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GB/T 3324-2017 PDF in English


GB/T 3324-2017 (GB/T3324-2017, GBT 3324-2017, GBT3324-2017)
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GB/T 3324-2017: PDF in English (GBT 3324-2017)

GB/T 3324-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 97.140
Y 80
Replacing GB/T 3324-2008
General technical requirements for wooden furniture
ISSUED ON. OCTOBER 14, 2017
IMPLEMENTED ON. MAY 01, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 7
4 Product classification ... 9
5 Requirements... 9
6 Test methods ... 18
7 Inspection rules ... 24
8 Marking, instructions for use, packaging, storage, transportation ... 26
Annex A (normative) Classification and main parts of wooded furniture ... 28
Annex B (normative) Average annual equilibrium wood moisture content of
provinces (districts), municipalities and major cities in China ... 30
Annex C (informative) Standards for wood-based panels commonly used in
furniture ... 32
Foreword
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 3324-2008 “Wooden furniture - General technical
requirements”. Compared with GB/T 3324-2008, the main changes are as
follows.
- MODIFY the definition of solid wood type furniture and surface decoration;
ADD the definition of solid wood and wood-based panel type furniture;
DELETE the definition of main material (see Clause 3 of this Standard,
Clause 3 of the 2008 edition);
- MODIFY the product classification and list it in Annex A (see Annex A of this
Standard, Clause 4 of the 2008 edition);
- MODIFY the main dimensions of tables, cabinets, chairs and stools, and
beds (see 5.1 of this Standard, 5.1 of the 2008 edition);
- DELETE the requirements for the moisture content of wood-based panels;
MODIFY the consistency of identification and the technical requirements
for wood-based panels (see 5.3 of this Standard, 5.3 of 2008 edition);
- DELETE the requirements for resistance to cigarette burns; MODIFY the
requirements for wearability of paint film; MODIFY the requirements for
resistance to liquids of flexible and rigid overlay; DELETE the requirements
for surface bonding strength; ADD the requirements for resistance to wet
heat of surface; MODIFY the requirements for corrosion resistance of metal
handles (see 5.5 of this Standard, 5.5 of the 2008 edition);
- MODIFY the technical requirements for tables, cabinets, chairs and stools
(see 5.7 of this Standard, 5.7 of the 2008 edition);
- ADD the requirements and test methods for structural safety (see 5.8.1 and
6.8 of this Standard);
- MODIFY the requirements and test methods for formaldehyde emission;
ADD the requirements and test methods for VOC limit; ADD the
requirements and test methods for decomposable aromatic amines in
leather and textile fabrics (see 5.8.2 and 6.9 of this Standard, 5.8 and 6.8
of the 2008 editions);
- ADD Annex C (see Annex C of this Standard).
This Standard was proposed by China National Light Industry Council.
General technical requirements for wooden furniture
1 Scope
This Standard specifies the terms and definitions, classification, requirements,
test methods, inspection rules and marking, instructions for use, packaging,
transportation and storage of wooden furniture.
This Standard applies to wooded furniture products. Wooden parts of other
furniture may also refer to this Standard.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 1931 Method for determination of the moisture content of wood
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 4893.1 Furniture - Assessment of surface resistance to cold liquids
GB/T 4893.2 Furniture - Assessment of surface resistance to wet heat
GB/T 4893.3 Furniture - Assessment of surface resistance to dry heat
GB/T 4893.4-2013 Test of surface coatings of furniture - Part 4.
Determination of adhesion - Cross cut
GB/T 4893.7-2013 Test of surface coatings of furniture - Part 7.
Determination of surface resistance to alternation of heat and cold
GB/T 4893.8-2013 Test of surface coatings of furniture - Part 8.
Determination of wearability
GB/T 4893.9-2013 Test of surface coatings of furniture - Part 9.
Determination of resistance to impact
GB/T 5296.6 Instructions for use of products of consumer interest - Part 6.
Furniture
GB/T 10357.1-2013 Test of mechanical properties of furniture - Part 1.
Strength and durability of tables
GB/T 10357.2-2013 Test of mechanical properties of furniture - Part 2.
Stability of chairs and stools
GB/T 10357.3-2013 Test of mechanical properties of furniture - Part 3.
Strength and durability of chairs and stools
GB/T 10357.4-2013 Test of mechanical properties of furniture - Part 4.
Stability of storage units
GB/T 10357.5-2011 Test of mechanical properties of furniture - Part 5.
Strength and durability of storage units
GB/T 10357.6-2013 Test of mechanical properties of furniture - Part 6.
Strength and durability of beds
GB/T 10357.7-2013 Test of mechanical properties of furniture - Part 7.
Stability of tables
GB/T 10357.8-2015 Test of mechanical properties of furniture - Part 8.
Stability of chairs with tilting or reclining mechanisms when fully reclined, and
rocking chairs
GB/T 17592 Textiles - Determination of the banned azo colourants
GB/T 17657-2013 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 19942 Leather and fur - Chemical tests - Determination of banned azo
colourants
GB/T 23344 Textiles - Determination of 4-aminoazobenzene
GB/T 24430.2-2009 Bunk beds for domestic use - Safety - Part 2. Test
GB/T 28202-2011 Furniture industry terminology
QB/T 2385 Valuable hardwood furniture in deep color
QB/T 3826 Corrosion-resistant testing method of the metal deposits and
conversion coatings for the light industrial products - Neutral salt spraying
wooden furniture made of multiple material
Other wooden furniture made of multiple kinds of wooden materials, which
cannot be defined as solid wood type furniture, panel type furniture, solid wood
and wood-based panel type furniture.
NOTE. Adapted from GB/T 28202-2011, definition 2.1.1.3.
3.6
outward appearance
External visible surface of the product in the initial state.
3.7
vertical degree of adjoining side
Degree of the moment when the product (part) is a rectangle.
3.8
inward appearance
Visible surface displayed by opening of moving parts such as doors and
drawers, separating parts such as partitions or shelves of products.
3.9
surface decoration
Decoration on the surface of wooden parts of furniture by means of overlay,
finishing, polishing, flexible and rigid overlay, etc.
NOTE. Adapted from GB/T 28202-2011, definition 2.5.5.12.
3.10
hardware
Metal part that can meet the shape and structural requirements of furniture,
functioning as connection, activity, fastening, support and decorative light in
furniture.
[GB/T 28202-2011, definition 2.4.15]
4 Product classification
See Annex A.
5 Requirements
5.1 Main dimensions and their deviations
The main dimensions of wooden furniture and their deviations shall comply with
the requirements of Table 1.
Table 1 -- Main dimensions of wooden furniture and their deviations
In millimeters
No. Inspection item Requirement
Item
classification
Basic General
Main dimensions
of tables
Desktop height. 680 ~ 760 √
2 Intermediate clearance width. ≥ 520 √
3 Intermediate clearance height. ≥ 580 √
4 Height difference between intermediate clearance height and seat surface. ≥ 200 √
5 Height difference between table and chair (stool) accessory products .250 ~ 320 √
6 Main dimensionsof chairs and
stools
Seat panel height. hard surface 400 ~ 440,
soft surface 400 ~ 460 (including sinking) √
7 Armchair’s armrest inner width. ≥ 480 √
Main dimensions
of cabinets
Wardrobes
Distance from the upper edge
of clothes rail to the inner
surface of bottom panel
For hanging long
clothes ≥ 1400 √
9 For hanging short clothes ≥ 900 √
Depth of space for hanging clothes ≥ 530
(measurement direction shall be perpendicular
to the clothes rail)
11 Depth of space for folded clothes ≥ 450 √
12 Distance from the upper edge of clothes rail to the inner surface of top panel ≥ 40 √
13 Filing
cabinets
Net depth ≥ 245 √
14 Inter-layer net height ≥ 330 √
Main dimensions
of beds Beds
Bed length. 1900 ~ 2220 √
16 Bed width. single bed. 700 ~ 1200, double bed 1350 ~ 2000 √
17 Bed height (without a mattress). ≤ 450 √
5.8.1.4 Vertically operated parts shall not fall by themselves at any position 50
mm above the closing point.
5.8.2 Limits of hazardous substances
5.8.2.1 Limits of hazardous substances in products
It shall comply with the specifications of GB 18584.
5.8.2.2 Limits of hazardous substances in leather textile fabrics
Decomposable aromatic amine dyes are forbidden.
5.8.3 Flame retardancy
This item is required in the contract or required by the supply and demand
parties, and shall be indicated in the contract when needed.
6 Test methods
6.1 Determination of main dimensions and their deviation
The test piece shall be placed on a flat plate or the flat ground, and measured
with a steel ruler or a tape measure with an accuracy of not less than 1 mm.
Dimensional deviation is the difference between the product identification value
and the measured value.
6.2 Determination of shape and position tolerances
6.2.1 Determination of warping degree
A warping degree measuring instrument with an accuracy of not less than 0.1
mm shall be used. SELECT a panel with the most severe warping degree;
PLACE the instrument on the diagonal of the panel to measure; the maximum
distance is the measured value of warping degree.
6.2.2 Determination of level degree
A level degree measuring instrument with an accuracy of not less than 0.01 mm
is used. SELECT 3 panels with the least level degree; MEASURE the distance
between the length of 0 mm ~ 150 mm on the surface AND the reference line;
the maximum distance is the measured value of level degree.
6.2.3 Determination of vertical degree of adjoining side
A steel ruler or a tape measure with an accuracy of not less than 1 mm is used;
MEASURE the length of the two diagonals and opposite side of the rectangular
Macroscopic and microscopic inspection methods are used to determine the
consistency of product and identification. Samples of furniture materials may
be provided at the time of product inspection. If no sample is provided, it shall
be sampled on the furniture for inspection. In the inspection report, it shall
indicate that “the sample is provided” or indicate the sampling position.
6.3.2 Inspection of moth damage of wood materials
Using the method of visual observation, carefully check whether there are live
insects or eggs or moth damage powder in the wood material.
6.3.3 Determination of wood moisture content
The measurement is carried out using a wood moisture meter having an error
of not more than ±1 %. Select any 3 portions with a height of 100 mm or more
from the ground, and calculate the average moisture content of the 3 portions
as the wood moisture content of the test piece.
In case of any dispute over the test result or an arbitration test, the wood
moisture content shall be determined in accordance with GB/T 1931.
6.4 Appearance inspection
6.4.1 Decolorization and color losing inspection
Three positions are inspected at the outward appearance or inward finishing of
the product. Use a wet skim white gauze to rub back and forth 3 times at each
place by hand; the reciprocating distance of rubbing is 200 mm ~ 300 mm.
Observe whether the gauze has the color on the finished portion.
6.4.2 Inspection of other appearance inspection items
The inspection shall be carried out under natural light or near natural light in the
range of 300 lx ~ 600 lx (for example, 40 W daylight), within the visual distance
of 700 mm ~ 1000 mm, by three people. Most of the same conclusions are used
as test results.
6.5 Physical and chemical performance determination methods
6.5.1 Physical and chemical performance test position
Physical and chemical performance determination is generally carried out on
the surface of the accessible and usable portion of the horizontal part of
products.
6.5.2 Physical and chemical performance test of paint film coating
6.5.2.1 Determination of resistance to liquids of paint film
6.5.3.4 Determination of resistance to scratch
According to the specifications of 4.39 of GB/T 17657-2013, the number of test
pieces is one.
6.5.3.5 Determination of resistance to pollution
According to the specifications of 4.40 of GB/T 17657-2013, the 6 types of
pollutants marked with “*” are selected as the routine test pollutants, and the
acetone test time is 16 h. A test area is selected for each pollutant for test.
6.5.3.6 Determination of wearability
According to the specifications of 4.44 of GB/T 17657-2013, the number of test
pieces is 3.
6.5.3.7 Determination of resistance to impact
According to the specifications of GB/T 4893.9-2013, a test area is selected for
test.
6.5.3.8 Determination of color fastness
The length and width of the test piece shall be determined according to the
shape and size of the test piece clamp of the equipment. According to the
specifications of 4.30 of GB/T 17657-2013, the number of test pieces is one.
6.6 Corrosion resistance test for metal handles
According to the specifications of QB/T 3826.
6.7 Test methods for mechanical properties
6.7.1 Strength and durability of tables
According to the specifications of GB/T 10357.1-2013.
6.7.2 Stability of chairs and stools
According to the specifications of GB/T 10357.2-2013 and GB/T 10357.8-2015.
6.7.3 Strength and durability of chairs and stools
According to the specifications of GB/T 10357.3-2013.
6.7.4 Stability of cabinets
According to the specifications of GB/T 10357.4-2013.
product is folded or the locking device is invalid.
6.8.3 Vertically sliding parts
PLACE the vertically sliding part at 50 mm above the closed position and
INSPECT the part for self-sliding.
6.8.4 Others
Other structural safety items are tested by means of observation, touch, etc.
6.9 Determination of hazardous substances
6.9.1 Determination of volatile organic compounds and migratable
elements
According to the specifications of GB 18584.
6.9.2 Determination of decomposable carcinogenic aromatic amine dyes
in textile fabrics
According to the specifications of GB/T 17592 and GB/T 23344.
6.9.3 Determination of decomposable aromatic amine dyes in leather
According to the specifications of GB/T 19942.
6.10 Determination of flame retardancy
Determined according to the contractual specifications of the supply and
demand parties.
7 Inspection rules
7.1 Inspection classification
The inspection is divided into factory-exit inspection and type inspection.
7.2 Factory-exit inspection
7.2.1 Factory-exit inspection items
Factory-exit inspection is the inspection carried out when the product exits the
factory or when the product is delivered, including the following items.
a) main dimensions and their deviations;
b) shape and position tolerances;
Annex A
(normative)
Classification and main parts of wooded furniture
A.1 Main parts of wooden furniture
The main parts of wooden furniture include.
a) Cabinets and tables. usually include panel (desktops panel, countertop
panel, door panel, drawer panel, etc.), top panel, bottom panel, frame,
side panel, etc.;
b) Chairs and stools. usually include seat surface, armrest, backrest, foot
stool, footrest, etc.;
c) Beds. usually include headboard (high headboard, low headboard),
bedstead, etc.
A.2 Classification by material used for main parts of the product
It can be divided into.
a) Solid wood type furniture;
b) Wood-based panel type furniture;
c) Solid wood and wood-based panel type furniture;
d) Wooden furniture made of multiple material.
A.3 Classification by surface decoration of the product
It can be divided into.
a) Painting furniture. furniture of which the surface of the main components
is painted with paint to form a paint film;
b) Polishing furniture. furniture of which the surface of the main components
is polished with wax to form a paint film;
c) Overlaid furniture. furniture of which the main components are made of
flexible and rigid overlaid materials.
A.4 Classification by product use
Annex C
(informative)
Standards for wood-based panels commonly used in furniture
The standards for wood-based panels commonly used in furniture mainly
include the following.
- GB/T 4897-2015 Particleboard
- GB/T 5849-2006 Blockboard
- GB/T 9846-2015 Plywood for general use
- GB/T 7911-2013 High-pressure decorative laminates - Sheets made from
thermosetting resins
- GB/T 11718 Medium density fiberboard
- GB/T 15102 Surface decorated wood-based panels with paper
impregnated thermosetting resins
- GB/T 15104 Decorative veneered wood-based panel
- GB 18580-2001 Indoor decorating and refurbishing materials - Limit of
formaldehyde emission of wood-based panels and finishing products
- GB/T 31765-2015 High density fiberboard
- LY/T 1279 Polyvinyl chloride film overlaid wood-based panels
- LY/T 1655 Reconstituted decorative lumber
- LY/T 1658 Direct printing wood-based panel
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.