本文件规定了带有机械指示装置的1.0级轴向和径向涡轮燃气表（以下简称流量计）的结构、性能和安全性的测量条件、要求和试验，该流量计具有用于气体流量测量的在线管道连接。 本文件适用于在最大工作压力高达420巴的情况下，用于测量第1和第2气体系列（其成分在EN 437:2021中规定）燃料气体体积的涡轮燃气表，在至少40 K的气体温度范围和至少50 K的气候环境温度范围内，实际流量高达25 000 m3/h。 本文件适用于安装在振动和冲击程度较低位置的仪表，以及安装在以下位置的仪表: -具有冷凝或非冷凝湿度的封闭位置（具有制造商规定的保护的室内或室外）； 或者，如果制造商有规定， -具有冷凝湿度或非冷凝湿度的开放位置（室外无任何覆盖物）； 在有电磁干扰的地方。 除非本文件另有规定，否则: -使用的所有压力均为压力表； -除试验中的影响量外，所有影响量在其参考值处保持相对恒定。 第1至7条和附录B仅用于设计和型式试验，6.2.4.3、6.2.5.3、6.7.1.2.2和6.7.2.2.2除外。附录C可用于提供使用期间定期试验的指南。第8条和附件D和E适用于发货前的每台电表。附录A拟用于型式试验和单独试验。附录F拟用于单独试验。附录G拟用于设计。

This 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 EN 437:2021, at maximum working pressures up to 420 bar, actual flow rates up to 25 000 m3/h over a gas temperature range of at least 40 K and for a climatic environmental temperature range of at least 50 K. This document applies to meters that are installed in locations with vibration and shocks of low significance and in: - closed locations (indoor or outdoor with protection as specified by the manufacturer) with condensing or with non-condensing humidity; or, if specified by the manufacturer, - open locations (outdoor without any covering) with condensing humidity or with non-condensing humidity; and in locations with electromagnetic disturbances. Unless otherwise specified in this document: - all pressures used are gauge; - all influence quantities, except the one under test, are kept relatively constant at their reference value. 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.