GB/T 35937-2018 English PDF (GBT35937-2018)

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GB/T 35937-2018: Household and similar drinking water purifier performance test method
GB/T 35937-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 97.180
Y 69
Household and similar drinking water
purifier performance test method
ISSUED ON. FEBRUARY 06, 2018
IMPLEMENTED ON. SEPTEMBER 01, 2018
Issued by. General Administration of Quality Supervision Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 4 
4 Test methods ... 5 
4.1 Test conditions and equipment ... 5 
4.2 Visual inspection ... 7 
4.3 Structural performance test ... 8 
4.4 Hygiene safety test ... 11 
4.5 Performance test ... 12 
4.6 Electrical safety ... 27 
Appendix A (Informative) Preparation of contaminant liquid ... 28 
Household and similar drinking water
purifier performance test method
1 Scope
This standard specifies the terms and definitions and test methods for drinking
water treatment equipment for household and similar purposes (referred to as
“water treatment equipment”).
This standard applies to the performance test of drinking water treatment
equipment for household and similar purposes.
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 4706.1 Household and similar electrical appliances - Part 1. General
requirements
GB 5749 Standards for drinking water quality
GB/T 5750 (all parts) Standard examination methods for drinking water
GB/T 6682 Water for analytical laboratory use - Specification and test
methods
GB/T 17218 Hygienic safety evaluation for chemicals used in drinking water
treatment
GB/T 17219 Standard for safety evaluation of equipment and protective
mater
GB/T 22090 Cold and hot water dispenser
3 Terms and definitions
The following terms and definitions apply to this document.
follows.
a) The water treatment equipment unit shall be installed on a shelf or platform
off the ground. Set the equipment unit to be tested step by step in
accordance with 4.3.2 a) and b) and fill it with water.
b) Install a suitable measuring instrument (such as an extensometer or
micrometer) vertically on the container chassis and top cover, securely
install the control valve or other components on the container top cover.
c) Install a suitable measuring instrument (such as an extensometer or
diameter ruler) 15 cm from the chassis on the central axis of the container.
In addition, it shall install the additional measuring instruments on the side
wall of the container, with a vertical spacing of not more than 30 cm. The
measuring instrument shall be installed within 30 cm of the top cover of
the container. If the height of the container does not exceed 61 cm, the
measuring instrument shall be installed in the center of the container.
When using the extensometer, it shall wrap the extension line (cord)
around the container at the vertical axis, 15 cm above the chassis. One
end of the extension line shall be fixed to a solid terminal of the same
leveling height. The other end is fixed to another solid terminal at the same
level by a spring to tension the extension line. Each end of the extension
line shall be fastened to the cushion block and close to the container wall,
so that the spacing between the cushion blocks is 15 cm ~ 20 cm. For
larger containers, the spacing of the cushion blocks is allowed to be
increased accordingly to avoid contact of the cushion block with the
container. A cushion block shall be attached to each winding as described
above.
d) Record the initial value of the measuring instrument before applying
pressure to the test equipment. When using the extensometer, the module
spacing on each line shall be measured using a spiral micrometer.
e) Pressurize the test equipment in accordance with steps c) and d) of 4.3.2.
f) The final data is read from the extensometer or other measuring instrument
when the test equipment is not under pressure.
g) The difference between the readings of the measuring instrument is the
size of the permanent deformation of the top cover or bottom of the
container. The difference in the measured circumference of the container
is the increment of the circumference of the container.
4.3.4 Bursting pressure test (non-metallic pressure vessel)
Metal pressure vessels are not subjected to burst pressure test. The burst
pressure test of non-metallic pressure vessels shall be carried out as follows.
- Influent water pressure. (0.24 ± 0.02) MPa.
For the discontinuous water treatment device, the lower limit value of the
nominal value of the manufacturer is used.
4.5.2.2 Test method
Connect the water treatment device to the water supply system in accordance
with the instructions for use (except for the water storage container). After
flushing the water treatment device in accordance with the product instructions,
when the treated water volume reaches the nominal rated total purified water
volume, collect the purified water at the water outlet of the water treatment
device. The collection time is (300 ± 2) s, measure the water amount, make one
collection at the time interval of 5 min, 3 collections in total, take the arithmetic
mean of 3 test values as the test results.
4.5.3 Rated total purified water volume test
The rated total purified water volume test is performed as follows.
a) Rinse the water treatment device sample in accordance with the product
instructions;
b) Lead in the municipal tap water in accordance with the water production
flow indicated in the product description;
c) In accordance with the total rated water production, the whole process is
divided into four sections;
d) When reaching to 0% and 100% of the nominal rated total purified water
volume of the water treatment device, respectively perform purified water
quality test in accordance with the method of clause 4.5.1; at the same
time, when reaching to 0%, 25%, 50%, 75%, and 100% of the nominal
rated total purified water volume of the water treatment device, perform
the spike test, the contaminant item and concentration of the purified water
treatment device are as shown in Table 3 and Table 4, the contaminant
item and concentration of the general water treatment device are as
shown in Table 5;
e) The concentration of the contaminant liquid concentration of the general
water treatment device is approximately equivalent to three times the
allowable value of GB 5749. At this time, the removal rate of each section
is required to be greater than 60%; when it is equivalent to 5 times the
allowable value, the removal rate of each section is required to be greater
than 80%. For those with activated carbon components, the removal rate
of oxygen consumption shall be greater than or equal to 25%; the total
coliform index shall be (n x 102 ~ 2 x 103)/100mL (1 ≤ n < 10, the report
Appendix A
(Informative)
Preparation of contaminant liquid
A.1 Residual chlorine purification test
A.1.1 Preparation of residual chlorine contaminant liquid
The preparation of the residual chlorine contaminant liquid is carried out as
follows.
a) Residual chlorine standard stock solution [ρ(Cl2) = 2.0 mg/mL]. ADD 2.0
mL of 10% (effective chlori...