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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB 28377-2012 Minimum allowable values of water efficiency and water efficiency grades for urinals and the following main technical changes have been made with respect to GB 28377-2012:
——the scope of standard is modified;
——some terms and definitions are modified;
——the basic requirements are modified;
—— the flushing function requirements are added;
——the index of water efficiency grade for urinals is modified;
——the equation for calculating the average water consumption of urinals is added.
This standard was proposed by the Standardization Administration of the People’s Republic of China and the Department of Resource Conservation and Environmental Protection of the National Development and Reform Commission of the People's Republic of China.
This standard is under the jurisdiction of the Standardization Administration of the People’s Republic of China.
This standard was firstly issued in April, 2012 and is revised for the first time.
Minimum allowable values of water efficiency and water efficiency grades for urinals
1 Scope
This standard specifies the water efficiency grades, technical requirements and test methods for urinals.
This standard is applicable to the evaluation on water efficiency of urinals (excluding waterless urinals) installed on cold water supply piping in building facilities and used under the static water supply pressure of 0.6 MPa.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 9195 Classification and terms of building and sanitary ceramics
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 9195 and the following apply.
3.1
average water consumption of urinals
water consumption for urinal measured and calculated according to the test method and calculation equation specified in this standard
3.2
minimum allowable values of water efficiency for urinals
the maximum allowable water consumption of the urinals under the test conditions specified in this standard
3.3
evaluating values of water conservation for urinals
the maximum allowable water consumption of water-conservation urinals under the test conditions specified in this standard
Note: The evaluating values of water conservation is a requirement for evaluating the water-conservation urinals.
4 Water efficiency grade for urinal
Water efficiency for urinals is classified into 3 grades, with Grade 3 representing the lowest one. The average water consumption of various grades of urinals shall be in accordance with those specified in Table 1.
Table 1 Index of water efficiency grade for urinal In L
Water efficiency grade for urinal Grade 1 Grade 2 Grade 3
Average water consumption of urinals ≤0.5 ≤1.5 ≤2.5
5 Technical requirements
5.1 Basic requirements
The urinal shall meet the requirements of the standard prescribed expressly and shall be matched with the corresponding flushing device.
5.2 Flushing function requirements
5.2.1 Washing function
Conduct washing function test in accordance with Annex A. The total length of accumulated residual ink lines after each flushing is not greater than 25 mm, and the length of each segment of residual black marker lines is not greater than 13 mm.
5.2.2 Sewage replacement function
Conduct sewage replacement test in accordance with Annex A. Dilution rate of urinal with integral trap shall not be less than 100.
5.2.3 Water seal depth
Conduct test on water seal depth. The water seal depth of urinals with integral trap shall not be less than 50mm.
5.2.4 Water seal recovery
Conduct test on water seal recovery. The water seal recovery of urinals with integral trap shall not be less than 50mm. Siphon urinals shall be siphoned each time.
5.2.5 Minimum diameter of trap
Conduct test on water seal recovery. The water seal recovery of urinals with integral trap shall not be less than 23 mm.
5.3 Minimum allowable values of water efficiency for urinals
The minimum allowable value of water efficiency grade for urinals is Grade 3.
5.4 Evaluating values of water conservation for urinals
Evaluating values of water conservation for urinal is the water efficiency grade 2.
6 Test methods
The test methods for average water consumption and flushing function requirements for urinals shall be in accordance with Annex A.
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Water efficiency grade for urinal 5 Technical requirements 6 Test methods Annex A (Normative) Test methods
ICS 91.140.70 Q 31 中华人民共和国国家标准 GB 28377—2019 代替GB 28377—2012 小便器水效限定值及水效等级 Minimum allowable values of water efficiency and water efficiency grades for urinals 2019-12-31发布 2020-07-01实施 国家市场监督管理总局 国家标准化管理委员会 发布 前言 本标准按照GB/T 1.1—2009给出的规则起草。 本标准代替GB 28377—2012《小便器用水效率限定值及用水效率等级》,与GB 28377—2012相比,主要技术变化如下: ——修改了标准的范围; ——修改了部分术语和定义; ——修改了基本要求; ——增加了冲洗功能要求; ——修改了小便器水效等级指标; ——增加了小便器平均用水量的计算公式。 本标准由国家标准化管理委员会、中华人民共和国国家发展和改革委员会资源节约和环境保护司提出。 本标准由国家标准化管理委员会归口。 本标准于2012年4月首次发布,本次为第一次修订。 小便器水效限定值及水效等级 1 范围 本标准规定了小便器的水效等级、技术要求和试验方法。 本标准适用于安装在建筑设施内的冷水供水管路上,供水静压力不大于0.6 MPa条件下使用的各类小便器(不含无水小便器)的水效评价。 2规范性引用文件 下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本文件。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。 GB/T 9195 建筑卫生陶瓷分类及术语 3术语和定义 GB/T 9195界定的以及下列术语和定义适用于本文件。 3.1 小便器平均用水量 average water consumption of urinals 依据标准规定的试验方法和计算公式进行实测和计算得出的小便器的用水量。 3.2 小便器水效限定值 minimum allowable values of water efficiency for urinals 在标准规定的试验条件下,小便器所允许的最大用水量。 3.3 小便器节水评价值evaluating values of water conservation for urinals 在标准规定的试验条件下,节水型小便器所允许的最大用水量。 注:节水评价值是评价节水型小便器的规定要求。 4小便器水效等级 小便器水效等级分为3级,其中3级水效最低。各等级小便器的平均用水量应符合表1的规定。 表1 小便器水效等级指标 单位为升 小便器水效等级 1级 2级 3级 小便器平均用水量 ≤0.5 ≤1.5 ≤2.5