GB/T 28267.3-2015 English PDF (GBT28267.3-2015)

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GB/T 28267.3-2015: Steel cord conveyor belts -- Part 3: Special safety requirements for belts for use in underground installations
GB/T 28267.3-2015
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 53.040.20
G 42
GB/T 28267.3-2015 / ISO 15236-3.2007
Steel cord conveyor belts - Part 3. Special safety
requirements for belts for use in underground
installations
(ISO 15236-3.2007, IDT)
ISSUED ON. DECEMBER 31, 2015
IMPLEMENTED ON. JULY 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 6 
4 Symbols and units ... 7 
5 Belt design ... 7 
6 Design and construction ... 9 
7 Mechanical requirements ... 11 
8 Sampling ... 15 
9 Designation ... 16 
10 Ordering data ... 16 
11 Marking ... 17 
Annex A (Informative) Helpful information to be supplied by the purchaser ... 18 
Bibliography ... 20 
Foreword
GB/T 28267 consists of the following 4 parts.
- Part 1. Design, dimensions and mechanical requirements for conveyor
belts for general use;
- Part 2. Preferred belt types;
- Part 3. Special safety requirements for belts for use in underground
installations;
- Part 4. Vulcanized belt joints.
This Part is the third part of GB/T 28267.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part uses translation method and identically adopts ISO 15236-3.2007
Steel cord conveyor belts - Part 3. Special safety requirements for belts for use
in underground installations (English version).
The Chinese documents which have consistency with the international
normative references in this Part are as follows.
GB/T 528 Rubber, vulcanized or thermoplastic--Determination of tensile
stress-strain properties (GB/T 528-2009, ISO 37.2005, IDT)
GB/T 3916 Textiles - Yarns from packages - Determination of single-end
breaking force and elongation at break using constant rate of extension (CRE)
tester (GB/T 3916-2013, ISO 2062.2009, MOD)
GB/T 5754.2 Steel cord conveyor belts - Longitudinal traction test - Part 2.
Measurement of tensile strength (GB/T 5754.2-2005, ISO 7622-2.1984, IDT)
GB/T 5755 Steel cord conveyor belts - Cord-to-coating bond test - Initial
test and after thermal treatment (GB/T 5755-2013, ISO 7623.1996, IDT)
GB/T 7983 Conveyor Belts - Transverse Flexibility (Troughability) - Test
Method (GB/T 7983-2013, ISO 703.2007, MOD)
GB/T 17044 Steel cord conveyor belts - Adhesion strength test of the cover
to the core layer (GB/T 17044-2013, ISO 8094.1984, IDT)
This Part makes the following editorial modifications.
- respectively corrected “hm ≤ 1 mm, 1.0 mm < hm ≤ 1.5 mm, hm > 1.5 mm”
to “Δh ≤ 1 mm, 1.0 mm < Δh ≤ 1.5 mm, Δh > 1.5 mm”;
- used the latest version of ISO 7590.2009 to replace ISO 7590.2001.
This Part was proposed by China Petroleum and Chemical Industry Federation.
This Part shall be under the jurisdiction of Sub-committee on Conveyer Belt of
National Technical Committee on Pulley and Belt of Standardization
Administration of China (SAC/TC 428/SC 1).
The drafting organizations of this Part. Zhejiang Double Arrow Rubber Co., Ltd.,
Anhui Zhongyi Tape Co., Ltd., Zhejiang Fenfei Rubber and Plastic Products Co.,
Ltd., Zhejiang Three-dimensional Rubber Products Co., Ltd., Yankuang Group
Tangcun Industry Co., Ltd..
Main drafters of this Part. Zhu Hanhua, Song Changjiang, Zheng Zhiliu, Zhang
Guofang, Huang Xiaoting.
Steel cord conveyor belts - Part 3. Special safety
requirements for belts for use in underground
installations
1 Scope
This Part of GB/T 28267 specifies the performance and constructional
requirements applicable to conveyor belts for underground mining having steel
cords in the longitudinal direction as reinforcement. The requirements for
design and construction apply to the design of single belts as well as the design
of complete type series such as those covered in GB/T 28267.2.
Steel cord belts in accordance with this Part are intended for use underground
in coal mines and in other applications where the highest demands for safety
against fire and explosion hazards have to be complied with.
NOTE At present the requirements can only be met by the use of compounds based on
chloroprene rubber for the covers as well as for the bonding rubber.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 5753-2013, Steel Cord Conveyor Belts - Methods for the Determination
of Total Thickness and Cover Thickness (ISO 7590.2009, IDT);
GB/T 9867-2008, Rubber vulcanized or thermoplastic - Determination of
abrasion resistance using a rotating cylindrical drum device (ISO 4649.2002,
IDT)
ISO 37, Rubber, vulcanized or thermoplastic - Determination of tensile
stress-strain properties
ISO 703, Conveyor belts - Transverse flexibility (troughability) - Test method
ISO 2062, Textiles - Yarns from packages - Determination of single-end
breaking force and elongation at break