GB 15763.2-2005 PDF English
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Safety glazing materials in building -- Part 2: Tempered glass
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GB 15763.2-2005: Safety glazing materials in building -- Part 2: Tempered glass---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/GB15763.2-2005
ICS 81.040
Q 33
GB
NATIONAL STANDARD
Replacing GB 9963-l998
Replacing GB 17841-l999 (Partial)
Safety Glazing Materials in Building –
Part 2.Tempered Glass
Issued on. AUGUST 30, 2005
Implemented on. MARCH 1, 2006
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine (AQSIQ);
Standardization Administration (SAC) of the People's
Republic of China
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Definition and Classification... 5
4 Glass Used for Tempered Glass... 6
5 Requirements... 6
6 Test Method... 11
7 Inspection Rules... 15
8 Marking, Packaging, Transportation and Storage... 16
Appendix A (Informative) Relevant Explanation for Tempered Glass... 18
1 Scope
This part of GB 15763 specifies the classification, technical requirements, test methods and
inspection rules of the tempered glass which is used in building and is fabricated by heat
treatment process.
This part of GB 15763 is applicable to the tempered glass which is used in building and is
fabricated by heat treatment process. As for tempered glasses for other purposes other than
building (such as industrial equipment, furniture, etc.), if there is no corresponding product
standard, this standard may be adopted by reference according to their product features.
2 Normative References
The following standards contain provisions which, through reference in this part, constitute
provisions of this part. For dated reference, subsequent amendments (excluding corrections),
or revisions of any of these publications do not apply. However, the parties who enter into
agreement based on this part are encouraged to investigate the possibility of applying the
most recent editions of the standards. For undated references, the latest edition of the
normative document referred to applies.
GB 9962-1999 Laminated Glass
GB 11614 Float Glass
GB/T 18144 Test Method for Measurement of Stress in Glass
3 Definition and Classification
3.1 Definition
Tempered glass. it refers to the glass undergone heat treatment process. It is characterized by
a compressive stress layer formed on its surface. Its mechanical strength and thermal shock
resistance strength are improved. And it has special characteristics of fragmentation.
3.2 Classification
3.2.1 Tempered glass may be classified into the following types by production process.
Tempered glass fabricated with vertical method. the tempered glass fabricated by method of
clamping and hanging, during the tempering process.
Tempered glass fabricated with horizontal method. the tempered glass fabricated by method
of horizontal roller support, during the tempering process.
3.2.2 Tempered glass may be classified into plane tempered glass and curved surface
tempered glass, by shape.
4 Glass Used for Tempered Glass
As for the glass used for tempered glass, its quality shall meet the requirements specified in
corresponding product standard. As for glass used for tempered glass with special
requirements, its quality shall be determined by the Supplier and the Purchaser.
5 Requirements
All the performances and test methods of tempered glass shall be in accordance with those
specified in Table 1.In which, the safety performance requirements are compulsory.
5.1 Dimension and permissible deviation
5.1.1 Side length permissible deviation of rectangular plane tempered glass
The side length permissible deviation of rectangular plane tempered glass shall meet those
specified in Table 2.
5.1.2 Diagonal line deviation of rectangular plane tempered glass
The diagonal line deviation of rectangular plane tempered glass shall meet those specified in
Table 3.
5.1.3 Dimensions and permissible deviation of tempered glasses in other shapes
Determined through negotiation of the Supplier and the Purchaser.
5.1.4 Processing of sides
The shape and quality of side processing shall be determined through negotiation of the
Supplier and the Purchaser.
5.1.5 Round hole
5.2 Thickness and permissible deviation
5.2.1 Permissible thickness deviation of tempered glass shall meet those specified in Table 5.
Table 5 Thickness and Permissible Deviation In mm
5.2.2 For glass of which the nominal thickness is not specified in Table 5, its permissible
thickness deviation may adopt the requirements for glasses of which the thickness is adjacent
to and is thinner, or it may be determined through negotiation of the Supplier and the
Purchaser.
5.3 Appearance quality
Appearance quality of tempered glass shall meet those specified in Table 6.
5.4 Degree of curvature
As for the curvature degree of plane tempered glass, it shall not exceed 0.3% if the glass is
arch-shaped, and not exceed 0.2% if the glass is wave-shaped.
5.5 Impact resistance
Take 6 tempered glasses for test. If there is not more than 1 test sample damaged, it is deemed
as qualified. If there are 3 or more test samples damaged, it is deemed as unqualified.
If the damaged samples are 2, it may take another 6 glasses for re-test. If all samples are not
damaged, it is deemed as qualified.
5.7 Shot-bag impact performance
Take 4 flat pattern glass specimens for test. 1 of the following items 1) or 2)) shall be met.
5.9 Thermal shock resistance performance
Tempered glass shall be capable of withstanding a temperature difference of 200ºC without
damage.
6 Test Method
6.1 Dimension inspection
Dimensions shall be measured with the straight steel ruler or steel tape (the minimum scale is 1mm).
6.2 Thickness inspection
Use outside micrometer or the tool with equivalent accuracy, measurement at midpoints of
the 4 sides at 15mm away from the glass sides. Arithmetic average of measuring results is the
thickness value which shall be rounded to 2 digits after the decimal point (in mm).
6.3 Appearance inspection
The inspection shall be conducted on specimen taken from finished products according to the
method specified in GB 11614.
6.4 Measurement curvature degree
The specimen shall be placed at room temperature for more than 4h. During measurement, the
specimen shall be vertical, and 2 cushion blocks shall be padded at lower 1/4 the side length.
A straight rule or metal wire shall be used to close fit either sides or diagonal lines of the
product, and the spacing between straight side and glass shall be measured with a feeler gauge.
The degree of curvature (arch-shaped) shall be expressed by the percentage of ratio of arch
height to chord length.
6.5 Impact resistance test
6.5.1 Test specimen shall be the plane tempered glass - same thickness, same type,
fabricated with the same process conditions of finished products, and dimension of 610mm
(-0mm, +5mm)×610mm (-0mm, +5mm).
6.5.2 Test equipment shall comply with the requirements specified in Appendix A of GB
9962-1999.The impact surface shall be kept horizontal. When testing curved surface
tempered glass, corresponding auxiliary frame is required for supporting.
6.5.3 A smooth-surface steel ball with a diameter of 63.5mm (mass is about 1040g) shall be
placed at 1000mm above the surface of the test specimen. Let it fall freely. The impact point
shall be within 25mm of the center of the specimen.
6.6 Fragment state test
6.6.1 Finished products shall be taken as specimen.
6.6.2 Test equipment
Any device capable of retaining the fragment pattern.
6.6.3 Test procedure
6.6.3.1 The tempered glass specimen shall be placed freely and flat on the test bed. Scotch
tape or other things shall be used to restrict the glass periphery, so as to avoid splashing of
glass fragments.
6.7 Shot-bag impact performance test
6.7.1 Specimen
Test specimen shall be the rectangular plane tempered glass - same thickness, same type,
fabricated with the same process conditions of finished products, and dimension of 1930mm
(-0mm, +5mm)×864mm (-0mm, +5mm).
6.7.2 Test device
Test device shall meet the requirements of Appendix B in GB 9962-1999.
6.7.3 Test procedure
6.7.3.1 The impact body shall be hoisted by using a flexible steel wire rope with a diameter
of 3mm. The distance between the periphery of the maximum diameter part of the cross
section of impact body AND specimen surface shall be less than 13mm. And it shall be less
than 50mm away from the specimen center.
6.8 Measurement of surface stress
6.8.1 Specimen
Measurement shall be conducted by taking finished products as specimen and according to
the method specified in GB/T 18144.
6.8.2 Requirements for measuring point
As shown in Figure 7, at distance of 100mm away from the long side, draw 2 parallel lines in
parallel to the long side, and intersect at 4 points with the diagonal lines, these 4 points and
the geometrical center of specimen are the measuring points.
6.8.3 Measuring result
The arithmetic average of values measured at each measuring point shall be the measuring
result.
6.9 Thermal shock resistance performance
Place the tempered glass specimen (300mm×300mm) in the dry oven at 200ºC±2ºC for more
than 4h, and then take it out and immediately immerse it vertically in 0ºC ice water mixture;
more than 1/3 of the specimen height shall be immersed in water, and observe whether the
glass is damaged after 5min.
7 Inspection Rules
7.1 Inspection item
Inspection is divided into delivery inspection and type inspection.
7.1.1 Type inspection
The safety performance requirements in the technical requirements are required inspection
items, other requirements shall be determined through negotiation between the Supplier and
the Purchaser.
7.1.2 Delivery inspection
The inspection items are thickness and deviation, appearance quality, dimension and deviation
and degree of curvature. Other inspection items shall be determined through negotiation
between Supplier and demander.
7.2 Sampling method by batching
7.3 Judgment rules
If the quantity of unqualified product is equal to or greater than the rejection number listed in
Table 8, the appearance quality, dimension deviation and degree of curvature of this batch of
products are deemed as unqualified.
Other performances shall also meet the corresponding requirements, otherwise they shall be
deemed as unqualified.
If one item in the above-mentioned items is unqualified, this batch of products shall be
deemed as unqualified.
8 Marking, Packaging, Transportation and Storage
8.1 Packaging
Wooden case or container (pallet) should be adopted for packaging, and the container (pallet)
shall facilitate loading, unloading and transportation. Glasses of the same thickness and
dimension shall be put into one container (pallet). Protective measures shall be adopted
between glasses as well as between glass and container (pallet) so as to avoid glass damage
and scratch on the glass surface.
8.2 Package mark
Package mark shall meet the requirements of relevant national standards. Such marks or
words as "Upward, Gently Handled and Normally Placed, Fragile, Keep Dry" shall be
indicated on each container.
8.3 Transportation
Glass shall be firmly fixed during transportation in order to prevent sliding and overturning;
rain-proof measures shall be adopted.
8.4 Storage
Product shall be stored in a place without moisture condensation or with rain-proof facilities.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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