’EN 1775 s’appliquent également, selon le cas.

Dieses Dokument 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 wesentliche Änderungen an bestehenden Systemen fest. Dieses Dokument legt außerdem Genauigkeitsklassen für Messsysteme und Schwellenwerte für diese Klassen fest. Der Übereinstimmungsnachweis erfolgt durch Auswahl, Einbau und Betrieb geeigneter Messinstrumente in Verbindung mit Dokumentationspflichten für die durchzuführenden Berechnungen. Für jede Genauigkeitsklasse werden Beispiele für den Übereinstimmungsnachweis gegeben, dies sind jedoch keine vorgeschriebenen Lösungen. Dieses Dokument ist anwendbar für Gase der zweiten Gasfamilie nach der Klassifizierung in EN 437. Es ist außerdem anwendbar 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 messtechnische und physische Integrität der Messsysteme nicht durch andere Bestandteile oder Eigenschaften der Gase beeinträchtigt werden kann. In dieser Version werden technische Aspekte behandelt, die zu beachten sind, wenn Wasserstoff und Erdgas-/Wasserstoff-Gemische durch die Messsysteme fließen. Gemische mit einem Wasserstoffgehalt zwischen 20 mol% und 98 mol% werden von dieser Norm nicht berücksichtigt. Dieses Dokument ist anwendbar für Wasserstoff mit einer Reinheit wie in CEN/TS 17977 für umgewidmete Erdgassysteme festgelegt. Dieses Dokument kann auch als Leitfaden für Messsysteme für andere Gase verwendet werden, z. B. gasförmiges CO2 für CCUS. Dieses Dokument ist nicht auf Roh- oder Sauergase anwendbar. Dieses Dokument ist nicht anwendbar für die Gasmessung in Erdgastankstellen. Dieses Dokument enthält Leitlinien für die Auslegung, die Installation und den Betrieb von Gaszählern mit Zusatzfunktionen (intelligente Gaszähler). Die Kommunikationsprotokolle und Schnittstellen für Gaszähler und die Fernauslesung von Gaszählern sind nicht Gegenstand des Anwendungsbereiches dieses Dokuments und werden von den betreffenden Teilen der EN 13757 Normenreihe abgedeckt, in denen eine Reihe von Protokollen für die Zählerkommunikation zur Verfügung gestellt wird. Fernwirk- und Datenerfassungsprotokolle (SCADA, en: Supervisory control and data acquisition protocols) sind ebenfalls nicht Gegenstand dieses Dokuments. Sofern nicht anders festgelegt, sind sämtliche der in diesem Dokument angegebenen Drücke Überdrücke. Für angeschlossene Druckregelsysteme sind die Anforderungen von EN 12186 und/oder EN 12279 anwendbar. Für die in den Anwendungsbereich dieses Dokuments fallenden Anforderungen an die Planung, der Umhausung, die Anordnung, die Werkstoffe für die einzelnen Komponenten, den Bau, die Be- und Entlüftung sowie die Sicherheit der Gasmesssysteme insgesamt, sind zusätzlich die Normen EN 15001 Normenreihe, EN 12186, EN 12279 und/oder EN 1775 anwendbar, sofern maßgebend.

ICS: 75.180.30-Volumetric equipment and measurements
CTN: CEN/TC 234 - 6215

The book in the author's words

Ultricies magna feugiat malesuada sociosqu varius vivamus cubilia parturient, himenaeos vitae vehicula nam placerat netus urna platea, nostra rutrum felis mattis penatibus velit quisque.
Frequently Asked Questions Do you have any questions about our products?
  • Standards UNE, EN, ISO, IEC, BSI, DIN, ASTM, AFNOR, IEEE, SAE
  • In addition, you can request the rules of the rest of the organizations through the e-mail normas@aenor.com
  • Technical books on paper and in electronic format (PDF, epub).

The standards can be purchased in PDF, reading or paper. The reading standards are not download files, they can only be viewed in the client area. The standards ordered on paper and some of the books in the catalogue are printed on demand. 

Check deadlines in normas@aenor.com.

The license of use is for one user and one device, if you want to reproduce the content of the standard, you must request a license that will have an additional cost. Send us your inquiry here 

 

The use of standards and other content protected by intellectual property rights in AI systems is prohibited. If you are interested in such uses, please contact normas@aenor.com. Failure to comply will result in the withdrawal of your Access licence.

The AENOR standards and books that appear in the online store can only be purchased exclusively through the website. AENOR does not have a physical store.

Purchase procedure: by clicking on "Buy" the desired products will go to the shopping cart. If there are display problems, the recommended browser is Chrome.

To formalize the purchase you must access the customer area. If you are not registered as a customer, you must fill in a form with the data along with a password and username. This will create the account.

Once the "Customer data" form has been completed, "Order in progress" will be displayed with all the items loaded in the shopping cart, their prices, taxes established in current legislation and shipping costs if applicable.

The prices of the standards and books that appear in the various sections do not include taxes or shipping costs.

AENOR promotional codes consist of alphanumeric characters and can only be applied to online purchases, received through a specific offer and for a limited time. To apply your promotional code, you just have to enter it in step 2 of 4 of the purchase process on the website and click on "apply", after you have identified yourself and chosen the payment methods. Promo codes are not cumulative.

 

  • Credit or debit card (Visa, Mastercard) and PayPal.
  • Bank transfer. If you opt for this form of payment, you must first send AENOR a copy of the transfer by email to normas@aenor.com
  • The purchase invoice can be downloaded from the customer area, in my previous orders

In the case of clients of companies based abroad, the taxpayer identification number of the corresponding country (for example, in Argentina the CUIT), must be filled in the CIF/NIF - VAT field .

  • Direct download via the website in the Customer Area. In the customer area, which can only be accessed with a password and username, the products purchased will be available for a period of fifteen days from the date of purchase, as long as the payment has been accepted. Files in digital format are protected and in no case editable. Before purchasing them, it is important that the license of use is read and accepted as a prior step to purchase.
  • Shipping by courier. Products purchased on physical media are shipped by courier. The maximum delivery time in Spanish territory, from the acceptance of the order by AENOR, is:
  •  Approximately seven working days for all standards purchased through the store in paper format.
  • Approximately three days for books purchased through the store. Stocks of paper books are limited and their offer on the website does not imply availability within the indicated period. In the event that the requested book is not available, the customer is notified of the delay in receiving the order, which will be approximately seven working days. 

For the rest of the products that are not on the website, check availability and delivery time at normas@aenor.com.

1. For digital products (PDF, Epub), once delivery has been made by direct download via the website in the Customer Area, you will not have the right to exercise your right of withdrawal.

2. For personalised products on paper, once the purchase has been made, you will not have the right to exercise your right of withdrawal.

3.  For all other paper products, you have the right to withdraw from the sale within 14 calendar days from the date of purchase. Remember that for the return it is essential that the product is in perfect condition, sealed by the packaging and preserving its original packaging. The customer will be responsible for pickup and shipping costs.

The order invoice includes shipping costs, so there is no amount to pay to the courier. Shipping costs are calculated based on both the final destination of the order and the number of products ordered. They include transport and packaging costs. Shipping costs are subject to periodic revisions. Outlet books will have free shipping costs only if the shipment is made in the Peninsula.

Destination Up to three standards and/or publications From three standards and/or publications
Peninsula 7,31€ 8,60€
Balearic Islands 18,04€ 23,34€
Canary Islands, Ceuta and Melilla  18,04€ 23,34€
Europe 59,17€ 80,07€
United States and Canada 70,07€ 96,94€
Rest of the world 91,94€ 115,91€
  • Purchases made by residents of the Member States of the European Union will be subject to the payment of VAT (value added tax).
  • ​​
  • In the case of legal persons and natural persons who, acting as entrepreneurs, are domiciled in a Member State of the European Union (except residents in Spain) and have an intra-community NIF/VAT registered in the VIES census, they will be exempt from paying VAT, being an essential condition the sending of this document by email to normas@aenor.com.
  • Purchases made in a private capacity (natural person), regardless of where they have their residence, will be subject to the payment of VAT.
  • Purchases made by entities in non-EU countries will be exempt from paying VAT, as long as they send the corresponding tax residence document by email to normas@aenor.com.
  • The sale operations will be understood to have been carried out at AENOR's registered office: Génova 6, 28004, Madrid – Spain. 

The contract for the purchase of products through this Website shall be governed by Spanish law. Any dispute arising out of or in connection with the use of the Website or such contract shall be subject to the exclusive jurisdiction of the Courts and Tribunals of Madrid.

Notwithstanding the foregoing, if you are entering into this contract as a consumer under the terms of Royal Decree 1/2007, nothing in this clause shall affect the rights that may be granted to you as such under applicable law.