BS PD CEN TR 16829-2016 Fire and explosion prevention and protection for bucket elevators《斗式升运机的防火和防爆》.pdf

1、PD CEN/TR 16829:2016 Fire and explosion prevention and protection for bucket elevators BSI Standards Publication WB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06PD CEN/TR 16829:2016 PUBLISHED DOCUMENT National foreword This Published Document is the UK implementation of CEN/TR 16829:2016. Ea

2、rlier guidance on protection of bucket elevators from internal dust explosions was based on large scale experimental work carried out by the Health and Safety Laboratory and was published in the I Chem E guide to dust explosions. Since then many bucket elevators have been fitted with explosion prote

3、ction based on this advice, as a result the number of explosions in bucket elevators has reduced in recent years. This seems likely to be the consequence of improved controls over ignition sources in the elevators, as described in this TR. The UK committee cannot see a justification for retrofitting

4、 older elevators built to I Chem E guidelines in order to meet the venting advice in this TR. Moreover, provided the details of an installation closely follow that used in the HSL research, a bucket elevator fitted with vents according to the I Chem E guide, and other features as described in this T

5、R, then it should meet the requirements of DSEAR, and the reasonably practical precautions required by the HSW Act. The Approved Code of Practice and further guidance on the Regulations can be found in HSE publication L138. The UK participation in its preparation was entrusted to Technical Committee

6、 EXL/23/1, Flame arresters. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution

7、 2016. Published by BSI Standards Limited 2016 ISBN 978 0 580 89235 6 ICS 13.220.40; 13.230; 53.040.10 Compliance with a British Standard cannot confer immunity from legal obligations. This Published Document was published under the authority of the Standards Policy and Strategy Committee on 3 1 Oct

8、ober 2016. Amendments/corrigenda issued since publication Date Text affectedPD CEN/TR 16829:2016TECHNICAL REPORT RAPPORT TECHNIQUE TECHNISCHER BERICHT CEN/TR 16829 August 2016 ICS 13.220.40; 13.230; 53.040.10 English Version Fire and explosion prevention and protection for bucket elevators Prvention

9、 et protection contre lincendie et lexplosion des lvateurs godets Brand- und Explosionsschutz fr Becherwerke This Technical Report was approved by CEN on 13 July 2015. It has been drawn up by the Technical Committee CEN/TC 305. CEN members are the national standards bodies of Austria, Belgium, Bulga

10、ria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Tur

11、key and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.

12、Ref. No. CEN/TR 16829:2016 EPD CEN/TR 16829:2016 CEN/TR 16829:2016 (E) 2 Contents Page European foreword . 3 1 Scope 4 2 Normative references 4 3 Terms and definitions . 5 4 Bucket elevators 6 4.1 General 6 4.2 Bucket elevator types 6 5 Fire and explosion hazards 6 5.1 General 6 5.2 Explosion hazard

13、s . 7 5.2.1 Presence of explosive atmospheres . 7 5.2.2 Presence of potential ignition sources 8 5.2.3 Effect of ignition: smouldering product, fire, explosion, propagation of explosion 10 5.2.4 Risk assessment 10 5.3 Fire hazards 10 6 Fire and explosion prevention and protection of bucket elevators

14、 11 6.1 General . 11 6.2 Fire prevention and protection . 12 6.2.1 Fire prevention . 12 6.2.2 Fire protection 12 6.3 Explosion prevention and protection . 13 6.3.1 Prevention of explosive atmospheres 13 6.3.2 Prevention of ignition sources 14 6.3.3 Protective measures . 19 7 Information for use . 19

15、 7.1 Markings 21 Annex A (informative) Examples/types of bucket elevators . 22 Annex B (informative) Guidance on explosion venting . 28 Annex C (informative) Guidance on explosion suppression 33 Annex D (informative) Example of an ignition hazard assessment 36 Annex E (informative) Example of a name

16、plate . 61 Annex F (informative) Guidance for assessing the probability of generating explosive atmospheres 62 Bibliography . 63 PD CEN/TR 16829:2016 CEN/TR 16829:2016 (E) 3 European foreword This document (CEN/TR 16829:2016) has been prepared by Technical Committee CEN/TC 305 “Potentially explosive

17、 atmospheres Explosion prevention and protection”, the secretariat of which is held by DIN. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent ri

18、ghts. PD CEN/TR 16829:2016 CEN/TR 16829:2016 (E) 2PD CEN/TR 16829:2016 CEN/TR 16829:2016 (E) 2 Contents Page European foreword . 3 1 Scope 4 2 Normative references 4 3 Terms and definitions . 5 4 Bucket elevators 6 4.1 General 6 4.2 Bucket elevator types 6 5 Fire and explosion hazards 6 5.1 General

19、6 5.2 Explosion hazards . 7 5.2.1 Presence of explosive atmospheres . 7 5.2.2 Presence of potential ignition sources 8 5.2.3 Effect of ignition: smouldering product, fire, explosion, propagation of explosion 10 5.2.4 Risk assessment 10 5.3 Fire hazards 10 6 Fire and explosion prevention and protecti

20、on of bucket elevators 11 6.1 General . 11 6.2 Fire prevention and protection . 12 6.2.1 Fire prevention . 12 6.2.2 Fire protection 12 6.3 Explosion prevention and protection . 13 6.3.1 Prevention of explosive atmospheres 13 6.3.2 Prevention of ignition sources 14 6.3.3 Protective measures . 19 7 In

21、formation for use . 19 7.1 Markings 21 Annex A (informative) Examples/types of bucket elevators . 22 Annex B (informative) Guidance on explosion venting . 28 Annex C (informative) Guidance on explosion suppression 33 Annex D (informative) Example of an ignition hazard assessment 36 Annex E (informat

22、ive) Example of a nameplate . 61 Annex F (informative) Guidance for assessing the probability of generating explosive atmospheres 62 Bibliography . 63 PD CEN/TR 16829:2016 CEN/TR 16829:2016 (E) 3 European foreword This document (CEN/TR 16829:2016) has been prepared by Technical Committee CEN/TC 305

23、“Potentially explosive atmospheres Explosion prevention and protection”, the secretariat of which is held by DIN. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any

24、 or all such patent rights. PD CEN/TR 16829:2016 CEN/TR 16829:2016 (E) 3PD CEN/TR 16829:2016 CEN/TR 16829:2016 (E) 4 1 Scope This European Technical Report applies to bucket elevators that may handle combustible products capable of producing potentially explosive atmospheres of dust or powder inside

25、 the bucket elevator during its operation. The precautions to control ignition sources will also be relevant where the product in the bucket elevator creates a fire risk but not an explosion risk. For the purposes of this report, a bucket elevator is defined as an item of bulk material handling equi

26、pment that carries material in powder form or as coarse products such as whole grain, wood chips or flakes, in a vertical direction by means of a continuous movement of open containers. This Technical Report specifies the principles of and guidance for fire and explosion prevention and explosion pro

27、tection for bucket elevators. Prevention is based on the avoidance of effective ignition sources, either by the elimination of ignition sources or the detection of ignition sources. Explosion protection is based on the application of explosion venting, explosion suppression or explosion containment

28、and explosion isolation rules specifically adapted for bucket elevators. These specific rules may be based on agreed test methods. This European Technical Report does not apply to products that do not require atmospheric oxygen for combustion. 2 Normative references The following documents, in whole

29、 or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1127-1:2011, Explosive atmospheres Ex

30、plosion prevention and protection Part 1: Basic concepts and methodology EN 13237, Potentially explosive atmospheres Terms and definitions for equipment and protective systems intended for use in potentially explosive atmospheres EN 13463-1, Non-electrical equipment for use in potentially explosive

31、atmospheres Part 1: Basic method and requirements EN 13463-5, Non-electrical equipment intended for use in potentially explosive atmospheres Part 5: Protection by constructional safety c EN 13463-6, Non-electrical equipment for use in potentially explosive atmospheres Part 6: Protection by control o

32、f ignition source b EN 14373, Explosion suppression systems EN 14460, Explosion resistant equipment EN 14797, Explosion venting devices EN 14491, Dust explosion venting protective systems EN 15089, Explosion isolation systems EN 60079-10-2, Explosive atmospheres Part 10-2: Classification of areas Co

33、mbustible dust atmospheres PD CEN/TR 16829:2016 CEN/TR 16829:2016 (E) 5 EN ISO 12100, Safety of machinery General principles for design Risk assessment and risk reduction (ISO 12100) ISO 281, Rolling bearings Dynamic load ratings and rating life IEC/TS 60079-32-1, Explosive atmospheres Part 32-1: El

34、ectrostatic hazards, Guidance VDI 2263-1, Dust fires and dust explosions; hazards, assessment, protective measures; test methods for the determination of the safety characteristic of dusts 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13237, EN 1508

35、9 and the following apply. Note 1 to entry: The zones for the classification of hazardous areas are defined in Directive 1999/92/EC. 3.1 volume 3.1.1 bucket elevator leg volume internal volume of pipe section connecting head to the boot 3.1.2 bucket elevator head volume internal volume above the leg

36、 connection, including outlet section and excluding the volume of the pulley Note 1 to entry: Attached chutes are not included. 3.1.3 bucket elevator boot volume internal volume below the leg connection, including inlet section and excluding the volume of the pulley 3.2 vent spacing distance between

37、 vents measured from centre to centre 3.3 bucket spacing distance between buckets measured from centre to centre 3.4 combustible dust finely divided solid particles, 500 m or less in nominal size, which may be suspended in air, may settle out of the atmosphere under their own weight, which can burn

38、or glow in air, and may form explosive mixtures with air at atmospheric pressure and normal temperatures PD CEN/TR 16829:2016 CEN/TR 16829:2016 (E) 4PD CEN/TR 16829:2016 CEN/TR 16829:2016 (E) 4 1 Scope This European Technical Report applies to bucket elevators that may handle combustible products ca

39、pable of producing potentially explosive atmospheres of dust or powder inside the bucket elevator during its operation. The precautions to control ignition sources will also be relevant where the product in the bucket elevator creates a fire risk but not an explosion risk. For the purposes of this r

40、eport, a bucket elevator is defined as an item of bulk material handling equipment that carries material in powder form or as coarse products such as whole grain, wood chips or flakes, in a vertical direction by means of a continuous movement of open containers. This Technical Report specifies the p

41、rinciples of and guidance for fire and explosion prevention and explosion protection for bucket elevators. Prevention is based on the avoidance of effective ignition sources, either by the elimination of ignition sources or the detection of ignition sources. Explosion protection is based on the appl

42、ication of explosion venting, explosion suppression or explosion containment and explosion isolation rules specifically adapted for bucket elevators. These specific rules may be based on agreed test methods. This European Technical Report does not apply to products that do not require atmospheric ox

43、ygen for combustion. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document

44、 (including any amendments) applies. EN 1127-1:2011, Explosive atmospheres Explosion prevention and protection Part 1: Basic concepts and methodology EN 13237, Potentially explosive atmospheres Terms and definitions for equipment and protective systems intended for use in potentially explosive atmos

45、pheres EN 13463-1, Non-electrical equipment for use in potentially explosive atmospheres Part 1: Basic method and requirements EN 13463-5, Non-electrical equipment intended for use in potentially explosive atmospheres Part 5: Protection by constructional safety c EN 13463-6, Non-electrical equipment

46、 for use in potentially explosive atmospheres Part 6: Protection by control of ignition source b EN 14373, Explosion suppression systems EN 14460, Explosion resistant equipment EN 14797, Explosion venting devices EN 14491, Dust explosion venting protective systems EN 15089, Explosion isolation syste

47、ms EN 60079-10-2, Explosive atmospheres Part 10-2: Classification of areas Combustible dust atmospheres PD CEN/TR 16829:2016 CEN/TR 16829:2016 (E) 5 EN ISO 12100, Safety of machinery General principles for design Risk assessment and risk reduction (ISO 12100) ISO 281, Rolling bearings Dynamic load r

48、atings and rating life IEC/TS 60079-32-1, Explosive atmospheres Part 32-1: Electrostatic hazards, Guidance VDI 2263-1, Dust fires and dust explosions; hazards, assessment, protective measures; test methods for the determination of the safety characteristic of dusts 3 Terms and definitions For the pu

49、rposes of this document, the terms and definitions given in EN 13237, EN 15089 and the following apply. Note 1 to entry: The zones for the classification of hazardous areas are defined in Directive 1999/92/EC. 3.1 volume 3.1.1 bucket elevator leg volume internal volume of pipe section connecting head to the boot 3.1.2 bucket elevator head volume internal volume above the leg connection, including outlet section and excluding the volume of the pulley Note 1 to entry: Attached chutes are not included. 3.1.3 bucket e