EN 1776:2015

EN 1776:2015 is a standard published by the European Committee for Standardization (CEN). Its full title is "Gas infrastructure - Gas measuring systems - Functional requirements". This standard covers: 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.

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.

EN 1776:2015 is classified under the following ICS (International Classification for Standards) categories: 75.180.30 - Volumetric equipment and measurements. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 1776:2015 has the following relationships with other standards: It is inter standard links to EN 1776:1998, EN 1776:2025, EN IEC 61000-4-29:2026, ISO 2186:2007, ISO 17089-1:2010, EN IEC 61000-6-3:2026, EN 61000-4-28:2000/A2:2009, EN 61000-4-28:2000/A1:2004, EN IEC 61000-4-6:2023, EN 61000-6-5:2015, EN 61000-4-14:1999/A2:2009, EN 61000-4-12:1995/A1:2001, EN 61000-4-34:2007/A1:2009, EN 61000-4-21:2011, EN 61000-4-13:2002/A1:2009. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN 1776:2015 is associated with the following European legislation: EU Directives/Regulations: 93/38/EEC; Standardization Mandates: M/017. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

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