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Insulating glass used on multiple units
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Basic data
| Standard ID | GB/T 39805-2021 (GB/T39805-2021) |
| Description (Translated English) | Insulating glass used on multiple units |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | Q34 |
| Word Count Estimation | 22,286 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GB/T 39805-2021: Insulating glass used on multiple units
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Insulating glass used on multiple units
ICS 81.040.01
Q34
National Standards of People's Republic of China
Hollow glass for EMU
Released on 2021-03-09
2021-10-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Category 1
5 Material 2
5.1 Glass 2
5.2 Edge sealing material 2
5.3 Spacer material 2
5.4 Desiccant 2
6 Requirements 2
6.1 Appearance quality 2
6.2 Dimensions and deviations 2
6.3 Thickness and deviation 2
6.4 Curvature 3
6.5 Goodness of fit 3
6.6 Diagonal difference 3
6.7 Stack Difference 3
6.8 Quality 3
6.9 Resistance to gravel impact 3
6.10 Anti-soft shock 4
6.11 Resistance to wind pressure fatigue 4
6.12 Optical distortion 4
6.13 Optical distortion angle 5
6.14 Dew point 5
6.15 Accelerated durability 5
6.16 Emergency window glass escape test 5
7 Test method 5
7.1 Appearance quality 5
7.2 Dimensions and deviations 5
7.3 Thickness and deviation 5
7.4 Curvature 5
7.5 Goodness of fit 5
7.6 Diagonal difference 6
7.7 Stack Difference 6
7.8 Quality 6
7.9 Resistance to gravel impact 6
7.10 Anti-soft shock 6
7.11 Resistance to wind pressure fatigue 7
7.12 Optical distortion 7
7.13 Optical distortion angle 7
7.14 Dew point test 7
7.15 Accelerated durability test 7
7.16 Emergency window glass escape test 7
8 Inspection rules 8
8.1 Inspection classification 8
8.2 Batching and sampling rules 8
8.3 Judgment Rule 9
9 Packaging, marking, transportation and storage 9
9.1 Packaging 9
9.2 Sign 9
9.3 Transport 10
9.4 Storage 10
Appendix A (informative appendix) Software diagram 11
Appendix B (Normative Appendix) Software impact and sample installation diagram 12
Appendix C (Normative Appendix) Optical Distortion Test 13
Appendix D (Normative Appendix) Accelerated durability test requirements 16
Hollow glass for EMU
1 Scope
This standard specifies the classification, materials, requirements, test methods, inspection rules and packaging, marking, transportation, and storage of insulating glass for EMUs
And so on.
This standard applies to hollow glass for side windows, side doors, blind windows and display windows of EMUs. Other rail transit products can be used as reference.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 1216 outside micrometer
GB/T 2828.1-2012 Sampling inspection procedures by attributes Part 1.Batch inspection sampling searched by acceptance quality limit (AQL)
plan
GB/T 6092 Square
GB/T 9056 Metal Ruler
GB 11614 flat glass
GB/T 11944-2012 insulating glass
GB/T 32056 Escape test method for emergency windows of high-speed EMUs
GB/T 32059 High-speed EMU windows and doors anti-wind load fatigue test method
GB/T 32060 High-speed EMU window glass anti-gravel impact test method
3 Terms and definitions
The following terms and definitions defined in GB/T 11944-2012 apply to this document.
3.1
Datumedge
The bottom of the glass when it is installed on the vehicle.
3.2
Dewpoint
The temperature at which condensation or frost begins to occur in the hollow glass cavity.
4 categories
According to the shape of the glass.
---Flat hollow glass;
---Bent hollow glass can be further subdivided into.
● Single-curved hollow glass;
● Other curved insulating glass.
5 materials
5.1 Glass
Can use flat glass, coated glass, laminated glass, tempered glass, fireproof glass, semi-tempered glass, etc. The glass used should meet the corresponding
standard requirement.
5.2 Edge sealing material
The sealing material for the edge of the insulating glass should meet the requirements of the corresponding standards, and should be able to meet the moisture and gas sealing performance of the insulating glass and be able to maintain
The structure of the insulating glass is stable. The bonding performance of the sealant and the water vapor permeability of the edge sealing material are in accordance with the appendix of GB/T 11944-2012
B. The method of Appendix C is determined.
5.3 Spacer material
The spacer materials can be aluminum spacers, stainless steel spacers, etc., and should meet the requirements of relevant standards and technical documents.
5.4 Desiccant
The desiccant should meet the requirements of relevant standards.
6 requirements
6.1 Appearance quality
The appearance quality of insulating glass should meet the requirements of Table 1.
6.2 Dimensions and deviations
The size and deviation should meet the requirements of the design drawing. When the drawing has no deviation requirements, the size deviation should meet the following requirements.
a) The insulating glass is placed in working condition, the bottom edge of each piece of glass should be on the same horizontal surface, and the maximum allowable deviation of the reference edge should be small
At 1mm;
b) The allowable size deviation of flat insulating glass is ±1.5mm;
c) The allowable deviation of curved single-curved insulating glass is ±3mm;
d) The allowable deviation of the length and width of other curved hollow glass shall be determined through negotiation between the supplier and the buyer.
6.3 Thickness and deviation
The allowable deviation of insulating glass with a nominal thickness of not more than 30mm shall meet the requirements of Table 2.Hollow glass with a nominal thickness greater than 30mm
6.13 Optical distortion angle
The optical distortion angle of flat hollow glass should not be less than 40°, and the optical distortion angle of curved hollow glass shall be negotiated by both parties.
6.14 Dew point
The dew point of insulating glass should be lower than -45℃.
6.15 Accelerated durability
After the test, the dew point of each sample should be lower than -40°C.
6.16 Emergency window glass escape test
The time for emergency window glass to form a safety exit should be less than 1 min.
7 Test method
7.1 Appearance quality
Test the products. Under good natural light or scattered light background lighting conditions, 500mm away from the front of the hollow glass,
Check visually. When determining the diameter of the appearance defect, use a reading microscope with a magnification of 10 times and an accuracy of not less than 0.1mm to measure;
When the length of the defect is measured, use a metal ruler with an accuracy of not less than 0.5mm.
7.2 Dimensions and deviations
The size and deviation are tested according to the following methods.
a) Flat insulating glass is measured with a length instrument with a minimum scale of 1mm.
b) The size of curved insulating glass is inspected with a sample inspection tool, and the sample should be approved by both the supplier and the buyer. Unless otherwise specified, usually
The empty glass is placed on the test fixture sample plate for inspection.
7.3 Thickness and deviation
Use an external micrometer with an accuracy of not less than 0.01mm in accordance with GB/T 1216 or an instrument with the same accuracy for measurement.
The rectangular hollow glass is measured at the midpoint of the four sides 15mm from the edge of the glass, and the arithmetic average of the measurement results is the thickness of the product; special-shaped hollow
The glass measuring point is negotiated by the supplier and the buyer.
7.4 Curvature
The bending test steps are as follows.
a) Place the products to be inspected vertically according to the actual installation method.
b) Place a metal ruler conforming to GB/T 9056 horizontally to the sample.
c) Use a feeler gauge with a reading accuracy of not less than 0.1mm to determine the maximum gap between the straight edge of the ruler and the glass.
d) The bow shape is expressed as a percentage of the ratio of the height of the arc to the length of the string; in the waveform, the height from the valley to the peak and the peak to the peak (or
The percentage of the ratio of the distance from the trough to the trough).
e) The two sides of the insulating glass should be measured separately, and the maximum value is taken as the curvature of the insulating glass.
7.5 Goodness of fit
Measure the curved product, place the product on the standard gauge (as shown in Figure 1), and use a plug with a reading accuracy of not less than 0.1mm
Ruler measures the gap between the glass sample and the gauge.
7.6 Diagonal difference
Use a length gauge with a minimum scale of 1mm to measure.
7.7 Overlap
When two pieces of glass are of the same size, use a square ruler that meets the GB/T 6092 standard, and one of the right-angled sides is measured closely to the side of the hollow glass.
On the surface of a piece of glass, the other right-angled edge is closely attached to the periphery of the glass, and the plug scale is used to measure the maximum gap between the edge of the glass and the inside of the
The large gap is used as the product stack difference.
When the sizes of two pieces of glass are different, measure the distance between the edge of the small glass and the edge of the large glass with the edge of the small glass as the reference.
The difference between the large distance and the minimum distance is regarded as the glass stack difference.
7.8 Quality
Use a scale with an accuracy of not less than 100g for measurement.
7.9 Resistance to gravel impact
Carry out the test according to the method specified in GB/T 32060.The sample should be kept at the required temperature for at least 12h. 3 consecutively were shocked
If the sample is not broken, it is qualified, and up to 6 samples can be impacted at each temperature.
7.10 Anti-soft shock
7.10.1 Software requirements
Use a tightly tied leather bag with a diameter of 3mm glass balls and a total mass of 50kg as a soft object. See Appendix A for the schematic diagram of the software.
As shown in A.1.
7.10.2 Test requirements
Use the product as a sample for testing. The impact height is 1.5m, and the impact form is swing impact. See Appendix B for impact and sample installation. test
After the test, the sample is qualified if it is not penetrated. Three samples should be tested, and all three samples should be qualified. When the sample size is less than 400mm×
When 400mm, use 400mm×400mm sample instead of test.
7.10.3 Installation of the sample
The specimens shall be tested for installation in accordance with Appendix B. The bracket for installing the sample is composed of 100mm×100mm aluminum profile, the sample and the profile
Add a rubber plate in the middle of the contact surface. The thickness of the rubber sheet is 3mm, the width is 15mm, and the Shore hardness is shoreA70.Use 8 M20 bolts
(Or C-type or F-type clamp) Clamp the sample with the pressure plate and the profile. The minimum torque of the bolt (or C-type or F-type clamp) is 30N·m.
The fixing method of the curved specimen shall be negotiated by the supplier and the buyer.
7.10.4 Test procedure
The test steps are as follows.
a) The sample should be tested after being placed for 4 hours under the temperature condition of 20℃±5℃;
b) Adjust the impact point, the soft impact point should be within 40mm of the center diameter of the sample;
c) If necessary, break the exterior glass of the sample with a suitable tool;
d) Lift the software in the manner specified in Appendix B;
e) After the software is stable, release the software for impact;
f) Only one impact per sample is allowed;
g) Check whether the sample is penetrated after impact.
7.11 Resistance to wind pressure fatigue
The sample should be a framed product, which should be tested according to the method specified in GB/T 32059, and one product of the same purpose and size should be tested.
7.12 Optical distortion
Take the product as a sample and test it in accordance with the method specified in Appendix C. Three products of the same purpose and size should be tested.
7.13 Optical distortion angle
Take the product as the sample, and test according to the method specified in GB 11614.The product of the same purpose and size should be tested 3 pieces.
7.14 Dew point test
Take the product as the sample, the sample is not less than 5, the test method is according to the dew point test method specified in GB/T 11944 or the electric refrigeration dew point test
The meter performs the measurement.
7.15 Accelerated durability test
7.15.1 Sample
The sample is hollow glass with a size of about 500mm×350mm, and the number is not less than 6 pieces.
7.15.2 Test equipment
Meet the requirements of Appendix D.
7.15.3 Test procedure
After measuring the dew point according to the method of 7.14, start the test. The test process is as follows.
Carry out 42d moisture resistance and light resistance test according to the method of Appendix D, and then carry out 72 hot and cold cycle tests according to the method of Appendix D. most
Then determine the dew point of the sample according to the method of 7.14.
7.16 Emergency window glass escape test
Carry out according to the method specified in GB/T 32056.
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