ClassificationofChemicals - Protectoseal

1 ClassificationofChemicalsFlame&Detonatio nArresterSpecificationsPROTECTOSEAL The Pr ote ctoseal Company recommend s that the NationalElectricCod e (NEC)Ar ticle 500,rankingsof var ious chemi-cals be used , wh enev er possible,to determinethe suitabilityof a det onat ion arr est er for use wit h a particularche no NECrat ing of the par ticularchemicalis available,the Int ern ation al Elect rote chnicalCommission(IEC ) classifica-tion (Gr oup s IIA, IIB and IIC ) is recommendedas a seco ndarysourceof information for det erminingthe sui tabi lity of an ar -res ter for it s int en ded serv ice.

2 In general, the IEC GroupIIA isequivalen t to th e NEC GroupD; the IEC GroupII B is equiva-lent to the NEC Gr oup C; and the IEC GroupII C incl ud eschemicalsin the NECG roup s A and B. In th e ev ent of a dis -crepancybe twe en the NECand the IEC ratings,Protectosealrec ommend s th at the NECgroupsbe re ,ProplyeneOxideandCarbonDisulphide:The NECche micalgrouping s are fairlystraightforward exce ptas they relat e to a few specificcommonchemicals(Butadieneand Prop lye ne Oxide). Underwr ite rs Laboratoriesper formedtestingthat led to the classifi cation,by Group,of manyof thechemicalsin NEC Arti cle se test resultsare summa-riz ed in UL Bu lle tins of Research numbered58, 58A and erpt s fromth ese bulletins, as they relateto the two refe r-encedch emicals, are included.

3 The se exce rpts statethat thetwo che micalsmay be considered to be a me mberof mo rethan on e Group. Bullet in 58 indicates that,strictlyon thebasisof its flamepr opagation characteristics,ProplyeneOxidewou ld be classifiedas a GroupC mate rial, whileBut ad iene would qualifyas a Gro up D material. In each ofthese case s, the che micalswer e pr imar ly liste d in a hig he rcat ego ry (Gr oup B) , becauseof relatively hig h pre ssureread -ings not ed in one phaseof the st and ar d te st pr oce dur e con -duct ed by Unde rwr it ers Lab orat or ie s.

4 Thesepre ssur es we reof co ncer n when cate gor izingthe chemicalsbecausetheseNEC gro up ings ar e also usedas st and ard ind icato rs for thedesi gn st reng th req uir eme nt s of ele ctricalboxes, ap par atus,etc. that mustwit hst and the pr essures gene ratedby an igni -tion wit hin the co nt aine r. It sho uld be no ted that,in each ofthese case s, the test pressures reco rde d wer e sig nificantlylower than tho se co mmonlyenco unte red whe n testinga deto -nat ion arr est er fo r its abilit y to withst and stableand ove r-driv en deto nat th e basis of the info rmat io n prese nte d in the re fe rence dBul letins, and on the basis of the "d oub le listi ng " available inNEC Ar ticle 500 for each of theseche micals,Pro tectose alrecommends that , for purp oses of sp ecifyingdeto natio n ar -reste r.

5 They (B ut ad ie ne and Pr op lye ne Oxid e) be tr eate d asGr oup C mat a point of info rmation,the IEC ratin gsof each of these two che micalsis IIB, whichroug hly co rr e-sp on ds to the NEC Gro up C on Disulphide is sp ecifiedin NEC Ar ticle 50 0 as repre-se nting a spe cial haz ar d re quiringsafe guar ds be yo nd thoserequ ired fo r any of the st and ard che micalgro up s includeGr oup B, Hyd rog en, and Gr oup A, Ace ty lene . Pr ote ct ose alwill not offe r bid s or honor or der s fo r flameor de tonation ar -reste rs fo r use in Car bo n Disulp hid e se tald ehydeGro up IIAGrou p CAssume Grou p CAce tic AcidGro up IIAAce to neGro up IIAGr ou p 2mmAce to nit rileGro up IIAGr ou p 0mmAce ty l Chlo rideGro up IIAAce ty la cet oneGro up IIAAce ty le neGro up IICGrou p AAssume Grou p.

6 37 mmAcro lei nGr ou p IIBGr ou p BAssumeGr oup BAcry lald ehydeGr ou p IIBA crylonit rileGr ou p IIBGr ou p DAssumeGr oup mmAlly l AlcoholGrou p CAlly l Chlo rideGro up IIAGr ou p DAminoetha nolGro up IIAA mmoni aGro up IIAGr ou p 7mmwww .prot ec tose al .comPage 2 ClassificationofChemicalsFlame & Det onat ion Ar rester Spec ificationsCHEMICALIECGROUPINGNECGROUPING CONFLICTRESOLUTIONMESGIEC79-1 Amph et amineGro up IIAAmyl Ace ta teGro up IIAGro up D0. 99m mAm yl Met hyl Ket oneGro up IIAA nile neGro up IIAB enze neGro up IIAGro up DBe nz ot rif lo urideGro up IIABe nzylChlo rideGro up IIABr omo bu ta neGro up IIABr omoethaneGro up IIABu tad ie neGro up IIBGr ou p B( C)Assume Gr oup C0.

7 79m mBu ta neGro up IIAGro up D0. 98m mBu tano lGro up IIAGro up D0. 94m mBu tyl Ace tat eGro up IIAGro up D1. 02 mmBut yl Glycolat eGro up IIB0. 88m mBu ty l Me rca pta nGr ou p CBu ty l Me th yl Keto neGro up IIABu ty lam ineGro up IIAGro up DBu tyle neGro up DBu tr ald ehydeGro up DCa rbonDisulphideGro up IICNoneNo Quo ta tio n0. 34m mCarbon MonoxideGro up IIAGr ou p CAssume Gr oup C0. 94m mChlorobe nzeneGro up IIAGro up DChlorobut aneGro up IIAC hlor oe thaneGro up IIAC hloroetha nolGro up IIAC hlor oe thyleneGro up IIAC hlor ome thaneGro up IIAC hloropre neGro up DChlo rop ro paneGro up IIACoalTa r Napt haGro up IIACoke Ove n Ga sGro up IIBww ct ose al.

8 ComPage 3 ClassificationofChemicalsFla me & Det onat ion Ar re ste r Spec ifi ca tionsCHEMICALIECGROUPINGNECGROUPINGCONFL ICTRESOLUTIONMESGIEC79-1Cr eso lGr ou p IIACro to nald ehydeGr ou p II BGrou p CCum eneGr ou p IIAGr ou p DCyclobut aneGr ou p IIAC yclohep taneGr ou p IIAC yclohe xa neGr ou p IIAGr ou p mmCyclohex anolGr ou p IIAC yclo hex anoneGr ou p mmCyclohexe neGr ou p DCyclo hex lam ineGr ou p IIAC yclope nt aneGr ou p IIAC yclopro pa neGr ou p II BGr ou p DAssume Group DCy me neGr ou p IIAD ecahydro naphthanleneGr ou p IIADe ca neGr ou p 2mmDi-is obu ty leneGr ou p DDi-i so pro phylmineGrou p CDi-n-pr op yla mi neGrou p CDi ace tone AlcoholGr ou p IIADia mincethaneGr ou p IIADib ut yl Et herGr ou p II mmDichloro be nz eneGr ou p IIAD ichloro et ha neGr ou p IIAGr ou p 0mmDichloro et hyleneGr ou p IIAGr ou p DDicyclopent adi eneGrou p CDie thy l EtherGr ou p II BGrou p mmDia thy lam ineGr ou p IIAGrou p CAssumeGr oup CDiet hy la minoethanolGr ou p IIADim et hy l Ethe rGr ou p II mmDime thy la mineGr ou p IIAGrou p CAssumeGr oup CDim eth yla nilineGr ou p IIAww ct ose

9 Al .comPage 4 ClassificationofChemicalsFlame & Det onat ion Ar rester Spec ificationsCHEMICALIECGROUPINGNECGROUPING CONFLICTRESOLUTIONMESGIEC79-1Di ox aneGr ou p II BGr ou p mmDiox olaneGr ou p II BDipr opy let herGrou p IIAEp ichl or oh ydrinGr ou p II BGr ou p CEp ox yp ro paneGr ou p II BEt haneGr ou p IIAGrou p D0. 91m mEtha net hio lGr ou p IIAEtha nolGr ou p IIAGrou p mmEthanolam ineGr ou p IIAEth yl Acet ateGr ou p IIAGrou p mmEth yl Ace toa ceta teGr ou p IIAEth yl Acry la teGr ou p II BGrou p DAssume Group mmEth yl BenzeneGr ou p IIAGrou p DEth yl Chlori deGrou p DEt hy l Form at eGr ou p IIAGrou p DEt hy l Mer capt anGr ou p IIAGr ou p CAssume Group DEth yl Me thacrylateGr ou p IIAEth yl Me thyl EtherGr ou p II BEth yl Met hyl Ket oneGr ou p IIAGrou p DEth yl Mo rpholineGr ou p CEth yl Nitr ateGr ou p IICEt hyl Ni trit eGr

10 Ou p mmEt hyla mi neGrou p DEth ylb enzeneGr ou p IIAGrou p DEth ylcyclobut aneGr ou p IIAEth ylcy clohexaneGr ou p IIAEt hy lcy clopentaneGr ou p IIAEthy le neGr ou p II BGr ou p mmEth ylen e DichlorideGrou p DEt hy leneOx ideGr ou p II BGr ou p BAssumeGr oup mmEth yle ne di am ineGrou p Dwww .prot ec tose al .comPage 5 ClassificationofChemicalsFla me & De tonat ion Arr est er Sp ec ific ationsCHEMICALIECGROUPINGNECGROUPINGCONF LICTRESOLUTIONMESGIEC79-1 EthylenimineGrou p CForma ldeh yde (gas)Grou p BFu ranGr ou p IIBGas olin eGrou p DHep tan eGr ou p IIAGrou p D0.