h-particula tetesting

8/8/2019 h-particula tetesting

1/11

N

P P T L

CBRNParticulate

Testin

g

Terry

Thornton

NIOSH/NPPT

LPublicMe

eting

HiltonGardenI

nn,Canonsb

urg,Pa

Thispresentationsho

uldnotbeconsideredafin

alstatementofNIOSH

po

licyorofanyagencyorindividualwho

wasinvolved.

Thisinformationisintendedforuseinadvancingknowledge

neededtoprotectworkers.

Comments

regardingthispresen

tationmaybesubmittedto

theNIOSH

DocketOffice

.


2/11

N

P P T L

N

P P T L

CB

RNParticulate

Testing

Particula

tetestingis

similartotheAPRandA

PER

particula

tetesting

P100Filter-Canister

sshallmeet

therequirem

ents

foraP-100filterwhic

his99.97%

particulatefilter

efficiencyagainstDO

P

Testings

hallbeperformedafterthedurability

condition

ing

Twenty(20)canisters

willbetestedagainstDOP

Additionallyninecan

istersfromcyclohexane

service

lifetests

willbeteste

dagainstDO

P


3/11

N

P P T L

N

P P T L

CB

RNParticulate

Testing

PAPRD

OPFlowR

ate

Constantf

lowPAPRIndividualcanisterstestedatth

e

airflowofthePAPR.For

multiplecanisterconfiguratio

nthe

airflowwillbereducedin

proportiontothenumberof

canisters

Demandre

sponsivePAP

R-Individualc

anisterstested

at

115Lpmformoderatebreathingrateor

300Lpmforhigh

breathingrate.Formultiplecanisterconfigurationthe

airflowwillalsobereduc

edinproportio

ntothenumberof

canisters

Intendonlookingatwaysofmeasuring

actualvolume

ofair

throughth

ecanisteroveraspecificperiodoftime


4/11

N

P P T L

N

P P T L

CB

RNParticulate

Testing

PAPRD

OPFlowR

ate

Weareaw

arethatther

eisaneedtoperformth

e

particulate

testatthes

ameairflow

thatthePAP

Runits

supply.

Evaluating

twoseparateconcepts

1.Havenewequipmentdeveloped

toperform

DOP

testing:researchingdevicesthatwillallowtesting

offilter

supto500L

pm.

2.Usethe

existingTS

I8130equip

mentforDO

P

testing:maximuma

irflowofapproximately110Lpm

generatingroughly

100mg/m3


5/11

N

P P T L

N

P P T L

CB

RNParticulate

Testing

1st

Concept:HighFlowTesterEquipment

Individual

canisterswillb

etestedatthe

airflowdeterm

inedfrom

thePAPR.

Thisisthesameairflowasthecanisterservicelife

testing

Formultip

lecanistercon

figurationtheairflowwillber

educedin

proportion

tothenumberofcanisters

Example:PAPRwithmea

suredairflowof240Lpmwiththree

canisterselements,singlecanisterwillbetestedat80

Lpmwith

theloadingproportionallyreducedto67mg

Example:Airflowof240L

pmwithonec

anister,canisterwillbe

testedat2

40Lpmwithth

eloadingchallengeof200mg


6/11

N

P P T L

N

P P T L

CB

RNParticulate

Testing

2ndConcep

t:ExistingE

quipment

Testingw

illbeperformedusingatest

unitsized

proportionally,withthesameeffective

surfaceareaand

geometry,totheairflow

ofthePAPRto

producean

Equivale

ntFaceVelocitythroughthe

filterataflow

rateof85

Lpm.Tes

tunitswillbep

rovidedbythe

manufacturer

Example:

PAPRwithair

flowof240Lpm

usingtwoca

nisters

withanar

eaof100cm2.

Testunitswouldbeproducedto

haveanareaof71cm2

andtestedat85Lpm

Theloading

wouldalsobereducedp

roportionallytoachallengeo

f142

mg


7/11

N

P P T L

N

P P T L

CB

RNParticulate

Testing

Calculationsfortheex

ample

240Lpm

with2canisters,so120

Lpmper

canister

Setupratio,Xcm2/

85Lpm=100cm2/120L

pm

andsolv

e

X=71cm2

Thereforethetestu

niteffectiv

esurfacearea

wouldb

e71cm2

Thecon

centrationw

ouldalsobe

reduced

proportionallyfrom200mgto14

2mg

(Xmg/2

00mg=71cm2/100cm

2)


8/11

N

P P T L

N

P P T L

CB

RNParticulate

Testing

2ndConcept:Exis

tingEquipm

ent(continued)

Twenty(20)TestUn

itswillbetestedagains

tDOP

at85Lpm

Twenty(20)productioncanisters

willbeteste

d

againstD

OPat85Lp

mafterdura

bilitytesting

Additionallythenine

productioncanistersfro

m

cyclohex

aneservice

lifetestwill

betestedag

ainst

DOPat8

5Lpm


9/11

N

P P T L

N

P P T L

CB

RNParticulate

Testing

Req

uirements

1stConcep

t

Highflow

DOPTesters

2ndConcept

Studyof

equivalentfacevelocity

techniquesand

benchma

rkingoftestunits


10/11

N

P P T L

N

P P T L

CB

RNParticulate

Testing

1.

Inputfr

omthemanufacturerandusercomm

unity

Howwillthedecision

bemadeandwhatfactorswill

beusedtodecidew

hichapproa

chwillbeused?

2.Analysisofpurchas

ingandmaintenance

requirementsofhig

hflowDOP

testers

3.Benchm

arkstudies

ofequivalen

tfacevelocity

testing


11/11

N

P P T L

N

P P T L

CB

RNParticulate

Testing

Questio

nsandComments

Q:

h-particula tetesting

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