What is BS EN 1776- Functional requirements for Gas measuring systems about?
BS EN 1776 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.
BS EN 1776 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.
BS EN 1776 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.
BS EN 1776 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.
BS EN 1776 gives guidelines when designing, installing and operating gas meters with additional functionalities (smart gas meters).
Note 1: BS EN 1776 is not applicable for raw or sour gases, for gas measurement in CNG filling station Communication protocols and interfaces for gas meters and remote reading of gas meters are outside the scope of BS EN 1776 and are covered by the appropriate parts of EN 13757, which provide a number of protocols for meter communications. Supervisory control and data acquisition protocols (SCADA) are also not covered by BS EN 1776. For associated pressure regulating systems, the requirements of EN 12186 and/or EN 12279 apply.
Note 2: For requirements on design, housing, lay-out, materials for components, construction, ventilation, venting and overall safety of gas measuring systems within the scope of BS EN 1776, EN 15001, EN 12186, EN 12279 and/or EN 1775 apply additionally, where relevant.
Who is BS EN 1776- Functional requirements for Gas measuring systems for?
BS EN 1776 on functional requirements for Gas measuring systems is useful for:
- Designers and constructors of gas measuring systems
- Gas industry
- Safety and regulation authorities
- Operation and maintenance personnel of gas measuring system
Why should you use BS EN 1776 - Functional requirements for Gas measuring systems?
BS EN 1776 specifies different classes of measuring systems, each having their own specific requirements.
By nature, a measuring system is an aggregate of several components. BS EN 1776 allows the user to choose between different accuracy classes of measuring systems, the choice of which can be justified on economic grounds.
BS EN 1776 helps ensure effective design, installation, commissioning and operation of the gas measuring system. Compliance with BS EN 1776 guidelines also enables design, construction and operation of gas measuring systems in a safer manner.
Overall, BS EN 1776 allows you to 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.
What’s changed since the last update?
BS EN 1776:2015 comprises a major revision of EN 1776:1998. The scope of the standard is expanded and now includes also gas measuring systems in light industry, commercial as well as residental use. For this purpose the document has been restructured and amended.
