GB/T 1703-2017 PDF English
US$85.00 · In stock · Download in 9 secondsGB/T 1703-2017: Cycle inner tubes Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 1703: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 1703-2017 | English | 85 |
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Cycle inner tubes
| Valid |
| GB/T 1703-2008 | English | 319 |
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Cycle inner tubes
| Obsolete |
| GB/T 1703-1997 | English | 279 |
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Cycle inner tubes
| Obsolete |
| GB/T 1703-1992 | English | RFQ |
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Liner tubes for cycles
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 1703-2017
GB/T 1703-2017: Cycle inner tubes---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/GBT1703-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.160.10
G 41
Replacing GB/T 1703-2008
Cycle inner tubes
Issued on. SEPTEMBER 7, 2017
Implemented on. AUGUST 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the PRC;
Standardization Administration of the PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Categories of inner tube... 4
4 Requirements... 4
5 Test methods... 6
6 Marking... 8
Foreword
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 1703-2008 “Cycle inner tubes”. As compared with
GB/T 1703-2008, the main technical changes are as follows.
- DELETE references to GB/T 1702 and HG/T 2942 (SEE Chapter 2 of the
2008 version), ADD references to GB 1796.1 and GB 1796.2 (see Chapter
2);
- For “Table 1 -- Other main properties of inner tubes”, ADD the item of
elongation at break of inner tubes; For the adhesive strength test of rubber
base valve and tube body, ADD Footnote a; MODIFY the specification
classification description in the index column of machine test mileage (SEE
4.4.2, the 4.4.2 of the 2008 version);
- ADD the measuring position and measuring method for inner tube inflating
volume when detecting inner tube airtightness, and MODIFY the inflating
volume of Category B inner tube (SEE 5.1.1, the 5.1.1 of the 2008 version);
- ADD the tensile test method for elongation at break of inner tubes (SEE
5.2).
This Standard was proposed by China Petroleum and Chemical Industry
Federation.
This Standard shall be under the jurisdiction of China National Technical
Committee for Tyres and Rims Standardization (SAC/TC 19).
Drafting organizations of this Standard. Jiantai Rubber (Shenzhen) Co., Ltd.,
Sichuan Yuanxing Rubber Co., Ltd., Guangzhou Rubber Industry Products
Research Institute Co., Ltd., Xiamen Cheng Shin Enterprise Co., Ltd.,
Guangzhou Feixuan Rubber Co., Ltd., Tianjin Wanda Tyre Group Co., Ltd., New
Dongyue Group Co., Ltd.
Main drafters of this Standard. Chen Qingsong, Wang Qingyi, Qiu Linghong,
Zhang Guangfu, Zhu Hongsuo, Li Ruihua, Huang Yaopeng, Yu Zhenjiang, Xuan
Zhaomin.
The previous releases of versions of the standard replaced by this Standard
are.
- GB 1703-1979, GB 1703-1986, GB/T 1703-1992, GB/T 1703-1997, GB/T
1703-2008.
Cycle inner tubes
1 Scope
This Standard specifies the categories, requirements, test methods, and
marking of inner tubes.
This Standard is applicable to the model vulcanized inner tube which
assembles cycle tyre.
This Standard is not applicable to non-model vulcanized inner tube and the
inner tube for tubular racing-car tyre.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the versions with the dates indicated are
applicable to this document. For the undated references, the latest version
(including all the amendments) are applicable to this document.
GB/T 528 Rubber, vulcanized or thermoplastic - Determination of tensile
stress-strain properties
GB/T 1796.1 Tyre valves - Part 1.Tube clamp-in valves
GB/T 1796.2 Tyre valves - Part 2.Rubber base valves
3 Categories of inner tube
According to the different materials used to make inner tubes, inner tubes are
divided into two categories.
4 Requirements
4.1 Specification and dimension
The specification and dimension of inner tubes shall conform to the accessory
requirements of the corresponding cover tyre as specified in GB/T 7377.
4.3 Appearance quality
The appearance of inner tubes shall be uniform in thickness and shape. There
shall no flaws, cracks, bubbles, sponginess, impurities, and other defects which
affect usability.
4.4 Properties
4.4.1 Airtightness
Inner tubes shall have good airtightness; and shall pass the test of 5.1.
5 Test methods
5.1 Airtightness
5.1.1 INFLATE the inner tube; after the perimeter of inner tube section opposite
to the valve is approximately 120% of the double flat section width of the inner
tube of Category A, and 130% of that of Category B, PLACE it at room
temperature for 12 h.
5.2 Tensile test
According to the provisions of GB/T 528, CARRY out the test. Test pieces. USE
a Type 2 cutter, when measuring the elongation, in the non-joint part of inner
tube, along the peripheral direction of the tube body, to take one test piece each
(as shown in Figure 1.at 1, 2, 3, 4, AVOID the font and mould line position).
5.3 Joint tensile strength
According to the provisions of GB/T 528, CARRY out the test. Test pieces. At
the joint of inner tube, USE a Type 2 cutter, along the peripheral direction of
tube body section, to uniformly sample not less than 3 test pieces.
5.4 Adhesive strength of rubber base valve and tube body
On the two sides of inner tube valve, in the peripheral direction of tube body, at
10 mm away from the valve rubble base at one end, and at 100 mm away from
the rubber base at the other end, CUT off test pieces.
5.5 Durability test
After loading the inner tube into the corresponding cover tyre, according to the
provisions of GB/T 9749, CONDUCT the test. After the test, according to the
test method of 5.1, CARRY out airtightness test.
6 Marking
Each inner tube shall have the following markings.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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