GB 18045-2000 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 18045-2000 | English | 125 |
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Safety glass for railway rolling stock
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GB 18045-2000: Safety glass for railway rolling stock---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/GB18045-2000
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 81.040
Q 37
Safety Glass for Railway Rolling Stock
Issued on. APRIL 3, 2000
Implemented on. JUNE 1, 2000
Issued by. China State Bureau of Quality & Technical Supervision
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Definitions... 4
4 Type and Mark... 5
5 Requirements... 5
6 Test Methods... 15
7 Inspection Rules... 22
8 Packaging, Marking, Transportation and Storage... 24
Foreword
This Standard equivalently adopts Japanese standard JIS R 3213.1998 “Safety Glass for
Railway Rolling Stock”, which is equivalent to this Standard in terms of technical contents.
As JIS R3213.1998 imposes somewhat lower requirements on the performance of 3.2mm
tempered glass, and the 3.2mm tempered glass has not yet been used for railway rolling
stock in China, this Standard deletes the series of this thickness; in considering the service
environment and process characteristics of tempered glass and laminated glass, this
Standard adds the performance requirements of transmittance and optical distortion of
tempered glass as well as the requirements of radiation resistance and penetration
resistance of laminated glass; as the thermal performance index of insulated glass
depends on its structural composition rather than its safety performance, this Standard has
no such provisions. This Standard makes references to the relevant national standards for
some of its performance test methods, which are equivalent to international standards and
consistent with the provisions of the Japanese standard JIS R 3213-1998.
This Standard was proposed by the State Bureau of Building Materials Industry.
This Standard shall be under the jurisdiction of the Glass Science and Special Glass Fiber
Institute of China Building Materials Academy.
Drafting organizations of this Standard. Railway Ministry Sifang Rolling Stock Research
Institute AND Qinghuangdao Yaohua Industrial and Technical Glass Co., Ltd.
The main drafters of this Standard. Wang Wenbiao, Gong Shuyi, Dai Kegong, Wang
Yingzhou, Mo Jiao, Yang Jianjun, Sun Baishi and Ma Jun.
This Standard shall be responsibly interpreted by the Glass Science and Special Glass
Fiber Institute of China Building Materials Academy.
Safety Glass for Railway Rolling Stock
1 Scope
This Standard specifies the type and requirements of safety glass for railway rolling stock.
This Standard is applicable to safety glass for windows of railway rolling stock and
locomotives.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute
the provisions of this Standard. At the time of publication, the editions indicated were valid.
All standards are subject to revision. The parties who enter into agreement based on this
Standard are encouraged to investigate the possibility of applying the latest editions of the
standards indicated below.
GB/T 531-1992 Rubber, Vulcanized - Determination of Shore A Hardness (neq ISO
7691.1986)
GB 1216-1985 Micrometers (neq ISO 3611.1978)
GB/T 5137.1-1996 Road Vehicles - Safety Glazing Materials - Test Methods for
Mechanical Properties (eqv ISO 3537.1991)
GB/T 5137.2-1996 Road Vehicles - Safety Glasses - Test Methods for Optical Properties
3 Definitions
This Standard adopts the definitions given in JC/T 632 and the following.
3.1 Tempered Laminated Glass
When the laminated glass product that is composed of more than two glass plates has at
least one tempered glass, it is called tempered laminated glass.
3.2 Insulated Safety Glass
The product, that is made of two or more sheets of laminated or tempered glass,
juxtaposed with uniform clearance which is filled inside with dry air close to air pressure
outside or other gases, and sealed along its perimeter.
3.4 Datum Edge
The lower edge of the glass fitted to a vehicle.
4 Type and Mark
4.1 The type and mark of safety glass for railway rolling stock are shown in Table 1.
4.2 Example of Marking
5 Requirements
Safety glass shall, based on their different types, comply with the applicable provisions as
shown in Table 2.
5.1 Requirements of Tempered Glass
5.1.1 Thickness
The thickness of tempered glass and its allowable tolerance shall comply with Table 3.
5.1.2 Dimensional Tolerance
5.1.2.1 The allowable dimensional tolerance of rectangular or square tempered flat glass
is shown in Table 4; however, it shall be negotiated by both the buyer and the seller in case
that it complies with any of the provisions 1) ~4).
5.1.2.2 The allowable dimensional tolerance of tempered flat and bent glass of other
shapes but rectangles and squares is shown in Table 5; however, it shall be negotiated by
both the buyer and the seller in case that it complies with any of the provisions 1) ~3).
5.1.5 Appearance
The appearance quality of tempered glass is shown in Table 7.
5.1.6 Transmittance
Three test pieces shall be taken for test. The transmittance of every test piece must be
more than 50%. The transmittance of colored glass shall be negotiated between the buyer
and the seller.
in a 100mm×100mm square with this part included must be more than 160.
5.2 Requirements of Laminated Glass
5.2.1 Thickness
The nominal thickness of laminated glass is the sum of the nominal thickness of both pane
glass and the interlayer, and shall be agreed on by the buyer and the seller.
The thickness of laminated glass and its allowable tolerance are shown in Table 9.However,
for the bent laminated glass, the laminated glass made up of more than 3 panes, the
tempered laminated glass and the laminated glass with a nominal thickness more than
13mm, the thickness and their allowable tolerance shall be agreed upon by the buyer and
the seller.
5.2.2.2 The allowable dimensional tolerance of flat and bend laminated glass of the shape
other than rectangles and squares is shown in Table 11.However, the allowable
dimensional tolerance of the laminated glass made up of more than 3 panes, the laminated
glass with a nominal thickness more than 13mm and the laminated glass with the length
of its one side over 2400mm shall be agreed upon by the buyer and the seller.
5.2.11 Penetration Resistance
Six test pieces are taken for the test. The falling ball shall be 4m high and shall not
penetrate the test pieces within 5s after the impact. If the 6 test pieces comply, then it is
qualified; if 4 or less comply, then it is not qualified.
If 5 test pieces comply, another 6 fresh test pieces shall be taken for the test. If all of the 6
fresh test pieces comply, then it is qualified.
5.3 Requirements of Insulated Safety Glass
5.3.1 Thickness
The thickness of insulated safety glass is the sum of the nominal thickness of both pane
glass and the air layer, and shall be agreed on by the buyer and the seller.
The allowable thickness tolerance of insulated safety glass is shown in Table 14.However,
for the products with more than 2 air layers or the products whose pane glass is 15mm in
one sheet, the bent insulated glass and the products made up of more than 2 layers of
laminated glass, then their allowable thickness tolerance shall be agreed upon by the buyer
and the seller.
5.3.2.2 The allowable dimensional tolerance of insulated safety glass of the shape other
than rectangles and squares is shown in Table 16.However, the allowable dimensional
tolerance of the products with its length over 2200mm or with more than 2 air layers shall
be agreed upon by the buyer and the seller.
6 Test Methods
6.1 Test Methods of the Thickness and Dimensions of Safety Glass
6.1.1 Determination of Thickness
A micrometer in conformity with GB 1216 or any other instrument of the equivalent
accuracy is adopted to measure the midpoint of every side of the glass. The arithmetic
mean value of the measuring results is the thickness value, rounded to 2 decimal places
in mm.
6.1.4 Determination of Curvature Tolerance
Take bent products as test pieces for determination of curvature tolerance. Put the test
piece on the test mold as shown in Figure 1.Use a clearance gauge accurate to 0.1mm to
measure the clearance between the glass test piece and the test mold.
6.2 Test Methods of Appearance of Safety Glass
Take the products as test pieces. Under the conditions of good natural light or scattering
illumination, conduct a visual test at 500mm away from the glass surface. In determining
the length or diameter of apparent defects, a metal ruler, accurate to 0.5mm as required
by JB 2546, shall be used.
6.3 Test Methods of Basic Characteristics
6.3.1 Transmittance Test
Take the product or the test piece as the sample, and carry out determination according to
GB/T 5137.2.
6.3.2 Optical Distortion Test
Take the product as the test piece, and carry out determination according to GB/T 5137.2.
6.3.4.3 Test Procedure
6.3.5 Fragmentation Test
6.3.5.1 Test Piece
Sampled from the products.
6.3.5.2 Test Rig
Exposure and printing equipment; hammer or punch with a tip curvature radius at
0.2mm±0.05mm.
6.3.5.3 Test Procedure
6.3.6.1 Test Piece
The size of test pieces is 350mm×500mm.
6.3.6.3.2 Test Rig
Use the container of steel sheet as shown in Figure 3 and bar thermometers (1°C in a
gradation, and with a range from +30°C to -70°C) or temperature indicators of the same
accuracy as above.
6.3.6.3 Test Procedure
6.3.8 Radiation Resistance Test
The laminated glass, whose test piece size is 76mm×300mm, follows GB/T 5137.3 to carry
out the test.
6.3.9 Penetration Resistance Test
The laminated glass, whose test piece size is 300mm×300mm, follows GB/T 5137.3 to
carry out the test.
7 Inspection Rules
7.1 Classification of Inspection
The inspection includes exit-factory inspection and type inspection.
7.1.1 Exit-factory inspection. the inspection item includes thickness, dimensional tolerance,
appearance, warpage, curvature tolerance and dew point. Any request for additional
inspection items shall be agreed upon by the buyer and seller.
7.2 Lot Grouping and Sampling Rules
7.2.1 The test of products on their thickness, dimensional tolerance, appearance, warpage,
curvature tolerance and dew points shall make random sampling according to Table 22.If
the lot range of dew point test is less than 15 pieces, at least 5 pieces shall be sampled for
the test.
7.2.2 For other technical performance required for the product, if tested by the product, it
shall be sampled in number as required by the test item. If the test uses test pieces, the
test pieces shall be prepared under the same process conditions.
7.3 Determination Rules
If the rejection number of thickness, dimensional tolerance, appearance, warpage and
curvature tolerance is greater than or equal to that as specified in Table 22, then the lot of
the products is deemed as unqualified in respect of the thickness, dimensional tolerance,
appearance, warpage and curvature tolerance respectively.
8 Packaging, Marking, Transportation and Storage
8.1 Packaging
The product shall be packed in containers or wooden crates. Every sheet of glass shall be
packaged with paper or furnished with other protective measures. Between the glass and
the packing case, it shall be filled with light and soft materials, such as scratches, that will
not cause apparent defects to glass. The detail requirements shall comply with JC/T 512.
8.2 Marking
The marking shall comply with the relevant provisions set forth in the JC/T 512.Every
packing case shall be marked outside with the words “upward, handle with care” as well
as the glass thickness, type, manufacturer name or trademark.
8.3 Transportation
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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