Some standard content:
National Standard of the People's Republic of China
Toughened safety glass for ships
Toughened safety glass for shipsGB 11946—89
This standard refers to the international standards IS01095--1976 "Toughened safety glass for ship windows" and ISO3254-1975 "Toughened safety glass for rectangular windows on ships".
Subject content and scope of application
This standard specifies the materials, types, interchangeable dimensions, tolerances, appearance quality, curvature, optical properties, punching strength, test methods, inspection rules, markings, etc. of toughened safety glass for ships. This standard applies to toughened safety glass used for ship windows and rectangular windows. Note: Toughened safety glass is safety glass made by heating and rapidly cooling flat glass. If the glass breaks, it will split into small rounded pieces. In addition, its tendency to break under external forces or temperature changes is greatly reduced. 2 Reference standards
GB1216
GB3385
GB 4871
GB 11614
GJB503
JB2546
3 Classification
Outside micrometer
Non-destructive strength test of tempered safety glass for ship glare window and rectangular window Punching method
Ordinary flat glass
Float glass
General test method for laminated glass of aircraft
Steel ruler
Classification by use:
Tempered safety glass for glare window.
Tempered safety glass for rectangular window.
3.2 Classification by processing status and its code are shown in Table 1. Table 1
Transparent glass
Opaque glass (glass treated by sandblasting or grinding, also known as frosted glass) 3.3
See Table 2 for the classification and code of material types. Table 2
Ordinary flat glass
Float glass or polished glass
Approved by the State Administration of Technical Supervision on December 23, 1989 424
Implemented on July 1, 1990
3.4 Marking:
Glass is marked according to the following example
4 Size
Toughened safety glass for ship windows
GB 11946
Nominal diameter 300mm. Thickness 12mm. Opaque glass made of ordinary flat glass: glass 300-12-Z2-GB11946
Tempered safety glass for shaped windows
Nominal size 450mm×630mm. Thickness 8mm, transparent glass made of float or polished glass: glass 450×630-8-Y1-GB11946
The true diameter and thickness of tempered safety glass for shaped windows are shown in Figure 1 and Table 3. 4.7
Figure 1 Tempered safety glass for shaped windows
t--Glass diameter; !--Glass nominal thickness Table 3
Minimum diameter
Maximum diameter
Note: For the following transparent glass and opaque glass, ×) is for the following opaque glass. 1) The nominal diameter is the diameter of the light-transmitting part of the general window. 4.2 The dimensions of tempered safety glass for lenticular windows are shown in Figure 2 and Table 4. 10
Nominal dimensions\)
300×425
355×500
400×560
450×630
500×710
560X800
900X630
1000×710
1100×800
GB11946-89
Figure 2 Tempered safety glass for rectangular windows
w—width of glass; h—length of glass, t—nominal thickness of glass; r—radius of fillet of glass Table 4
Note: × is applicable to both transparent glass and opaque glass; (×) is applicable only to opaque glass. 1) The nominal size is the size of the light-transmitting part of the window. 5 Technical requirements
5.1 Materials
The original glass used to manufacture tempered safety glass shall comply with the provisions of GB4871 and GB11614. 5.2
Edge processing
The edges of the glass shall be ground and chamfered, and the dimensions of the processed glass shall comply with the dimensions specified in Table 3 and Table 4. The chamfer shall comply with the provisions of Figure 3 and Table 5. The chamfer and edge grinding shall be finely ground and carried out before tempering. 426
Thickness tolerance
GB 11946-89
Figure 3 Edge processing
8—Chamfer width; -Chamfer depth; Glass thickness Table 5
The thickness tolerance of tempered safety glass for windows and rectangular windows is shown in Table 6. Table 6
5.4 Appearance quality
Float glass and polished glass
The appearance quality of marine tempered safety glass shall comply with the provisions of Table 7. Table 7
Defect name
Length not more than 0.8mm
Gas greater than 0.8mm
Tempered safety glass for navigation room and observation room windowsSuperior products
Qualified products
Not allowed to be densely packed"When the product area is less than
0.6m2, it is not allowed to exist; when the product area is greater than
0. 6 ㎡2, it is allowed to have a length of less than 2 mm bubbles
In a circle with a diameter of 500mm
, one bubble with a length less than
2mm is allowed
Ordinary flat glass
Tempered safety glass for other windows
Superior products
In a circle with a diameter of 500mm
, two bubbles with a length not exceeding
5mm or a circular
bubble with a diameter
not exceeding 3mm are allowed
Qualified products
In a circle with a diameter of 500mm
, one bubble with a length not exceeding
8mm or a circular
bubble with a diameter
not exceeding 4mm is allowed
Defect name
Light scratches (visible scratches
less than 0.1mm)
Width 0.1 ~ 0. 5mm scratch
Bright spot on opaque glass 2)
Location of clamp mark
GB 11946-89
Continued Table 7
Superior quality tempered safety glass for cab and observation room windows
Qualified quality
Tempered safety glass for other windows
Shall not affect the use
1 When the product area is less than 0.8m2, the total length within a circle with a diameter of 300mm shall not exceed the total length within a circle with a diameter of 300mm.
The total length within a circle with a diameter of 300mm shall not exceed 10mm
Not allowed
No regulations within 25mm from the periphery
The number of sand particles smaller than 0.5mm is allowed within a circle with a diameter of 500mm
Each product is allowed to have 4 cracked edges with a length not exceeding 20mm, extending inward from the edge surface of the glass plate not exceeding 4mm, and extending from the plate surface in the direction of the glass thickness not exceeding half the thickness
The distance from the edge shall not be greater than 10mm
Note: 1) Dense means that the number of defects is three or more, and the spacing is not greater than 50 mm. 2) Filling spot refers to the transparent part of the opaque glass surface that has not been ground. 5.5
Bending degree
The curvature of marine tempered safety glass h×100% shall not exceed the provisions of Figure 4 Table 8 Figure 4 Curvature
9--arc height of curved glass, h-chord length of curved glass Table 8
Thickness! mm
Curvature, %
Thickness t, mm
5.6 Transmittance
GB11946-89
Continued Table 8
The transmittance of transparent marine tempered safety glass shall comply with the provisions of Table 9. The transmittance of glass in other parts is not specified. Table 9
Glass usage position
Cab
Observation room
5.7 Optical angular displacement
Bending degree.%
The optical angular displacement of tempered safety glass used in cab windows and observation room windows shall comply with the provisions of Table 10. Table 10
5.8 Compression strength
Degree t, mm
The compression strength of glass shall comply with the provisions of GB3385. 6 Inspection method
6.1 Dimensions and thickness
Optical angular displacement, minutes (\)
≥73%
The length, width and diameter of marine tempered safety glass shall be measured with a steel ruler with a minimum scale of 1mm as specified in JB2546 or a measuring tool of equivalent accuracy. The thickness shall be measured at the midpoints of the four sides of the glass with a dry ruler as specified in GB1216. For glare window glass, measure four points along the periphery at 90°. The result is expressed as the average of four points, and the value should be rounded to one decimal place. 6.2 Appearance
Under good natural light or scattered light lighting conditions, observe with the naked eye at a distance of 60 cm from the glass surface. If necessary, use a reading microscope or other measuring tools to check the defects on the surface and inside of the glass. 6.3 Curvature
Put the glass plate upright, and then place the straight edge of the steel ruler horizontally against the edge of the glass. Use a feeler gauge to measure the maximum gap between the straight edge of the steel ruler and the edge of the glass. The curvature is expressed as the percentage of the ratio of the arc height (g) to the chord length (h). 6.4 Transmittance
Use three pieces of products or samples made of the same material and the same process as the products to measure according to Chapter 10 of GJB503 or other equivalent methods. 6.5 Optical angular displacement
Use four pieces of products to measure according to Chapter 11 of GJB503. 6.6 Punching strength
Test according to GB3385.
7 Inspection rules
7.1 Inspection classification
7.1.1 Type inspection
GB11946-89
The inspection items are all the items specified in the technical requirements of this standard. 7.1.2 Factory inspection
The inspection items are appearance quality, dimensional tolerance, curvature, and punching strength. 7.2 Sampling and batching
The appearance quality, dimensional tolerance, curvature and punching strength inspection of products shall be randomly sampled according to Table 11. For other technical performances required by the product, randomly select products from the batch for inspection according to the quantity required by the inspection items. When the batch of products is larger than 500 pieces, they shall be sampled in batches of 500 pieces each.
Batch range
16~25
91~150
151~280
281~500
7.3 Judgment rules
Number of random inspections
Number of qualified judgments
Number of unqualified judgments
If the number of unqualified products in any of the appearance quality, dimensional deviation, and curvature is equal to or greater than the number of unqualified judgments in Table 11, the batch of products is considered to be unqualified in that item. If the stamping strength of one sample is unqualified, the performance is unqualified. Transmittance and optical angular displacement shall comply with the provisions of Articles 5.6 and 5.7, otherwise, the performance of the batch of products is considered to be unqualified. If one of the above items is unqualified, the batch of products is unqualified. 8 Marking, packaging, transportation and storage
8.1 Marking
The marking on each piece of marine tempered safety glass shall be carried out in accordance with the provisions of Chapter 5 of GB3385. Each packaging box shall have the product mark, quantity, factory name or trademark, and shall be marked with the words "point up, move with care, be careful of breakage" etc. 8.2 Packaging
The products shall be packed in containers or wooden boxes, and each piece of glass shall be wrapped in plastic bags or paper. The space between the glass and the packaging box shall be filled with light and soft materials that are not likely to cause appearance defects such as scratches on the glass. Specific requirements shall comply with relevant national standards. 8.3 Transportation
During transportation, the wooden box shall not be placed flat or tilted, the length direction shall be the same as the direction of vehicle movement, and rain protection measures shall be taken. 8.4 Storage
The product shall be stored vertically in a dry room. 430
GB 11946---89
Appendix A
Tempered safety glass for windows and rectangular windows
Maximum pressure after installation
(reference)
Transparent tempered safety glass for rectangular windows installed on windows or on four sides should withstand a certain pressure, and its maximum pressure value H is specified in Table A of A1
Nominal size
Rectangular window
300×425
355×500
400×560
450×630
5 00×710
560×800
900×630
1000×710
1100×800
Maximum pressure H, kPabZxz.net
Nominal thickness of glass, mm
Note: If the dimensions are not within the range specified in Table A1, the maximum pressure that the cab window glass installed on the four sides should withstand can be calculated according to the method specified in A2. 2 If one or two dimensions of the cab window are different from the dimensions specified in Table A1, the maximum pressure shall be determined according to formula (A1): A2
Where: H -
Design pressure, kPa;
Nominal thickness of glass, mm;
B—Coefficient obtained from the curve in Figure A1;
Minor size of the window, mm.
4 000t2
·(A1)
Additional notes:
GB11946-89
Window size ratio (long side: short side)
Curve for determining coefficient β based on window size This standard was proposed by the State Building Materials Industry Bureau. This standard was drafted by the Glass Research Institute of China Building Materials Science Research Institute. The main drafters of this standard were Liu Zhijun and Gong Shuyi. 4324 Storage
The product should be stored vertically in a dry room. 430
GB 11946---89
Appendix A
Toughened safety glass for windows and rectangular windows
Maximum pressure after installation
(reference)
Transparent toughened safety glass for rectangular windows installed on windows or on four sides should withstand a certain pressure, and its maximum pressure value H is specified in Table A of A1
.
Nominal size
Rectangular window
300×425
355×500
400×560
450×630
500×710
560×800
900×630
1000×710
1100×800
Maximum pressure H, kPa
Nominal thickness of glass, mm
Note: If the size is not within the range specified in Table A1, the maximum pressure that the cab window glass installed on the four sides should withstand can be calculated according to the method specified in A2. 2 If one or two dimensions of the cab window are different from the dimensions specified in Table A1, the maximum pressure shall be determined according to formula (A1): A2
Where: H -
Design pressure, kPa;
Nominal thickness of glass, mm;
B—Coefficient obtained from the curve in Figure A1;
Minor size of the window, mm.
4 000t2
·(A1)
Additional notes:
GB11946-89
Window size ratio (long side: short side)
Curve for determining coefficient β based on window size This standard was proposed by the State Building Materials Industry Bureau. This standard was drafted by the Glass Research Institute of China Building Materials Science Research Institute. The main drafters of this standard were Liu Zhijun and Gong Shuyi. 4324 Storage
The product should be stored vertically in a dry room. 430
GB 11946---89
Appendix A
Toughened safety glass for windows and rectangular windows
Maximum pressure after installation
(reference)
Transparent toughened safety glass for rectangular windows installed on windows or on four sides should withstand a certain pressure, and its maximum pressure value H is specified in Table A of A1
.
Nominal size
Rectangular window
300×425
355×500
400×560
450×630
500×710
560×800
900×630
1000×710
1100×800
Maximum pressure H, kPa
Nominal thickness of glass, mm
Note: If the size is not within the range specified in Table A1, the maximum pressure that the cab window glass installed on the four sides should withstand can be calculated according to the method specified in A2. 2 If one or two dimensions of the cab window are different from the dimensions specified in Table A1, the maximum pressure shall be determined according to formula (A1): A2
Where: H -
Design pressure, kPa;
Nominal thickness of glass, mm;
B—Coefficient obtained from the curve in Figure A1;
Minor size of the window, mm.
4 000t2
·(A1)
Additional notes:
GB11946-89
Window size ratio (long side: short side)
Curve for determining coefficient β based on window size This standard was proposed by the State Building Materials Industry Bureau. This standard was drafted by the Glass Research Institute of China Building Materials Science Research Institute. The main drafters of this standard were Liu Zhijun and Gong Shuyi. 432
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