EN 374: Protective gloves against hazardous chemicals and micro-organisms
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DIN EN ISO 374-1:2016 + A1:2018: Protective gloves against hazardous chemicals and micro-organisms - Part 1: Terminology and performance requirements for chemical hazards
Scope of application
This standard specifies the characteristics of gloves for the protection of the user against chemicals and/or micro-organisms. It applies in conjunction with the basic standard DIN EN 420 and does not specify requirements against any hazards due to mechanical stress. Reference is made here to DIN EN 388.
Classification
DIN EN 374 consists of several parts. It specifies the requirements for gloves that protect the user against chemicals and/or microorganisms
EN 374-1: Terminology and performance requirements
This standard specifies requirements that protect the user against chemicals and/or micro-organisms and defines the common terminiffe.
EN 374-2: Determination of resistance to penetration by chemicals
This standard describes a test method for the resistance to penetration of gloves protecting against chemicals and/or micro-organisms.
DIN EN374-4: Determination of resistance to degradation by chemicals
This standard deals with the determination of the resistance of Werkstoffen for protective gloves to degradation by potentially hazardous non-gaseous chemicals.
EN 16523-1: Determination of resistance to permeation by chemicals
This standard covers the determination of the resistance of protective glove materials to the permeation of potentially hazardous non-gaseous chemicals under the condition of continuous contact.
Requirements
Penetration
It refers to the penetration of a chemical and/or micro-organism (at a non-molecular level) into a protective glove through porous areas, seams, pinholes or other defects. Gloves must be leak-proof when tested according to the test methods specified in the relevant sections of EN 374-2 (air leakage and water leakage test). This test is carried out using the AQL value (acceptance quality limit) according to ISO 2859.
Performance index | AWL value | Test level |
Grade 3 | < 0.65 | G1 |
Grade 2 | < 1.5 | G1 |
Grade 1 | <4.0 | S4 |
Permeation
This term means the breakthrough times it takes for a hazardous liquid to come into contact with the skin. All chemical tests are classified in breakthrough times (performance level 0 to 6).
Performance level | breakthrough time |
Class 1 | > 10 minutes |
Class 2 | > 30 minutes |
Class 3 | > 60 minutes |
Grade 4 | > 120 minutes |
Grade 5 | > 240 minutes |
Grade 6 | > 480 minutes |
A glove is considered resistant to the permeation of chemicals and is classified into different types if the following conditions are met:
- Type A: At least level 2 against at least six test chemicals*
- Type B: At least level 2 against at least three test chemicals*
- Type C: At least level 2 against at least one test chemical*
The applicable code letters of the chemicals must be specified.
code letter | *Test chemical. | CAS number | Class |
A | Methanol | 67-56-1 | Primary alcohol |
B | Aceton | 67-64-1 | Ketone |
C | Acetonitrile | 75-05-8 | Nitrile compound. |
D | Dichloromethane | 75-09-2 | Chlorinated paraffin wax |
E | Carbon disulphide | 75-15-0 | Sulphur-containing organic compound |
F | Toluene | 108-88-3 | Aromatic hydrocarbon. |
G | Diethylamine | 109-89-7 | Amin |
H | Tetrahydrofuran | 109-99-9 | Heterocyclic and ether compounds. |
I | Ethyl acetate | 141-78-6 | Ester |
J | n-Heptane | 142-85-5 | Aliphatic hydrocarbonstoff |
K | Sodium hydroxide 40% | 1310-73-2 | Inorganic base |
L | Sulphuric acid 96%. | 7664-93-9 | Inorganic acid |
M | Nitric acid 65%. | 7697-37-2 | Inorganic acid, oxidising. |
N | Acetic acid 99%. | 64-19-7 | Organic acid |
O | Ammonia water 25% | 1336-21-6 | Organic base |
P | Hydrogen peroxide 30% | 7722-84-1 | Peroxide |
S | Fluoric acid 40% | 7664-39-3 | Inorganic acid |
T | Formaldehyde 37% | 50-00-0 | Aldehyde |
Definition & Labelling
The identification letters of the test chemicals used must be visible below the pictogram and the corresponding indication of the protection type must be indicated above the pictogram.
Definition & Labelling Definition & Labelling