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    NFPA 86-2007 Standard for Ovens and Furnaces

  • 上傳人: l****
  • 文檔編號:1713970
  • 上傳時間:2017-04-25
  • 文檔格式:PDF
  • 文檔頁數:146
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    1、NFPA Technical Committee Document Proposal Form NOTE: All Proposals must be received by 5:00 p.m. EST/EDST on the published Proposal Closing Date. For further information on the standards-making proc NFPA Technical Committee Document Proposal Form NOTE: All Proposals must be received by 5:00 p.m. ES。

    2、T/EDST on the published Proposal Closing Date. For further information on the standards-making proSequence of Events Leading to Issuance of an NFPA Committee DocumentStep 1: Call for Proposals Proposed new Document or new edition of an existing Document is entered into one of two yearly revision Ven。

    3、t limiter (definition) . 3.3.75 Water heating systems .see Fluid-heated systems86140 OVENS AND FURNACESCopyright National Fire PrLocation . 12.9.1, 12.9.2.2 Maintenance checklist . Annex H86139INDEXCopyright National Fire Protection Association PrMultiple fuel systems . 8.12 Carrier gas special atmo。

    4、spheres .see Carrier gas special86138 OVENS AND FURNACESCopyright National Fire ProtectProven ventilation (definition) . 3.3.52 Direct spark ignition systems . 8.4.2.486137INDEXCopyright National Fire Protection AssociOpen liquid tanks .see Tanks Piping . 6.1.186136 OVENS AND FURNACESCopyright Natio。

    5、nal Fi-L-Maintenance . 7.5.9, 7.5.10, 12.1.3.5(6), 12.3.4.1(8),86135INDEXCopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Contract MgmtFuel gasfired units .see Fuel gasfired units Checklists . Annex B, Annex C, Annex G, Annex H86134 OVENS AND FUR。

    6、NACESCopyright National Fire Protection AssFlame rods (definition) . 3.3.20, A.3.3.20 Fume incinerators . 9.2.1, Chap. 9, 10.1.1.9,86133INDEXCopyright National Fire Protection AssocFluid-heated systems . 8.19, A.8.19 Electrical equipment .see also Fans; Motors; Wiring86132 OVENS AND FURNACESCopyrigh。

    7、t National Fire ProtectioType VI furnaces . 12.5.2.1.2 Emergency procedures . 12.5.386131INDEXCopyright National Fire Protection Association PrIndexin thereproduced(definition) . 3.3.22.2Atomization, oil . 6.3.7, 8.10, A.6.3.7.1Self-piloted .CGA G-4.4, Industrial Practices for Gaseous Oxygen Transmi。

    8、s-sion and Distribution Piping Systems, 2003.CGA G-5, Hydrogen, 2005.CGA G-6, Carbon Dioxide, 2003.CGA G-6.1, Standard forLow Pressure Carbon Annex L Design Standard ReferencesNFPA 91, Standard for Exhaust Systems for Air Conveying of86128 OVENS AND FURNACESCopyright National Fire Protection Associa。

    9、tion Provided by IHS under license with N86127ANNEX KCopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Contract Mgmt Command/5935922100 Not for Resale, 09/27/2006 03:00:09 MDTNo reproduct86126 OVENS AND FURNACESCopyright National Fire Protection A。

    10、ssociation Provided by IHS under license with NFPALicensee=Defense Contract Mgmt Command/5935922100 Not for Resale, 09/27/2006 03:00:09 MDTTable J.1(f) Continuedof g118.073.068.535.036.024.1314.6174350.56.160.317.385.3(25 to 100)Selenium Se 4.79 217 685 16.5 0.081 0.0007 to 3.7 12 (0)86125ANNEX KCop。

    11、yright National Fire Protection ATable J.1(e) Conversion Factors for Units of Measurement Used in Vacuum Engineering86124 OVENS AND FURNACESCopyright National Fire Protection Association Provided by IHS under license with NFPALicensTable J.1(a) Conversion of Gas Flows ft3 min1atmcm3h1MicronLs12120 4。

    12、738 103micron ft3 min14.719 1041 2.236 0.47193 1 4UnitTorr(mm Hg)Micron() Pa atmMicrobar(b)Millibar(mb)Bar(b) inTest set-up schematicAdmittancetubeControl valveBleed valveForeline gaugeTest domeIonizationgaugeO-ring sealedflangeManometer flowmeter20001950190018501800175017001650160015501500363236003。

    13、500340033003Helical-lobe rotaryTwo stageSingle stageMultistageSingle stageSingle stageSingle stageSingle stageSingle stageTwo stageTwo stageSingle stageSingle stageTwo stageLiquid piston rotaryCentrifugalTwo-impe(b) Review power instrumentation and trim or zone con-trol settings.(c) Check instrument。

    14、ation for “on conditions,” chart pa-per, and active operation.(d) Check oil level in mechanical pumps and diffusprovided by the manufacturer of each control component elasticity. The main front and rear door, or bottom head, where86119ANNEX HCopyright National Fire Protection Association Provided by。

    15、 IHS under (5) Perform lubrication in accordance with manufacturers vided in G.5.2 through G.5.5. An adequate supply of spare86118 OVENS AND FURNACESCopyright National Fire Protection Association Provided by I(3) When calculating the LEL value and oven temperature operation. Complete standards paral。

    16、leling those for other ex-86117ANNEX GCopyright National Fire Protection Association Provided by IHS under l(1) The gas sample system that delivers the oven atmosphere Other parts of the analyzer logic system include flowmeters86116 OVENS AND FURNACESCopyright National Fire Protection Association Pr。

    17、ovided (10) Test the main fuel manual valves for operation and tight- were determined in a specially designed, electrically heated,86115ANNEX ECopyright National Fire Protection Association Provided by IHS B.4 Periodic Checklist. The following maintenance checklistAnnex C Example of Class A or Class。

    18、 B Furnace86114 OVENS AND FURNACESCopyright National Fire Protection Association Provided by IHS under libe of electrically nonconductive material, and the power feed- The type of sprinklers and arrangement should be appro-86113ANNEX BCopyright National Fire Protection Association Provided by IHS un。

    19、der A.13.2.4.3(B) Maximum working pressure should include al- A.13.4.1 Locations for tanks and cylinders containing flam-86112 OVENS AND FURNACESCopyright National Fire Protection Association Provided bymore easily used instruments. The gauge is limited to intermit- by a discharge of high voltage. E。

    20、lectrons from the cathode86111ANNEX ACopyright National Fire Protection Association Provided by IHS unEffluent lineEffluent linesHeating chamberay tainSalt levQuench chute86110 OVENS AND FURNACESCopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Co。

    21、na quantitative analysis is performed, the water content in ment. Above 212F (100C), the heated oil turns water toThermal elementfor temper86109ANNEX ACopyright National Fire Protection Association is not likely to be a problem, provided the diluent flow rate is Overflow drain86108 OVENS AND FURNACE。

    22、SCopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Drelied on to perform without resorting to repetitive gas analysesEffluent outlet86107ANNEX ACopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense ContA.12。

    23、.4.2.4.1(B) See FigureA.12.4.2.4.1(B). A.12.4.2.7.1(B)(8) See A.7.7.86106 OVENS AND FURNACESCopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense demand for all connected equipment. Winter temperature ex- A.12.1.8.3 Inadequate dissociation results in 。

    24、lessened atmo-86105ANNEX ACopyright National Fire Protection Association Provided by IHS underA.10.2.11 See Table A.10.2.10.1(5). When the water is removed and the cuprous acetylide is dried86104 OVENS AND FURNACESCopyright National Fire Protection Association Provided by IHS under license wiTable A。

    25、.10.2.10.1(5) ContinuedFlammability Limits vol. % in AirOxygen Limit vol. % Above WhichDeflagration Can Take Place86103ANNEX ACopyright National Fire Protection Association Provided by IHSTable A.10.2.10.1(5) Continued86102 OVENS AND FURNACESCopyright National Fire Protection Association Provided by。

    26、 IHS under license with NFPALicensee=Defense Contract Mgmt Command/5935922100 Not for RA.10.2.6.6 A flow-limiting device such as a critical flow-2,3-Dimethylpentane 1.1 6.7 NA NA 1,4,5,6n-Heptane 1 6.7 11.5 14.5 1,3,5,6Solvent recovery system86101ANNEX ACopyright National Fire ProtectiCalculated ven。

    27、tilation volume is as follows:86100 OVENS AND FURNACESCopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Contract Mgmt Command/593592Safety ventilation required for constituents released in3 ir8699ANNEX ACopyright National Fire Protection Associati。

    28、on Provided by IHS under license with NFPALicensee=Defense Contract Mgmt Command/5is barely explosive. Refer to Table A.10.1.6.2(A)(a) and Table)volume air F + 460 Ft8698 OVENS AND FURNACESCopyright National Fire Protection Association Provided by IHS under license with NFPALiceTheoretical Determina。

    29、tion of Required Ventilation. Prob- AnotherMethod of Computation. For this example, xylene is to8697ANNEX ACopyright National Fire Protection Association Provided by IHS under liTable A.10.1.6.2(A)(b) ContinuedSpecificGravityWater=1VaporDensityAir=1BoilingPointCkg perLscmVaporper LscmVaporper kgscmA。

    30、ir atLELper LMethyl 74 10 454 3.1 16.0 0.93 2.8 60 0.928 0.277 0.298 8.6686Table A.10.1.6.2(A)(b) Continued8695ANNEX ACopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Contract Mgmt Command/5935922100 Not for Resale, 09/2Table A.10.1.6.2(A)(a) Con。

    31、tinued8694 OVENS AND FURNACESCopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Contract Mgmt Command/5935922100 Not for Table A.10.1.6.2(A)(a) Continued8693ANNEX ACopyright National Fire Protection Association Provided by IHS under license with NF。

    32、PALicensee=Defense Contract Mgmt Command/5935922100 Not for Resale, 09/2(2) The temperature reading of air in oven at exhaust site measured directly, it is not necessary to perform the precedingSolventNameMolecularWeightPointFignitionF%byVolume%byVolumeWater=1DensityAirDamperDirect gas line bDamperR。

    33、ecirculating8691ANNEX ACopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Contract Mgmt Command/5935922100 Not for ReA.9.5.2 The temperature differential (T) across the catalyst need for obtaining these samples should be addressed in the8690 OVENS 。

    34、AND FURNACESCopyright National Fire Protection Association Provided A.9.2.3 Requirements for thermal ozidizers are located in or porcelain structures, pellets, or granules, etc.) the sub-8689ANNEX ACopyright National Fire Protection Association Provided by IHS under Table A.8.18.1.5 Heater RatingsDe。

    35、vices(%switches,8688 OVENS AND FURNACESCopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Contract Mgmt Command/59could evaluate the excess temperature controllers tem-Main Pilot8687ANNEX ACopyright National Fire Protection Association Provided by 。

    36、IHS under license with NFPALicensee=Defense Contract Mgmt CommanA.8.6.6 The maximum safe operating pressure can be ex- A.8.7.1.9 Back pressure can lift a valve from its seat, permit-150,000 to 400,000 Btu/hrLeaktestvalveLeaktestvalvePSafety8686 OVENS AND FURNACESTable A.7.5.9 Acceptable Leakage Rate。

    37、s/hr8685ANNEX ACopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Contract Mgmt Command/5935922100 Not for Resauxiliary power supply to safety shutoff valve No. 1 shouldTo burner 8684 OVENS AND FURNACESCopyright National Fire Protection Association。

    38、 Provided by IHS under license with NFPALicensee=Defense Contespecially hazardous. Also, because of the high oil temperatures, A.6.9.3 Airborne material can block heat exchangers and8683ANNEX ACopyright National Fire Protection Association Provided by IHS undeA.6.4.1 Oxy-fuel burners often are utili。

    39、zed in conjunction sulation that was intended for airfuel heating. Oxygen8682 OVENS AND FURNACESCopyright National Fire Protection Association Provided by IHSinstallable device, a combination listed device and vent lim- which, being a complex mixture of hydrocarbons, is rela-8681ANNEX ACopyright Nat。

    40、ional Fire Protection Association Provided by IHS under lTable A.6.2.1 Properties of Typical Flammable Gases5509328428680 OVENS AND FURNACESCopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Contract MSeasonal factors could also be relevant in cold。

    41、 climates, A.6.2.3 For additional information, refer to NFPA 54, Na-8679ANNEX ACopyright National Fire Protection Association Provided by IHS under liceA.5.3.1 For additional information regarding relief of equip-WARNING Do not deviate from these nameplate conditions.8678 OVENS AND FURNACESCopyright。

    42、 National Fire Protection Association Provided byINTERNAL DIRECT-FIRED INTERNAL DIRECT-FIRED EXTERNAL DIRECT- EXTERNAL 8677ANNEX ACopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Contract Mgmt CMANUFACTURERS JOB OR CONTRACT NO. DATE8676 OVENS AND。

    43、 FURNACESCopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Contract Mgmt Command/5935922100 NOPENINGS INTO ROOM8675ANNEX ACopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Contract Mgmt Command/。

    44、5935922100 Not for Resale, 09/27/2006 03:00:0MANUFACTURERS JOB OR CONTRACT NO. DATE8674 OVENS AND FURNACESCopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Contract Mgmt Command/5935922100 NA.3.3.37.1 Air Jet Mixer. In some cases, this type of mix。

    45、er can of NFPA 499, Recommended Practice for the Classification of Com-8673ANNEX ACopyright National Fire Protection Association Provided by IA.3.3.25.6 Class D Furnace. During inert gas quenching,8672 OVENS AND FURNACESCopyright National Fire Protection Association Provided by IHS under license wit。

    46、h NFPALicensee=Defense Contract Mgmt Communtil an arc is established between the electrode and a metal vidual such as a fire chief; fire marshal; chief of a fire preven-8671ANNEX ACopyright National Fire Protection Association Provided by IMain vacuum valveFan and motor for circulation and coolingQu。

    47、ick-disconnectflangesWater traceWork fixtureRoughing valveMechanicalvacuum pumpDiffusionpumpForeline valveWorkbasketFeed Drive motor8670 OVSaturreactorPower supplyPower terminalansf8669ANNEX ACopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Contract Mgmt Command/5935922100 Not for ReTable A.1.1.6 ContinuedFiredG. Hazards ofHeating System8668 OVENS AND FURNACESCopyright National Fire Protection Association Provided by IHS under license with NFPALicensee=Defense Contract Mgmt Comm。

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