【正文】 rd. If more than one size of the suit is manufactured the subjects are asked to select the appropriate size. Two devices shall be tested, each being tested on one subject. After fitting the suit, each test subject is asked Does the suit fit? If the answer is Yes continue the test If the answer is No, take the test subject off the panel and report the fact. Work simulation tests All tests shall be carried out by two test subjects at temperature (20 177。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 protection as the fabric from which the chemical protective suit is manufactured. Visor The visor shall meet the requirements of of prEN 9431:2020 as well as the requirements given below. When tested in accordance with the visor shall pass for each chemical listed in . This test shall only be carried out with those test chemicals for which the test according to has led to any indication of harm to the visibility. 6 Performance requirements for seams, joins and assemblages NOTE The requirements of this clause apply to the garment as a whole including ponent parts, such as gloves or boots, that are integral to the garment. The seams, joins and assemblages attaching these accessories are included within the scope of this European Standard. The performance criteria for the accessories (gloves, boots or RPE) are given in other European Standards. Resistance to permeation of closures by chemicals Closures or closure assemblies shall be tested in accordance with for each chemical listed in Table 2. The breakthrough time shall be at least 5 min for each chemical. The test cell according to EN 3743 has to be modified for testing of closures to ensure that the sample can be fitted tightly into the cell. If the closure or closure assembly fails to meet level 2 the closure or closure assembly shall be protected by a flap or cover to reduce the risk of liquid chemical contact. Resistance to permeation of seams by chemicals Seams shall be tested and classified in the same way as materials in accordance with , and the performance classification ratings shall be reported in the instruction for use of 8 d) of prEN 9431:2020 in the same way as for chemical protective clothing materials. If a seam or closure is rated only class 1 for a chemical listed in Table 2 the instructions for use shall indicate that the chemical protective suit is not suitable for use against this chemical under continuous exposure. Seam strength The seam strength of the chemical protective suit shall fulfil the requirements of clas