DIN EN 1776:2016-05

This document (EN 1776:2015) has been prepared by Technical Committee CEN/TC 234 "Gas infrastructure", the secretariat of which is held by DIN. The present 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 used for custody transfer. The standard also includes requirements for environmental protection and energy determination. The gas measurement system described in the standard outputs energy (in kWh or MJ) as the measured value, which is the product of the gas volume at base conditions or the mass and the calorific value. Thus, the scope of this standard covers gas measurement in the domestic sector up to large measurement systems. 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 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 European Standard and are covered by the appropriate parts of EN 13757, which provide a number of protocols for meter communications. Furthermore, it should be noted that the applicable procedures for taking gas pipelines out of operation or putting them into operation are governed by national regulations and technical rules. It is planned to include this standard in the DVGW Code of Practice "Gas".