Belt drives - Electrical conductivity of antistatic belts: Characteristics and test methods
试验
1Key Takeaways
This document specifies the maximum electrical resistance of the following:
— antistatic endless V-ribbed belts;
— joined V-belts;
— single V-belts, including wide section belts and hexagonal belts.
This document also specifies the corresponding production control and individual proof methods of measurement…
2Expert Interpretation
ISO 1813:2025, fifth edition, specifies in detail the electrical conductivity characteristics and test methods for antistatic V-belts, multi-ribbed belts, and banded belts. It is applicable to industrial applications in explosive atmospheres or with fire risks, ensuring that the belts have sufficient conductivity to dissipate static charge generated during operation.
In-depth interpretation of ISO 1813:2025 standard for the conductivity of antistatic belts
International standard ISO 1813:2025, fifth edition, "Belt drives—Conductivity of antistatic belts: Characteristics and test methods," is an important technical specification in the field of belt drives, providing a unified technical basis for the design, production, and inspection of antistatic belts. This standard was published in October 2025, replacing the fourth edition in 2014, and has undergone significant revisions in its technical content.
Scope and technical background of the standard
This standard applies to the maximum resistance specifications for antistatic annular multi-ribbed belts, banded V-belts, and single V-belts (including wide-section belts and hexagonal belts). It is mainly used in explosive atmospheres or conditions with fire risk to ensure that the belt has sufficient conductivity to dissipate static charge generated during operation.
From a technological evolution perspective, the fifth edition of the standard added terminology clauses based on the fourth edition and revised the unit of resistivity of the dry film surface from Ω·m to Ω. This change reflects the advancement of testing technology and the requirement for more precise evaluation of conductivity performance. Electrical Conductivity Technical Requirements According to Chapter 4 of the standard, the electrical conductivity of antistatic belts must meet strict resistance limit requirements. When tested according to the production control test methods in Chapter 8, the resistance of a single belt should not exceed the applicable limit specified in Table 1, Table 2 or Table 3; when tested according to the verification test methods in Chapter 9, the resistance should not exceed the value calculated by formula (1).>
Test Method Type
Applicable Conditions
Resistance Judgment Basis
Test Environment Requirements
Production Control Testing
Factory Routine Inspection
Directly Refer to Table Limits
Ambient Temperature 15-30℃
Verification Test
Laboratory Precision Test
Calculation Formula R≤6×10⁵×L/l
Standard Atmosphere 23/50
Test Equipment and Material Specifications
Technical Requirements for Insulation Testers
Standard 6.1 clearly requires the use of an insulation tester with a rated open-circuit voltage of 500V DC, applying a voltage of not less than 40V to the test belt section, with a power not exceeding 3W, and a measurement accuracy of ±5%. For resistance values higher than 10⁶Ω, instruments with a rated open-circuit voltage of 1000V are permitted.
Metal Electrode Design Specifications
Electrode design has specific requirements depending on the type of belt: For single V-belt testing, a V-groove is used to fix the electrode, and the groove size matches the groove shape of the matching pulley; for multi-ribbed belt testing, the test position needs to be adjusted according to the number of ribs; for banded belt testing, either overall testing or single-belt testing can be used.
Belt Type
Electrode Configuration
Contact Force Requirements
Special Considerations
Single V-belt
V-groove Fixed or Movable Electrode
1N/mm Nominal Width
Maintain Continuity with Previous Versions
Multi-Wedge Belt
Dedicated for Ridge or Back Electrode
Calculated based on pitch × number of ribs
Belt movement required when number of ribs > 4
Linked belt
Overall test or single test electrode
Force applied to each belt individually
Test movement required when number of belts > 2
Detailed Explanation of Test Methods and Procedures
Production Control Test Methods
Chapter 8 specifies the factory test method, requiring the test environment temperature to be controlled between 15-30℃. The product must be cooled to this temperature range before testing. The test procedure includes: straightening the belt between the electrodes, applying the specified contact force, avoiding breathing on the test surface (moisture condensation will interfere with the results), and measuring the resistance value 5±1 seconds after applying the voltage.
The number of tests is determined based on the belt length: For belts ≤2000mm in length, test two points along the length of a single V-belt; for hexagonal belts, test two points on each of the two drive surfaces; for linked belts, test two points as a whole, or test two points on each of multiple belts; for multi-rib belts with a standard width ≤20 ribs, test two points. For longer belts, add one test point for every additional 1000mm of length. Verification Test Methods The laboratory verification test requirements specified in Chapter 9 must be conducted in a standard atmospheric 23/50 environment, i.e., temperature (23±2)℃, relative humidity (50±5)%. Key steps include conductive coating treatment, belt pretreatment, electrode cleaning, and precise measurement. The conductive coating can be conductive silver paint or colloidal graphite (dry film surface resistance <10Ω) or a specific conductive liquid formulation. The belt must be kept in a strain-free state in standard atmosphere for at least 2 hours, and the test surface must be cleaned with dry Fuller's earth before immediately applying the conductive coating material.
Resistance Judgment Standards and Technical Parameters
The standard specifies the resistance limits for different types of belts through four detailed tables:
Table Number
Scope of Application
Key Parameters
Test Conditions
Table 1
Single V-belt including hexagonal belts
Classification Limits for Industrial V-belts, Automotive V-belts, and Agricultural Belts
Electrode Spacing L=100mm
Table 2
Multi-ribbed Belt Drive Surface
Limits for Different Rib Numbers of PH, PJ, PK, PL, and PM Types
Electrode configuration is shown in Figure 4. Table 3. Banded V-belts. Narrow and classic types with different belt count limits. Overall test resistance requirements. Table 4. Multi-ribbed belt back side. Different profile multi-ribbed belt back side resistance limits. Calculated based on pitch. The resistance determination for the verification test is calculated using the formula: R ≤ 6 × 10⁵ × L/l, where L is the dry distance between electrodes, and l is the total length of the belt in contact with the electrodes. Specific calculation examples are as follows: For narrow V-belts, it is the sum of the lengths of the two equal sides of the belt cross-section; for multi-ribbed belts, it is the sum of the measured side contact lengths of each rib multiplied by the number of ribs; for multi-ribbed belt back side, it is the pitch P multiplied by the number of ribs; for banded belts, it is the smaller of the electrode width or the belt width.
Standard Implementation Recommendations and Quality Control
Key Implementation Points for Manufacturing Enterprises
Manufacturing enterprises should establish a sound quality control system to ensure that each batch of products meets the standard requirements. It is recommended to develop internal inspection procedures, clearly defining the sampling plan and acceptance criteria for production control tests. For belts in critical application areas, 100% inspection should be considered.
User Acceptance and Maintenance
When accepting belts, users should select appropriate testing methods based on the risk level of the usage environment. For belts used in explosive atmospheres, it is recommended to use verification testing methods for more accurate evaluation. During use, the conductivity of the belt should be checked regularly to ensure it always meets anti-static requirements.
Testing Laboratory Capacity Building
Testing laboratories should be equipped with testing equipment that meets the standard requirements and establish a strict environmental control system to ensure the stability and repeatability of testing conditions. Testing personnel must undergo professional training, be familiar with the standard requirements and testing procedures, and avoid operational errors affecting test results.
Technological Development Trends and Standards Outlook
With the improvement of industrial automation and the continuous increase in safety production requirements, the application scope of antistatic belts will further expand. Future standards may develop towards more precise testing methods, stricter limit requirements, and a wider range of applications. The emergence of new materials and processes will also drive the continuous updating and improvement of standards.
The implementation of ISO 1813:2025 will effectively improve the quality level of antistatic belt products and provide reliable technical support for industrial safety production. All relevant parties should fully understand the standard requirements and ensure that compliance with the standard provisions is achieved in all aspects of product design, production, inspection, and use.
ISO 1604ISO 23529ISO 2790ISO 3410ISO 4183ISO 4184ISO 5289ISO 5290
6Frequently Asked Questions
What is ISO 1813:2025?
ISO 1813:2025 — Belt drives - Electrical conductivity of antistatic belts: Characteristics and test methods is an international standard developed by International Organization for Standardization (ISO). This document specifies the maximum electrical resistance of the following: — antistatic endless V-ribbed belts; — joined V-belts; — single V-belts, including wide section belts and hexagonal belts. This document also specifies the corresponding...
What does ISO 1813:2025 cover?
This standard covers: This document specifies the maximum electrical resistance of the following: — antistatic endless V-ribbed belts; — joined V-belts; — single V-belts, including wide section belts and hexagonal belts. This document also specifies the corresponding production control and individual proof methods of...
Who should use this standard?
This standard is intended for organizations, professionals, and stakeholders involved in various industries and sectors. It is applicable to manufacturers, service providers, regulatory bodies, and certification organizations.
What is the latest version of ISO 1813:2025?
The current published version is ISO 1813:2025, published on 2025-10-01. Always check for amendments or pending revisions.
How do I purchase ISO 1813:2025?
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