QB/T 2280-2016 PDF English
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QB/T 2280-2016: Office furniture. Office chair---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/QBT2280-2016
QB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 97.140
Y 81
Record Number. 53766-2016
Replacing QB/T 2280-2007
Office Furniture-Office Chair
Issued on. JANUARY 15, 2016
Implemented on. JULY 1, 2016
Issued by. Ministry of Industry and Information Technology of the
People's Republic of China
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terminologies and Definitions... 6
4 Product Classification... 8
5 Requirements... 9
6 Test Methods... 17
7 Inspection Rules... 37
8 Marking, Packaging, Transportation and Storage... 39
Appendix A (Normative) 64kg Load Module... 41
Appendix B (Normative) Impact Bag... 42
1 Scope
This standard specifies the terminologies and definitions, product classification,
requirements, test methods, inspection rules and marking, packaging, transportation
and storage of office chairs.
This standard is applicable to office chairs; chairs of similar uses in other occasions
may refer to this standard.
2 Normative References
The following documents for the application of this document are essential. Any dated
reference, just dated edition applies to this document. For undated references, the
latest edition (including any amendments) applies to this document.
GB/T 2828.1 Sampling Procedures for Inspection by Attributes - Part 1.
Sampling Schemes Indexed by Acceptance Quality Limit (AQL)
for Lot-by-lot Inspection
GB/T 3325-2008 Metal Furniture - General Technical Requirements
GB/T 3920 Textiles - Tests for Colour Fastness - Colour Fastness to Rubbing
GB 5296.6 Instructions for Use of Products of Consumer Interest - Part 6.
Furniture
GB/T 6343 Cellular Plastics and Rubbers - Determination of Apparent
Density
GB/T 6669-2008 Flexible Cellular Polymeric Materials - Determination of
Compression Set
GB/T 6670-2008 Flexible Cellular Polymeric Materials - Determination of
Resilience by Ball Rebound
GB/T 9286 Paints and Varnishes - Cross Cut Test for Films
GB/T 10357.2 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 17927.1 Upholstered Furniture - Assessment of the Resistance to Ignition
of Mattress and Sofa - Part 1.Smouldering Cigarette
GB 17927.2 Upholstered Furniture - Assessment of the Resistance to Ignition
of Mattress and Sofa - Part 2.Match Flame Equivalent
GB/T
18204.2-2014
Examination Methods for Public Places - Part 2.Chemical
Pollutants
3 Terminologies and Definitions
For the purposes of this standard, the terminologies and definitions established in
GB/T 29525-2013 and the following ones apply.
3.1
Office chair
An individual chair used when doing office work.
3.2
Adjuster device
Mechanism changing the relative position, angle or rigidity of seat parts.
3.3
Locking device
Device which makes moving parts of chair in position and locks them up.
3.4
Shape symmetry
Extent of the error in symmetry planes where chair parts are located, diagonals or
circle diameter.
3.5
Seat plane deviation
The extent of the plane where the bilaterally symmetric points at seat's hard edge tilts
to the ground level.
3.6
Back eccentric
Distance between a vertical line through forced points at back top and a line through
support points at outermost side of base.
4 Product Classification
Office chairs are classified into the following types by adjustment mode.
5 Requirements
5.1 Main dimensions
Main product dimensions shall be in accordance with those specified in Table 1.See
Figures 4, 5 and 6 and Table 1 for codes and deviation requirements. The dimensions
with special requirements shall be indicated by the supplier and the purchaser in the
contract.
5.2 Shape and position tolerances
Product shape and position tolerances shall be in accordance with those specified in
Table 2.
5.3 Appearance
5.3.1 Appearance of plastic parts
5.3.5 Coating and plating
5.3.5.1 Wooden parts coating shall be flat and smooth without scratch, fog lights,
white ridge, flake, sagging, deposited powder, lag or visible color difference.*
5.3.5.2 Wooden parts coating shall be free from swelling, wrinkling, sticking and
holiday.
5.3.6 Other appearance requirements
5.3.6.1 The parts of the product shall be free from damage.
5.3.6.2 Fixed positions shall be joined firmly without looseness, lack of parts, nail
missing or exposure.
5.3.6.3 All the external angles of the product and positions in contact with human
body shall be blunted without burr, cutting edge or corner angle.
5.4 Physical and chemical properties
Physical and chemical properties of the product shall meet those specified in Table 3.
Table 3 -- Physical and Chemical Properties
5.5 Mechanical properties
Mechanical properties of the product shall meet those specified in Table 4.
5.8 TVOC
TVOC of office chair shall not be greater than 0.5 mg/m2h.
5.9 Safety (only applicable to office chair with gas spring)
5.9.1 Basic safety
Isolation measures shall be taken between the bottom of the seat and the gas spring,
steel plate or chassis not less than 2 mm in thickness may be adopted for isolation.
6 Test Methods
6.1 Precision
Unless otherwise specified, the following measuring precision shall be adopted.
6.2 Main dimensions
6.2.1 Determination of Point A
Put a 64 kg-load module (see Appendix A) on the seat with center line as symmetry
plane, ensuring that the center of guiding axle of the main weight is consistent with the
center of the seat's rotation axle. Before the test, the seat shall be loaded before being
unloaded, repeat 5 times.
6.2.3 Seat height
As shown in Figure 8, put the seat on a flat and hard plate, determine Point A with a
64 kg-load module (see Appendix A), measure the distance from Point A to the plate
H1 (see Figure 8).
6.2.4 Lift travel
Measure the highest seat height and the lowest seat height in accordance with 6.2.3,
and calculate the difference.
6.2.5 Other main dimensions
Other main dimensions shall be determined according to the requirements of 5.1 in
GB/T 3325-2008.
6.3 Shape and position tolerances
6.3.1 Back eccentricity
Rotate the test piece to where it is easiest to overturn, measure the horizontal
distance e between the connecting line of support points at the outermost side of the
base and vertical lead of the force bearing point, d, at the top of the back.
6.3.2 Shape symmetry
Measure the distance between two diagonals of the symmetry plane (component),
then measure the distance between support points of support castor for the base, and
the difference between them is the shape symmetry.
6.4 Appearance
6.4.1 Decoloration
Inspect 3 positions on the product's external finished parts or plastic parts, wipe each
position with white soft damp cloth or white degreased gauze properly for 3 times for a
distance of 200 mm ~300 mm. Observe if the soft damp cloth or white degreased
gauze has the color of the finished parts.
6.5 Physical and chemical properties
6.5.1 Flexible polyurethane foam
6.5.2 Color fastness to dry friction of textile fabric
It shall be tested according to the requirements of GB/T 3920.
6.5.3 Metal parts coating
6.5.3.1 Resistance to salt spray
It shall be tested according to the requirements of QB/T 3826.
6.5.3.2 Adhesive force
It shall be tested according to the requirements of GB/T 9286.
6.5.4 Resistance to salt spray of galvanized coating
It shall be tested according to the requirements of QB/T 3826.
6.6 Mechanical property
6.6.1 Stability
It shall be tested according to the requirements of GB/T 10357.2.
6.6.3 Static load on seat and back
6.6.3.1 Static load on seat
It shall be tested according to the requirements of 4.3.1 in GB 10357.3-2013.
6.6.3.2 Static load on back
It shall be tested according to the requirements of 4.3.2 in GB 10357.3-2013.
6.6.6 Reciprocating abrasion on castor
Connect the chair and the circulating equipment together.
Put the chair on a hard and smooth surface with 3 obstacles (see Figure 14), as
shown in Figure 15.
6.6.7 Static load on base
As shown in Figure 17, put inside steel block or other similar supporting objects
instead of roller / sliding feet (roller / sliding toe pool may be kept). The axis of roller /
sliding feet provides support. The height of the steel block or supporting object shall
be enough for the central axis or chair leg not to touch the test bed in the test process.
Remove the support device and height adjusting device on the base. Directly load on
the support bar in a vertical way, or apply load vertically by conical test device or the
test device similar to base interface.
6.10 Safety
6.10.1 Basic safety
The steel plate thickness shall be measured by straight steel ruler or tape with division
value of 1mm.
6.10.2 Sealing performance
Remove the parts above the seat of the sample.
Keep the gas spring compressed, then measure the seat height according to 6.2.3;
and measure the seat height again according to 6.2.3 after storing for 72 h at normal
temperature.
6.10.3 High and low temperature resistance
The prepared sample shall be subjected to high/low temperature treatment. firstly, put
it into a (-30±2)℃ low temperature test chamber for 48h, take it out, then put it into a
(60±5)℃ high temperature test chamber for another 48h. Take out the gas spring and
calculate the decrement of its nominal force Fa.
6.10.4 Cycle life
The gas spring piston rod undergone high/low temperature storage test shall be
clamped on the testing machine downward for cycling life test at the frequency of 8
times / min - 12 times / min, and the temperature of the wall of outer drum shall not be
larger than 50℃ during the test. After cycling for 50,000 times, measure the
decrement of nominal force Fa.
7 Inspection Rules
7.1 Inspection classification
Product inspection may be classified into type inspection and end-of-manufacturing
inspection. Type inspection evaluates the compliance of all inspection items in
addition to those specified in the contract. While end-of-manufacturing inspection
judges the compliance of the items specified in 5.1, 5.2 and 5.4 of this standard.
7.2 End-of-manufacturing inspection
7.2.1 End-of-manufacturing inspection shall be carried out at the end of
manufacturing of the product or in case of delivery. The items specified in 5.1, 5.2 and
5.3 of this standard are end-of-manufacturing inspection items.
7.2.3 End-of-manufacturing inspection shall be carried out by the quality inspection
department of the enterprise within the validity of the type inspection of product.
7.2.4 All the inspection items without "*" in main dimension, tolerances of form and
position and appearance are qualified; while those with "*" and with no more than 5
defects are judged as qualified in the end-of-manufacturing inspection, otherwise they
shall be judged as unqualified.
7.2.5 Unqualified products shall not leave the factory.
7.3 Type inspection
7.3.1 Type inspection is about comprehensive assessment on product quality. Type
inspection shall be carried out under one of the following conditions.
7.3.2 Sampling and product grouping rules
In sampling, 7 samples, 1 component base, 1 gas spring and a set of castor shall be
randomly taken from the same batch within an inspection period, except that 3
samples shall be sealed for storing, the rest shall be delivered for inspection. If the
supplier and the purchaser have other contract provisions, then samples shall be
taken according to those specified in the Contract.
7.3.5 Reinspection
7.3.5.1 Re-inspection may be carried out in case either party has disagreement on
the inspection results during inspection and to the objectionable items of un-accepted
products within the specified period during delivery.
7.3.5.2 Re-inspection shall be directly carried out to stand-by samples.
7.3.5.3 The items unqualified last time or failing to be inspected last time due to
damage of sample shall be subjected to re-inspection and noted with "re-inspected" in
the report.
8 Marking, Packaging, Transportation and Storage
8.1 Marking
The products shall be provided with marking and application instruction, and shall
meet the requirements of GB 5296.6.The contents of product instructions shall at
least include.
8.2 Packaging
The product shall be appropriately packaged to avoid damage.
8.3 Transportation
The products shall be provided with gasket and cover during transportation to avoid
damage, sun and rain.
8.4 Storage
The products shall be stored in the well-ventilated, dry and clean environment to avoid
contamination, sun and rain.
QB/T 2280-2016
QB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 97.140
Y 81
Record Number. 53766-2016
Replacing QB/T 2280-2007
Office Furniture-Office Chair
Issued on. JANUARY 15, 2016
Implemented on. JULY 1, 2016
Issued by. Ministry of Industry and Information Technology of the
People's Republic of China
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terminologies and Definitions... 6
4 Product Classification... 8
5 Requirements... 9
6 Test Methods... 17
7 Inspection Rules... 37
8 Marking, Packaging, Transportation and Storage... 39
Appendix A (Normative) 64kg Load Module... 41
Appendix B (Normative) Impact Bag... 42
1 Scope
This standard specifies the terminologies and definitions, product classification,
requirements, test methods, inspection rules and marking, packaging, transportation
and storage of office chairs.
This standard is applicable to office chairs; chairs of similar uses in other occasions
may refer to this standard.
2 Normative References
The following documents for the application of this document are essential. Any dated
reference, just dated edition applies to this document. For undated references, the
latest edition (including any amendments) applies to this document.
GB/T 2828.1 Sampling Procedures for Inspection by Attributes - Part 1.
Sampling Schemes Indexed by Acceptance Quality Limit (AQL)
for Lot-by-lot Inspection
GB/T 3325-2008 Metal Furniture - General Technical Requirements
GB/T 3920 Textiles - Tests for Colour Fastness - Colour Fastness to Rubbing
GB 5296.6 Instructions for Use of Products of Consumer Interest - Part 6.
Furniture
GB/T 6343 Cellular Plastics and Rubbers - Determination of Apparent
Density
GB/T 6669-2008 Flexible Cellular Polymeric Materials - Determination of
Compression Set
GB/T 6670-2008 Flexible Cellular Polymeric Materials - Determination of
Resilience by Ball Rebound
GB/T 9286 Paints and Varnishes - Cross Cut Test for Films
GB/T 10357.2 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 17927.1 Upholstered Furniture - Assessment of the Resistance to Ignition
of Mattress and Sofa - Part 1.Smouldering Cigarette
GB 17927.2 Upholstered Furniture - Assessment of the Resistance to Ignition
of Mattress and Sofa - Part 2.Match Flame Equivalent
GB/T
18204.2-2014
Examination Methods for Public Places - Part 2.Chemical
Pollutants
3 Terminologies and Definitions
For the purposes of this standard, the terminologies and definitions established in
GB/T 29525-2013 and the following ones apply.
3.1
Office chair
An individual chair used when doing office work.
3.2
Adjuster device
Mechanism changing the relative position, angle or rigidity of seat parts.
3.3
Locking device
Device which makes moving parts of chair in position and locks them up.
3.4
Shape symmetry
Extent of the error in symmetry planes where chair parts are located, diagonals or
circle diameter.
3.5
Seat plane deviation
The extent of the plane where the bilaterally symmetric points at seat's hard edge tilts
to the ground level.
3.6
Back eccentric
Distance between a vertical line through forced points at back top and a line through
support points at outermost side of base.
4 Product Classification
Office chairs are classified into the following types by adjustment mode.
5 Requirements
5.1 Main dimensions
Main product dimensions shall be in accordance with those specified in Table 1.See
Figures 4, 5 and 6 and Table 1 for codes and deviation requirements. The dimensions
with special requirements shall be indicated by the supplier and the purchaser in the
contract.
5.2 Shape and position tolerances
Product shape and position tolerances shall be in accordance with those specified in
Table 2.
5.3 Appearance
5.3.1 Appearance of plastic parts
5.3.5 Coating and plating
5.3.5.1 Wooden parts coating shall be flat and smooth without scratch, fog lights,
white ridge, flake, sagging, deposited powder, lag or visible color difference.*
5.3.5.2 Wooden parts coating shall be free from swelling, wrinkling, sticking and
holiday.
5.3.6 Other appearance requirements
5.3.6.1 The parts of the product shall be free from damage.
5.3.6.2 Fixed positions shall be joined firmly without looseness, lack of parts, nail
missing or exposure.
5.3.6.3 All the external angles of the product and positions in contact with human
body shall be blunted without burr, cutting edge or corner angle.
5.4 Physical and chemical properties
Physical and chemical properties of the product shall meet those specified in Table 3.
Table 3 -- Physical and Chemical Properties
5.5 Mechanical properties
Mechanical properties of the product shall meet those specified in Table 4.
5.8 TVOC
TVOC of office chair shall not be greater than 0.5 mg/m2h.
5.9 Safety (only applicable to office chair with gas spring)
5.9.1 Basic safety
Isolation measures shall be taken between the bottom of the seat and the gas spring,
steel plate or chassis not less than 2 mm in thickness may be adopted for isolation.
6 Test Methods
6.1 Precision
Unless otherwise specified, the following measuring precision shall be adopted.
6.2 Main dimensions
6.2.1 Determination of Point A
Put a 64 kg-load module (see Appendix A) on the seat with center line as symmetry
plane, ensuring that the center of guiding axle of the main weight is consistent with the
center of the seat's rotation axle. Before the test, the seat shall be loaded before being
unloaded, repeat 5 times.
6.2.3 Seat height
As shown in Figure 8, put the seat on a flat and hard plate, determine Point A with a
64 kg-load module (see Appendix A), measure the distance from Point A to the plate
H1 (see Figure 8).
6.2.4 Lift travel
Measure the highest seat height and the lowest seat height in accordance with 6.2.3,
and calculate the difference.
6.2.5 Other main dimensions
Other main dimensions shall be determined according to the requirements of 5.1 in
GB/T 3325-2008.
6.3 Shape and position tolerances
6.3.1 Back eccentricity
Rotate the test piece to where it is easiest to overturn, measure the horizontal
distance e between the connecting line of support points at the outermost side of the
base and vertical lead of the force bearing point, d, at the top of the back.
6.3.2 Shape symmetry
Measure the distance between two diagonals of the symmetry plane (component),
then measure the distance between support points of support castor for the base, and
the difference between them is the shape symmetry.
6.4 Appearance
6.4.1 Decoloration
Inspect 3 positions on the product's external finished parts or plastic parts, wipe each
position with white soft damp cloth or white degreased gauze properly for 3 times for a
distance of 200 mm ~300 mm. Observe if the soft damp cloth or white degreased
gauze has the color of the finished parts.
6.5 Physical and chemical properties
6.5.1 Flexible polyurethane foam
6.5.2 Color fastness to dry friction of textile fabric
It shall be tested according to the requirements of GB/T 3920.
6.5.3 Metal parts coating
6.5.3.1 Resistance to salt spray
It shall be tested according to the requirements of QB/T 3826.
6.5.3.2 Adhesive force
It shall be tested according to the requirements of GB/T 9286.
6.5.4 Resistance to salt spray of galvanized coating
It shall be tested according to the requirements of QB/T 3826.
6.6 Mechanical property
6.6.1 Stability
It shall be tested according to the requirements of GB/T 10357.2.
6.6.3 Static load on seat and back
6.6.3.1 Static load on seat
It shall be tested according to the requirements of 4.3.1 in GB 10357.3-2013.
6.6.3.2 Static load on back
It shall be tested according to the requirements of 4.3.2 in GB 10357.3-2013.
6.6.6 Reciprocating abrasion on castor
Connect the chair and the circulating equipment together.
Put the chair on a hard and smooth surface with 3 obstacles (see Figure 14), as
shown in Figure 15.
6.6.7 Static load on base
As shown in Figure 17, put inside steel block or other similar supporting objects
instead of roller / sliding feet (roller / sliding toe pool may be kept). The axis of roller /
sliding feet provides support. The height of the steel block or supporting object shall
be enough for the central axis or chair leg not to touch the test bed in the test process.
Remove the support device and height adjusting device on the base. Directly load on
the support bar in a vertical way, or apply load vertically by conical test device or the
test device similar to base interface.
6.10 Safety
6.10.1 Basic safety
The steel plate thickness shall be measured by straight steel ruler or tape with division
value of 1mm.
6.10.2 Sealing performance
Remove the parts above the seat of the sample.
Keep the gas spring compressed, then measure the seat height according to 6.2.3;
and measure the seat height again according to 6.2.3 after storing for 72 h at normal
temperature.
6.10.3 High and low temperature resistance
The prepared sample shall be subjected to high/low temperature treatment. firstly, put
it into a (-30±2)℃ low temperature test chamber for 48h, take it out, then put it into a
(60±5)℃ high temperature test chamber for another 48h. Take out the gas spring and
calculate the decrement of its nominal force Fa.
6.10.4 Cycle life
The gas spring piston rod undergone high/low temperature storage test shall be
clamped on the testing machine downward for cycling life test at the frequency of 8
times / min - 12 times / min, and the temperature of the wall of outer drum shall not be
larger than 50℃ during the test. After cycling for 50,000 times, measure the
decrement of nominal force Fa.
7 Inspection Rules
7.1 Inspection classification
Product inspection may be classified into type inspection and end-of-manufacturing
inspection. Type inspection evaluates the compliance of all inspection items in
addition to those specified in the contract. While end-of-manufacturing inspection
judges the compliance of the items specified in 5.1, 5.2 and 5.4 of this standard.
7.2 End-of-manufacturing inspection
7.2.1 End-of-manufacturing inspection shall be carried out at the end of
manufacturing of the product or in case of delivery. The items specified in 5.1, 5.2 and
5.3 of this standard are end-of-manufacturing inspection items.
7.2.3 End-of-manufacturing inspection shall be carried out by the quality inspection
department of the enterprise within the validity of the type inspection of product.
7.2.4 All the inspection items without "*" in main dimension, tolerances of form and
position and appearance are qualified; while those with "*" and with no more than 5
defects are judged as qualified in the end-of-manufacturing inspection, otherwise they
shall be judged as unqualified.
7.2.5 Unqualified products shall not leave the factory.
7.3 Type inspection
7.3.1 Type inspection is about comprehensive assessment on product quality. Type
inspection shall be carried out under one of the following conditions.
7.3.2 Sampling and product grouping rules
In sampling, 7 samples, 1 component base, 1 gas spring and a set of castor shall be
randomly taken from the same batch within an inspection period, except that 3
samples shall be sealed for storing, the rest shall be delivered for inspection. If the
supplier and the purchaser have other contract provisions, then samples shall be
taken according to those specified in the Contract.
7.3.5 Reinspection
7.3.5.1 Re-inspection may be carried out in case either party has disagreement on
the inspection results during inspection and to the objectionable items of un-accepted
products within the specified period during delivery.
7.3.5.2 Re-inspection shall be directly carried out to stand-by samples.
7.3.5.3 The items unqualified last time or failing to be inspected last time due to
damage of sample shall be subjected to re-inspection and noted with "re-inspected" in
the report.
8 Marking, Packaging, Transportation and Storage
8.1 Marking
The products shall be provided with marking and application instruction, and shall
meet the requirements of GB 5296.6.The contents of product instructions shall at
least include.
8.2 Packaging
The product shall be appropriately packaged to avoid damage.
8.3 Transportation
The products shall be provided with gasket and cover during transportation to avoid
damage, sun and rain.
8.4 Storage
The products shall be stored in the well-ventilated, dry and clean environment to avoid
contamination, sun and rain.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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