Högert Katalog Arbeitsschutzausrüstung Página 174
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STANDARDS EN EN343 PROTECTION AGAINST RAIN STANDARD x x x = material resistance to water penetration; x = resistance to water vapour. EN 343 The standard defines the definition of rules related to materials and seams in protective clothing. This standard allows effective prevention of rainfall (e.g. rain, snow), fog and moisture of the ground. Performance requirements: Resistance to water penetration (WP) in Pascal (Pa). When tested in accordance with paragraph EN 343, resistance to permeation of the external water material along with all watertight layers should be in accordance with the table below (divided into three classes – 1 to 3, – from the least to the most water-permeable). Class Resistance to water penetration 1 2 3 The sample should be tested as follows: – material before pre-treatment – pre-treated material Wp> 8 000 Pa is not required is not required Wp > 8000 Pa is not required Wp > 13000 Pa – seams before pre-treatment Wp > 8000 Pa Wp > 8000 Pa Wp > 13000 Pa a) The test is not required because for class 2 and class 3, the inferior condition occurs after pre-treatment Resistance to water vapour penetration (Ret) in (m².Pa) WP measures the breathability of clothing. During the test in accordance with paragraph 5.2 of EN 343, resistance to water vapour penetration of all layers of clothing should be in accordance with the table below (divided into three classes – from 1 to 3 – from less to the most breathing): Class Water vapour resistance m² x Pa/W 1 2 3 Ret <> 10 20 < Ret ≤ 40 Ret ≤ 20 a) Class 1 has a limited lifetime 172
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