GB 17051-1997 Hygienic specification for secondary water supply facilities
Some standard content:
GB17051—1997
This standard is formulated to implement the Law of the People's Republic of China on the Prevention and Control of Infectious Diseases, to ensure that drinking water that meets sanitary requirements is provided to residents, to prevent secondary water pollution, to ensure the sanitary quality and safety of secondary water supply, to strengthen the supervision and management of secondary water supply facilities (hereinafter referred to as "facilities"), and to ensure the health of residents. Appendix A of this standard is the appendix of the standard. This standard shall be implemented from December 1, 1998. This standard is proposed by the Ministry of Health of the People's Republic of China. The drafting units of this standard are: Beijing Municipal Health and Epidemic Prevention Station, Shanghai Municipal Health and Epidemic Prevention Station, Liaoning Provincial Health and Epidemic Prevention Station, Chaoyang District Health and Epidemic Prevention Station of Beijing.
The main drafters of this standard are: Sheng Jinmei, Chen Xianzhao, Yang Yousen, Wei Xiangdong, Li Hongxi. This standard is interpreted by the Chinese Academy of Preventive Medicine, the technical unit entrusted by the Ministry of Health. 158
1 Scope
National Standard of the People's Republic of China
Hygienic specification for facilities ofsecondary water supply
This specification specifies the hygienic requirements and water quality inspection methods for secondary water supply facilities in buildings. GB17051-1997wwW.bzxz.Net
This specification is applicable to units engaged in the design, production, processing, construction, use and management of secondary water supply facilities in buildings. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB5749-85 Hygienic standard for drinking water GB575085 Standard inspection method for drinking water 3 Definitions
This standard adopts the following definitions.
3.1 Secondary water supply facilities (hereinafter referred to as facilities): equipment and pipelines that ensure normal water supply by storing, treating and transporting drinking water. 3.2 Water storage equipment: high-level, middle-level and low-level water tanks and reservoirs. 3.3 Water treatment equipment: equipment for filtration, softening, purification, mineralization and disinfection. 3.4 Water supply pipelines: pipelines, valves and faucets for supplying and transporting drinking water. 4 Hygiene requirements for facilities
4.1 The environment around the facilities should be kept clean and tidy, with good drainage conditions, and the water supply facilities should operate normally. 4.2 The surfaces of the facilities in contact with drinking water must be guaranteed to be good in appearance, smooth and flat, and not affect the quality of drinking water. 4.3 The sensory properties of drinking water supplied to residents through the facilities should not have adverse effects on people, should not contain toxic and harmful substances that endanger human health, and should not cause the occurrence or spread of intestinal infectious diseases. 5 Hygienic requirements for facility design
5.1 Design of water tanks or reservoirs: Drinking water tanks or reservoirs should be dedicated and leak-free. The distance between the top and the roof of the water tank installed in the building should be greater than 80cm. The water tank should have a corresponding vent pipe and cover. The position and size of the inlet should meet the needs of cleaning and disinfection inside the water tank. The manhole or water tank entrance should have a cover (or door) and be more than 5cm above the water tank surface, and have a locking device. There should be ladders inside and outside the water tank. The water tank must be installed on a chassis with drainage conditions. The drain pipe should be located at the bottom of the water tank. The overflow pipe and the drain pipe should not be directly connected to the sewer pipe. The material and inner wall coating of the water tank should be non-toxic and harmless, and should not affect the sensory properties of the water. The volume design of the water tank shall not exceed the user's 48-hour water consumption.
5.2 The facility shall not be directly connected to the municipal water supply pipeline. In special circumstances, when it is necessary to connect, a non-pressure water tank must be installed. Facility pipelines shall not be connected to non-drinking water pipelines. If they must be connected, anti-pollution measures shall be taken. Facility pipelines shall not be directly connected to toilet openings (troughs) and urinals. They must be flushed with a water tank or an air-blocked flushing valve. 5.3 Facilities must have a location for installing a disinfector. Unit facilities with conditions should be equipped with a disinfector. 5.4 The filtering, softening, purification, disinfection equipment and anti-corrosion coatings used in the design must have a "Product Health Safety Evaluation Report" issued by the provincial health department or above (including the provincial level). 5.5 There shall be no pollution sources such as seepage pits and piled garbage within 10m around the water reservoir. There shall be no sewage pipelines and pollutants within 2m around the water tank.
6 Preventive health supervision
The health department must participate in the design review, completion acceptance and water quality testing of secondary water supply facilities (according to all indicators of this specification), and they can be put into use only after they are qualified.
7 Water quality and sanitation standards of facilities
7.1 Water quality indicators
7.1.1 Mandatory test items: chromaticity, turbidity, odor and visible objects, pH, coliform group, total bacteria count, residual chlorine. 7.1.2 Optional test items: total hardness, chloride, nitrate nitrogen, volatile phenol, cyanide, arsenic, hexavalent chromium, iron, manganese, lead, ultraviolet intensity. 7.1.3 Additional test items: ammonia nitrogen, nitrite nitrogen, oxygen consumption. 7.2 Water quality and sanitation standards
7.2.1 The standards for mandatory and optional test items are shown in GB5749. The ultraviolet intensity is greater than 70μW/cm2. 7.2.2 The maximum allowable increase in the standards for additional test items is shown in Table 1. Table 1
Ammonia nitrogen
Nitrite nitrogen
Oxygen consumption
8 Hygiene requirements for daily use of facilities
8.1 The management department of the facility is responsible for the daily operation, maintenance, cleaning and disinfection of the facility. Maximum allowable increase, mg/L
8.2 The management unit must formulate and implement the sanitation system of the facility for the sanitation management of the facility. The management personnel shall undergo a health examination and health knowledge training once a year and be qualified to take up their posts. 8.3 The management unit shall conduct a comprehensive cleaning and disinfection of the facility every year, and inspect the water quality, timely discover and eliminate pollution hazards, and ensure the sanitation and safety of residents' drinking water.
8.4 In the event of a water supply accident, the management unit of the facility must immediately take emergency measures to ensure the daily water supply of residents, and at the same time report to the local health department and assist the health department in investigation and handling. 9 Water quality inspection method
9.1 The water quality inspection method specified in this specification is shown in GB5750. 9.2 The ultraviolet intensity measurement method is shown in Appendix A. 16
GB 17051—1997
Appendix A
(Appendix to the standard)
Ultraviolet intensity measurement method
Use physical method, use ultraviolet intensity meter with central wavelength of 2537A for measurement. When measuring, the intensity meter calibrated by the national metrology department must be used to measure the irradiation dose at the vertical distance from the center of the lamp. In practical application, the irradiation dose should be calculated according to the actual distance between the disinfected object and the lamp.
Use biological method, adopt carrier quantitative test, 105~106 bacteria/piece. After the ultraviolet lamp is turned on for 5 minutes, use 8 stained pieces, irradiate for 4 different times, take two copies of the sample, and put them in the eluent (eluent is 1% Tween 80, 1% protein saline). Vibrate 80 times, 37℃C, 48h to count the live bacteria, and calculate the killing rate. Judgment standard: the killing rate is greater than 99.9%. 161
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