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    NFPA 820-2008 废水处理和收集设备的防火

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    NFPA 820-2008 废水处理和收集设备的防火

    NFPA Technical Committee Document Proposal NOTE All Proposals must be received by 500 pm EST/EDST on the published Proposal Closing Date. For further ination on the standards-making proces NFPA Technical Committee Document Proposal NOTE All Proposals must be received by 500 pm EST/EDST on the published Proposal Closing Date. For further ination on the standards-making proceSequence 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 al InterpretationNFPA 820Fire Protection in Wastewater Treatment and Collection Facilities2008 EditionReference Tables 4.2, 5.2, and 6.2 F.I. 92-1Background In Tables 4.2, 5.2, and 6.2a, foVentilation ................................................... Chap. 9, D.4 Construction materials ............................... Table 4.2, 8.3.2820–65INDEXCou/D 123456 10090807Collection systems .Screening equipment .............................................. D.2.4.8 Chemical and fuel ............................................ Annex D820–64 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLLow-pressure oxidation units .......................... Table 6.2a14 Sludge ............. Table 6.2a20, Fig. A.6.2b, Fig. A.6.2c,820–63INDEXLP-Gas .........................................Ventilation rates ................................. Table 9.1.1.42, 3 Hose systems ........................................... 7.2.4.3, 10.5.12820–62 FIRE PROTECTION IN WASTEWATER TREATMENT AND In-vessel ........................................... Table 6.2a23 Definition ......................................................... 3.3.14820–61INDEXPiles .....................................Indexin thereproducedVaults .................. Table 4.226, Table 4.228, Table 4.231,Table 4.232, Table 4.236, Table 4.237, Fig.D.4Definition ..............................................NFPA 82, Standard on Incinerators and Waste and Linen Han-dling Systems and Equipment, 2004 edition.NFPA 85, Boiler and Combustion Systems Hazards Code, 2007edition.NFPA 91, Standard for Exhaust SysteD.3.3 Sparks. Sparks generated by the following can be aAnnex E List of Associations with820–58 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESsource of ignition for gases of flammabD.2.4.14 Plastic media or wood for trickling filters, rotating D.2.8 Finely Divided Solids and Dusts. Finely divided solids820–57ANNEX Dbiological contactors, bio-towers, and other fixed-film systemsaTable D.2 Gases Commonly Found in Wastewater Treatment28820–56 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESD.2.4.12 Unit processes employing oxygen-enriched atmo-spheres necessitaTable D.1.1 Chemical and Fuel Fire/Explosion HazardsExtent ofClassifiedAreaNEC-Area ElectricalClassification AllClass I, Group DMaterial ofConstructionfor Buildingsor StructuresFireProtectionMeasureC.4.7 Where combined sewers are designed to collect both D.2.4.1 Scum pits collect scum, grease, and other floating820–54 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESwastewater anB.7 Sludge Treatment. 1 The potential that flammable liquids can enter the system820–53ANNEX CB.7.1 Sludge Stabilization. Sludge is the settled solids accumu-lated and subsequently separated from thRetursludgey Aerobic oranaerobic digestion820–52 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESB.3 Primary Treatment. Primary treatment is first-stage sedi-mentation, in which settlFIRE REPORTName of company820–51ANNEX BNFPA 820 2007 National Fire Protection AssociationDate of fire Time of fire Operating facilityUnder cA.10.47 For an example of a fire report, see Figure A.10.47. dispersed with front-end loaders or similar equipment to fully820–50 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESADispersion characteristics can also affect detector place-Grade820–49ANNEX ADigestergaspipingNaturalgaspipingValveDrainDivision 1 Division 2 Unclassified3.1 m 10 ft radius Div. 1FIGURE A.6.2f U1.5 m 1.5 mVentilation C for the Control Building; Illustration of Table 6.2a, Rows 16c and 17b.820–48 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESDivision 1 Division 1.5 m5 ft 1.5 m5 ft 3.1 m 10 ftradius Div. 21.5 m 5 ftradius Div. 14.6 m5 ft 5 ft 820–47ANNEX ASupplyfanInside entirebuildingExhaust fanControl buildingGradeAnaerobic digesterSludge gaSee KeyGrade820–46 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESA.5.1 Additional ination on sources of hazards, sourcesof ignition, and mitigation measures associated with liqu1.5 m 5 ft radius0.9 m 3 ft radius 820–45ANNEX A0.9 m 3 ft radius from vent Div. 1from vent Div. 20.5 m1.5 ftGradeWet well or basinVentilation A or NNV Wet well or basinVentilation BWeA.3.3.3 Anaerobic Digestion. Process by-products include a A.3.3.71.1 Dry Well. Dry wells can contain accidental leakage of820–44 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESgas c4 Coordination with security forces or other designatedAnnex A Explanatory Material820–43ANNEX Apersonnel to admit the public fire department and to con-trol traffic and personnel5 Fire extinguish9.3.2 Dual ventilation rates for NFPA 70, Class I, Division 1 10.5 Water-Based Fire Protection Systems.820–42 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESand Division 2 areas shalTable 9.1.1.4 Minimum Ventilation RatesVentilationperper22.2galleries820–41VENTILATION9.2.8 Air shall be introduced into and exhausted from haz-ardous areas specified in 9.2.7 in a manner that will e8.3.3.5 Combustible Gas Generation and Combustion Pro-CAUTION Because of the unpredictable nature of materials820–40 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIEScesses.8.3.3.5.1 8.2.3 For the purpose of this document, materials of construc- ard to other buildings or structures shall be permitted to820–39MATERIALS OF CONSTRUCTIONtion shall be divided into the following four ba7.5 Ventilation Monitoring and Signaling Systems.Chapter 8 Materials of Construction820–38 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIES7.5.1 All continuous ventilation systems shaChapter 7 Fire and Explosion Prevention and7.2.4.1.1 In areas where there is no public water supply or820–37FIRE AND EXPLOSION PREVENTION AND PROTECTIONProtection7.1* Scope. This chapter shall establiTable 6.2b Solids Treatment Processes Sludge Drying820–36 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESRow LineLocation andFunctionFire andExplosionHazard Ventilation1Extent of820–35SOLIDS TREATMENT PROCESSESTable 6.2a ContinuedRow Line Location and FunctionFire andExplosion Hazard VentilationExtent ofClassified AreaNEC-AreaElectricalClassificationAll Class I,Group DMat820–34 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESRow Line Location and FunctionFire andExplosion Hazard VentilationExtent ofClassified AreaNEC-AreaElectricalClassificationAll CTable 6.2a Continued820–33SOLIDS TREATMENT PROCESSESRow Line Location and FunctionFire andExplosion Hazard VentilationExtent ofClassified AreaNEC-AreaElectricalClassificationAll Class I,Group DMatTable 6.2a Continued820–32 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESRow Line Location and FunctionFire andExplosion Hazard VentilationExtent ofClassified AreaNEC-AreaElectricTable 6.2a Continued820–31SOLIDS TREATMENT PROCESSESRow Line Location and FunctionFire andExplosion Hazard VentilationExtent ofClassified AreaNEC-AreaElectricalClassificationAll Class I,Group DMatTable 6.2a Continued820–30 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESRow Line Location and FunctionFire andExplosion Hazard VentilationExtent ofClassified AreaNEC-AreaElectricTable 6.2a Continued820–29SOLIDS TREATMENT PROCESSESRow Line Location and FunctionFire andExplosion Hazard VentilationExtent ofClassified AreaNEC-AreaElectricalClassificationAll Class I,Group DMat3 The following codes are used in this tableA No ventilation or ventilated at less than 12 air changes per hour.LC Limited-combustible material.LFS Low flame spread material.NANCNECNNVNR1The8Table 5.2 ContinuedExtent ofClassified Area1NEC-AreaElectricalClassificationAll Class I,Group DMaterial ofConstructionfor Buildingsor StructuresFireProtectionMeasuresEntire area ifenclosedDivision 2Table 5.2 Continued820–26 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESRow LineLocationandFunctionFire andExplosionHazard VentilationExtent ofClassified Area1NEC-AreaElectricalClasTable 5.2 Continued820–25LIQUID STREAM TREATMENT PROCESSESRow LineLocationandFunctionFire andExplosionHazard VentilationExtent ofClassified Area1NEC-AreaElectricalClassificationAll Class I,Group DMaTable 5.2 Continued820–24 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESRow LineLocationandFunctionFire andExplosionHazard VentilationExtent ofClassified Area1NEC-AreaElectricalClasTable 5.2 Continued820–23LIQUID STREAM TREATMENT PROCESSESRow LineLocationandFunctionFire andExplosionHazard VentilationExtent ofClassified Area1NEC-AreaElectricalClassificationAll Class I,Group DMaTable 5.2 Continued820–22 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESRow LineLocationandFunctionFire andExplosionHazard VentilationExtent ofClassified Area1NEC-AreaElectricalClasTable 5.2 Continued820–21LIQUID STREAM TREATMENT PROCESSESRow LineLocationandFunctionFire andExplosionHazard VentilationExtent ofClassified Area1NEC-AreaElectricalClassificationAll Class I,Group DMaTable 5.2 Continued820–20 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESRow LineLocationandFunctionFire andExplosionHazard VentilationExtent ofClassified Area1NEC-AreaElectricalClasTable 5.2 Continued820–19LIQUID STREAM TREATMENT PROCESSESRow LineLocationandFunctionFire andExplosionHazard VentilationExtent ofClassified Area1NEC-AreaElectricalClassificationAll Class I,Group DMaChapter 5 Liquid Stream Treatment Processes5.1.2 This chapter shall not apply to treatment systems serv-D No ventilation or ventilated at less than six air changes per hour.FE Portable fire extinguiTable 4.2 ContinuedClassifieduntreated or partiallytreated wastewaterEnclosed820–17COLLECTION SYSTEMSb B Division 2 NC, LC, or LFS35 WASTEWATERHOLDING BASINS,LINED OR UNLINEDOpen structures holdingstoTable 4.2 Continued820–16 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESRow LineLocationandFunctionFire andExplosionHazard VentilationExtent ofClassified AreaNEC-AreaElectricalClassTable 4.2 Continued820–15COLLECTION SYSTEMSRow LineLocationandFunctionFire andExplosionHazard VentilationExtent ofClassified AreaNEC-AreaElectricalClassificationAll Class I,Group DMaterial ofConstruTable 4.2 Continued820–14 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESRow LineLocationandFunctionFire andExplosionHazard VentilationExtent ofClassified AreaNEC-AreaElectricalClassTable 4.2 Continued820–13COLLECTION SYSTEMSRow LineLocationandFunctionFire andExplosionHazard VentilationExtent ofClassified AreaNEC-AreaElectricalClassificationAll Class I,Group DMaterial ofConstruTable 4.2 Continued820–12 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESRow LineLocationandFunctionFire andExplosionHazard VentilationExtent ofClassified AreaNEC-AreaElectricalClass820–11COLLECTION SYSTEMSRow LineLocationandFunctionFire andExplosionHazard VentilationExtent ofClassified AreaNEC-AreaElectricalClassificationAll Class I,Group DMaterial ofConstructionfor Buildings 3.3.64.4 Wastewater Treatment.for the supply air that is exhausted. The number of air changes3.3.70 Wastewater. The spent water of a community that is a4.1* General.ClassifiedNNotes1ventilationT23.3.54 Sewer. A single pipe or system of pipes or conduits 3.3.55.1 Activated Sludge. A microbial mass grown in aera-820–9DEFINITIONSthat carries wastewater or drainage water.3.3.54.1 Branch Sewer. A 3.3.32.2* Fuel Gas. A gas used as a fuel source, including 8141 kJ/kg, where tested in accordance with NFPA 259820–8 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESnatural gas, man3.3.7.2 Screening Chamber. A chamber or enlargement of a 3.3.18.3 Trickling Filter. A treatment unit process consist-820–7DEFINITIONSsewer in which large suspended or floating solids or materialis remNFPA 499, Recommended Practice for the Classification of Com- 3.2.2* Authority Having Jurisdiction AHJ. An organization,820–6 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESbustibl1.4 Retroactivity. The provisions of this standard reflect a con- NFPA 11, Standard for Low-, Medium-, and High-Expansion820–5REFERENCED PUBLICATIONSsensus of what is necessary to provide an acceptablNFPA 8201.1.3 This standard shall not apply to the following820–4 FIRE PROTECTION IN WASTEWATER TREATMENT AND COLLECTION FACILITIESStandard forFire Protection in Wastewater Treatmentand Collection FaContentsChapter 1 Administration ............................... 820–41.1 Scope ............................................. 820–41.2 Purpose .......................................... 820–41.3 AppliTechnical Committee on Wastewater Treatment PlantsJohn R. Anderson,A. W. Ballard,Rep. NationalJohn N. HarrGary Hewitt,Rep. WaterAssociation,Agency,Mark Kreinbihl,Alt. to G.[M]David R. Hague,ThischangCopyright 2007 National Fire Protection Association. All Rights Reserved.Facilities,issuedsupersedes2007.responsibilitytohazardonInitialissuedwithmendedPrrevisedcontainsvariousmakeNFPStyleGlossaryDADDITIONAL NOTICES AND DISCLAIMERSUpdating of NFPA DocumentsUsers of NFPA codes, standards, recommended practices, and guides should be aware thatthese documents may be superseded at any time by the iIMPORTANT NOTICES AND DISCLAIMERS CONCERNING NFPA DOCUMENTSNOTICE AND DISCLAIMER OF LIABILITY CONCERNING THE USE OF NFPA DOCUMENTSNFPA codes, standards, recommended practices, and guides, of which theNFPA820 Standard for Fire Protection in Wastewater Treatment and Collection Facilities 2008 Edition NFPA, 1 Batterymarch Park, Quincy, MA 02169-7471 An International Codes and Standards Organization

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