GB/T 38474-2020 English PDF (GBT38474-2020)

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GB/T 38474-2020: Household stainless steel sink
GB/T 38474-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 97.040.20
Y 68
Household stainless steel sink
ISSUED ON: MARCH 06, 2020
IMPLEMENTED ON: OCTOBER 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 6 
4 Product categories ... 8 
5 Requirements ... 8 
6 Test methods ... 15 
7 Inspection rules ... 24 
8 Label making, instruction manual and packaging, transportation, storage .. 26 
Appendix A (Informative) Schematic diagram of household stainless steel sink
and related accessories ... 28 
Appendix B (Normative) Schematic diagram of the thickness measurement
position of each part of the stainless steel sink ... 29 
Household stainless steel sink
1 Scope
This standard specifies the terms and definitions, product classification,
requirements, test methods, inspection rules, labels and markings, instructions
for use, packaging, transportation, storage of household stainless steel sinks
(hereinafter referred to as sinks).
This standard applies to stainless steel sinks for household and similar
purposes.
This standard does not address safety requirements, which are related to food
contact materials.
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) is applicable to this standard.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 223 Chemical analysis methods of iron, steel and alloy
GB/T 223.4 Methods for chemical analysis of iron, steel and alloy - The
volumetric method for determination of manganese content by ammonium
nitrate oxidation
GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total
silicon content - Reduced molybdosilicate spectrophotometric method
GB/T 223.11 Iron, steel and alloy - Determination of chromium content -
Visual titration or potentiometric titration method
GB/T 223.18 Methods for chemical analysis of iron, steel and alloy - The
sodium thiosulfate separation iodometric method for the determination of
copper content
GB/T 223.19 Methods for chemical analysis of iron, steel and alloy - The
neocuproine-chloroform extraction photometric method for the
5.4 Corrosion resistance
After the metal materials of the sink and its accessories, which come into
contact with food, are tested according to 6.5, they shall meet the requirements
of appearance rating 9 in GB/T 6461-2002.
5.5 Drainage mechanism
5.5.1 Materials
It shall meet the relevant requirements of JC/T 932.
5.5.2 Dimensions
5.5.2.1 The size of the drain outlet should be ϕ114 mm, ϕ140 mm, ϕ160 mm.
5.5.2.2 The wall thickness of plastic drainage pipes and components (excluding
the tapered part, at the end of the plastic pipe and the corrugated pipe) shall
not be less than 1.57 mm.
5.5.2.3 The wall thickness of the metal drainage pipe shall meet the following
requirements:
a) The wall thickness of straight pipes, which are made of brass or copper,
shall not be less than 0.73 mm; the wall thickness of straight pipes, which
are made of stainless steel, shall not be less than 0.30 mm;
b) The wall thickness of the threaded part shall not be less than 0.83 mm;
c) The wall thickness of the corrugated pipe shall not be less than 0.40 mm.
5.5.2.4 The outer diameter of the drainage pipe shall comply with the size
matching requirements for nominal diameter (inner diameter) ϕ40 mm or ϕ50
mm, in GB/T 5836.2.
5.5.3 Use performance
5.5.3.1 Drain filter
5.5.3.1.1 After the test according to the method of 6.6.3.1.1, the leakage shall
not exceed 1%.
5.5.3.1.2 The drain filter, which is configured in the main washing bowl of the
sink, shall have a filter basket; the steel ball shall not fall off, after the test
according to the method of 6.6.3.1.2.
5.5.3.1.3 After the test according to the method of 6.6.3.1.3, the surface of the
drainage filter shall not have cracks, fractures, bubbles, delamination,
permanent discoloration, etc.
5.5.3.1.4 After the test according to the method of 6.6.3.1.4, the surface of the
drainage filter shall not be obviously damaged.
5.5.3.2 Overflow parts
5.5.3.2.1 There shall be an overflow outlet on the sink.
5.5.3.2.2 According to the test method in 6.6.3.2.2, the time, FROM the
beginning of the overflow TO the time when the water overflows from the sink,
shall not be less than 5 min.
5.5.3.3 Other properties
5.5.3.3.1 The drainage mechanism shall drain the full sink of water, within 2
minutes.
5.5.3.3.2 After the test according to the method in 6.6.3.3.2, there shall be no
leakage of water at the joint, between the drainage mechanism and the bowl;
the hose shall not be displaced from the connection, when the hot water is being
discharged.
5.5.3.3.3 The height of the water seal of the water trap shall not be less than 50
mm.
5.5.3.3.4 After the test according to the method of 6.6.3.3.4, the non-metallic
drainage pipe shall be free of cracks and water leakage.
5.5.3.3.5 After the test according to the method of 6.6.3.3.5, the drainage pipe
and its components shall be free of leakage, cracking, permanent deformation,
etc.
5.5.3.3.6 Effective sealing material shall be arranged, at the end of the drainage
mechanism.
5.6 Bearing performance
After the test according to 6.7, there shall be no abnormal phenomena, such as
sinking, cracking, de-soldering of the sink; the deformation of the bottom shall
be less than 3 mm.
5.7 Faucet opening
5.7.1 Strength
After the test according to the method of 6.8.1, the deformation of the opening
of the faucet shall be less than 3 mm.
as filler spots, ripples, overflow marks, shrinkage marks, warpage, fusion marks,
etc., nor shall there be obvious scratches, modification damage, dirt.
5.11.2.4 There shall be no obvious defects, such as dents and broken teeth, on
the thread surface.
5.11.3 Appearance of anti-condensation coating
It shall be firm and uniform in spraying; there shall be no defects, such as flow
marks, bottoming, wrinkles, falling off.
5.12 Waterproof strip
The sink for installation on or below the counter-top shall be equipped with
waterproof strips; there shall be no leakage, after the test according to 6.13.
5.13 Fastening device
The sink shall be equipped with a fastening device. The straight-line distance,
between two adjacent fastening devices of the sink, which is installed on or
below the counter-top, shall not be greater than 250 mm. Meanwhile, after the
test according to 6.14, the fastening device shall not fall off or deform.
Meanwhile, it shall not cause the sink to deform.
5.14 Accessories
5.14.1 Pop-up
5.14.1.1 The operating force of the lift and push-type pop-up switch shall be no
more than 10 N; the switch torque of the knob-type pop-up device shall not be
more than 3 N·m.
5.14.1.2 After the test in accordance with 6.15.1.2, the use function of the pop-
up device shall be normal AND meet the requirements of 5.5.3.1.1.
5.14.2 Faucet
5.14.2.1 The faucet, which is matched with the sink, shall meet the
requirements of the kitchen faucet in GB 18145.
5.14.2.2 For the faucet, which is ma...