BS 8428-2004 Protective clothing - Protection against liquid chemicals - Performance requirements for chemical protective suits with liquid-tight connections between different part.pdf

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1、BRITISH STANDARD BS 8428:2004 Incorporating Corrigendum No. 1 Protective clothing Protection against liquid chemicals Performance requirements for chemical protective suits with liquid-tight connections between different parts of the clothing for emergency teams (type 3-ET equipment) ICS 13.340.10 B

2、S 8428:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 January 2004 BSI 9 February 2004 The following BSI references relate to the work on this British Standard: Committee reference PH/3/3 Draft for comment 02/562256 DC ISBN 0 580 431

3、84 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PH/3, Protective clothing, to Subcommittee PH/3/3, Clothing for protection against chemicals, upon which the following bodies were represented: British Clothing Industr

4、y Association British Safety Industry Federation Test and Certification Association Chief and Assistant Chief Fire Officers Association Chemical Industries Association Fire Brigades Union Health and Safety Executive Institute of Occupational Medicine Institution of Occupational Safety and Health Lon

5、don Fire and Emergency Planning Authority NHS Purchasing and Supply Agency Office of the Deputy Prime Minister (Her Majestys Fire Services Inspectorate) Personal Safety Manufacturers Association SATRA Technology Centre Textile Services Association Limited Co-opted members Amendments issued since pub

6、lication Amd. No. Date Comments 15007 Corrigendum No. 1 9 February 2004 Correction to title on front coverBS 8428:2004 BSI 9 February 2004 i Contents Page Committee responsible Inside front cover Foreword ii 1S c o p e 1 2 Normative references 1 3T e r m s a n d d e f i n i t i o n s 1 4M a t e r i

7、a l s 2 5 Suit components 3 6 Seams, joins and assemblages 4 7 The whole suit 5 8M a r k i n g 6 9 Information supplied by the manufacturer 6 Bibliography 9 Table 1 Performance classes for chemical protective suit materials 2 Table 2 Test chemicals for permeation tests and their generic representati

8、on 3BS 8428:2004 ii BSI 9 February 2004 Foreword This British Standard has been prepared by Subcommittee PH/3/3. This British Standard is to be used in conjunction with BS EN 943 which specifies requirements for protective clothing against liquid and gaseous chemicals. This British Standard is also

9、to be used in conjunction with BS 7184 which gives guidance on the use and maintenance of chemical protective clothing. NOTE BS 7184 references prEN 466-2 as specifying requirements for liquid-tight chemical protective suits for emergency teams. However, prEN 466-2 is no longer being developed for p

10、ublication as a European Standard and so reference should be made to this British Standard, BS 8428, instead. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of its

11、elf confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 9 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.BS 8428:2004 BSI 9 February 2004 1

12、 1 Scope This standard specifies performance requirements for chemical protective suits with liquid-tight connections between different parts of the clothing for use by emergency teams, e.g. fire brigades, in situations where the chemical hazards are not immediately identifiable. This standard speci

13、fies performance requirements for both the materials of construction of the chemical protective suit and for the suit as a whole, including component parts, seams, joins and assemblages. This standard is applicable to reusable and limited-use chemical protective suits. Chemical protective clothing c

14、onforming to this standard is not designed to provide protection against gases and vapours. Performance requirements for gas-tight chemical protective suits for emergency teams are given in BS EN 943-2. NOTE Suits conforming to this standard can be suitable for use in situations other than those inv

15、olving purely chemicals, e.g. situations involving infective agents and radioactive contamination. Information supplied by suit manufacturers can indicate such additional performance applications. The chemical protection suits specified in this standard are designed to be used with respiratory prote

16、ctive devices. However, this standard does not specify requirements for respiratory protective devices. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the

17、latest edition of the referenced document (including any amendments) applies. BS EN 340, Protective clothing General requirements. BS EN 345-2:1997, Safety footwear for professional use Part 2: Additional specifications. BS EN 374-1, Protective gloves against chemicals and micro-organisms Part 1: Te

18、rminology and performance requirements. BS EN 463, Protective clothing Protection against liquid chemicals Test method: Determination of resistance to penetration by a jet of liquid (Jet test). BS EN 943-1:2002, Protective clothing against liquid and gaseous chemicals, including liquid aerosols and

19、solid particles Part 1: Performance requirements for ventilated and non-ventilated “gas-tight” (Type 1) and “non-gas-tight” chemical protective suits. BS EN 943-2:2002, Protective clothing against liquid and gaseous chemicals, including liquid aerosols and solid particles Part 2: Performance require

20、ments for “gas-tight” (Type 1) chemical protective suits for emergency teams (ET). PD CEN ISO/TR 11610, Protective clothing Glossary of terms and conditions. 1) 3 Terms and definitions For the purposes of this British Standard, the terms and definitions given in PD CEN ISO/TR 11610 1) , BS EN 943-2

21、and the following apply. 3.1 type 3-ET suit liquid tight chemical protective suit for use by emergency teams (ET) 3.2 type 3a-ET suit type 3-ET suit with a breathable air supply independent of the ambient atmosphere and worn inside the suit NOTE For example, when a self-contained open-circuit compre

22、ssed air breathing apparatus is worn inside a type 3-ET suit, it is considered a type 3a-ET suit. 1)In preparation.BS 8428:2004 2 BSI 9 February 2004 3.3 type 3b-ET suit type 3-ET suit with a breathable air supply worn outside the suit NOTE For example, when a self-contained open circuit compressed

23、air breathing apparatus is worn outside a type 3-ET suit, it is considered a type 3b-ET suit. 3.4 bootee sock-like extension of the chemical protective suit leg that covers the entire foot NOTE A bootee can be internal or external to any footwear worn. 3.5 exhaust assembly device that enables exhale

24、d air to be vented from a chemical protective suit to the atmosphere to prevent over-pressure within the suit NOTE An exhaust assembly can consist of one or more exhalation valves. 3.6 personal line length of cord fitted to breathing apparatus sets or chemical protective suits with the purpose of pr

25、eventing team members from getting separated from each other or lost in conditions of limited visibility NOTE For example, the line can be used to join one or more team members together or to join several team members to a fixed guide line. 4 Materials 4.1 General Materials used in the construction

26、of type 3-ET suits shall not be known to cause skin irritation or have any adverse effect to health. NOTE The materials used in the construction of type 3-ET suits should be as light and as flexible as possible in order to ensure wearer comfort as well as providing effective protection. 4.2 Mechanic

27、al properties Following pre-conditioning and conditioning in accordance with BS EN 943-1:2002, B.2.1 and B.2.2, type 3-ET suit material shall be tested and classified in accordance with BS EN 943-1 for the mechanical properties specified in Table 1. NOTE 1 Limited-use type 3-ET suits are not intende

28、d to be used repeatedly, therefore the performance classes specified in Table 1 to demonstrate the durability of limited-use type 3-ET suit material are in some instances different to those specified for type 3-ET suit material intended for repeated use. NOTE 2 If only class 2 is achieved for punctu

29、re resistance, the type 3-ET suit can be unsuitable for use where there is a high risk of puncture. Table 1 Performance classes for chemical protective suit materials Property BS EN 943-1:2002 subclause that specifies the test Performance class as defined in BS EN 943-1:2002 Limited-use suits Reusab

30、le suits Abrasion resistance B.2.3 Class 4 Class 6 Flex cracking resistance B.2.4 Class 1 Class 4 Flex cracking resistance at low temperatures (30 C) B.2.5 Class 2 Class 2 Trapezoidal tear resistance B.2.6 Class 3 Class 3 Tensile Strength B.2.8 Class 4 Class 6 Puncture resistance B.2.9 Class 2 Class

31、 3 Resistance to flame B.2.14 Class 1 Class 3BS 8428:2004 BSI 9 February 2004 3 4.3 Chemical permeation Following pre-conditioning and conditioning in accordance with BS EN 943-1:2002, B.2.1 and B.2.2, the chemical permeation resistance of type 3-ET suit material shall be tested and classified in ac

32、cordance with BS EN 943-1:2002, B.2.10 for each of the liquid and gaseous standard test chemicals specified in Table 2. If the type 3-ET suit material only achieves class 2 or lower after testing with a chemical in accordance with BS EN 943-1:2002, B.2.10, the chemical suit material shall be unsuita

33、ble for use with this chemical under continuous exposure. NOTE 1 The list of permeation test chemicals specified in Table 2 is not inclusive of all the chemicals for which the type 3-ET suit may be used. NOTE 2 The standard test chemicals in Table 2 are representative of a number of different groups

34、 of chemicals regardless of their physical state (i.e. their generic representation). However, acceptable permeation performance of a type 3-ET suit material against chemicals, other than those listed, in no way implies that the design of a type 3-ET suit is adequate protection against that chemical

35、. Such a chemical should be tested and classified on an individual basis in accordance with BS EN 943-1:2002, B.2.10. NOTE 3 Despite obtaining favourable permeation performance results, exposure of the type 3-ET suit material to a given chemical or chemicals can result in significant chemical permea

36、tion into that material. After operational use, the user should ascertain whether permeation has occurred and, if so, whether such permeation either presents a hazard to subsequent wearers or compromises the future level of protection afforded by the material. Table 2 Test chemicals for permeation t

37、ests and their generic representation 5 Suit components 5.1 General Following pre-conditioning and conditioning in accordance with BS EN 943-1:2002, B.2.1 and B.2.2, the type 3-ET suit components specified in 5.2 to 5.7 shall be tested and classified for resistance to chemical permeation in accordan

38、ce with 4.3. For safety footwear, the test specimen for chemical permeation testing shall be taken from the thinnest point of the footwear above the join to the sole. 5.2 Protective gloves Permanently fitted or detachable protective gloves shall conform to BS EN 374-1. NOTE As BS EN 374-1 specifies

39、only very limited mechanical and thermal requirements for protective gloves, an over-glove, e.g. conforming to BS EN 659, can be used to provide greater mechanical and thermal protection. Test chemical Physical state Generic representation Dichloromethane Liquid Chlorinated hydrocarbon Methanol Liqu

40、id Primary alcohol n-Heptane Liquid Saturated hydrocarbon Toluene Liquid Aromatic hydrocarbon Diethylamine Liquid Amine Sodium hydroxide 40 % Liquid Inorganic base Sulfuric acid 96 % Liquid Inorganic mineral acid Ammonia Gas Basic gas Chlorine Gas Halogen gas Hydrogen chloride Gas Inorganic gas Acet

41、one Liquid Ketone Acetonitrile Liquid Nitrile compound Ethyl acetate Liquid Ester Carbon disulfide Liquid Sulfur containing organic compound Tetrahydrofuran Liquid Heterocyclic and ether compoundBS 8428:2004 4 BSI 9 February 2004 5.3 Safety footwear Permanently fitted or detachable safety footwear,

42、including external bootee supplied by the manufacturer shall conform to safety footwear type FPA as specified in BS EN 345-2:1997, Clause 7. An integral sock or integral bootee shall provide at least the same level of protection as the material from which the type 3-ET suit is manufactured, i.e. as

43、a minimum the integral sock or integral bootee shall conform to Clause 4. 5.4 Visor Where a visor is fitted as part of the type 3-ET suit, it shall conform to BS EN 943-1:2002, 5.5. NOTE A visor is not the same as a facemask integral to, attached permanently to or detachable from a type 3-ET suit. I

44、f there is any visual indication of the visor distorting vision after being tested in accordance with 4.3, the visor shall be tested in accordance with BS EN 943-2:2002, 8.2. The visor shall not distort vision when exposed to each of the chemicals listed in Table 2. 5.5 Facemask Where a facemask is

45、integral to, attached permanently to or detachable from the type 3-ET suit, it shall conform to BS EN 943-1:2002, 5.6. 5.6 Exhaust assembly A type 3a-ET suit shall be fitted with an exhaust assembly. A type 3b-ET suit shall be fitted with an exhaust assembly if the exhalation valve of the respirator

46、y protective equipment is not free to discharge directly into the atmosphere, or where supplementary air for ventilation is supplied to the chemical protection suit. NOTE The exhaust assembly fitted to a type 3-ET suit may consist of one or more exhaust valves. 5.7 Pass-through for use with self-con

47、tained breathing apparatus Where a pass-through is fitted as part of the type 3-ET suit, it shall conform to BS EN 943-1:2002, 5.7. NOTE As type 3-ET suits are intended for use in emergency situations, the inclusion of a pass-through should be considered on type 3a-ET suits. This is to ensure that a

48、 breathable air supply is maintained should a lengthy period of decontamination be necessary following exposure to hazardous chemicals. 6 Seams, joins and assemblages 6.1 General The type 3-ET suit shall be tested as a whole, including component parts such as gloves or boots that are integral to the

49、 suit, when tested in accordance with 6.2 to 6.6. 6.2 Resistance of closures or closure assemblies to chemical permeation Following pre-conditioning and conditioning in accordance with BS EN 943-1:2002, B.3.2 and B.3.3, the type 3-ET suit closures or closure assemblies shall be tested and classified for resistance to chemical permeation in accordance with 4.3. The breakthrough time shall be at least 5 min for each chemical specified in Table 2. If a breakthrough time of between 5 m