STANDARD EN 374:2003

GLOVES GIVING PROTECTION FROM CHEMICALS AND MICRO-ORGANISMS

Scope:

This standard specifies the requirements for gloves to protect the user against chemicals and micro-organisms and defines terms to be used.

TERM DEFINITIONS

Penetration

Movement of a chemical or micro-organism through porous materials, seams, pinholes or other imperfections in a protective glove material on a non-molecular level.

Permeation

  • Process by which a chemical moves through a protective glove material on a molecular level. Permeation involves the following:
  • Absorption of molecules of chemicals on the contacte (outside) surface of a material;
  • Diffusion of the absorbed molecules in the material; and
  • ┬áDesorption of the molecules from the opposite (inside) surface of the material.

Breakthrough Time

The time elapsed between the initial application of the chemical to the outside of a protective glove material and its subsequent presence on the inside as measured in EN 374 part 3 and defined as the time when the permeation rate equates to 1 microgram per minute per square cm.

REQUIREMENTS

Minimum Liquid Proof

The minimum liquid proof portion of the glove must be equal to or greater than the minimum length of the glove as detailed in EN 420

Penetration

Gloves must not leak when subjected to an air or water leak test.

Performance
Level
Acceptable Quality
Level Unit
Inspection
Levels
Level 3 <0.65 G1
Level 2 <1.5 G1
Level 1 <4.0 S4

Permeation

Chemicals are tested and classified for breakthrough time on a scale of 0

Breakthrough
Time
Protection
Index
>10 min class 1
>30 min class 2
>60 min class 3
Breakthrough
Time
Protection Index
>120 mins class 4
>240 mins class 5
>480 mins class 6

Warning

Warning: Chemical information does not necessarily indicate workplace duration.

Code
Letter
Chemical Cas # Class
A Methanol 67-56-1 Primary Alcohol
B Acetone 67-54-1 Ketone
C Acrylonitrile 75-05-8 Nitrile Compound
D Dichloromethane 75-09-2 Chlorinated Paraffin
E Carbon disulphide 75-15-0 Sulphur containing
Organic Compound
F Toluene 108-88-3 Aromatic Hydrocarbon
G Diethylamine 108-89-7 Amine
H Tetrahydrofuran 109-99-9 Heterocyclic and Ether
Compound
I Ethyl Acetate 141-78-6 Ester
J n-Heptane 142-82-5 Saturated Hydrocarbon
K Sodium Hydroxide 40% 1310-73-2 Inorganic Base
L Sulphuric Acid 96% 7664-
93-9
Inorganic Mineral Acid

Chemical Resistant

The Chemical Resistant glove pictogram must be accompanied by a three-digit code referring to the code letters of three chemicals (from a list of 12 standard defined chemicals), for which a breakthrough time of at least 30 minutes is achieved.

Waterproof/Low Chemical Resistant

A Waterproof/Low Chemical Resistant pictogram is reserved for cases where gloves did not achieve a breakthrough time of 30 minutes or greater for at least three defined chemicals, but do comply with penetration
testing.

Micro-organism

A glove shall be considered micro-organism resistant if it conforms to at least level 2 in the Penetration test of EN 374 shown in the table in the column opposite.

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