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GB/T 25431.3-2025: Extruders and extrusion lines of rubber and plastics - Part 3: Safety requirements for haul-offs
Status: Valid GB/T 25431.3: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 25431.3-2025 | English | 519 |
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Extruders and extrusion lines of rubber and plastics - Part 3: Safety requirements for haul-offs
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GB/T 25431.3-2025
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| GB 25431.3-2010 | English | 414 |
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Extruders and extrusion lines for rubber and plastics -- Part 3: Safety requirements for haul-offs
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GB 25431.3-2010
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Basic data | Standard ID | GB/T 25431.3-2025 (GB/T25431.3-2025) | | Description (Translated English) | Extruders and extrusion lines of rubber and plastics - Part 3: Safety requirements for haul-offs | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G95 | | Classification of International Standard | 71.120; 83.200 | | Word Count Estimation | 26,268 | | Date of Issue | 2025-08-29 | | Date of Implementation | 2026-08-01 | | Older Standard (superseded by this standard) | GB 25431.3-2010 | | Issuing agency(ies) | State Administration for Market Regulation; Standardization Administration of China | GB/T 25431.3-2025: Extruders and extrusion lines of rubber and plastics - Part 3: Safety requirements for haul-offs
---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/GBT25431.3-2025
ICS 71.120;83.200
CCSG95
National Standards of the People's Republic of China
Replaces GB 25431.3-2010
Rubber and plastic extruders and extrusion production lines
Part 3.Safety Requirements for Traction Devices
Published on 2025-08-29
Implemented on August 1, 2026
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of Contents
Preface III
Introduction V
1.Scope 1
2 Normative References 1
3.Terms and Definitions 2
4.Safety requirements and/or protection/risk reduction measures 3.
4.1 General Requirements 3
4.2 Mechanical Hazards 3
4.3 Electrical Hazards and Electromagnetic Interference Hazards 5
4.4 Hazards caused by malfunctions of safety-related components in the control system 5
4.5 Hazards of Hydraulic and Pneumatic Systems 6
4.6 Thermal Hazards 6
4.7 Noise Hazard 6
4.8 Dangers caused by instability 6
5.Verification of safety requirements and/or protection/risk reduction measures 6.
6.Usage Information 8.
6.1 General Requirements 8
6.2 Marking and Signage 8
6.3 Instruction Manual 8
6.4 Noise Emission 8
Appendix A (Informative) Major Hazards 9
Appendix B (Normative) Noise Test Procedure 15
Reference 19
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting.
This document is Part 3 of GB/T 25431 "Rubber and Plastics Extruders and Extrusion Lines". GB/T 25431 has been published as follows.
Part 2.
---Part 1.Safety Requirements for Extruders;
---Part 2.Safety Requirements for Die-face Pelletizers;
---Part 3.Safety requirements for traction devices.
This document replaces GB 25431.3-2010 "Rubber and Plastic Extruders and Extrusion Lines - Part 3.Safety Requirements for Traction Devices".
Compared with GB 25431.3-2010, the main technical changes in the "Requirements" standard, apart from structural adjustments and editorial modifications, are as follows.
---The file range has been changed (see Chapter 1, Chapter 1 of the.2010 edition);
---The term "belt winch traction device" has been changed to "wheel tire traction device," and the definition has been revised (see 3.5,.2010 edition).
3.5) The terms "traction device", "tracked traction device", "belt traction device", "winch traction device" and "traction device" have been changed.
Definition of “roller conveyor traction device” (see 3.1, 3.2, 3.3, 3.4 and 3.6, 3.1, 3.2, 3.3, 3.4 and 3.6 in the.2010 edition);
---Chapter 4, "List of Major Hazards," from the.2010 edition has been deleted. Major hazard areas and major hazards are now listed in Appendix A (see Appendix).
(Record A, Chapter 4 of the.2010 edition)
---The "General Provisions" section has been changed to "General Requirements," and the corresponding technical requirements have been revised (see 4.1, 5.1.1 in the.2010 edition);
---The term "inlet area" has been changed to "feeding area," and the corresponding technical requirements have been modified (see 4.2.1, 5.1.2 in the.2010 version);
---The requirements for the interlocking protective devices with protective locking in the conveyor belt have been changed (see 4.2.2, 5.1.3 in the.2010 version);
---The requirements for interlocking protection devices with protective locking in the drive and power transmission areas have been changed (see 4.2.3, 5.1.4 of the.2010 version);
---Change "Exit Area" to "Discharge Area" and modify the description of the protection clause for "Discharge Area" (see 4.2.4, 5.1.5 in the.2010 version);
---Changed "fall/uncontrollable fall due to gravity" to "fall caused by gravity/uncontrolled descent", and modified the relevant technology.
Requirements (see 4.2.5, 5.1.8 of the.2010 edition);
---Added the additional requirement of full-body accessibility (see 4.2.6);
---Changed "Perform pneumatic and mechanical commissioning operations in hazardous areas" to "Start-up and machine setup operations in hazardous areas," and modified the relevant...
Technical specifications (see 4.2.7, 5.1.6 of the.2010 edition);
---The safety requirement for "moving wheels that change the position of the machine" has been removed; the related technical requirements are already included in the fixed protection of each hazardous area.
The device terms (see 5.1.7 of the.2010 edition);
---Changed "Electrical Hazards" to "Electrical Hazards and Electromagnetic Interference Hazards" and amended the relevant safety technical clauses (see 4.3,.2010).
(5.2 of the.2018 edition)
---The hazards caused by malfunctions of safety-related components in the control system have been modified (see 4.4, 5.4 in the.2010 version);
---The thermal hazard has been changed (see 4.6, 5.5 in the.2010 edition);
---The noise hazard has been changed (see 4.7, 5.6 in the.2010 version);
---The verification of security requirements and/or protection/risk mitigation measures has been changed (see Chapter 5, Chapter 6 of the.2010 edition);
---Appendix B, Noise Test Procedure, has been added (see Appendix B).
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed by the China Petroleum and Chemical Industry Federation.
This document is under the jurisdiction of the National Technical Committee on Standardization of Rubber and Plastics Machinery (SAC/TC71).
This document was drafted by. Guilin Rubber Design Institute Co., Ltd., Guangdong Shicheng Plastic Machinery Co., Ltd., and Wuxi Jiangnan Rubber & Plastic Machinery Co., Ltd.
Limited Liability Company, Ningbo Fangli Technology Co., Ltd., Kingway Machinery (Haining) Co., Ltd., Shandong Tongjia Machinery Co., Ltd., Zhangjiagang Huaming Machinery
Machinery Co., Ltd., Qingdao University of Science and Technology, Nanjing Keya Chemical Complete Equipment Co., Ltd., Qingdao Xinquan Plastic Machinery Co., Ltd., Jiangsu Yuesheng Technology Co., Ltd.
Technology Co., Ltd., Beijing Rubber Industry Research and Design Institute Co., Ltd., Dalian Plastics Machinery Research Institute, National Plastics Machinery Product Quality Supervision
Inspection and Testing Center.
The main drafters of this document are. Chen Yilin, Li Bin, Zhang Chunhua, Zhang Hua, Wang Shangfeng, Lou Yijian, Li Yong, Chen Gang, Wang Chuansheng, Liu Hongtao, and Zhu Changke.
Du Hui, He Cheng, Wang Gengxin, Li Xianglan, Zheng Ji, Qin Zhihong.
The release history of this document and the document it replaces is as follows.
---First published in.2010 as GB 25431.3-2010;
---This is the first revision.
introduction
The safety standard system in the mechanical field consists of the following categories of standards.
---Class A standards (basic safety standards) provide basic concepts, design principles, and general characteristics applicable to all machinery.
---Class B standards (general safety standards) refer to a type of safety device that relates to a specific safety feature of machinery or has a wide range of applications.
● Category B1, safety characteristic standards (such as safety distance, surface temperature, noise);
● Class B2, safety device (such as two-hand operating device, interlocking device, pressure-sensitive device, protective device) standard.
---Class C standards (machinery product safety standards) are standards that specify detailed safety requirements for a particular machine or a group of machines.
According to the classification of GB/T 15706, this document belongs to Class C standards.
This document is particularly relevant to the following stakeholders related to machinery safety.
---Machine manufacturer;
---Health and Safety Agency.
Other stakeholders affected by the level of mechanical safety include.
---Machine users;
---Machine owner;
---Service provider;
---Consumer (when the machine is scheduled to be used by the consumer).
All of the aforementioned stakeholders may participate in the drafting of this document.
The scope of the machinery involved, as well as the hazards, hazardous conditions, and hazardous events covered, is given in the scope of this document.
When the requirements of this document differ from those in Category A or Category B standards, for machines designed and manufactured in accordance with this document...
For this instrument, the requirements in this document take precedence over the requirements in other standards.
Rubber and plastic extruders and extrusion production lines
Part 3.Safety Requirements for Traction Devices
1.Scope
This document specifies the safety requirements for the design and manufacture of traction devices used in the processing of plastics and rubber, including cables, cable cores, profiles, and tubing.
Require.
This document applies to the entire lifecycle of the aforementioned traction device (see section 5.4 of GB/T 15706-2012), during the intended use process.
In addition, all significant hazards and dangers related to the traction device that may arise from misuse that the manufacturer could reasonably foresee.
Hazardous conditions and dangerous events (see Appendix A).
This document includes the following types of traction devices that run from the feeding zone to the discharge zone.
--- Tracked traction device;
---Belt-type traction device;
---Windlock traction device;
---Belt winch traction device;
---Roller conveyor traction device.
This document does not include cutting devices that are integrated with or connected to the traction device.
This document does not include pick-up devices used on film or sheet production lines.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 3766 General rules and safety requirements for hydraulic transmission systems and their components
GB/T 3767-2016 Acoustic pressure method for determining the sound power level and sound energy level of a noise source in an approximately free field above a reflecting surface.
Cheng Fa
GB/T 3768-2017 Acoustic sound pressure method for determining the sound power level and sound energy level of a noise source using the envelope measurement surface above the reflecting surface.
Simplified method
GB/T 4208-2017 Degrees of protection provided by enclosures (IP code)
GB/T 5226.1-2019 Electrical Safety of Machinery - Electrical Equipment of Machinery - Part 1.General Technical Conditions
GB/T 7932 General rules and safety requirements for pneumatic systems and their components
GB/T 8196-2018 General requirements for the design and manufacture of fixed and movable protective devices for mechanical safety.
GB/T 12265-2021 Minimum Spacing for Preventing Crushing of Human Body Parts in Mechanical Safety
GB/T 14574-2000 Marking and verification of noise emission values of acoustic machines and equipment
GB/T 15706-2012 General Principles for Safety Design of Machinery. Risk Assessment and Risk Reduction
GB/T 16404.2 Acoustic intensity method for determining the sound power level of noise sources – Part 2.Scanning measurement
GB/T 16754-2021 Design Principles for Emergency Stop Functions in Mechanical Safety
GB/T 16855.1-2025 Mechanical Safety - Safety Control Systems - Part 1.General Design Principles
GB/T 17248.2-2018 Noise emitted by acoustic machines and equipment with negligible environmental correction above a reflecting surface
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