Stego Catalogue

International standards

Letter Code

Chemical Methanol Acetone

CAS Number 67-56-1 67-64-1 75-05-8 75-09-2 75-15-0 108-88-3 109-89-7 109-99-9 141-78-6 142-85-5 1310-73-2 7664-93-9 7697-37-2

Class

A B C D E

Primary alcohol

Ketone Nitrile

Acetonitrile

Dichloromethane Carbon disulphide

Chlorinated hydrocarbon

Organic compound containing sulphur

F

Toluene

Aromatic hydrocarbon

G H

Diethylamine

Amine

Tetrahydrofurane

Heterocyclic ether

I

Ethyl acetate

Ester

J K L

n-Heptane

Saturated hydrocarbon

Caustic soda 40% Sulphuric acid 96% Nitric acid 65% Acetic acid 99% Ammonia 25%

Inorganic base

Inorganic mineral acid

M

Inorganic mineral acid, oxidising

N O P S

64-19-7

Organic acid Organic base

1336-21-6 7722-84-1 7664-39-3

Hydrogen peroxide 30% Hydrofluoric acid 40%

Peroxide

Inorganic mineral acid

T

Formaldehyde 37%

50-00-0

Aldehyde

The permeation performance levels remain unchanged

Level

Level 1 Level 2 Level 3 Level 4 Level 5 Level 6

Measured breakthrough time (mins.)

>10

>30

>60

>120

>240

>480

EN 374-2:2014 ‘Determination of resistance to penetration. This standard replaces EN 374-2:2003. There are no major or technical changes. This standard specifies a test method for the penetration resistance of gloves that protect against dangerous chemicals and/ or micro-organisms (water leak and air leak test) The main changes in comparison to EN 374-2:2003 are: • Clearer wording in test principles and test report. • Performance levels (AQL) for use in production control still given by the manufacturer or auditing organization.

Performance level

Unit of acceptable quality level

ISO 2859 inspection levels

Level 3

< 0,65

G1

Level 2 Level 1

< 1,5 < 4,0

G1 S4

EN 16523-1:2015 ‘Determination of material resistance to permeation by chemicals. Permeation by liquid chemical under conditions of continuous contact’ is the new test method standard, which replaces the withdrawn EN 374-3:2003. EN 374-4:2013 ‘Determination of resistance to degradation by chemicals This standard has become a mandatory test for all gloves that offer chemical protection, as required by ISO 374-1:2016 clause 5.3. Degradation is the change in the physical characteristics of a glove caused by contact with a chemical.

These are new test methods considering the glove before and after a contact with the chemical. - Normative: Puncture Degradation Resistance test (as per the EN388 test for puncture resistance) - Informative: Weight Change test

The results are reported in Instruction for Use as percentage of change due to degradation in perforation test.

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