bsen943-2-20xxprotectiveclothingagainstliquidandgaseouschemicalsincludingliquidaerosolsandsol

bsen943-2-20xxprotectiveclothingagainstliquidandgaseouschemicalsincludingliquidaerosolsandsol内容摘要：

breathable air supply independent of the ambient atmosphere, . a self contained opencircuit pressed air breathing apparatus, worn inside the chemical protective suit type 1bET “gastight” chemical protective suit gastight chemical protective suit for use by emergency teams with a breathable air supply, . a self contained opencircuit pressed air breathing apparatus, worn outside the chemical protective suit As chemical protection is used with respiratory devices, special attention shall be given to the adequate selection of respiratory protective equipment. The limiting factors for the use of filters (. oxygen deficiency) shall be taken into consideration. attachment point fixing to the outside of the chemical protective suit to enable equipment required to be fitted, . a torch EN 9432:2020 (E) 5 4 General The chemical protective suits type 1aET and type 1bET shall fulfil the requirements of prEN 9431. Beyond that the additional or restrictive requirements of this European Standard shall be fulfilled. The performance class requirements given below are the minimum performance requirements. NOTE 1 The mechanical performance requirements for ponent parts such as gloves, safety footwear etc. are specified in other relevant EN39。 s. NOTE 2 As these chemical protective suits are intended for use in emergency situations it is remended that the use of a ―passthru‖ on type 1aET suits is considered, even though this is an optional requirement. 5 Performance requirements of chemical protective clothing materials General The chemical protective clothing shall meet the requirements given in Table 1, when tested in preconditioned condition against the appropriate clause of prEN 9431. NOTE Because limiteduse protective clothing is not intended to be used repeatedly the performance requirements required to demonstrate the durability of the protective clothing material are different to those for materials intended for repeated use. As a consequence, abrasion resistance and flex cracking resistance performance levels are specified differently for limited use and reusable chemical protective clothing materials. Table 1 — Minimum performance requirements of chemical protective clothing materials Performance class Performance class Property Testing reference Limiteduse suits Reusable suits Abrasion resistance prEN 9431 Class 4 Class 6 Flex cracking resistance prEN 9431 Class 1 Class 4 Flex cracking resistance at low temperatures (30176。 C) prEN 9431 Class 2 Class 2 Trapezoidal tear resistance prEN 9431 Class 3 Class 3 Tensile Strength prEN 9431 Class 4 Class 6 Puncture resistance prEN 9431 Class 2 Class 3 Resistance to flame prEN 9431 Class 1 Class 3 If only Class 2 is achieved for Puncture resistance the instructions for use shall identify that the chemical protective clothing may not be suitable for use where there is a high risk of puncture. Resistance to permeation by chemicals of chemical protective clothing material, safety footwear, gloves and visor (if fitted) The chemical protective clothing material, safety footwear, gloves and visor if fitted, shall be tested for resistance to permeation against the following liquid and gaseous standard test chemicals given in Table 2: EN 9432:2020 (E) 6 Table 2 — Chemicals for permeation tests Physical state Generic representation 1) Dichloromethane liquid Chlorinated hydrocarbon 2) Methanol liquid Primary alcohol 3) nHeptane liquid Saturated hydrocarbon 4) Toluene liquid Aromatic hydrocarbon 5) Diethylamine liquid Amine 6) Sodium Hydroxide 40% liquid Inanic base 7) Sulphuric Acid 96% liquid Inanic mineral acid 8) Ammonia gas Basic gas 9) Chlorine gas Halogen gas 10) Hydrogen Chloride gas Inanic acid gas 11) Acetone liquid Ketone 12) Acetonitrile liquid Nitrile pound 13) Ethyl Acetate liquid Ester 14) Carbon Disulphide liquid Sulphur containing anic pound 15) Tetrahydrofuran liquid Heterocyclic and ether pound When tested according to annex B of prEN 9431:2020 the class for each of the chemicals in the test battery shall be identified in the instructions for use. If class 2 is not achieved for any material or ponent part tested the instructions for use shall identify that this chemical protective suit is not suitable for use for this chemical under continuous exposure. For safety footwear the test specimen shall be taken from the thinnest point of the footwear above the join to the sole. NOTE The test chemicals identified above have been selected to represent a range of aggressive chemicals so as to ensure that chemical protective suit which meets the requirements of this European Standard will offer protection against a wide range of chemicals (Classes and Properties). However, it should be recognised that this approach only provides basic guidance against groups represented by these chemicals and that the performance against chemicals other than those listed can only be determined by individual tests. Protective gloves and safety footwear Protective gloves Protective gloves shall also meet the requirements of EN 3741. NOTE As EN 3741 has only very limited mechanical and thermal requirements it may be necessary to use an overglove . according to EN 659 to provide greater mechanical and thermal protection. EN 9432:2020 (E) 7 Safety footwear Where safety footwear is fitted it shall also meet the requirements of clause 7 of EN 3452:1996 (Type FPA). Where safety footwear is not permanently fitted to the chemical protective suit any external bootee supplied by the manufacturer shall ply with the requirements of clause 7 of EN 3452:1996 (Type FPA). An integral sock or bootee shall provide at least the same level of。