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GB 18045-2000: Safety glass for railway rolling stock
GB 18045-2000
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 and 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
GB/T 5137.3-1996 Road Vehicles - Safety Glazing Materials - Test Methods for
Resistance to Radiation, High Temperature, Humidity, Fire and Simulated Weathering
(eqv ISO 3917.1992)
JC/T 512-1993 Automotive Safety Glass Packaging
JC/T 632-1996 Automotive Safety Glass Terminology
JB 2546-1989 Steel Ruler
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.
3.3 Interlayer
A synthetic resin layer between pane glasses that make up laminated glass; it is pre-
shaped to be a membrane before manufacturing laminated glass or shaped in the
manufacturing process.
In addition, in the circumstances where adhesives, plasticizers, etc. are adopted, they are
also included in the interlayer.
3.4 Datum Edge
The lower edge of the glass fitted to a vehicle.
3.5 Dew Point
The temperature at which dew or frost appears on the inner surface of insulated glass.
4 Type and Mark
4.1 The type and mark of safety glass for railway rolling stock are shown in Table 1.
Table 1 Type and Mark of Safety Glass
Type Mark Corresponding English Name (for reference)
Tempered glass RT Tempered glass
Laminated glass RL Laminated glass
Insulated safety glass RL Insulated safety glass
4.2 Example of Marking
The laminated glass with nominal dimension of 900mm×700mm and thickness of 5.0mm
is marked as RL 900mm×700mm×5.0.
5 Requirements
Safety glass shall, based on their different types, comply with the applicable provisions as
shown in Table 2.
15 ±0.6
19 ±1.0
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).
1) When the nominal thickness is 4mm, the single sheet is more than 1.8m2 or the length
of the side is greater than 1,800mm;
2) When the nominal thickness is 5mm and 6mm, the single sheet is more than 3.6m2
or the length of the side is greater than 2,400mm;
3) When the nominal thickness is 8mm, 10mm and 12mm, the single sheet is more than
7.2m2 or the length of the side is greater than 3,000mm;
4) When the nominal thickness is 15mm and 19mm.
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).
1) When it is flat in shape and complies with any of the provisions 1), 2), 3) and 4) in
5.1.2.1;
2) When it is bent in shape and the nominal thickness is 4mm, 5mm and 6mm, the
length of the side is greater than 1,600mm or the area is more than 1.2m2;
3) When it is periphery in shape and the nominal thickness is 8mm, the length of the
side is greater than 2,200mm or the area is more than 2.0m2.
5.1.3 Warpage
The Warpage of tempered flat glass shall not exceed 0.3% if it is bow-shaped, and shall
not exceed 0.2% if it is wave-shaped.
Table 4 Allowable Dimensional Tolerance of Rectangular and Square Tempered
Flat Glass
Nominal
thickness d
mm
Area of 1 sheet,
s, m2
Length of side L
mm
Allowable dimensional tolerance
Length and width
mm
Difference of two
diagonal lines
mm
s < 0.3 L< 600 ±1.0 ≤3.5 L≥600 ±1.5 0.3≤s< 0.8 L< 1000 ≤4.5
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.
5.1.7 Optical Distortion
Four test pieces shall be taken for test...