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GB/T 3325-2017 English PDF (GBT3325-2017)

GB/T 3325-2017 English PDF (GBT3325-2017)

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GB/T 3325-2017: General technical requirements for metal furniture

This standard specifies the terms and definitions, classification, requirements, test methods, inspection procedures, inspection rules, marking, instructions for use, packaging, transportation and storage of metal furniture. This standard applies to metal furniture products which use the metal materials as the main structure. The furniture which uses components of other metal materials may make reference to this standard.
GB/T 3325-2017
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 97.140
Y 80
Replacing GB/T 3325-2008
General technical requirements for metal furniture
ISSUED ON. SEPTEMBER 29, 2017
IMPLEMENTED ON. APRIL 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 ... 5
2 Normative references ... 5
3 Terms and definitions ... 7
4 Classification ... 9
5 Requirements ... 9
6 Test methods ... 20
7 Inspection procedures ... 24
8 Inspection rules ... 24
9 Markings, instructions for use, packaging, transportation, storage ... 27 Appendix A (Normative) Annual average wood?€?s equilibrium moisture content in various regions of China ... 29
Appendix B (Informative) Common wood-based panel standard for furniture 31 Appendix C (Informative) Furniture?€?s mechanical performance test level ... 32 References ... 33
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 3325-2008 ?€?General technical requirements for metal furniture?€?. As compared with GB/T 3325-2008, the main changes are as follows.
- MODIFY the scope, DEFINE the scope of non-application of this standard (see clause 1; clause 1 of the 2008 version);
- MODIFY some of the normative references;
- ADD the terms and definitions as defined in GB/T 28202-2011, ADD the
terms and definitions for edge banding of wood-based panel and bonding
surface [translator note. it shall be interface] (see 3.7; 3.8 of the 2008 version);
- ADD clause 4. provisions for classification (see clause 4);
- MODIFY the size requirements of the bookcase (file cabinet), ADD the size requirements of the cabinet base plate, MODIFY the size requirements of the bunk bed (see 5.1; 4.1.1 of the 2008 version);
- DELETE the depth requirements and test methods of drawer (see 4.2 and 5.3.10 of the 2008 versions);
- DELETE the high and low dimensional requirements of the weldment crater?€?s corrugation as well as the high and low dimensional requirements of the
corrugation at the bending locations of the round and flat tube; MODIFY the soft and hard package requirements into soft package and plastic parts,
MODIFY the requirements of the glass parts (see 5.3; 4.3 of the 2008
version);
- MODIFY the standard?€?s structure; based on the principle of standardized performance, RE-CLASSIFY the contents of other requirements,
respectively INCLUDE them into the appearance performance, physical
and chemical properties and safety performance (see 5.3, 5.4 and 5.5; see 4.4 of the 2008 version);
- MODIFY the safety performance, CLASSIFY the safety performance into
structural safety, hazardous substance limits and combustion safety. ADD the drop-proof requirements for push-pull members, hole clearance
requirements and anti-slip requirements for vertical sliding parts,
CLASSIFY the requirements and test methods of volatile hazardous
substances (see 5.4; 4.5 of the 2008 version);
General technical requirements for metal furniture
1 Scope
This standard specifies the terms and definitions, classification, requirements, test methods, inspection procedures, inspection rules, marking, instructions for use, packaging, transportation and storage of metal furniture.
This standard applies to metal furniture products which use the metal materials as the main structure. The furniture which uses components of other metal materials may make reference 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 250 Textiles - Tests for color fastness - Grey scale for assessing change in color
GB/T 1043.1 Plastics - Determination of Charpy impact properties - Part 1. Non - instrumented impact test
GB/T 1732 Determination of impact resistance of film
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 3920 Textiles - Tests for color fastness - Color fastness to rubbing GB/T 4689.20 Leather - Determination for adhesion of finish
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 Test of surface coatings of furniture - Part 4. Determination of GB 28008-2011 Safety requirements of glass furniture
GB/T 28202-2011 Furniture industry terminology
QB/T 1951.2-2013 Metal furniture - Quality test and evaluation
QB/T 2537 Leather - Tests for color fastness - Color fastness to cycles of to- and-fro rubbing
QB/T 2724 Leather - Chemical test - Determination of pH
QB/T 3826 Corrosion-resistant testing method of the metal deposits and
conversion coatings for the light industrial products - Neutral salt spraying test (NSS)
QB/T 4156-2010 Office furniture - Microcomputer desk
3 Terms and definitions
The terms and definitions as defined in GB/T 28202-2011 as well as the
following terms and definitions apply to this document.
3.1
Metal furniture
A furniture which mainly uses the metal pipes, plates, and other profiles to constitute the frame or component, together with the parts and components which are made of wood, wood-based panels, leather, textile fabrics, plastics, glass, stone, and other auxiliary materials, or furniture which is made entirely of metal materials.
[GB/T 28202-2011, 2.1.2]
3.2
Vertical degree of adjoining side
The degree of non-rectangularity when the product (part) is a rectangle. [GB/T 28202-2011, 2.9.3.5]
3.3
Plane deviation
The difference between the to-be-flat plane and the measured reference
plane in the product.
The external visible surface in the initial state of the product.
3.10
Inward appearance
A visible surface displayed by a partition part such as the opening, dummy plate or shelf of the movable parts such as product door, drawer, and so on. 4 Classification
It is classified by the place of use.
a) Metal furniture for indoor use;
b) Metal furniture for outdoor use.
5 Requirements
5.1 Main dimensions and deviations
The main dimensions and deviations of the products shall comply with the requirements of Table 1.
Table 1 -- The main dimensions and deviations of product
unit in millimeter
No. Inspection item Technical requirements
Item classification
Basic General
1 Main
dimensions
of table
Table surface?€?s height. 680 ~ 760
Size
deviation
is ?? 5
- ???
2 Intermediate clearance height. ??? 580 ??? -
3 Intermediate clearance width. ??? 520 ??? -
4 Main dimension
of chair
stool
Seat height. hard surface 400 ~ 440, soft surface 400 ~
460 (including sinking amount) - ???
5 Inner width of armchair?€?s armrest. ??? 480 ??? -
6 Main dimensional
matching of
table, chair
(stool)
The matching height difference of table surface and chair
stool surface. 250 ~ 320 - ???
7 The matching height difference of intermediate clearance height and chair stool surface. ??? 200 ??? - 8 Main
dimensions
of cabinets
Closet
Spacing from upper edge of
dress rail to the inner
surface of base plate
For long dress
??? 1400 - ???
9 For short dress ??? 900 - ???
7 Stability of chair stool It shall be not tipped
GB/T 10357.2 and
GB/T 10357.8 ??? -
8 Stability of cabinet
The shelf shall not fall off, the non-fixed cabinet shall
not be tipped, the fixed cabinet shall be fixed firmly
without falling off
GB/T 10357.4 ??? -
9 Stability of bunk bed
When using the 120 N loading test, the number of
bed legs or bed corners that are lifted off the ground
shall not exceed one
5.7 in GB/T 24430.2-
2009 ??? -
6 Test methods
6.1 Determination of main dimensions and dimensional deviations
Place the test piece on a flat plate or flat ground surface, use a steel tape measure or steel ruler which has an accuracy of not less than 1 mm per meter to perform the test.
The dimensional deviation is the difference between the product?€?s design size (identified value) and the measured value.
6.2 Determination of shape and position tolerance
6.2.1 Vertical degree of adjoining side
Use a steel ruler or steel tape measure which has an accuracy of not less than 1 mm, to measure the two diagonals and the length of the opposite side of the rectangular plate or frame, the difference is the measured value of the vertical degree of adjoining side.
6.2.2 Warpage
It shall use the warpage measuring instrument with an accuracy of not less than 0.1 mm. Select the panel with the most warpage, place the measuring
instrument on the diagonal of the panel, to measure the maximum distance as the measured warpage value.
6.2.3 Plane deviation
Use a steel tape measure or steel ruler which has an accuracy of not less than 1 mm per meter, to measure the height of the midpoint of each group of opposite sides of the rectangular table above ground; for the round table surface, measure the height of the highest point on the circumference above the ground as well as the height of the other symmetrical point which passes through the circle?€?s center above the ground, the ratio of their difference to the side length or diameter is the evaluation value of the plane deviation.
the value of the left-and-right swing of the drawer side is the evaluated value of the sag and swing.
6.2.9 Landing stability of foot
Place the test piece on the flat plate or the flat ground surface, so that the test piece touches the ground on three feet, use a feeler gauge to measure the distance between the other foot and the flat plate.
6.3 Determination of appearance performance
6.3.1 Decolorization, color loss
In the outward appearance of the product or in the internal finishing locations, respectively check 3 positions, use hand to hold the wet degreased white gauze to wipe each position back and forth for three times with appropriate force. The reciprocating distance of the wiping is 200 mm ~ 300 mm. Observe whether the gauze is stained by the color from the finished part.
6.3.2 Glass parts
Under the natural light of near natural light (for example, 40 W fluorescent lamps) in the illuminance range of 300 lx ~ 600 lx, at a position 600 mm from the specimen, carry out visual inspection. In accordance with the measurement needs, the defect size is measured by a steel ruler or tape measure which has an accuracy of not less than 1 mm as well as a vernier caliper which has an accuracy of 0.02 mm.
6.3.3 Others
Under the natural light of near natural light (for example, 40 W fluorescent lamps) in the illuminance range of 300 lx ~ 600 lx, within the sight distance 700 mm ~ 1000 mm, arrange three persons to inspect it jointly, use most of the same conclusions as inspection results.
6.4 Determination of safety performance
6.4.1 Structural safety
6.4.1.1 Determination of holes and gaps
In accordance with the force value shown in Table 8 and the slip gauge
measurement by cone diameter, observe whether the cone can pass. The cone is made of plastic or a hard, smooth material, wherein the tolerance of the diameter 5 mm and 6 mm cone is 0/-0.1 mm, the tolerance of the diameter 12 mm cone is 0.1/0 mm.
purchaser.
6.5 Determination of physical and chemical performance
6.5.1 Determination of physical and chemical performance of surface
coatings/covering materials
The physical and chemical performance of the surface coating/covering
materials of the products are determined in accordance with Table 5.
6.5.2 Determination of physical and chemical performance of product
parts
The physical and chemical performance of the product parts are determined in accordance with Table 6.
6.6 Determination of mechanical properties
It is determined in accordance with the provisions of Table 7.
7 Inspection procedures
It is performed in accordance with the principles that the previous inspection has no impact or minimal impact onto the subsequent inspection results. 8 Inspection rules
8.1 Classification of inspection
The inspection is divided into two types. exit-factory inspection and type inspection.
8.2 Exit-factory inspection
The exit-factory inspection is the inspection carried out when the product is exit- factory or the product is delivered. The product can only be sold after passing the exit-factory inspection.
8.2.1 Exit-factory inspection items
The exit-factory inspection items are the following contents of this standard. a) Main dimensions and their deviations;
b) Shape and position tolerances;
c) Requirements for appearance performance;
8.3.1 Type inspection items
Type inspection is a comprehensive assessment of the quality of the product, that is, all the items related to the product as specified in clause 5 are inspected (when the entrusting party does not provide the relevant contract requirements, the contract-required items as specified in this standard are not in the routine type inspection item). When items other than those specified in clause 5 are required to be inspected, it shall provide enterprise?€?s product standard provisions or the contractual provisions of the product, the inspection shall be carried out in accordance with the relevant standards or contracts provided. 8.3.2 Timing of type inspection
Type inspection shall be carried out in one of the following cases.
a) When the trans-plant production of new product or old product is subject to trial production for finalization;
b) After formal production, if there are major changes in structure, materials and processes, which may affect product performance;
c) During normal production, periodically or after accumulating a certain amount of production, the inspection shall be carried out periodically, the inspection period is generally one year;
d) When the production is resumed after suspension for more than half a year;
e) When the exit-factory inspection result is significantly different from the results of previous type inspection;
f) When the national quality supervision agency requests the type inspection. 8.3.3 Sampling rules for type inspection
In one inspection cycle, randomly take 2 samples from the recently produced products, one for inspection and one retained.
8.3.4 Test methods of type inspection
It is performed in accordance with the provisions of clause 6. The specimens for the surface coating/covering material test shall generally be obtained directly from the product under inspection, or be made under the same process
conditions as the product under inspection.
8.3.5 Assessment of type inspection results
8.3.5.1 For the inspection results of single product, if the basic items are all Appendix A
(Normative)
Annual average wood?€?s equilibrium moisture content in various regions
of China
The annual average wood?€?s equilibrium moisture content of the product in the area of the product shall be assessed using the values of each region in Table A.1 as the basis for assessment. For the cities not listed in Table A.1, it shall use the annual average wood?€?s equilibrium moisture content of the
corresponding province (district) as the basis for assessment.
Table A.1 -- Annual average wood?€?s equilibrium moisture content of
provinces (districts), municipalities and major cities in China
Name of each
province and city
Annual average equilibrium
moisture content, %
Name of each
province and city
Annual average equilibrium
moisture content, %
* Beijing 11.4 * Xinjiang 10.0
* Heilongjiang 13.6 Urumqi 12.7
Harbin 13.6 * Ningxia 10.6
Qiqihar 12.9 Yinchuan 11.8
Jiamusi 13.7 * Shannxi 12.8
Mudanjiang 13.9 Xi?€?an 14.3
Keshan 14.3 * Qinghai 10.2
* Jilin 13.1 Xining 11.5
Changchun 13.3 * Chongqing 15.9
Siping 13.2 * Sichuan 14.3
* Liaoning 12.2 Chengdu 16.0
Shenyang 13.4 Ya?€?an 15.3
Dalian 13.0 Kangding 13.9
* Inner Mongolia 11.1 Yibin 16.3
Hohhot 11.2 * Gansu 11.1
* Tianjin 12.6 Lanzhou 11.3
* Shanxi 11.4 * Tibet 10.6
Taiyuan 11.7 Lhasa 8.6
* Hebei 11.5 Changdu 10.3
Shijiazhuang 11.8 * Guizhou 16.3
Appendix B
(Informative)
Common wood-based panel standard for furniture
The commonly used standard for wood-based panels used in furniture is as follows.
- GB/T 4897-2015 Particleboard;
- GB/T 5849-2006 Blockboard;
- GB/T 7911-2013 High-pressure decorative laminates - Sheets made from
thermosetting resins;
- GB/T 9846-2015 Plywood for general use;
- GB/T 11718-2009 Medium density fibreboard;
- GB/T 15102-2006 Surface decorated wood - Based panels with paper
impregnated thermosetting resins;
- GB/T 15104-2006 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 1279-2008 Polyvinyl chloride film overlaid wood-based panels
- LY/T 1655-2006 Reconstituted decorative lumber;
- LY/T 1658-2006 Direct printing wood-based panel.

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