GB 28232-2020 English PDF

Delivery: 3 seconds. Download true-PDF + Invoice.
Get QUOTATION in 1-minute: Click GB 28232-2020
Historical versions: GB 28232-2020
Preview True-PDF (Reload/Scroll if blank)

GB 28232-2020: Hygienic requirements for ozone disinfector
GB 28232-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 11.080
C 50
Replacing GB 28232-2011
Hygienic requirements for ozone disinfector
ISSUED ON: APRIL 09, 2020
IMPLEMENTED ON: NOVEMBER 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 6 
4 Raw material requirements ... 7 
5 Technical requirements ... 9 
6 Application scope ... 14 
7 Method of use ... 14 
8 Testing method ... 17 
9 Transportation and storage ... 20 
10 Nameplate and instruction manual ... 20 
Appendix A (Normative) Ozone concentration determination method ... 22 
Appendix B (Normative) Ozone output determination method ... 25 
Appendix C (Normative) Ozone power consumption determination method .. 27 
Hygienic requirements for ozone disinfector
1 Scope
This standard specifies the raw material requirements, technical requirements,
application scope, use methods, inspection methods, transportation and
storage, nameplates and instruction manual for use of ozone disinfectors.
This standard applies to ozone disinfectors that generate ozone through
dielectric barrier discharge, ultraviolet radiation, electrolysis.
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 5749 Standards for drinking water quality
GB/T 5750.10 Standard examination methods for drinking Water -
Disinfection by-products parameters
GB/T 15436 Ambient air - Determination of nitrogen oxides - Saltzman
method
GB 17988 Safety and sanitation requirements for disinfecting tableware
cabinet
GB/T 18202 Hygienic standard for ozone in indoor air
GB 18466 Discharge standard of water pollutants for medical organization
GB/T 19258 UV germicidal lamp
GB 28235 Safety and sanitary standard for ultraviolet appliance of air
disinfection
GB 30689 Hygienic requirements for washer-disinfectors employing
chemical disinfection for thermolabile endoscopes
GB/T 38497 Evaluation method of endoscopic disinfection effect
GBZ 2.1 Occupational exposure limits for hazardous agents in the workplace
Part 1: Chemical hazardous agents
at the inlet end of the ozone generator.
4.1.1.3 Cooling system
4.1.1.3.1 When air is used as the cooling method of the ozone generator, the
relative humidity of the cooling air shall be ≤ 85%.
4.1.1.3.2 When water is used as the cooling method of the ozone generator,
the cooling water that directly cools the ozone generator is 6.5 ≤ pH ≤ 8.5,
chloride content ≤ 250 mg/L, total hardness (calculated as CaCO3) ≤ 450 mg/L,
turbidity (scattering turbidity unit) ≤ 1 NTU.
4.1.2 Ultraviolet radiation type
4.1.2.1 The ultraviolet lamp tube shall be made of quartz glass or raw materials
with equivalent ultraviolet transmittance.
4.1.2.2 The initial ozone output rate of the ozone ultraviolet germicidal lamp
shall not be less than 80% of the indicated value, in line with the requirements
of GB/T 19258.
4.1.3 Electrolysis type
4.1.3.1 The material of the electrolytic reaction tank shall be selected from
ozone-resistant polymer or metal materials; the membrane electrode material
shall be selected from proton exchange membranes and precious metals and
their alloys.
4.1.3.2 The gas supply source shall use deionized water with conductivity ≤ 5
µS/cm.
4.2 Ozone disinfector components
The parts contacting ozone shall use ozone-resistant materials, to ensure long-
term stable operation in an ozone environment.
4.3 Ozone-water mixing device
4.3.1 Ozone-water mixing elements with low energy consumption and high
dissolved gas efficiency shall be used; the dissolved gas efficiency shall be ≥
50%.
4.3.2 A ozone-water separation device shall be installed to separate
undissolved gaseous ozone; an ozone tail gas decomposition device shall be
installed to decompose the separated ozone gas.
4.4 Monitoring device
5.1.3 By-products
5.1.3.1 With air as the gas source, the concentration of nitrogen oxides (NOx)
produced by the ozone disinfector shall not be greater than 2.5% of the ozone
concentration.
5.1.3.2 When used for drinking water disinfection, the bromate concentration in
the water shall be ≤ 0.01 mg/L; the formaldehyde concentration shall be ≤ 0.9
mg/L.
5.1.4 Ozone leakage
The ozone disinfector is used under human conditions; it shall be airtight when
using the ozone gas for sterilization. The ozone leakage in the surrounding
environment shall be ≤ 0.1 mg/m3.
5.1.5 Residual ozone
After one working cycle of ozone disinfection under airtight conditions, the
residual amount of ozone gas in the airtight room shall be ≤ 0.16 mg/m3.
5.2 Ultraviolet radiation type ozone disinfector
5.2.1 Basic working conditions
Under the conditions of ambient temperature 5 °C ~ 45 °C, relative humidity ≤
85%, power supply voltage 220 V ± 22 V, power supply frequency 50 Hz ± 1
Hz, the ozone disinfector shall be able to be used continuously.
5.2.2 Performance requirements
5.2.2.1 The ozone gas concentration of the ozone disinfector shall be ≥ 60
mg/m3.
5.2.2.2 After turning on for 5 minutes, the ultraviolet lamp’s radiation illuminance
shall be stable under normal working conditions; the fluctuation range shall not
exceed 5% of the average value.
5.2.2.3 The effective life of the new UV lamp shall be ≥ 1000 h.
5.2.3 Leakage
5.2.3.1 UV leakage
At 30 cm away from the periphery of the disinfector, the UV leakage shall be ≤
5 µW/cm2.
5.2.3.2 Ozone leakage
6 Application scope
It is suitable for disinfection of air, water, tableware, food processing pipelines,
medical equipment, medical supplies and surface of objects.
7 Method of use
7.1 Air disinfection
7.1.1 According to the volume of the space to be disinfected and the applicable
volume requirements in the product’s instruction manual, select the applicable
ozone air disinfector model.
7.1.2 Air disinfection shall be carried out in a closed space and indoors without
people. Generally, the ozone concentration is 5 mg/m3 ~ 30 mg/m3, the relative
humidity is ≥ 70%, the action time is 30 min ~ 120 min.
7.1.3 When performing air disinfection, the doors and windows shall be closed;
the power is turned on; the indicator light is on; the switch or remote control is
pressed; the disinfection time is set; the disinfector starts to work. After a
disinfection cycle according to the set procedure, the disinfection treatment is
completed.
7.2 Water disinfection
7.2.1 It can be used for disinfection of drinking water, water for diagnosis and
treatment in medical institutions (non-injection water), sewage, swimming pool
water, central air conditioning cooling water, condensate water in public places.
7.2.2 According to the type of water to be disinfected, select the corresponding
specifications of ozone water disinfector models according to relevant
standards. Install and operate the ozone water disinfector in accordance with
the requirements of the instruction manual.
7.2.3 When used for disinfection of drinking water, the exposure time of ozone
and water before the water leaves the factory sha...