Standard No.:	GB/T 778.3-2007
English Name:	Measurement of water flow in fully charged closed conduits - Meters for cold potable water and hot water - Part 3: Test methods and equipment
Chinese Name:	封闭满管道中水流量的测量 饮用冷水水表和热水水表 第3部分：试验方法和试验设备
Chinese Classification:	N12    Flow capacity and material level instrument
Professional Classification:	GB    National Standard
ICS Classification:	91.140.60 91.140.60    Water supply systems 91.140.60
Issued by:	AQSIQ; SAC
Issued on:	2007-11-14
Implemented on:	2008-5-1
Status:	superseded
Superseded by:	GB/T 778.2-2018 Meters for cold potable water and hot water—Part 2:Test methods
Superseded on:	2019-1-1
Superseding:	GB/T 778.3-1996 Measurement of water flow in closed conduits--Meters for cold potable water--Part 3:Test methods and equipment
Language:	English
File Format:	PDF
Word Count:	29000 words
Price(USD):	810.0
Delivery:	via email in 1~3 business day

GB/T778的本部分规定了确定水表主要特性的试验方法和试验设备。
GB/T778的本部分适用于最高允许工作压力(MAP)大于等于1 MPa(10bar)、管道公称通径DN≥500的水表为0.6 MPa(6bar)、最高允许工作温度(MAT)饮用冷水水表为30℃、热水水表按等级最高可达到180℃的各种饮用冷水水表和热水水表。
GB/T778的本部分也适用于基于电或电子原理以及基于机械原理带电子装置、用于计量饮用冷水和热水实际体积流量的水表。
对于常用流量小于160m3/h的水表,在做耐久性试验或者各种影响量下的性能试验时,为适应各个试验实验室的条件限制,试验大纲可以对修改参比条件做出规定。