NFPA 287-2012 Standard Test Methods for Measurement of Flammability of Materials in Cleanrooms Using a Fire Progagation Apparatus (FPA) (Effective Date 1 2 2012).pdf

1、NFPA287 Standard Test Methods for Measurement of Flammability of Materials in Cleanrooms Using a Fire Propagation Apparatus (FPA) 2012 Edition NFPA, 1 Batterymarch Park, Quincy, MA 02169-7471 An International Codes and Standards Organization Become a MemberSubscribeto theRegister forSeminars, Webina

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25、NFPA, visit the NFPA website at www.nfpa.org. 12/11Copyright 2012 National Fire Protection Association. All Rights Reserved.NFPA287Standard Test Methods forMeasurement of Flammability of Materials in Cleanrooms Using aFire Propagation Apparatus (FPA)2012 EditionThis edition of NFPA 287, StandardTest

26、 Methods forMeasurement of Flammability of Materials inCleanrooms Using a Fire PropagationApparatus (FPA), was prepared by the Technical Committeeon Fire Tests. It was issued by the Standards Council on December 13, 2011, with an effectivedate of January 2, 2012, and supersedes all previous editions

27、.This edition of NFPA 287 was approved as an American National Standard on January 2, 2012.Origin and Development of NFPA 287This standard is based on an apparatus developed by Factory Mutual Research Corporation(now FM Global Research) in the mid-1970s. Since then, several organizations have constr

28、uctedthe apparatus from the original FM Global design. It is currently in active use at UnderwritersLaboratories in the United States; Gilbert International Ltd, Manchester, UK; INERIS, Verneuilen Halatte, France; and Rhone-Poulenc Research Center, Decines, France. The apparatus-associated test meth

29、ods are distinct from other fire standards because of the focus on character-izing hazards associated with large-scale, self-sustained, upward, or flow-aided fire propagation onmaterials and products, not just the response of materials to an imposed, external heat flux.This standard was developed to

30、 address concerns of the Technical Committee for Cleanrooms.The 2007 edition was a complete revision for compliance with the Manual of Style for NFPATechnical Committee Documents. It also contained a new option for an alternative exhaust system(4.9.2 and Annex C) based on testing conducted by FM Glo

31、bal Research.The 2012 edition is a reconfirmation of the earlier edition with minor editorial changes.2871NFPA and National Fire Protection Association are registered trademarks of the National Fire Protection Association, Quincy, Massachusetts 02169.Technical Committee on Fire TestsWilliam E. Fitch

32、, ChairPhyrefish Enterprises, Inc., FL SEFarid Alfawakhiri, American Iron and Steel Institute,IL MBarry L. Badders, Jr., Southwest Research Institute,TX RTJesse J. Beitel, Hughes Associates, Inc., MD SERobert G. Bill, Jr., FM Global, MA IGordon H. Damant, Inter-City Testing a 6.35 mmdiameter stainle

33、ss steel shaft at least 330 mm long resting on theload cell support point; a 100 mm diameter, 1.5 mm thick alumi-num load platform connected to the upper end of the stainlesssteel shaft by a collar; and two low-friction, ball-bushing bearingsthat guide the shaft as it passes through the top and bott

34、om,respectively, of the air distribution chamber.4.3.2* The stainless steel shaft shall incorporate, at the lowerend, a threaded adjustment rod.4.4 Ignition Pilot Flame. The ignition pilot shall consist of anethylene-air (6040 by volume) flame adjusted for a 10 mmlength and anchored at the horizonta

35、l end of a 50 mm long,6.35 mm outer diameter (O.D.), 4.70 mm inner diameter (I.D.),stainless steel tube.4.4.1 The horizontal section of the tube shall contain a four-hole ceramic insert to produce a stable flame and prevent flash-back.4.4.2 The pilot flame tube shall be able to be rotated and el-eva

36、ted to position the horizontal flame at specified locations nearthe specimen, as shown in Figure 4.3.1(a) and Figure 4.3.1(b).4.5 Ignition Timer. The ignition timer for measuring time tosustained flaming shall be capable of recording elapsed time tothe nearest tenth of 1 second and have an accuracy

37、of better than1 second in 1 hour.4.6 Gas Analysis System.4.6.1 The gas-sampling arrangement, as shown in Fig-ure 4.6.1, shall consist of a sampling probe in the test sec-tion duct, a plastic filter with a pore size of 5 microns to6 microns to prevent entry of soot, a condenser operating attemperatur

38、es in the range of 5C to 0C to remove liquids, atube containing an indicating desiccant 1020 mesh in sizeto remove moisture, a cartridge filter, a sampling pump that2876 MEASUREMENT OF FLAMMABILITY OF MATERIALS IN CLEANROOMS USING A FIRE PROPAGATION APPARATUS2012 EditionBare stainless steel ductto b

39、lower and roof152 mm diameter coated stainlesssteel exhaust duct152 mm diameter coated stainlesssteel test section3 ports 120 apart:one port averaging pitot tube formass flow rate measurement, twoports plugged2 ports 180 apart, forsmoke turbidimeter3 ports 120 apart:one port thermocouple probe,one p

40、ort product sampling probe,one port plugged152 mm diameter coatedstainless steel mixing ductGas mixing89 mm diameter orifice152 mm610 mm diameter coatedstainless steel intake funnel172 mm diameter quartz extension pipeStainless steel connector172 mm diameter quartz pipeFour infrared heaters,each wit

41、h 152 mm203 mm 500 W lamps6 mm aluminum mounting plate6 mm adjustable steel angle bracket100 mm diameter aluminum load platform186 mm diameter aluminum cylinder225 mm diameter water-cooledshield with pneumatic piston216 mm diameter aluminum air distribution box6 mm diameter stainless steel pilot tub

42、e6 mm diameter stainless steel shaftLoad cellSteel frame membersInlet airsupply191 mm73 mm78 mm139 mm296 mm70mm264 mm229 mm260 mm40 mm17mm1.91 m34mm60 mm790 mm3.4 m914 mm279 mm76 mm76 mm152 mm153 mmBlast gate and linearactuator control701 mm241 mm 81 mm 81 mm3 mm aluminum plate 165 mm 292 mm464 mm 5

43、1 mmFIGURE 4.1.2 Main View of Apparatus.2877TEST APPARATUS2012 Editiontransports the flow through the sampling line, and a systemflowmeter and manifolds to direct the flow to individualCO, CO2,O2, and hydrocarbon gas analyzers.4.6.1.1 The sampling probe, made of 6.35 mm (0.25 in.)O.D. stainless stee

44、l tubing inserted through a test section port,shall be positioned so that the open end of the tube is at thecenter of the test section.4.6.1.2 The sampling probe shall be connected to a tee fittingthat allows either sample or calibration gas to flow to the ana-lyzer and the excess to waste.4.6.2 The

45、 carbon dioxide analyzer shall permit measure-ments from 0 ppm to 15,000 ppm, and the carbon monoxideanalyzer shall permit measurements from 0 ppm to 500 ppmconcentration levels.4.6.2.1 Drift shall be not more than 1 percent of full scaleover a 24-hour period.4.6.2.2 Precision shall be 1 percent of

46、full scale, and the10 percent to 90 percent of full-scale response time shall be1 second or less.4.6.3 The inlet-air oxygen analyzer shall have a 10 percent to90 percent of full-scale response time of 1 second or less, an ac-curacy of 1 percent of full scale, a drift of not more than 50 ppmO2over on

47、e-half hour, and a range of 0 percent to 50 percent.4.6.4 An additional oxygen analyzer shall be permitted tomeasure the depletion of oxygen in the combustion products.4.6.4.1 This analyzer shall have the same specifications as theinlet-air analyzer but shall have a concentration range of19 percent

48、to 21 percent.10 mm plate6 mm shaft6 mm pilottube13 mm plateSteel “U”channelLoad cellPneumatic cylinderfor cooling shieldAttachingbracket3 mm plate(typ 4 places)High temperature heater(typ 4 places)6 mm plate (typ 4 places)Adjustablebracket(typ 8 places)providelocking devices.Seewater-cooledshield f

49、orconnection points.13 mm thick calcium silicateboard 102 mm 102 mm50 mm 50 mm 4.5 mmangle (alum)Specimen holder102 mm 102 mm,or 99 mm diameterFIGURE 4.3.1(a) Exploded View of Specimen Mounting.172 mm diameter quartz extension pipeStainless steel connector172 mm diameter quartz pipe3 mm aluminum plate 165 mm 292 mm6 mm adjustable steel angle bracket100 mm diameter aluminum load platform186 mm diameter aluminum cylinder225 mm diameter water-cooledshield with pneumatic piston216