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New Standard | Analysis of GB 24541-2022 “Hand Protection Mechanical Hazard Protective Gloves”

18Sep

New Standard | Analysis of GB 24541-2022 “Hand Protection Mechanical Hazard Protective Gloves”

There are various factors of hand injuries, which can be roughly divided into mechanical injuries, physical injuries, chemical injuries, biological infection injuries, etc. Among them: scratches, broken fingers, broken hands, etc. are mechanical injuries and are relatively common. Wearing gloves during the production process will undoubtedly have a good protective effect on the hands, especially mechanical hazard protection gloves. 

“Mechanical hazards” mainly refer to hazards in the form of pinching, collision, shearing, entanglement, twisting, grinding, cutting, stabbing, etc. caused by direct or indirect contact between moving (stationary) parts, tools, and workpieces of mechanical equipment and the human body. A series of typical cases that occur frequently in modern industrial production endanger the safety of workers.
The mandatory national standard for individual protective equipment GB 24541-2022 “Hand Protection Mechanical Hazard Protective Gloves” (hereinafter referred to as the “new standard”) , compiled by the National Technical Committee for Standardization of Personal Protective Equipment,  will be officially implemented on January 1, 2024. . This standard will officially replace GB 24541-2009 (hereinafter referred to as the “old standard”) and provide a standard basis for hand mechanical hazard protection products.
GB 24541-2022 “Protective gloves for hand protection against mechanical hazards”
GB 24541-2009 “Protective gloves for hand protection against mechanical risks” mainly refers to the European standard EN 388: 2003 (Protective gloves against mechanical risks). In November 2016, the European Union promulgated the EN 388: 2016 standard. Compared with EN 388: 2003, it mainly adds two technical requirements: cutting resistance (TDM) and impact resistance. In November 2018, the International Organization for Standardization released ISO 23388: 2018 (Protective gloves against mechanical risks) for the first time. This standard is equivalent to the EN 388: 2016 standard.

 

In December 2018, the European Union released the EN 388:2016+A1: 2018 standard, which standardized the canvas used in the cut resistance (Coupe) test, and also modified the CE certification requirements, the main technical requirements and testing of its standard The method has not changed. In this regard, GB 24541-2022 “Protective gloves for hand protection against mechanical hazards” was revised mainly with reference to the ISO 23388: 2018 standard.

The new standard GB 24541-2022 focuses on abrasion resistance, cutting resistance (round knife test method), tear resistance, puncture resistance, cutting resistance (straight knife test method), and impact resistance as Performance test metrics to better simulate common mechanical hazards in daily work environments.

The second half of 2023 is the transition period between the old and new standards. Compared with the old standards, what are the differences and changes in the new standards? Let’s take a look at the modified parts of the new version of the standard for better implementation in the future.

Update 1: Standard scope of application
GB 24541-2022 increases the scope of application of gloves. The standard is applicable to gloves that protect against mechanical hazards from wear, cutting, tearing, puncture or impact.
Update 2: Terms and Definitions
GB 24541-2022 updates the definition of mechanical hazard protective gloves, which refers to gloves used to protect at least one mechanical hazard risk from abrasion, cutting, tearing, and puncture. “Partially enhanced protective gloves” has been deleted and “number of frictions” has been added. The number of friction refers to the number of turns of the outer driving wheel of the Martindale abrasion tester.
Update Three: Technical Requirements
GB 24541-2022 mainly updates the following contents in terms of technical requirements:
  1. Added requirements for cutting resistance performance levels based on the straight knife test method in the general protection requirements
  2. Added impact protection requirements and impact resistance test methods
  3. Added test method for cutting resistance (straight knife test method)
  4. Added requirements for abrasion resistance, cutting resistance (disc knife test method), and tear resistance test reports
  5. Added normative requirements for abrasives and verification tests for double-sided tapes
1. General protection requirements
The new standard requires that the abrasion resistance, tear resistance and puncture resistance of mechanical hazard protective gloves should at least meet the minimum requirements listed in Table 1 Level 1, and the cut resistance should at least meet the minimum requirements listed in Table 1 Class 1 or the minimum requirement Class A listed in Table 2.

If the glove protection product has special protection areas or areas with special protection levels outside the regular test areas, these areas can be tested and the results reported in the instructions for use. Test Equipment: 

EMI straight knife cutting resistance performance analyzer
The EMI straight knife cutting resistance performance analyzer represented by Libero is a machine that performs cutting resistance performance analysis according to the EN ISO 13997 standard. The instrument uses the principle of an in-line Watt system that applies a constant force while the blade is moved perpendicularly above the specimen until the blade passes through the specimen. The measurement results are not affected by the thickness or direction of movement of the material during the cutting test.
Instron 34 Series Universal Material Testing Machine

Instron 34 series universal material testing machines are suitable for tensile, compression, bending, peeling, puncture, friction, shear and other tests. The rated load range is from 500N to 50kN. Intelligent pneumatic control device, when installing the sample to the chuck, the instrument will reduce the clamp closing pressure and limit the closing speed to reduce the risk of pneumatic clamp gripping. Can meet the testing requirements of almost any application or industry: plastics, metals, biomedicine, composites, elastomers, automotive, aerospace, textiles, etc.
2. Impact protection requirements
Each area claimed to be protected from impact shall be tested. Due to the test method (specimen size), it was not possible to test the impact protection of fingers. 

This type of gloves should be able to withstand an impact energy of 5J. After testing according to the prescribed method, the impact-resistant single transmission force value should not be greater than 9.0 kN, and the average transmission force should not be greater than 7.0 kN.
Update 4: Logo
GB 24541-2022 has changed the labeling method. After the implementation of the new standard, the mechanical properties of mechanical hazard protective gloves after January 2024 should be represented by the five performance level numbers given by the icon in Figure 11, icon example 1~ 3 The description is shown in Table 4. When a glove meets the requirements given by the prescribed tests, it can be claimed to be impact-resistant by adding the marking code “P” after the five performance class numbers (see example 1 in Table 4).
Update 5: Necessary information provided by the manufacturer in the instructions for use
The new standard adds the necessary information provided by the manufacturer in the instructions for use. The information should comply with the GB 42298-2022 standard and details of any special tests conducted in different environments should be provided. The information provided by the manufacturer should include a complete description of the test environment. If relevant, a warning should be included regarding two or more layers of gloves, and the overall classification does not necessarily reflect the performance of the outermost layer. If a product claims to have impact protection properties, it should state: the area protected and state that the protection does not apply to fingers. For mechanical hazard protective gloves that achieve and demonstrate tear resistance equal to or greater than Level 1, a statement should be included: Do not wear gloves when there is a risk of entanglement in mechanical moving parts.
Click to download the standard(Chinese Version)
Conclusion
GB/T 12624-2020 “General Test Methods for Hand Protection” is the technical standard for hand protection. The general requirements for gloves in all glove product standards should comply with its relevant requirements. As a product standard, GB 24541’s general requirements should also comply with the requirements of GB/T 12624-2020 “General Test Method for Hand Protection”. GB/T 29512-2013 “Guidelines for the Selection, Use and Maintenance of Hand Protection Gloves” is a management standard.

The new standard GB 24541-2022 “Protective Gloves for Hand Protection from Mechanical Hazards” combines the actual situation of domestic applications with more stringent requirements to better ensure the safety and reliability of users. Judging from the development of individual protective equipment standards, the emergency management standard system with “complete structure, clear hierarchy, scientific classification, strong standards as the mainstay, and strong promotion as complementary” is gradually being improved.

Libero has focused on the personal protective equipment industry for many years and has been committed to providing customers with professional and effective personal protection detection equipment solutions, including cold protection, heat damage protection, chemical protection, anti-static, mechanical hazard protection, etc., allowing users to safely Complete every job and help manufacturers improve production efficiency.
Read the original text: New Standard | GB 24541-2022 “Protective Gloves for Hand Protection Against Mechanical Hazards” Analysis
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