BS 343:2019 pdf download – Protective clothing – Protection against rain

BS 343:2019 pdf download – Protective clothing – Protection against rain Pretreatment is carried out except for outside coated shell material in accordance with EN 530:2010,Method 2, with the following specifications: — abradant and glass cloth with abrasive grain in accordance with EN 388; — pressure to the specimen: (9 ± 0,2) kPa; — number of cycles: 1 000; remove debris after 500 cycles; — abradant replacement after each pretreatment. For outside coated shell material pretreatment shall be carried out in accordance with EN ISO 12947-1 and −2, with the following specifications and modifications: — abradant: standard woollen cloth in accordance with EN ISO 12947-1; — the abradant is mounted in the upper sample holder; the specimen to be tested is mounted in the lower (larger) sample holder; — pressure to the specimen: (9 ± 0,2) kPa; — number of cycles: 25 000; remove debris after 10 000 cycles; — abradant shall be replaced after each pretreatment. 5.4 Pretreatment by repeated flexing Pretreatment is carried out on the lines of EN ISO 7854:1997, method C, and with the following deviations: — 2 specimens shall be tested in longitudinal direction; — 2 specimens shall be tested in cross direction; — number of cycles shall be 9 000. 5.5 Pretreatment with fuel and oil 2 specimens shall be submitted to pretreatment with fuel and 2 specimens shall be submitted to pretreatment with oil in accordance with ISO 1817. The specimens consisting of the outer shell material combined with any applied waterproof layer shall be arranged in the test device (see Figure B.1) in such a way that the surface to be tested faces upwards and is in direct contact with the test agent. The test vessels shall be made of materials that are resistant to the test agent. They shall be tight enough, when closed, to prevent diffusion to ambient atmosphere. Test agents: 1) Liquid A: Isooctane (2,2,4-trimethylpentane), percentage by volume 100 %; in accordance with ISO 1817; 2) Liquid F: Test oil: straight-chain paraffins (C 12 to C 18 ), 80 % by volume and 1-methylnaphthalene,20 % by volume in accordance with ISO 1817; — quantity of test agents: (50 ± 5) ml; — test temperature: (20 ± 2) °C; — duration of exposure: 60 min. After removal of the specimens from the test device, any test agent remaining on them shall be carefully removed with absorbent filter paper. The test...