PDF QB/T 2531-2010 English (QB/T 2531-2001: Older version)
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QB/T 2531-2010: PDF in English (QBT 2531-2010) QB/T 2531-2010
LIGHT INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 97.040.10
Classification number: Y81
Registration number: 30228-2011
Replacing QB/T 2531-2001
Kitchen furniture
厨房家具
ISSUED ON: NOVEMBER 22, 2010
IMPLEMENTED ON: MARCH 01, 2011
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Classification ... 8
5 Specifications ... 8
6 Kitchen design ... 11
7 Requirements ... 12
8 Test method ... 23
9 Inspection rules ... 28
Appendix A (Informative) Determination of total mass ... 32
Kitchen furniture
1 Scope
This standard specifies the terms and definitions, classification, requirements,
test methods, inspection rules and markings, instructions for use, packaging,
transportation, storage of kitchen furniture.
This standard applies to kitchen furniture made of wood, wood-based panels,
other wood materials for cabinets. Kitchen furniture made of other materials can
refer to this standard.
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 3324 General technical requirements for wooden furniture
GB/T 4893.1-2005 Furniture - Assessment of surface resistance to cold
liquids
GB/T 4893.3-2005 Furniture - Assessment of surface resistance to dry heat
GB/T 4893.9-1992 Furniture - Test for surfaces - Assessment of resistance
to impact
GB/T 5296.6-2004 Instructions for the use of consumables - Part 6: Furniture
GB 6566 Limits of radionuclides in building materials
GB/T 10357.1-1989 Test of mechanical properties of furniture - Strength and
durability of tables
GB/T 10357.4-1989 Test of mechanical properties of furniture - Stability of
storage units
GB/T 10357.5-1989 Test of mechanical properties of furniture - Strength and
durability of storage units
GB/T 17657-1999 Test methods of evaluating the properties of wood-based
panels and surface decorated wood-based panels
GB 18584 Indoor decorating and refurbishing materials - Limit of harmful
substances of wood-based furniture
GB/T 18884.1-2002 Household kitchen - Part 1: Term
QB/T 3827 Corrosion-resistant testing method of the metal deposits and
conversion coatings for the light industrial products - Acetic salt spraying test
(ASS)
QB/T 3832 Evaluation of the corrosion test results of the metal deposits for
the light industrial products
QB/T 3914-1999 Glossary of terms commonly used in the furniture industry
ISO 4589-2:1996 Plastics - Determination of combustion behavior by oxygen
index method - Part 2: Room temperature test
3 Terms and definitions
The terms and definitions as defined in GB/T 18884.1-2002, QB/T 3914-1999
as well as the following terms and definitions apply to this standard.
3.1
Kitchen furniture
A collective name for a series of cabinets (tables) used in the kitchen for
making meals and having shelf and storage functions. It is also known as a
kitchen cabinet. Kitchen cabinets usually include floor cabinets, wall cabinets
and other independent cabinets, such as middle cabinets, high cabinets, etc.,
and optional functional accessories such as rotating baskets and pull-out
baskets.
3.2
Edge treatment
Refers to the sealing treatment of the cross-section (section) of the board by
the use of sealing materials such as edge band, sealing glue or paint.
3.3
Fittings
The necessary components of the kitchen cabinet structure and assembly,
including metal and non-metallic accessories, such as: hinges, handles,
4 Classification
4.1 By the location in the space
a) Floor cabinet;
b) Middle cabinet;
c) High cabinets;
d) Wall cabinet.
4.2 By structure form
a) Split kitchen cabinet;
b) Integral kitchen cabinet.
4.3 By countertop material
a) Natural stone countertop kitchen cabinets;
b) Artificial stone countertop kitchen cabinets;
c) Wood-based panel countertop kitchen cabinets;
d) Stainless steel countertop kitchen cabinets;
e) Other countertop kitchen cabinets.
4.4 By use function
a) Cooker cabinets;
b) Operation cabinet (countertop);
c) Sink cabinets;
d) Pull-out baskets;
e) Other function cabinets.
5 Specifications
5.1 Size of kitchen cabinet
The size of the kitchen cabinet is expressed by width (W), depth (D), height (H).
The design size should be expressed in terms of the building modulus, which
pipeline and joint.
6.6 The opening of the kitchen cabinet in which the equipment is placed shall
reserve the required pipeline position and installation clearance; meanwhile it
shall be provided with a slot and a process hole that meet the needs of the
equipment installation. If an embedded gas cooker with a lower air inlet is used,
it shall design the air inlet (or air duct), which can meet the requirements of the
air inlet volume required for maximum firepower combustion. The center of the
cooker’s installation hole and the center of the range hood shall be consistent,
which has a deviation of not more than 50 mm. After installation, the front edge
of the cooker shall not exceed the front edge of the range hood.
6.7 The storage cabinet should adopt a closed structure, which is not easy to
enter insects and dust.
6.8 For all retractable (or movable tables and cabinets) components, sliding
doors, and hinged components, if their movement by themselves may cause
bodily injury, then the self-movement distance of those components from the
closed position shall not exceed 200 mm. During design, it shall make full
consideration and evaluation.
6.9 The drawer structure should not be designed in the cooker cabinet, to
prevent it from falling off due to collision with the cooker pipeline.
7 Requirements
7.1 Appearance
7.1.1 Countertop appearance
7.1.1.1 Natural stone countertops
7.1.1.1.1 The surface shall be flat and smooth, without obvious cracks,
scratches, stains, pits and other defects. The surface of the board is free of
cracks and edge loss.
7.1.1.1.2 Chamfers shall be uniform.
7.1.1.2 Artificial stone countertops
7.1.1.2.1 The surface shall be flat and smooth, without obvious cracks,
scratches, indentations, stains, pits or other defects.
7.1.1.2.2 There is no gap in the splicing of the countertop and there are no
obvious signs of splicing. The chamfers shall be uniform and consistent; there
shall be no missing edges or corners.
7.1.1.2.3 The countertop shall have a clear pattern, uniform color, no obvious
stains, discoloration, color fading, bubbles, blisters or other defects.
7.1.1.3 Wood-based panel countertop
7.1.1.3.1 The finish layer shall be flat and smooth, without obvious color
difference, stain, discoloration, color fading, scratches, wet or dry flowers, etc.
7.1.1.3.2 The chamfers shall be uniform.
7.1.1.3.3 The finish layer and the substrate shall be firmly bonded, without
degumming, debonding and bubbling.
7.1.1.3.4 The joints shall be tight and the pattern shall not be dislocated.
7.1.1.4 Stainless steel countertop
7.1.1.4.1 The surface shall be flat and smooth; the pattern shall be clear; the
pattern shall be obvious; there shall be no stains, indentations, hammer marks
or scratches.
7.1.1.4.2 The chamfers shall be uniform.
7.1.1.4.3 The splicing joints on the back surface of the combination cabinet shall
be uniform; the height difference and displacement shall not be greater than 0.5
mm.
7.1.1.5 Other countertops
7.1.1.5.1 The surface shall be flat and smooth; the pattern shall be clear, without
defects such as cracks, scratches, indentations, stains, sesame spots, bubbles,
bulges, edge loss, corner loss, etc.
7.1.1.5.2 Chamfers shall be uniform.
7.1.2 Cabinet appearance
7.1.2.1 The surface shall be flat and smooth, without cracks or obvious
scratches.
7.1.2.2 The surface coating layer shall not have defects such as exposed
bottom, obvious sagging, lump, wrinkling, blistering, fogging.
7.1.2.3 The cabinet’s pattern, color and structure shall meet the design
requirements; the pattern shall be clear and complete.
7.1.2.4 The inside and outside of the cabinet (including the shelf) shall be
finished or painted.
7.3.1.2 Wood-based panels
It shall meet the requirements of GB/T 3324.
7.3.1.3 Decorative veneer materials inside and outside cabinet
It shall be waterproof and shall not use decorative paper without waterproof
treatment.
7.3.2 Countertop material
7.3.2.1 Artificial stone countertops
7.3.2.1.1 Except for the water retaining strip and the front edge of the countertop,
the panels with a size smaller than 300 mm x 600mm shall not be used for
splicing.
7.3.2.1.2 The thickness deviation of the countertop shall not be greater than 1.0
mm.
7.3.2.2 Natural stone countertops
7.3.2.2.1 Except for the water retaining strip, the panels with a size smaller than
300 mm x 600 mm shall not be used for splicing.
7.3.2.2.2 The thickness deviation of the countertop shall not be greater than 1.0
mm.
7.3.3 Countertop plate
The splicing seam of the core board of the countertop plate shall not be greater
than 1 mm, to prevent small insects such as cockroaches from breeding.
7.4 Processing
7.4.1 Parts made of wood-based panels shall be finished and edge-treated.
7.4.2 There shall be no blisters or cracks in the veneer, edge band and post-
forming edging; there shall be no degumming, permeation, or glue traces on
the surface.
7.4.3 There shall be no visible cracks in parts and openings; the joints shall be
firm and not broken.
7.4.4 The structure of supporting parts such as drawer bars shall be firm.
7.4.5 Various opening and closing components (except for special functional
components), including doors, drawers, pull-out baskets, rotating baskets and
other parts and fittings shall be opened and closed flexible.
7.8.1.2 The surface shall be smooth and clean, free from scratches, rust and
oxidation.
7.8.1.3 The operation of movable parts shall be flexible and free of jams.
7.8.1.4 Special function fittings (such as drawer slideway with a device that
prevents natural slippage) shall function normally during normal use.
7.8.1.5 The mechanical properties of the kitchen cabinet after installing the
slideway and hinges shall meet the corresponding requirements in Table 11.
7.8.2 Requirements of cabinet hanger
Each cabinet hanger shall withstand a vertical suspension force of at least 1000
N; there shall be no damage such as deformation, cracks or fractures within 10
min.
7.8.3 Requirements of adjustment footing
7.8.3.1 The adjustable height of the adjustment footing shall not be less than
30 mm.
7.8.3.2 After each adjustment footing is subject to the 100 kg vertical load and
300 N horizontal thrust, it shall be free from looseness or damage.
7.9 Accessories
7.9.1 The surface shall be free from defects such as obvious deformation,
scratches, pores, pits, flashes, sharp edges, burrs, or corrosion.
7.9.2 The color of the coating is uniform; there are no defects such as air
bubbles, sagging, peeling, stacking paint, orange peel, or scratches.
7.9.3 The plating is uniform and free from defects such as exposed bottom,
yellowing, scorching, scratches.
7.9.4 The anodized surface’s oxide film shall be dense; the surface color shall
be consistent and uniform, without defects such as scratches.
7.9.5 Metal accessories shall be anti-corrosive treated, surface coated or plated.
After 24 h acetic acid spray test (ASS), its anti-corrosion ability shall reach
grade 10 for superior product (grade A product), grade 8 for first-grade product
(grade B product), grade 7 for qualified product (grade C product)
7.10 Installation requirements
7.10.1 The connection between the corner cabinet and the closing plate and
the corresponding kitchen cabinet and wall shall be firm and tight; the joint shall
be flat, free from chipping and looseness.
7.10.2 When installing floor cabinets and wall cabinets, the joints between each
cabinet, cabinet body and base shall be tight, firm, flat, not loose.
7.10.3 The splicing between the breakwater and the countertop shall be firm;
the joint shall be tight; the butt joint between breakwater and breakwater shall
be free from misalignment.
7.10.4 The installation of various fittings and connectors shall not be missed,
nail missing, nail penetration.
7.10.5 When installing floor cabinets and wall cabinets, they shall meet the
avoidance requirements of various pipelines and meters.
7.10.6 The joints on the countertops shall be flat and tight; it shall be impervious
to water and free from joint opening.
7.10.7 The installation of drainage pipes, sinks and kitchen furniture shall be
free of seepage and water leakage.
7.10.8 The splicing seam between split countertops shall not be greater than
0.1 mm; installation position’s deviation shall not be greater than 0.5 mm.
7.10.9 After the kitchen cabinet is installed and accepted, it shall provide the
user with instructions for use and affix a certificate of conformity on the upper
inside of the cabinet.
8 Test method
8.1 Preparation of small specimen for test
Small test specimens should be made directly on the kitchen cabinet, or they
can be made by the same materials and processes.
8.2 Inspection process
The inspection process shall follow the principle of minimizing the impact onto
the accuracy of the remaining inspection items. After the kitchen cabinet is
installed, first perform the inspection of the appearance, size, shape and
position tolerance; then perform the inspection of the processing requirements;
finally perform the test of destructive inspection items.
8.3 Classification of inspection items
The inspection items are divided into basic items, general items and graded
items. Graded items are the basis for determining product grade.
8.4 Inspection items and inspection methods
e) When the exit-factory inspection results are significantly different from the
last type inspection;
f) When a national quality supervision agency requests a type inspection.
9.2.1 Group-batching and sampling
9.2.1.1 Group-batching
Generally, a batch is formed by the products of the same type submitted to the
user by the manufacturer at one time or processed with the same batch of raw
materials (mainly cabinet materials and countertop materials).
9.2.1.2 Sampling
Randomly take sample from the same batch. The number of product samples
is 2 pieces for those based on piece as unit, wherein 1 piece is retained and
the other is delivered for inspection. The number of product samples is 2 sets
for those based on set as unit, wherein 1 set is retained and the other is
delivered for inspection (if there are multiple identical single items in the set of
products, 2 identical single pieces are delivered for inspection; the rest is
retained).
9.2.2 Inspection items
The installed products shall be inspected according to all items in Table 13. For
products that are not installed as a set, the installation requirements (7.10)
items are not tested.
9.2.3 Evaluation of inspection results
The evaluation of the inspection results is divided into the evaluation of the
individual product’s inspection results and the evaluation of the set of product’s
inspection results.
9.2.3.1 Evaluation of inspection results of individual products
The inspection results of individual products are divided into superior products
(grade A products), first-grade products (grade B products), qualified products
(grade C products), unqualified products.
a) Superior products (grade A product): The basic items are all qualified; one
grade B or one grade C is allowed in graded items; one item is allowed to
be unqualified in the common items.
b) First-grade product (grade B product): Basic items are all qualified; two
grade C items are allowed in the graded item; three items are allowed to
be unqualified in the common items.
c) Qualified products (grade C products): Basic items are all qualified; graded
items are all above grade C (including grade C); five items are allowed to
be unqualified in the common items.
d) Unqualified product: Products failed to meet the above requirements are
assessed as unqualified product.
9.2.3.2 Evaluation of inspection results of set of products
First follow the requirements of 9.2.3.1 to determine the grade of the individual
product; take the lowest grade as the quality grade of this set of products.
9.3 Exit-factory inspection
The exit-factory inspection shall be carried out by the enterprise quality
inspection department within the inspection period that the product type
inspection is qualified.
9.3.1 Group-batching and sampling
9.3.1.1 Group-batching
Generally, the product of the same type submitted to the user by the
manufacturing plant at one time is a batch or the product processed with the
same batch of raw materials (mainly cabinet materials and countertop materials)
is a batch.
9.3.1.2 Sampling
Full inspection shall be carried out at the time of exit-factory inspection.
Sampling inspection can be carried out if there is difficulty in large batch
inspection. During the sampling inspection, use the normal inspection once
sampling plan as specified in GB/T 2828; the inspection level is II; the
acceptance quality limit is AQL = 6.5.
9.3.2 Inspection items
The exit-factory inspection items are 7.1, 7.2.1, 7.3.1.1, 7.3.2, 7.4 (except 7.4.7),
7.7.3.3, 7.8.1.2, 7.8.1.3, 7.8.1.4, 7.9 (except 7.9.5).
9.3.3 Evaluation of inspection results of individual products
It is performed according to 9.2.3.2.
9.3.4 Evaluation of inspection results of batch products
Use the grade with the lowest individual piece quality in the inspection batch as
the grade of batch product. If the product requirements meet the requirements
of the grade evaluation during type inspection, the products shall be exit-factory
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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