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EN 943-1/2

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International Testing&Certification

EN 943-1/2

Protective clothing against dangerous solid, liquid and gaseous chemicals, including liquid and solid aerosols – Part 1&2: Performance requirements for Type 1 (gas-tight) chemical protective suits

as-Tight chemical protective clothing:

a) Gas-tight chemical protective clothing with internal self-contained breathing apparatus (Type 1a)

b) Gas-tight chemical protective clothing with external self-contained breathing apparatus (Type 1b)

c) Supplied air gas-tight chemical protective clothing (Type 1C)

Non Gas-Tight chemical protective clothing:

a) Non gas-tight chemical protective clothing for protection against gas (Type 2)

Performance and Test Method
Finished Chemical Protective Clothing 

Leak-tightness
The test on leak-tightness is required for every type of gas-tight chemical protective clothing. The inside of chemical protective clothing is constantly pressurised at a certain level and the leak-tightness of the entire chemical protective clothing is checked based on a stipulated limit for pressure drop after
a certain length of time. The test method and judgement criteria are compatible with standard EN 943-1/2.

Inward leakage
The test on the inward leakage is required for gas-tight chemical protective clothing to be worn at the time of chemical/biological terrorism incidents and gas-tight chemical protective clothing with external self-contained breathing apparatus (Type 1b) where the mask, of which the face-piece acts as the visor for the chemical protective clothing, is attached externally. After a predetermined exercise by a person wearing an actual chemical protective clothing, the inflow quantity of contaminants in the environment to the chemical protective clothing is measured. In the case of a chemical protective clothing with external self-contained breathing apparatus (Type 1b) where the mask, of which the face-piece acts as the visor for the chemical protective clothing, is attached externally, this standard demands the test on the leakage rate inside the suit in consideration of absorption by the skin in addition to the test on the inward leakage inside the face-piece. Apart from this additional demand, the test method and judgement criteria are compatible with standard and EN 943-1/2.

Lifeline Attached to Self-Contained Breathing Apparatus
This test is required for a gas-tight chemical protective clothing with internal self-mounted breathing apparatus (Type 1a) to which a lifeline is attached. The test is designed to check the impacts of the practical performance test on the lifeline to be attached to the self-contained breathing apparatus and the connection as well as strength of the attachment. The test method and judgement criteria are
equivalent to those of standards EN 943-1/2.

External Ventilation Hose
This test is required for a gas-tight chemical protective clothing with external self-contained breathing apparatus (Type 1b) equipped with an external ventilation hose. The test is designed to check the impacts of the practical performance test on the external ventilation hose, strength of the connection
with the chemical protective clothing and resistance of the hose against collapse. The test method and judgement criteria are equivalent to those of standards and EN 943-1/2.

Tensile Strength
The tensile strength required of the materials for Level A chemical protective clothing is set at equivalent to the minimum required level of EN 943-1/2 for both limited use and reusable types. In the case of the materials for Level B and Level C chemical protective clothing, the required level in this standard is set at equivalent to the minimum required level in the because of the absence of a relevant provision of EN 943-1/2. In the case of the materials for Level D chemical protective clothing, as the required strength is not as high as that of the materials for Level B and Level C chemical protective clothing of both limited use and reusable types, the minimum required level for limited use or reusable type clothing is set at one class lower than the corresponding class
required of the materials for Level B and Level C chemical protective clothing.

Tear Strength
The tear strength required of the materials for Level A chemical protective clothing is set at equivalent to the minimum required level of EN 943-1/2 for both limited use and reusable types. In the case of the materials for Level B and Level C chemical protective clothing for which EN 943-2 does not have any relevant provisions, the minimum required level for the limited use type is set at equivalent to the minimum required level of the while the minimum required level for the reusable type is set at equivalent to the minimum required level for the materials for the reusable type of Level A chemical protective clothing. In the case of the materials for Level D chemical protective clothing, as the required strength is not as high as that for the materials for Level B and Level C chemical protective clothing of both the limited use and reusable types, the minimum required level for limited use or reusable types is set at one class lower than the corresponding class required of the materials for Level B and Level C chemical protective clothing.

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