NFPA 51A-2012 Standard for Acetylene Cylinder Charging Plants (Effective Date 08 31 2011).pdf

1、NFPA51A Standard for Acetylene Cylinder Charging Plants 2012 Edition NFPA, 1 Batterymarch Park, Quincy, MA 02169-7471 An International Codes and Standards Organization Become a MemberSubscribeto theRegister forSeminars, Webinars, and Online CoursesVisit theNFPA CatalogNOTICE AND DISCLAIMER OF LIABIL

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25、 Fire Protection Association. All Rights Reserved.NFPA51AStandard forAcetylene Cylinder Charging Plants2012 EditionThis edition of NFPA 51A, Standard for Acetylene Cylinder Charging Plants, was prepared bythe Technical Committee on Industrial and Medical Gases, and acted on by NFPA at its JuneAssoci

26、ation Technical Meeting held June 1215, 2011, in Boston, MA. It was issued by theStandards Council on August 11, 2011, with an effective date of August 31, 2011, and super-sedes all previous editions.This edition of NFPA 51A was approved as an American National Standard on August 31, 2011.Origin and

27、 Development of NFPA 51AAlthough acetylene cylinder charging plants have been built and operated for severaldecades, only a limited number of concerns were involved at first, since the plants possessed ahigh degree of design and operating capability. Fire experience was good, and there was noneed fo

28、r national standard guidance.In the 1960s, a number of other firms entered the industry, and the need for a nationalstandard became evident. Work on this standard was initiated, and its subsequent promulga-tion was materially assisted by a committee of the Compressed Gas Association, Inc., whichsubm

29、itted a text to the NFPA Technical Committee on Industrial and Medical Gases.NFPA 51A was adopted as a tentative standard in 1970. Amended editions were adopted in1971, 1973, 1974, 1979, 1984, 1989, and 1996.The 2001 edition contained editorial changes to bring the standard into compliance withthe 2

30、000 edition of the Manual of Style for NFPATechnical Committee Documents.The 2006 edition of NFPA 51A was completely revised to make it conform with the 2004edition of the Manual of Style for NFPATechnical Committee Documents. The order of Chapters 2through 12 was changed. In addition, several defin

31、itions were changed to make them consis-tent with other NFPA documents. Other changes were made throughout the document toincrease clarity of the text and ease of use.The 2012 edition includes new requirements for mobile acetylene trailer systems (MATS)filling and discharging stations and fire prote

32、ction for such systems. Fires involving MATS atuser sites during unloading operations were the subject of a special investigation report (SIR09/01, PB2009-917002) by the National Transportation Safety Board (NTSB). The TechnicalCommittee on Industrial and Medical Gases considered the NTSB findings a

33、nd developedrequirements for MATS location, equipment, posted warnings, and fire protection. In addi-tion, specific separation distances between high pressure acetylene drain lines and exposureshave been added to Chapter 8.51A1NFPA and National Fire Protection Association are registered trademarks o

34、f the National Fire Protection Association, Quincy, Massachusetts 02169.Technical Committee on Industrial and Medical GasesMichael W. St. Clair, ChairOstrander, OH URep. NFPA Industrial Fire Protection SectionWilliam J. Satterfield, III, SecretaryHydrogen Safety, LLC/Rode the installation of associa

35、ted storage, piping, and distribution equipment; and operating practices.The Committee also has a technical responsibility for contributions in the same areas for medical gases andclean rooms.51A2 ACETYLENE CYLINDER CHARGING PLANTS2012 EditionContentsChapter 1 Administration . 51A41.1 Scope 51A41.2

36、Purpose 51A41.3 Application . 51A41.4 Retroactivity 51A41.5 Equivalency . 51A4Chapter 2 Referenced Publications 51A42.1 General 51A42.2 NFPA Publications 51A42.3 Other Publications . 51A42.4 References for Extracts in MandatorySections . 51A5Chapter 3 Definitions 51A53.1 General 51A53.2 NFPA Officia

37、l Definitions . 51A53.3 General Definitions 51A5Chapter 4 Plant Location, Arrangement,Construction, and Utilities 51A64.1 Location . 51A64.2 Arrangement . 51A64.3 Construction . 51A64.4 Ventilation 51A64.5 Gas Detection System 51A74.6 Heating 51A74.7 Electrical Equipment 51A7Chapter 5 Calcium Carbid

38、e 51A75.1 Drums and Containers 51A75.2 Storage Areas 51A75.3 Handling 51A8Chapter 6 Acetylene Generators and CalciumCarbide Residue . 51A86.1 Design . 51A86.2 Installation . 51A86.3 Venting of Generator 51A86.4 Operating Instructions 51A86.5 Calcium Carbide Residue Disposal . 51A8Chapter 7 Acetylene

39、 Gasholders and Low andMedium Pressure Purifiers andDriers 51A97.1 Location of Gasholder . 51A97.2 Installation of Gasholder 51A97.3 Low and Medium Pressure Purifiers andDriers. . 51A97.4 Drain Lines from Low and MediumPressure Acetylene Systems . 51A9Chapter 8 Acetylene Compressors and HighPressure

40、 Driers 51A98.1 Installation . 51A98.2 Compressor Design . 51A10Chapter 9 Acetylene Piping 51A109.1 General 51A109.2 Piping for Pressure Not Exceeding aGauge Pressure of 15 psi (103 kPa) 51A109.3 Piping for Pressure Exceeding a GaugePressure of 15 psi (103 kPa) 51A109.4 Cylinder Charging Leads 51A10

41、Chapter 10 Acetylene Cylinder ChargingManifolds, Solvent Equipment,and Mobile Acetylene TrailerSystems . 51A1110.1 General. . 51A1110.2 Solvent Equipment . 51A1110.3 Charging Procedures . 51A1110.4 Cylinder Cooling Systems . 51A1110.5 Cylinder Storage 51A1110.6 Mobile Acetylene Trailer Systems(MATS)

42、. . 51A11Chapter 11 Fire Prevention and Protection . 51A1211.1 Fire Prevention 51A1211.2 Fire Protection 51A12Chapter 12 General Provisions 51A1212.1 Alloys 51A1212.2 Equipment and Piping 51A1212.3 Powered Industrial Trucks 51A12Annex A Explanatory Material . 51A12Annex B Informational References 51

43、A16Index . 51A1851A3CONTENTS2012 EditionNFPA 51AStandard forAcetylene Cylinder Charging Plants2012 EditionIMPORTANT NOTE: This NFPA document is made available foruse subject to important notices and legal disclaimers. These noticesand disclaimers appear in all publications containing this documentan

44、d may be found under the heading “Important Notices and Dis-claimers Concerning NFPA Documents.” They can also be obtainedon request from NFPA or viewed at www.nfpa.org/disclaimers.NOTICE: An asterisk (*) following the number or letterdesignating a paragraph indicates that explanatory materialon the

45、 paragraph can be found in Annex A.Changes other than editorial are indicated by a verticalrule beside the paragraph, table, or figure in which thechange occurred. These rules are included as an aid to theuser in identifying changes from the previous edition. Whereone or more complete paragraphs hav

46、e been deleted, the de-letion is indicated by a bullet ( ) between the paragraphs thatremain.A reference in brackets following a section or paragraphindicates material that has been extracted from another NFPAdocument. As an aid to the user, the complete title and editionof the source documents for

47、extracts in mandatory sections ofthe document are given in Chapter 2 and those for extracts ininformational sections are given in Annex B. Extracted textmay be edited for consistency and style and may include therevision of internal paragraph references and other refer-ences as appropriate. Requests

48、 for interpretations or revisionsof extracted text shall be sent to the technical committee re-sponsible for the source document.Information on referenced publications can be found inChapter 2 and Annex B.Chapter 1 Administration1.1 Scope. This standard shall apply to plants that are engagedin the g

49、eneration and compression of acetylene and in the charg-ing of acetylene cylinders, either as their sole operation or inconjunction with facilities for charging other compressed gas cyl-inders.1.2 Purpose. This standard shall provide safety requirementsfor the design, construction, and installation of acetylene cylin-der charging plants in order to provide safeguards for the protec-tion of the plant, its employees, and the public.1.3* Application. This