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Issued by
Ministry of Industry and Information Technology of PRC
Level / Type
National · Recommended
Issue date
July 7, 2017
Implementation date
January 1, 2018
Scope
QB/T 2806-2017 (Thermostatic faucets) is available as an English-translated PDF.
QB/T 2806-2017 is the Chinese standard "Thermostatic faucets".
Its scope clause reads: This standard specifies the terms and definitions, classification and naming, conditions of use, materials, supporting devices, requirements, single-handle three-control thermostatic faucets, test methods, inspection rules, marking, packaging, transportation and storage of thermostatic faucets.
This standard applies to the cold-water & hot-water mixed faucet which is at nominal pressure, has an ordinary-water-pressure of not more than 0.5 MPa and a high-water-pressure of not more than 2 MPa, a cold-water temperature of 4 ��C ~ 29 ��C and a hot-water temperature of 45 ��C ~ 85 ��C, is mounted on the sanitary facilities in the washroom (toilets, bathroom, etc.), kitchen and so on, whose outlet water temperature is automatically controlled by the pre- selected temperature.
Its clauses include terms and definitions; classification and naming; conditions of use; materials; supporting devices; requirements; single-handle three-control thermostatic faucet.
It was issued by the Ministry of Industry and Information Technology of PRC on 2017-07-07 and took effect on 2018-01-01.
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Document preview — QB/T 2806-2017
National Standard of the People's Republic of China
- ICS
- 91.060
Issued by: Ministry of Industry and Information Technology of PRC
Contents
- Foreword...3
- 1 Scope...5
- 2 Normative references...5
- 3 Terms and definitions...6
- 4 Classification and naming...8
- 5 Conditions of use...8
- 6 Materials...9
- 7 Supporting devices...9
- 8 Requirements...9
- 9 Single-handle three-control thermostatic faucet...17
- 10 Test methods...19
- 11 Inspection rules...24
- 12 Marking, packaging, transportation, storage...27
- Appendix A (Normative) Size of faucet...29
- Appendix B (Normative) Test of temperature stability of outlet water...44
- Appendix C (Normative) Safety test (all models)...47
- Appendix D (Normative) Test of service life...48
- Appendix E (Normative) Test of flow regulator��s torque...50
- Appendix F (Normative) Test of temperature regulator��s torque...51
1 Scope
This standard specifies the terms and definitions, classification and naming, conditions of use, materials, supporting devices, requirements, single-handle three-control thermostatic faucets, test methods, inspection rules, marking, packaging, transportation and storage of thermostatic faucets.
This standard applies to the cold-water & hot-water mixed faucet which is at nominal pressure, has an ordinary-water-pressure of not more than 0.5 MPa and a high-water-pressure of not more than 2 MPa, a cold-water temperature of 4 ��C ~ 29 ��C and a hot-water temperature of 45 ��C ~ 85 ��C, is mounted on the sanitary facilities in the washroom (toilets, bathroom, etc.), kitchen and so on, whose outlet water temperature is automatically controlled by the pre- selected temperature.
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 standard.
GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1.
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 5270-2005 Metallic coatings on metallic substrates - Electrodeposited and chemically deposited coatings - Review of methods available for testing adhesion
GB/T 6461-2002 Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates - Rating of test specimens and manufactured articles subjected to corrosion tests
GB/T 7306.1 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads - Part 1.Parallel internal and taper external threads
GB/T 7306.2 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads - Part 2.Taper internal and external threads
GB/T 7307 Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threads
GB/T 9286-1998 Paints and varnishes - Cross cut test for films
GB/T 10125-2012 Corrosion tests in artificial atmospheres - Salt spray tests
GB 18145-2014 Ceramic cartridge faucets
GB/T 23447 Shower outlets for bathing
GB/T 23448 Flexible hose for sanitary tapware
JC/T 932 Drainage fittings for sanitary wares
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Thermostatic faucets
The faucets which, when the inlet water temperature and pressure change within a certain range, automatically adjust the incoming flowrate of cold- water and hot-water, to stabilize the outlet water temperature in a certain range.
3.2
Single handle, double handle
The quantity of handles or handwheels which control the outlet water temperature, flowrate, open-close of the faucets. Single handle refers to using one handle or handwheel to control the outlet temperature or both flowrate and open-close. Double handle refers to using two handles or handwheels to respectively control the outlet water temperature, flowrate and open-close.
3.3
Single handle double control, single handle three control
Single-handle double control refers to using one handle or handwheel to control the outlet water temperature and open-close. Single-handle three- control refers to using one handle or handwheel to control the outlet water temperature, flowrate, open-close.
3.4
Close the inlet water
The open-close of the faucet is realized by opening-closing the cold and hot inlet water.
3.5
Close the outlet water
The open-close of faucet is directly achieved by opening-closing the mixed water.
3.6
Safety with cold-water or hot water failure
When cold-water or hot-water is out of supply, the temperature control device reacts quickly to regulate the hot-water or cold-water supply, so that the outlet water temperature and flowrate reach the specified value, thereby avoiding burns of human body or uncomfortable sense.
4 Classification and naming
4.1 Classification
4.1.1 According to the number of control handles, it is divided into single-handle and double-handle.
4.1.2 According to the type of temperature control, it is divided into constant- temperature faucet (hereinafter referred to as T) and constant-temperature constant-pressure faucet (hereinafter referred to as TP).
4.1.5 According to the use pressure, it is divided into ordinary-water-pressure and high-water-pressure.
4.2 Naming
The name shall include the number of control handles, the type of temperature control, the location of use, the form of installation, the pressure of use.
Example.
5 Conditions of use
5.1 Working pressure
5.1.1 Ordinary-water-pressure. water supply pressure 0.1 MPa ~ 0.5 MPa. If it
exceeds 0.5 MPa, it shall add a relief valve.
5.1.2 High-water-pressure. water supply pressure 0.1 MPa ~ 2.0 MPa. It is recommended for the water pressure for normal use to be 0.3 MPa ~ 1.5 MPa.
5.2 Temperature for use of medium
Cold-water temperature 4 ��C ~ 29 ��C, hot-water temperature 45 ��C ~ 85 ��C. It is recommended for the hot-water temperature for normal use to be 50 ��C ~
75 ��C.
6 Materials
6.1 All materials in direct contact with drinking water used in the product shall, under the conditions of use as specified in this standard, neither cause harm to human health, nor cause any changes in water quality, appearance, taste, smell of drinking water.
6.2 Parts of faucets that are in contact with water shall not be made of easily- corroded materials such as zinc alloys.
7 Supporting devices
7.1 The sprinkler matched with the faucet shall comply with the provisions of GB/T 23447.
7.2 The hose matched with the faucet shall comply with the provisions of GB/T 23448.
7.3 The drain fittings matched with the faucets shall comply with the provisions of JC/T 932.
8 Requirements
8.1 Appearance
8.1.1 The surface of the plating shall be uniform in gloss and shall not have defects such as peeling, cracking, charring, exposed bottom, falling-off, dark spots and obvious pitting, burrs and the like.
8.2 Surface performance
8.2.1 Adhesion strength of coating and plating
8.2.1.1 Adhesion strength of coating
The cross-cut test shall be carried out according to 10.2.1.1, it shall reach the requirements of grade-1.
8.2.2 Surface corrosion resistance
After the acid salt spray test according to 10.2.2, it shall not be lower than the grade-9 appearance rating (RA) requirements in Table 1 of the GB/T 6461-2002.
8.3 Thread
8.3.1 The external sealing pipe thread of the product shall comply with the provisions of GB/T 7306.1 or GB/T 7306.2.The external non-sealing pipe thread of the product shall comply with the provisions of GB/T 7307.
8.3.2 The surface of the thread shall be smooth and there shall be no obvious defects such as dents and broken teeth.
8.4 Assembly
8.4.1 The assembled handle or handwheel shall be light, stable, free from jamming. The transfer switch shall be light, stable, free from jamming when lifted or pulled. The pull-up part and the lift-up bar of the transfer switch shall be firmly connected. The rotating outlet pipe of the faucet shall be rotated light and free from jamming.
8.5 Size
The size of the faucet shall comply with the provisions of Appendix A. The other sizes shall be as agreed upon by the supplier and the purchaser.
8.6 Precipitation of metal contaminants (applicable to washing faucet and
basin faucet)
8.7 Use performance
8.7.1 Mechanical performance for hydraulic-resistance
The mechanical performance for hydraulic-resistance of the faucet shall comply with the requirements of Table 2.
8.7.4 Stability of outlet water temperature
8.7.4.1 T-type thermostatic faucet
When the water supply temperature is constant and one of the hot-water and cold-water supply pressures changes by 20%, as shown in Figure 1, in the first
5 s, the time during which the pulse peak of the outlet water temperature is
+3 ��C above the initial set value shall be not more than 1.5 s; the time during which the pulse peak exceeds the set time by -5 ��C shall be not more than 1 s.
After 5 s, the deviation between the outlet water temperature and the set outlet water temperature shall not exceed �� 2 ��C.
8.7.6 Maximum outlet water temperature
Under the temperature conditions of use of medium in 5.2, the faucet shall be able to limit the maximum outlet water temperature to �� 49 ��C.
8.7.7 Service life
After the service life reaches the requirements of Table 7, it shall comply with the requirements of Table 7.After the service life test, the temperature regulator and the flow regulator shall be free from jamming or loss of control.
8.7.8 Resistance to installation load
The installation load resistance of the faucet��s connection pipe thread shall comply with the provisions of GB 18145-2014.
8.7.9 Resistance to use load
8.7.9.1 After the flow regulator is subjected to the (6.0 �� 0.5) N m torque test, the flow regulator shall be free from defects such as deformation, jamming, cracking, loss of control of positioning.
8.7.9.2 After the temperature regulator is subjected to the (6.0 �� 0.5) N m torque at the total-cold or total-hot position and the safety temperature-limit button is subjected to the (1.7 �� 0.5) N m torque, the temperature regulator shall be free from such defects as deformation, jamming, cracking, loss of control of positioning.
8.7.9.3 The operating torque for normal use shall not exceed 1.7 N m.
9 Single-handle three-control thermostatic faucet
9.1 Classification
9.1.1 According to working pressure. see 5.1.
9.1.2 According to the method of opening and closing the mixed water. it is divided into closing the inlet water faucet and closing the outlet water faucet.
9.2 Use temperature of medium
According to the requirements of 5.2.
9.3 Performance of use
9.3.1 Sealing performance
9.3.2 Flowrate
9.3.2.1 The flowrate of ordinary-hydraulic faucet shall comply with the provisions of 8.7.3.
9.3.3 Temperature stability of outlet water
9.3.3.1 Outlet water��s temperature stability of ordinary-hydraulic nozzle
It shall meet the requirements of 8.7.4.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 51 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 2828.1-2012Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
- GB/T 5270-2005Metallic coatings on metallic substrates - Electrodeposited and chemically deposited coatings - Review of methods available for testing adhesion
- GB/T 6461-2002Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates -- Rating of test specimens and manufactured articles subjected to corrosion tests
- GB/T 7306.1Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads. Part 1: Parallel internal and taper external threads
- GB/T 7306.2Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads. Part 2: Taper internal and external threads
- GB/T 7307Pipe threads with 55-degree thread angle where pressure-tight joints are not made on the threads
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Related Standards
GB 18145-2014 — Ceramic cartridge faucets
GB/T 23447-2023 — Sanitary ware - Shower for bathing
GB/T 23448-2019 — Sanitary ware—Flexible hose
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