GB/T 778.5-2018 in English

《GB/T 778.5-2018饮用冷水水表和热水水表 第5部分：安装要求》由TC124（全国工业过程测量控制和自动化标准化技术委员会）归口，TC124SC1（全国工业过程测量控制和自动化标准化技术委员会温度、流量、机械量、物位、显示仪表、执行器和结构装置分会）执行，主管部门为中国机械工业联合会。

Scope

This part of GB/T 778 specifies the selection, installation, and special requirements for water meters of single water meters, multi-type water meters, coaxial water meters and connecting pipe fittings, as well as the guidelines for the first use of new water meters or water meters after repairs, so as to ensure accurate, stable and reliable measurement of water meters. reading. This section applies to water meters that measure the volume of drinking cold water and hot water in closed full pipes and are equipped with cumulative flow indicating devices. This standard applies both to water meters based on mechanical principles, and to water meters based on electrical or electronic principles, and water meters based on mechanical principles with electronic devices, for measuring the volume of drinking cold water and hot water. This section also applies to electronic auxiliary devices. Usually electronic auxiliaries are optional, but national or international regulations may determine that certain auxiliaries are mandatory depending on the usage of the water meter. The recommendations in this section apply to water meters, defined as totalizing meters, which employ any technique for the continuous determination of the volume of water flowing through them.