GB 28008-2011 English PDF (GB28008-2011)
GB 28008-2011 English PDF (GB28008-2011)
GB 28008-2011: Safety requirements of glass furniture
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
Safety Requirements of Glass Furniture
ISSUED ON. OCTOBER 31, 2011
IMPLEMENTED ON. AUGUST
Jointly Issued by the General Administration of Quality Supervision,
Quarantine of the People's Republic of China and the
Standardization Administration of the People's
Republic of China
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative Reference ... 4
3 Terms and Definitions ... 5
4 Product Classification ... 6
5 Requirements ... 7
6 Test Methods ... 13
7 Inspection Rules... 18
8 Marking, Operating Instruction, Packing, Transport and Storage ... 20 Safety Requirements of Glass Furniture
This standard specifies the terms, definitions, classification, requirements, test methods, test rules, marking, operating instruction, packing, transport and storage of glass furniture.
This standard is applicable to glass furniture. It may be implemented for the glass parts of other furniture by reference.
2 Normative Reference
The following referenced documents are indispensable for the application of this document. For dated references, only the dated edition applies. For undated references, the latest edition of the reference document (including any amendments) applies.
GB/T 308-2002 Rolling Bearings - Steel Balls
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 3324-2008 Wooden Furniture - General Technical Requirements
GB/T 3325-2008 Metal Furniture - General Technical Requirements
GB/T 4893.3 Furniture - Assessment of Surface Resistance to Dry Heat
GB 5296.6 Instructions for Use of Products of Consumer Interest - Part 6. Furniture GB/T 8170 Rules of Rounding Off for Numerical Values & Expression and
Judgement of Limiting Values
GB/T 10357.1-1989 Test of Mechanical Properties of Furniture - Strength and Durability of Tables
GB/T 14155-2008 Door sets - Soft Heavy Body Impact Test
GB 15763.2-2005 Safety Glazing Materials in Building - Part 2. Tempered Glass GB 15763.3-2009 Safety Glazing Materials in Building - Part 3. Laminated Glass It refers to glass products mounted with organic film.
Heat bent glass
It refers to bent glass which is made by plate glass through hot briquetting by deadweight or balance weight on the bent body.
Heat strengthened glass
It refers to the glass which has a compressive stress layer formed on its surface due to controlled heating and cooling process, and its mechanical strength and heat shock resistance strength are improved and will be in special fragment state when broken. [GB/T 17841-2008, definition 3.1]
4 Product Classification
4.1 According to the main materials, glass furniture may be classified into the following..
a) Plate glass furniture;
b) Tempered glass furniture;
c) Heat strengthened glass furniture.
4.2 According to their ,usage, glass furniture may be classified into the following. a) Glass table;
b) Glass chairs and stools;
c) Glass showcase;
d) Glass sliding door.
4.3 According to the fixed mode of glass, glass furniture may be classified into the following.
a) Furniture with movable glass parts and structures, such as glass sliding door and glass showcase, etc.;
b) Furniture with fixed glass parts and structures, such as glass dining table and 5.5 Safety requirements for physical and chemical properties
5.5.1 Requirements for thermal shock resistance of tempered glass and its laminated glass parts
The tempered glass and its laminated glass parts of the glass furniture, which is frequently used outdoors and has requirements for high temperature resistance, shall meet the following requirements.
Tempered glass and its laminated glass shall be capable of resisting a temperature difference of 200??? without damage.
5.5.2 Requirements for thermal shock resistance of heat strengthened glass and its laminated glass parts
The heat strengthened glass and its laminated glass parts of the glass furniture, which is frequently used outdoors and has requirements for high temperature resistance, shall meet the following requirements.
Heat strengthened glass and its laminated glass shall be capable of resisting a temperature difference of 100??? without damage.
5.5.3 Requirements for dry heat resistance of glass part surface
Glass parts used for placing dining tools or with requirement of high temperature resistance shall meet the following requirements.
After 150??? dry heat test is carried out for the surface of glass parts, there shall be no crack or discoloring.
5.6 Requirement for harmful matter limit
The harmful matter limit in furniture shall be in accordance with those specified in GB 18584.
5.7 Safety requirements for wooden parts and metal parts
Relevant requirements of GB/T 3324-2008, GB/T 3325-2008 shall be met.
6 Test Methods
6.1 Inspection on safety requirements for performance and dimension
Take a product as the test sample and carry out visual inspection 600mm away from the test sample under good natural light and scattered light. Use a straight steel ruler with a minimum scale of 0.5mm and a vernier caliper with a minimum scale of 0.02mm the position of the center line of the longest edge of the test sample 20mm from the perimeter, and make the test sample crushed.
The measure for reserving fragment patterns shall be started 10s after the impact and finished in 3min.
While calculating the number of fragments, fragments within 80mm from the impact point radius and 25mm from the glass edge or drilling edge shall be deducted. Select the largest fragment portion according to patterns, and use a 50mm??50mm counting cell to calculate the fragment number inside the cell; each fragment shall be free from through crack, and fragments that cross the margin of counting cell shall be calculated as one half of fragment.
6.4.3 Shot-bag impact resistance test for tempered glass and its laminated glass parts
22.214.171.124 Test sample
Acquire a piece of glass with the maximum area on the furniture.
126.96.36.199 Test apparatus
The apparatus used shall be in accordance with those specified in GB 15763.3 or be provided with equivalent performance (the size of glass test cell may be changed according to the actual conditions); during the time, the clamp of the test cell shall only clamp the left and right sides of the test sample.
Use a flexible steel wire rope with a diameter of 3mm to hoist the impactor, and make the periphery of the maximum diameter part of the cross section of impactor within 13mm from the test sample surface and within 50mm from the center of the test sample. Maintain the central position of the maximum diameter of impactor at a drop height of 300mm and swing and drop it freely; the impactor shall impact near the center point of the test sample for once, and observe whether the test sample is damaged. 6.4.4 Measurement for surface stress of tempered glass parts
188.8.131.52 Test sample
Measurement shall be carried out according to the method specified in GB/T 18144 with a product as the test sample, and the apparatus shall be in accordance with those specified in GB/T 18144.
184.108.40.206 Requirements for measuring points
Measurement shall be carried out according to the method in 6.4.4 of this standard. 6.4.6 Impact property test for bearing table top parts
220.127.116.11 Test sample
Select the main bearing plate on the glass furniture product.
18.104.22.168 Test apparatus
Impact head shall be in accordance with those specified in 4.2.2 of GB/T 10357.1-1989. 22.214.171.124 Procedure
126.96.36.199.1 Use two sticks of batten or stick with relative hardness to support both sides of the glass sample on the two sticks of batten.
Note. Impact may also be carried out on the furniture product.
188.8.131.52.2 Lift the impact head at 240mm from the impact surface and drop it, and then observe the status of the impact surface.
6.4.7 Sandbag impact resistance test for floor type glass doors in glass furniture 184.108.40.206 Test sample
Take a whole piece of floor type glass door.
220.127.116.11 Test apparatus
The test apparatus shall be in accordance with those specified in Chapter 5 of GB/T 14155-2008, and apparatus with equivalent function may also be adopted. 18.104.22.168 Procedure
Swing the impactor to the position where the angel between it and the impact surface is 60??, and then release it to swing and impact the test sample; then observe the status of the test sample.
6.5 Test method for the safety requirements of physical and chemical properties 6.5.1 Thermal shock resistance of tempered glass and its laminated glass parts 22.214.171.124 Apparatuses
a) Air convection dry oven with a sensitivity of ??1???;
b) Cryogenic refrigerator, with a temperature down to -20???;
7.3.2 Sampling rule. within an inspection period, two sample shall be selected randomly from the products produced recently; one is used for inspection, and the other one is stored by sealing.
7.3.3 The inspection program shall comply with the principle of not affect the correctness of the rest inspection items as much as possible. In order to avoid repeat mechanical test on the same test sample, only one test item in the two test items for stress-bearing plate parts of tempered glass in 5.4.1 and 5.4.6 of this standard may be carried out.
7.4 Determination of inspection results
Where all the basic items are qualified and the unqualified number in general items does not exceed four, this product may be determined as qualified; otherwise, it shall be determined as unqualified.
7.5 Re-inspection rules
Where product is determined as unqualified in type inspection, the stored spare sample may be used for re-inspection. Inspection shall be carried out for unqualified items and items not inspected due to damage of specimen, and evaluation shall be carried out in accordance with those specified in 7.4, and "re-inspection" shall be noted in the inspection result.
8 Marking, Operating Instruction, Packing, Transport and
The product marking shall cover at least the following information.
a) Name, specification and model of product;
b) Names of main materials used and the serial number of standards applied; c) Inspection qualification and production date;
d) Name and address of the Manufacturer in Chinese.
8.2 Operating instruction
The preparation of the operating instruction shall meet the requirements of GB 5296.6-2004, and the content shall cover at least the following.
a) Name, model and specification of product, and serial number and grade of