NFPA 51-2013 Standard for the Design and Installation of Oxygen-Fuel Gas Systems for Welding Cutting and Allied Processes (Effective Date 06 18 2012).pdf

1、NFPA 51 Standard for the Design and Installation of OxygenFuel Gas Systems for Welding, Cutting, and Allied Processes 2013 Edition NFPA, 1 Batterymarch Park, Quincy, MA 02169-7471 An International Codes and Standards Organization Become a Member Subscribe to the Register for Seminars, Webinars, and

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25、 visit the NFPA website at www.nfpa.org. 12/11Copyright 2012 National Fire Protection Association . All Rights Reserved. NFPA 51 Standardforthe DesignandInstallationofOxygenFuelGasSystemsforWelding, Cutting,andAlliedProcesses 2013Edition This edition of NFPA 51,StandardfortheDesignandInstallationofO

26、xygenFuelGasSystemsfor Welding, Cutting, andAllied Processes, was prepared by the Technical Committee on Industrial and Medical Gases. It was issued by the Standards Council on May 29, 2012, with an effective date of June 18, 2012, and supersedes all previous editions. This edition of NFPA 51 was ap

27、proved as an American National Standard on June 18, 2012. OriginandDevelopmentofNFPA51 NFPA standards for the construction, installation, and use of acetylene gas machines and for the storage of calcium carbide date from 1900. In 1925, the first edition of NFPA 51 was adopted. Subsequent editions of

28、 NFPA 51 were dated 1927, 1936, 1942, 1944, 1946, 1951, 1953, 1957, 1958, 1960, 1961, 1964, 1969, 1973, 1974, 1977, 1983, 1987, and 1992. In June 1966, responsibility for NFPA 51 was reassigned from the Committee on Gases and its Sectional Committee on Industrial Gases to the Committee on Industrial

29、 and Medical Gases. The 1997 edition was revised editorially to make the standard easier to use, understand, and enforce. The 2002 edition of NFPA 51 contained relatively few changes. The most significant changes were clarification of the size of small systems to which the standard would not apply a

30、nd the requirements for leak testing piping systems. In addition, the document was revised to conform to the 2002 edition of Manual of Style for NFPA Technical Committee Documents, including reordering of the chapters and adoption of SI units as primary units. The changes to the 2007 edition of NFPA

31、 51 were as follows: (1) Use of standard NFPA text for retroactivity and equivalency (2) Changes in Chapters 4 through 9 to be consistent with NFPA 55, Standard for the Storage, Use,andHandlingofCompressedGasesandCryogenicFluidsinPortableandStationaryContain- ers, Cylinders, andTanks, particularly t

32、he storage amounts set in NFPA 55 (3) Adoption of definitions of fuel gas, limited combustible, and noncombustible material that are consistent with the subject matter of the document (4) Elimination of several terms that could not be enforced The 2013 edition was reorganized to coordinate maximum a

33、llowable quantities (MAQs) and building controls as used in NFPA 55,CompressedGasesandCryogenicFluidsCode; NFPA 1,FireCode; NFPA5000 , Building Construction and Safety Code ; and NFPA 400, Hazardous Materials Code; with updates to Chapter 4 and the definitions in Chapter 3. Allowable pressures and o

34、ther require- ments for oxygen manifolds were updated and clarified. New protocols for Mobile Acetylene Trailer Systems (MATS) were added to coordinate with NFPA 51A, Standard forAcetylene Cylinder Charging Plants. 511 NFPA and National Fire Protection Association are registered trademarks of the Na

35、tional Fire Protection Association, Quincy, Massachusetts 02169.TechnicalCommitteeonIndustrialandMedicalGases MichaelW.St.Clair, Chair Ostrander, OH U Rep. NFPA Industrial Fire Protection Section WilliamJ.Satterfield,III, Secretary Hydrogen Safety, LLC/Rode the installation of associated storage, pi

36、ping, and distribution equipment; and operating practices. The Committee also has a technical responsibility for contributions in the same areas for medical gases and clean rooms. 512 DESIGN AND INSTALLATION OF OXYGENFUEL GAS SYSTEMS FOR WELDING, CUTTING, AND ALLIED PROCESSES 2013 EditionContents Ch

37、apter1 Administration . 514 1.1 Scope 514 1.2 Purpose 514 1.3 Retroactivity 514 1.4 Equivalency . 514 1.5 Fuel Gases in the Liquid Phase 514 1.6 Operations and Fire Prevention Practices . 515 1.7 MaterialOxygen Compatibility . 515 1.8 Cylinders and Containers . 515 1.9 Units and Formulas. 515 Chapte

38、r2 ReferencedPublications 515 2.1 General 515 2.2 NFPA Publications 515 2.3 Other Publications 515 2.4 References for Extracts in Mandatory Sections 515 Chapter3 Definitions 515 3.1 General 515 3.2 NFPA Official Definitions . 515 3.3 General Definitions . 516 Chapter4 CylindersandContainers . 517 4.

39、1 Fabrication and Marking 517 4.2 Cylinder Storage and Use General 517 4.3 Fuel Gas Cylinder Storage 517 4.4 Oxygen Cylinder Storage . 518 4.5 Gas Cabinets . 519 4.6 Exhausted Enclosures 519 4.7 Gas Rooms 519 Chapter5 ManifoldingofCylinders 519 5.1 Fuel Gas Manifolds . 519 5.2 High-Pressure Oxygen M

40、anifolds . 519 5.3 Low-Pressure Oxygen Manifolds 5110 5.4 Portable Outlet Headers 5110 Chapter6 PipingSystems . 5110 6.1 Materials and Design . 5110 6.2 Piping Joints 5111 6.3 Installation 5111 6.4 Cleaning . 5111 6.5 Testing . 5111 6.6 Painting and Signs 5111 Chapter7 ProtectiveEquipment,Hose,and R

41、egulators 5111 7.1 General 5111 7.2 Pressure Relief for Piping Systems 5111 7.3 Piping Protective Equipment 5112 7.4 Station Outlet Protective Equipment 5113 7.5 Hose and Hose Connections . 5113 7.6 Pressure-Reducing Regulators . 5113 Chapter8 AcetyleneGenerators 5113 8.1 Listing and Marking 5113 8.

42、2 Rating and Pressure Limitations 5113 8.3 Location . 5113 8.4 Stationary Acetylene Generators (Automatic and Nonautomatic) . 5113 8.5 Outside Generator Houses and Inside Generator Rooms for Stationary Acetylene Generators 5114 Chapter9 CalciumCarbideStorage 5115 9.1 Packaging . 5115 9.2 Storage in

43、Buildings 5115 9.3 Storage Outside Buildings 5115 Chapter10 MobileAcetyleneTrailerSystems 5115 10.1 General Provisions 5115 10.2 Discharge Stations at Consumer Sites 5115 10.3 Indoor Discharge Stations 5115 10.4 Instructions . 5116 10.5 Fire Protection . 5116 AnnexA ExplanatoryMaterial . 5117 AnnexB

44、 InformationalReference 5119 Index . 5120 513 CONTENTS 2013 EditionNFPA51 Standardforthe DesignandInstallationofOxygenFuelGas SystemsforWelding,Cutting,andAllied Processes 2013Edition IMPORTANT NOTE: This NFPA document is made available for use subject to important notices and legal disclaimers. The

45、se notices anddisclaimersappearinallpublicationscontainingthisdocument and may be found under the heading “Important Notices and Dis- claimers Concerning NFPADocuments.” They can also be obtained on request from NFPAor viewed at www.nfpa.org/disclaimers. NOTICE: An asterisk (*) following the number

46、or letter designating a paragraph indicates that explanatory material on the paragraph can be found in Annex A. Changes other than editorial are indicated by a vertical rule beside the paragraph, table, or figure in which the change occurred. These rules are included as an aid to the user in identif

47、ying changes from the previous edition. Where one or more complete paragraphs have been deleted, the de- letion is indicated by a bullet () between the paragraphs that remain. A reference in brackets following a section or paragraph indicates material that has been extracted from another NFPA docume

48、nt. As an aid to the user, the complete title and edition of the source documents for extracts in mandatory sections of the document are given in Chapter 2 and those for extracts in informational sections are given in Annex B. Extracted text may be edited for consistency and style and may include th

49、e revision of internal paragraph references and other refer- ences as appropriate. Requests for interpretations or revisions of extracted text shall be sent to the technical committee re- sponsible for the source document. Information on referenced publications can be found in Chapter 2 and Annex B. Chapter1 Administration 1.1 Scope. 1.1.1 This standard applies to the following: (1) Design and installation of oxygenfuel gas welding and cutting systems and allied pro