Skip to product information
1 of 4

PayPal, credit cards. Download editable-PDF & invoice in 1 second!

GB 28378-2012 English PDF (GB28378-2012)

GB 28378-2012 English PDF (GB28378-2012)

Regular price $90.00 USD
Regular price Sale price $90.00 USD
Sale Sold out
Shipping calculated at checkout.
Quotation: 24-hr self-service. Click GB 28378-2012
See Chinese contents: GB 28378-2012

GB 28378-2012: Minimum allowable values of water efficiency and water efficiency grades for showers

This Standard specifies the minimum allowable values of water efficiency, water-saving evaluation values, water efficiency grades, technical requirements and test methods for showers.
GB 28378-2012
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 91.060
Y 71
Minimum Allowable Values of Water Efficiency
and Water Efficiency Grades for Showers
ISSUED ON. APRIL 1, 2012
IMPLEMENTED ON. APRIL 1, 2013
Issued by. General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Technical Requirements ... 5
5 Test Methods ... 6
6 Instructions for Water Efficiency Grades ... 7
Foreword
The Clause 4.2, 4.3 and 4.5 in this Standard are mandatory, while the rest are recommended.
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard was proposed by Ministry of Water Resources of National Development and Reform Commission.
This Standard shall be under the jurisdiction of Subcommittee on Water Efficiency of Water-Using Products and Appliances of National Technical Committee for Standardization of Industrial Water Conservation (SAC/TC 442/SC 1).
Drafting organizations of this Standard. National Center for Supervision and Inspection of Drainage Irrigation and Water-Saving, China National Institute of Standardization, Shenluda Group Co., Ltd., Jomoo Group Co., Ltd., Brilliant Plumbing Group Co., Ltd., Joyou Group Co., Ltd., Lejia Sanitary Equipment (Foshan) Co., Ltd., Hecheng (China) Co., Ltd., Fujian Fuquan Group Co., Ltd., Chaoan Konna Sanitary Wares Co., Ltd., Guangdong Chaozhou Mengjia Ceramics Industry Co., Ltd., Guangdong Oumer Industrial and Commercial Co., Ltd., Chaozhou Muye Ceramics Manufacture Co., Ltd., Chaozhou Uncommon Craft Industrial Co., Ltd., Chaoan Pengwang Ceramic Industrial Co., Ltd., Chaoan Oubeier Sanitary Ware Co., Ltd., Guangdong Oulu Sanitary Ware Co., Ltd., Heshan Kangliyuan Sanitary Ware Industry Co., Ltd., CAE Sanitary Fittings Industry Co., Ltd., Foshan City Faenza Sanitary Ware Co., Ltd., Kaiping City Jinhuifeng Industrial Co., Ltd., Hefei Royalstar Electronic Appliances Co., Ltd., Fujian Provincial Central Testing Institute, and Shanghai Institute of Quality Inspection and Technical Research.
Chief drafting staffs of this Standard. Zhu Shuangsi, Bai Xue, Zhu Chunyan, Hong Jiancheng, Lin Xiaofa, Weng Xianmin, Jin Minghong, Cheng Xiaomin, Zheng Aifen, Zhu Yijun, Tang Minjun, Wang Jianye, Cai Jianshe, Peng Yiqun, Shao Zeliang, Hong Jinfu, Chen Shuding, Su Xibo, Chen Keping, Huang Lihui, Zheng Xibiao, Su Shuzhou, Chen Shaowei, Chen Fangqing, Huang Jiyuan, Huang Zhenhuai, Yan Bangping, Liu Yaqing, and Pan Baochun.
Minimum Allowable Values of Water Efficiency
and Water Efficiency Grades for Showers
1 Scope
This Standard specifies the minimum allowable values of water efficiency, water-saving evaluation values, water efficiency grades, technical requirements and test methods for showers.
This Standard is applicable to the shower with nominal pressure no greater than 1.0MPa, water medium temperature no greater than 90??C, installed in the washroom (toilet, bathroom), shower room and other sanitary facilities.
This Standard is not applicable to the shower with its own heating device. 2 Normative References
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.
GB/T 8170-2008 Rules of Rounding off for Numerical Values and Expression and Judgement of Limiting Values
3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 Showers for bathing
The showering apparatus consists of valve body, sprinkler, connecting pipe and other components.
3.2 Difference among flow rates
Under the specified dynamic pressure, the difference between the maximum average flow rate and the minimum average flow rate.
3.3 Minimum allowable values of water efficiency for showers
The maximum allowable flow rate of shower.
3.4 Water efficiency grades for showers
It is confirmed as per the difference among flow rates and flow rate values, can be divided into Grade-1, Grade-2, and Grade-3; thereof, Grade-1 indicates the maximum water efficiency, while the Grade-3 indicates the minimum allowable values of water efficiency.
3.5 Rated water efficiency grade
When the shower leaves the factory, the manufacturer indicates the water efficiency grade for the shower according to the provisions of this Standard.
4 Technical Requirements
4.1 Basic requirements
Shower shall meet the express requirements of the product. This Standard data judgment adopts the rounding off comparison method; the rounding off of the numerical values shall be performed as per the provisions of GB/T 8170-2008; the digits of rounding off is consistent with the digits of the aforementioned minimum allowable values.
4.2 Difference among flow rates
Under the dynamic pressures of (0.10??0.01) MPa, (0.20??0.01) MPa and (0.30??0.01) MPa, the difference among flow rates is no greater than 0.10L/s.
4.3 Minimum flow rate
Under the dynamic pressure of (0.30??0.01) MPa, the flow rate shall be no less than 0.07L/s.
4.4 Water efficiency grades for showers
Under the dynamic pressure of (0.10??0.01) MPa, the water efficiency grades for showers shall be judged as per Table 1; such water efficiency grade shall be no less than the rated water efficiency for showers.
Table 1 -- Water Efficiency Grade Indexes for Showers
Water Efficiency Grades Grade-1 Grade-2 Grade-3
Flow rate / (L/s) 0.08 0.12 0.15
4.5 Minimum allowable values of water efficiency for showers
The minimum allowable values of water efficiency for showers indicate the Grade-3 water efficiency.
4.6 Water-saving evaluation values for showers
The water-waving evaluation values for showers indicate the Grade-2 water efficiency. 5 Test Methods
5.1 Test on difference among flow rates
The test on difference among flow rates (??F) shall be respectively performed for 3 times under the dynamic pressures of (0.10??0.01) MPa, (0.20??0.01) MPa and (0.30??0.01) MPa; respectively calculate their average values; and calculate the difference between the maximum average flow rate and minimum average flow rate. 3 times flow rates tested under (0.10??0.01) MPa are f11, f12, f13; average value of F1=(f11+f12+f13)/3;
3 times flow rates tested under (0.20??0.01) MPa are f21, f22, f23; average value of F2=(f21+f22+f23)/3;
3 times flow rates tested under (0.30??0.01) MPa are f31, f32, f33; average value of F13=(f31+f32+f33)/3;
The maximum average value Fmax (by the actual maximum value), and the minim average value Fmin (by the actual minimum value).
Difference among flow rates ??F = Fmax ?€? Fmin.
The difference among flow rates and flow rate testing device for shower shall conform to the provisions of Figure 1.
Figure 1 -- Flow Rate Testing Device Example
Flowmeter
Pressure gauge
Sample
Pressure
source
Water-supply straight pipe no
less than 300mm
5.2 Flow rate test
The product is connected to the water-supply pipe with diameter 15mm, and formed the using state; test it by cold water, cold water temperature ???30??C; start the shower valve and adjust the dynamic pressure to be 0.1MPa??0.01MPa, form stable and continuous water flow; measure the corresponding flow rate as per the following requirements.
a) For the single-valve single-control shower valve, adjust the handle to the maximum position;
b) For the dual-handle dual-control shower valve, adjust the handle to the maximum hot and cold-water positions; take the maximum flow rate value;
c) For the single-handle dual-control shower valve, adjust he handle to the maximum hot and cold water positions, and the maximum mixed water positions (i.e. in the middle); take the maximum flow rate value.
6 Instructions for Water Efficiency Grades
The manufacture shall confirm the product flow rate and rated water efficiency grade according to the requirements of this Standard and test results; the product flow rate, rated water efficiency grade, and standard number shall be indicated on the product, in the exit-factory instructions, and on the package.

View full details