GB/T 28267.4-2015 English PDF (GB/T28267.4-2015)

GB/T 28267.4-2015: Steel cord conveyor belts -- Part 4: Vulcanized belt joints
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GB/T 28267.4-2015
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 53.040.20
G 42
GB/T 28267.4-2015 / ISO 15236-4.2004
Steel cord conveyor belts - Part 4.
Vulcanized belt joints
(ISO 15236-4.2004, 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 ... 4 
2 Terms and definitions ... 4 
3 Symbols and units ... 4 
4 Types of joints ... 4 
5 Joint material ... 9 
6 Making the joint ... 9 
7 Marking the joint ... 10 
Foreword
GB/T 28267 consists of the following 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 4th 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 15236-4.2004
Steel cord conveyor belts - Part 4. Vulcanized belt joints.
This Part makes the following editorial modification.
- modified “≥ 6.0” in Table 2 to “≤ 6.0”.
This Part was proposed by China Petroleum and Chemical Industry Federation.
This Part shall be under the jurisdiction of National Technical Committee on
Pulley and Belt of Standardization Administration of China (SAC/TC 428).
The drafting organizations of this Part. Zhejiang Double Arrow Rubber Co., Ltd.,
Shanxi Phoenix Tape Co., Ltd., Zhejiang Three-dimensional Rubber Products
Co., Ltd., Shandong Dawn Tape Limited, Shenyang Taifeng Tape
Manufacturing Co., Ltd., Yankuang Group Tangcun Industry Co., Ltd..
Main drafters of this Part. Zhuang Bingjian, Qu Wende, Zhang Guofang, Liu
Shengping, Wang Bo, Sun Guimei.
Steel cord conveyor belts - Part 4.
Vulcanized belt joints
1 Scope
This Part of GB/T 28267 specifies design, dimensions, requirements and
marking of vulcanized joints for steel cord conveyor belts.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
vulcanized joint
area within which the cords from two belt lengths are joined and vulcanized
through the surrounding rubber
3 Symbols and units
For the purposes of this Part, the symbols and units given in Table 1 apply.
Table 1 Symbols and units
4 Types of joints
4.1 General
Figure 3 Part of a finger joint
NOTE 2 A loss of static strength in the splice is unavoidable, the extent of the loss
being dependent on the construction of the splice.
5 Joint material
The joint material shall be chosen for the belt types to be joined, ensuring that
the material will not be spoiled by ageing.
6 Making the joint
The heating platens shall be at least 150 mm larger than the joint on both sides
in the longitudinal direction and shall at least cover the side irons in the
transverse direction.
The heating platens shall be loaded evenly with a pressure of at least 1 MPa.
Mechanical pressure equipment shall use a device to even out the applied
pressure.
Unless otherwise agreed between the manufacturer and purchaser, when
making the joint there shall be an equal thickness of the rubber between the
cords.
When making joints the following general guidance shall be observed.
- ensure a large adhesion area by beveling the cover transition zones;
- leave a coat of adhesion rubber on the cord;
- carefully fill the space between the cords with a sufficient quality of
adhesion rubber;
- use a material with a high adhesion.
In addition for interlaced stepped joints.
GB/T 28267.4-2015
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 53.040.20
G 42
GB/T 28267.4-2015 / ISO 15236-4.2004
Steel cord conveyor belts - Part 4.
Vulcanized belt joints
(ISO 15236-4.2004, 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 ... 4 
2 Terms and definitions ... 4 
3 Symbols and units ... 4 
4 Types of joints ... 4 
5 Joint material ... 9 
6 Making the joint ... 9 
7 Marking the joint ... 10 
Foreword
GB/T 28267 consists of the following 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 4th 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 15236-4.2004
Steel cord conveyor belts - Part 4. Vulcanized belt joints.
This Part makes the following editorial modification.
- modified “≥ 6.0” in Table 2 to “≤ 6.0”.
This Part was proposed by China Petroleum and Chemical Industry Federation.
This Part shall be under the jurisdiction of National Technical Committee on
Pulley and Belt of Standardization Administration of China (SAC/TC 428).
The drafting organizations of this Part. Zhejiang Double Arrow Rubber Co., Ltd.,
Shanxi Phoenix Tape Co., Ltd., Zhejiang Three-dimensional Rubber Products
Co., Ltd., Shandong Dawn Tape Limited, Shenyang Taifeng Tape
Manufacturing Co., Ltd., Yankuang Group Tangcun Industry Co., Ltd..
Main drafters of this Part. Zhuang Bingjian, Qu Wende, Zhang Guofang, Liu
Shengping, Wang Bo, Sun Guimei.
Steel cord conveyor belts - Part 4.
Vulcanized belt joints
1 Scope
This Part of GB/T 28267 specifies design, dimensions, requirements and
marking of vulcanized joints for steel cord conveyor belts.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
vulcanized joint
area within which the cords from two belt lengths are joined and vulcanized
through the surrounding rubber
3 Symbols and units
For the purposes of this Part, the symbols and units given in Table 1 apply.
Table 1 Symbols and units
4 Types of joints
4.1 General
Figure 3 Part of a finger joint
NOTE 2 A loss of static strength in the splice is unavoidable, the extent of the loss
being dependent on the construction of the splice.
5 Joint material
The joint material shall be chosen for the belt types to be joined, ensuring that
the material will not be spoiled by ageing.
6 Making the joint
The heating platens shall be at least 150 mm larger than the joint on both sides
in the longitudinal direction and shall at least cover the side irons in the
transverse direction.
The heating platens shall be loaded evenly with a pressure of at least 1 MPa.
Mechanical pressure equipment shall use a device to even out the applied
pressure.
Unless otherwise agreed between the manufacturer and purchaser, when
making the joint there shall be an equal thickness of the rubber between the
cords.
When making joints the following general guidance shall be observed.
- ensure a large adhesion area by beveling the cover transition zones;
- leave a coat of adhesion rubber on the cord;
- carefully fill the space between the cords with a sufficient quality of
adhesion rubber;
- use a material with a high adhesion.
In addition for interlaced stepped joints.