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Description of 21/30420942 DC 2021This document specifies the measuring conditions, requirements and tests for the construction, performance and safety of class 1,0 axial and radial turbine gas meters with mechanical indicating devices, hereinafter referred to as a meter(s), having in-line pipe connections for gas flow measurement. This document applies to turbine gas meters used to measure the volume of fuel gases of the 1st and 2nd gas families, the composition of which is specified in ENÂ 437:2021 , at maximum working pressures up to 420 bar, actual flow rates up to 25 000Â m3/h over a gas temperature range of at least 40Â K and for a climatic environmental temperature range of at least 50Â K. This document applies to meters that are installed in locations with vibration and shocks of low significance and in:
or, if specified by the manufacturer,
and in locations with electromagnetic disturbances. Unless otherwise specified in this document:
Clauses 1 to 7 and Annex B are for design and type testing only, with the exception of 6.2.4.3, 6.2.5.3, 6.7.1.2.2 and 6.7.2.2.2. Annex C can be used to provide guidance on periodic tests during use. Clause 8 and Annexes D and E are for each meter prior to dispatch. Annex A is intended to be used for both type and individual testing. Annex F is intended to be used for individual testing. Annex G is intended to be used for design.
About BSIBSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses. |
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