DIN EN ISO 12127-2-2008 Clothing for protection against heat and flame - Determination of contact heat transmission through protective clothing or constituent materials - Part 2 Te.pdf

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1、April 2008DEUTSCHE NORM English price group 11No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 13.340.10!$Mj“1427199www

2、.din.deDDIN EN ISO 12127-2Clothing for protection against heat and flame Determination of contact heat transmission through protective clothingor constituent materials Part 2: Test method using contact heat produced by dropping smallcylinders (ISO 12127-2:2007)English version of DIN EN ISO 12127-2:2

3、008-04Schutzkleidung gegen Hitze und Flammen Bestimmung des Kontaktwrmedurchgangs durch Schutzkleidung oder -materialien Teil 2: Prfverfahren, bei dem Kontaktwrme erzeugt wird durch kleine fallende Zylinder(ISO 12127-2:2007)Englische Fassung DIN EN ISO 12127-2:2008-04www.beuth.deDocument comprises 1

4、8 pagesDIN EN ISO 12127-2:2008-04 2 Start of validity This standard is valid from 1 April 2008. National foreword This standard includes safety requirements. This standard has been prepared by Technical Committee ISO/TC 94 “Personal safety Protective clothing and equipment”, Subcommittee SC 13 “Prot

5、ective clothing” in collaboration with Technical Committee CEN/TC 162 “Protective clothing including hand and arm protection and lifejackets” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Persnliche Schutz-ausrstung (Personal Protective

6、Equipment Standards Committee), Technical Committee NA 075-05-02 AA Schutzkleidung gegen Hitze und Feuer. This standard specifies a new test method and does not supersede DIN EN 348:1992-11. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12127-2 December 2007 ICS 13.340.10 English Version

7、Clothing for protection against heat and flame - Determination of contact heat transmission through protective clothing or constituent materials - Part 2: Test method using contact heat produced by dropping small cylinders (ISO 12127-2:2007) Vtements de protection contre la chaleur et la flamme - Dt

8、ermination de la transmission thermique par contact travers les vtements de protection ou leurs matriaux constitutifs - Partie 2: Mthode dessai utilisant la transmission thermique par contact produite par des petits cylindres compte-gouttes (ISO 12127-2:2007) Schutzkleidung gegen Hitze und Flammen -

9、 Bestimmung materialien - Teil 2: Prfverfahren, bei dem Kontaktwrme erzeugt wird durch kleine fallende Zylinder (ISO 12127-2:2007) This European Standard was approved by CEN on 21 September 2007. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions

10、 for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three off

11、icial versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austri

12、a, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITT

13、EE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 12127-2:2007: Edes Kontaktwrmedurc

14、hgangs durch Schutzkleidung oder -2 EN ISO 12127-2:2007 (E) DIN EN ISO 12127-2:2008-04 Foreword 3 Introduction 4 1 Scope 5 2 Terms and definitions . 5 3 Principle . 6 4 Apparatus and materials 7 5 Specimens 12 6 Procedure. 12 6.1 Conditioning 12 6.2 Preliminary procedure 12 6.3 Testing 12 7 Precisio

15、n 14 8 Report . 14 Annex A (informative) Precision 15 Annex ZA (informative) Relationship between this International Standard and the Essential Requirements of EU Directive 89/686/EEC Personal protective equipment (PPE) 16 Page Contents Foreword 3 This document (EN ISO 12127-2:2007) has been prepare

16、d by Technical Committee ISO/TC 94 “Personal safety - Protective clothing and equipment“ in collaboration with Technical Committee CEN/TC 162 “Protective clothing including hand and arm protection and lifejackets“, the secretariat of which is held by DIN. This European Standard shall be given the st

17、atus of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2008, and conflicting national standards shall be withdrawn at the latest by June 2008. Attention is drawn to the possibility that some of the elements of this document may be the subject

18、 of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EC Directive(s).

19、For relationship with EC Directive(s), see informative Annex ZA, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, C

20、yprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO

21、 12127-2:2007 has been approved by CEN as a EN ISO 12127-2:2007 without any modification. EN ISO 12127-2:2007 (E) DIN EN ISO 12127-2:2008-04 Introduction Protective clothing designed to protect the welders is exposed to high-temperature particles generated from the welding point into the welding env

22、ironment. These hot particles are small splashes of molten metal, sparks and slag. When the small splashes of molten metal are scattered, they produce heat into the atmosphere, become oxidized and start to change from a molten state into a solidified state. The diversity of the conditions in which s

23、plashes of molten metal and other hot particles may come into contact with materials used for welders protective clothing makes it difficult to evaluate the hazards that may arise under conditions of use. The most important protective function is resistance to heat transfer through the layers of clo

24、thing from high-temperature metal drops, sparks and solidified hot particles trapped on the fabric in folds or in seamed areas. The test method described in this part of ISO 12127 allows this heat transfer to be assessed when a hot steel cylinder simulating a small hot particle is allowed to fall on

25、 the material. Furthermore, this method can be used to assess charring and hole formation in the material. This part of ISO 12127 forms a part of a series of standards concerned with clothing designed to protect against heat and fire. This part of ISO 12127 is especially used to assess the consequen

26、ces for protection of the impact of small hot metal particles on clothing materials. ISO 12127-1 is a revision of ISO 12127:1996. 4 DIN EN ISO 12127-2:2008-04 EN ISO 12127-2:2007 (E) 1 Scope This part of ISO 12127 specifies a test method designed to evaluate the heat transfer and the behaviour of ma

27、terials used for protective clothing when such materials are struck by high temperature metal particles, especially when these are trapped in the folds of the garment in working saituations. The results obtained by this method permit the comparison of the behaviour of different materials which have

28、undergone this test under standardized conditions. They do not permit conclusions to be drawn with respect to contacts with large splashes of molten cast iron or other metal, nor do they allow the behaviour of complete garments under industrial conditions to be predicted. 2 Terms and definitions For

29、 the purposes of this document, the following terms and definitions apply. 2.1 maximum temperature Tmaxmaximum temperature of the calorimeter after contact of the cylinder with the sample 2.2 starting temperature T0temperature of the calorimeter at the starting point of the temperature measurement 2

30、.3 start of the temperature measurement start the temperature measurement at the exact time when the solenoid is switched on 2.4 temperature difference T change in temperature between the maximum temperature reached and the temperature of the calorimeter at the start of temperature measurement (T =

31、Tmax T0) 2.5 cone temperature Tctemperature of the cone when removed from the oven 5 DIN EN ISO 12127-2:2008-04 EN ISO 12127-2:2007 (E) 2.6 hole scorched break in the test specimen caused by charring or melting of the material NOTE The break is assessed as a hole if threads or construction of the ma

32、terial have been clearly diminished or deteriorated, when viewed with the aid of a magnifying glass, in which case a comparison is made of the new and test samples. 3 Principle This test method consists of two phases, which are carried out in order. In the first phase of this method, a hot steel cyl

33、inder is allowed to fall on a point on a horizontally oriented test specimen, which is then checked for the formation of a hole. The hole formation is assessed immediately after the sample is gently unfastened from the counterweights, if used. No mechanical stress shall be deliberately applied to th

34、e sample before examination. In the second phase, the maximum temperature difference is measured for the materials that passed the first phase. Changes in appearance of the specimen are recorded. Figure 1 shows the overview of the dropping device. For details and measurements, ask for technical engi

35、neering pictures1). Key 1 steel cone 7 support block for specimen 2 cone holder 8 framework 3 solenoid with rod 9 aluminium block (connect to cooling unit) 4 insulation brick 10 cooling unit 5 drop guide 11 counterweight 6 test specimen Figure 1 Overview of the dropping device 1) Technical engineeri

36、ng pictures are available from Finnish Institute of Occupational Health, Protection and Product Safety, Topeliuksenkatu 41 A, FIN-00320 Helsinki, Finland, Fax +358-30 474 2115. 6 EN ISO 12127-2:2007 (E) DIN EN ISO 12127-2:2008-04 4 Apparatus and materials 4.1 Heating oven, capable of reaching a temp

37、erature of at least 800 C and with inside measurements adequate for heating the steel cone, e.g. (110 140 160) mm. 4.2 Steel cylinder, comprising a normal commercial cylindrical roller for roller bearings, with the following dimensions2): Material: Steel 58-65 HRC Diameter: 6,0 mm 11 m Height: 12 mm

38、 11 m Mass: 2,6 g 20 mg A new steel cylinder is used for every single drop. The flat circular end of the cylinder shall be in contact with the specimen. 4.3 Steel cone (Figure 2), in which the steel cylinders are heated and from which they are transferred to the test specimen. The cone is machined f

39、rom heat resistant steel. A thin slot is machined through the cone for a sliding plate, which releases the cylinder to the specimen. 4.4 Cone holder (Figure 3), made from heat resistant steel and which locates the cone in position for releasing the steel cylinder. Figure 2 Steel cone Figure 3 Cone h

40、older 4.5 Support table (Figure 1), which supports the cone on the metal holder, solenoid and cooling unit. The support table is made of heat resistant and thermo negative material. 4.6 Solenoid with a rod, used to push the sliding plate inside the cone to release the cylinder (Figure 1). The soleno

41、id is located to one side of the support table so that the rod is able to push the sliding plate and release the cylinder from the cone. 2) Torrington product ZRO. 6 12* PO/M6* is an example of a suitable product available commercially (). This information is given for the convenience of users of th

42、is document and does not constitute an endorsement by ISO of this product. 7 DIN EN ISO 12127-2:2008-04 EN ISO 12127-2:2007 (E) 4.7 Drop guide (Figure 4), designed to guide the steel cylinder to the horizontally oriented test specimen. Drop guide part 1 (ceramic pipe covered with aluminium pipe) is

43、fixed to the support table. Drop guide part 2 is separate and machined from the aluminium pipe. It is surrounded by glued neoprene cover and has inside ceramic pipe with a tapered throat. Part 2 is lowered on the sample. Figure 4 Parts of drop guide and assembly 4.8 Support block for the specimen an

44、d calorimeter (Figure 5), made of a curved aluminium sheet and fitted on a plastic base element. Two blocks are needed: one without calorimeter: plain curved aluminium sheet; one with the temperature calorimeter: glass-fibre strips are glued on both sides of the calorimeter on the top of the curved

45、aluminium sheet, as shown in Figure 5. The blocks can be moved forward and backward under the drop guide (see Figure 1). 4.9 Calorimeter for measuring the temperature under the test specimen, comprising a K-type thermocouple (Figure 6) inserted into the copper disc. The dimensions of the copper disc

46、 are: purity 99,9 %; thickness 1,7 mm 0,02 mm; diameter 8 mm 0,02 mm; mass 766 mg 13 mg. 8 EN ISO 12127-2:2007 (E) DIN EN ISO 12127-2:2008-04 The calorimeter manufactured in accordance with Figure 6 is mounted to a ceramic ferrule. This assembly is mounted tightly with a thin layer of heat resistant

47、 glue3)to the hole in the curved aluminium sheet of the support block. (Figure 5). Figure 5 Support block for the specimen and calorimeter Figure 6 Calorimeter, mounting the thermocouple to the copper disc 4.10 Thermo electric cooler (Figure 7), attached to the support table to keep the temperature

48、of the dropping device at constant level. The cooling unit is adjusted to cool the dropping device and calorimeter to (20 1) C while the cylinder is heated in the oven. Figure 8 shows a block diagram of the thermo electric cooler. 3) Hottinger Baldwin Messtechnik GmbH, type X60 two component adhesiv

49、e is an example of a suitable product available commercially (http:/www.hbm.de/products/SEURLF/ASP/SFS/SUBCAT.15/CATEGORY.3/PRODID.371/MM.3,33,140/SFE/ProductDataSheet.htm). This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of this product. 9 DIN EN ISO 12127-2:2008-04 EN ISO 12127-2:2007 (E) Key 1 aluminium angle 2 insulating layer 3 cooling plate 4 Peltier element 5 fan Figure 7 Thermo electric cooler 10 EN I