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NFPA20

Update

2013

Edition

. , . . . . . . .

VicePresidentofEngineering

NFPA20Update2013Edition

GoalsandObjectives

Bytheendofthispresentation,the

participantwillbeableto:

1. Repeatthe

revision

cycle

for

NFPA

20

2. Discusshowtousetheprovisionsofthe2013

e itioneveni apreviouse itionis eing

enforced

3. Designafirepumpsystemforaverytall

building

4. Discussthedifferencesbetweenlimitedservice

controllersandregularfirepumpcontrollers

NFPA20Update2013

Revisioncycle

Whydoesthismatter?

Watermistpumps

Firepumpinstallationissues

Pumpsinseries

Highrisebuildings

Reliabilityofpowersupplies

Fuelsupply

Othermiscellaneous

items

RevisionCycle

ProposalsdueOctober2010

CommitteeROPMeeting,Jan.2011

ROPopenforcommentuntilAugust2011

Committee ROC Meetin Oct. 2011

VotedbyNFPAmembershipinJune2012

NFPAStandardsCouncilinAugust2012

IssuedinSept.2012with2013date

Electronicversionavailablenowfromwebsite

PrintedversionbylateOctober

Whydoesthismatter?

Weallneedtokeepuptodate

Limitourliability

Mostchangesareclarificationofoldtext

Manufacturers will chan e their roduct lines

tomeetthenewrules

Newtechnologyoralternatearrangements

(Equivalency)

Whydoesthismatter?

Newtechnologyoralternatearrangements

ForExample:NFPA20 2007

1.5Equivalency.Nothinginthisstandardisintended

topreventtheuseofsystems,methods,or

ev ceso equ va en orsuper orqua y,s reng ,fireresistance,effectiveness, durability,andsafety

overthoseprescribedbythisstandard.

Systemsmeetingthe2013editionofNFPA20

areequivalentorsuperiortothosemeeting

the2007edition

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NFPA202013

FirePumpInstallationIssues

WaterMistPumps

Anumberofchangesthroughoutthe

document

Clarifiedthe

rules

for

multiple

small

volume

positivedisplacementpumpsusedasasingle

pumpingunitforawatermistsystem

Singlecontroller

HelpsNFPA20workwithNFPA750andlisted

watermistsystems

8

WithinSightof

ThereareanumberoflocationsinNFPA20

whereitspecifiesthattwodifferentpartsof

thepumpinstallationneedtobewithin

sightofeachother

Thistermwasdefinedaseachoftheitems

beingvisibleandnotmorethan50ftdistant

fromtheotheritem

9

Plans(4.2.3.1)

Plansneedtobedrawntoscale

Listof14itemsthatneedtobeincludedon

plans

10

PumpsinSeries

Proposalstoputallpumpsinseriesinthe

samepumproom

Ultimately,theseproposalsfailed,butbeon

the

lookout

for

this

in

future

editions

11

CommitteesConcernsaboutPumpsinSeries

Verticalstagingofpumpsishardtodo

correctly

Ifthehighpumpstartsbeforethelowpump,the

highpumpcouldbedamaged

Intercontro wiring etweencontro erscou e

damaged

Communicationbetweenpeopleinseparate

pumproomsisdifficult

Testingofpumpsisdifficult

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VerticalStagingofPumps

To High Zone

Standpipe Risers

High Zone Pump

(Where will water

FirePump

Controller

To Low Zone

Standpipe Risers

Low Zone Pump

FirePump

Controller

PumpsinSeries

To Low Zone

To High Zone

Standpipe Risers

FirePump

Controller

tan p pe

Risers

Low Zone Pump

High

Zone

Pump

FirePump

Controller

Test equipment is

easier to arrange

PumpsinSeries NFPAMembership

Pumpscanbeverticallystaged,if:

Intercontrolwiringisatleastratedfor2hrs

Considerationisgiventoprovidingasafetesting

arrangement(cantjustuseclosedloopmetering)

Methodiscreatedforpeopleinpumproomsto

communicatewitheachother

Ownerneedstobeawareofimportanceoflow

zonepumpandneedtomaintain

SpaceintheRumpRoom(4.12.1.1.6)

Thepumproomneedstobedesignedwith

spacefor:

ClearancebetweencomponentsforITM

ClearancebetweencomponentsandwallsforITM

Clearancebetweencomponentsandenergized

electricalequipment

Orientationofthesuctionpipe

16

SuctionPipeWaterVelocity

Standardhassaidforyearsthatthemaximum

velocityis15ft/secinsuctionpipe

Standardhasalsoprovidedminimumpipesizes(in

Tables)anddefinedmaximumflows

W enyouputtoget ert e e ine maximum ows

andminimumpipesizes,youendupwithvelocities

of15.1ft/secand15.3ft/secinsomecases

Committeeclarifiedthatisokaybydeleting15

ft/secruleandaddinganotetotheTableonwhy

thesepipesizeswereselected

AgeofWaterSupplyTests

Anewsection4.6.1.2wasaddedtorequire

thatwatersupplytestsusedtodeterminethe

adequacyofwatersuppliesbedonewithin12

monthsofthesubmissionoftheworking

p ans.

18

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TestHeaders

Thevalveonthepipetothetestheaderneeds

tobeinstalledevenifthetestheaderisnotin

anarea

subject

to

freezing

(4.20.3.3.1)

Thevalveneedstobesupervisedclosed

(4.16.2)

Testheadercanbeindoorsaslongasitisnot

inthepumproomandwatercanbe

dischargedduringtesting(4.20.1.4)

19

AccuracyofMeters

Forflowmeterlinesthatareloopedbackto

pumpsuctionorwatertanks

Ameans

will

need

to

be

included

downstream

ofthemetertotesttheflowsothatthe

accuracyofthemetercanbechecked

Couldbeadifferenttestheaderfromtheone

usedtotestthepump

Ortherecouldbeapipeconnectingthe

dischargefromthemetertothetestheader

20

MeterArrangement ElbowsandTeesinSuctionfor

HorizontalSplitCasePumps

Newthreedimensional(isometric)figures

wereaddedtotheannextoshowcorrectand

incorrectcombinationsofteesandelbows

22

ElbowsandTees

23

ElbowsandTees

24

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QuestionsfromPart1

1. Whenweretheissuesdealingwiththe2013

editionofNFPA20votedonbythe

membershipof

the

NFPA?

2. Whyshouldyoucarewhatisinthe2013

editionsincethejurisdictionyouworkinhas

probablynotyetlegallyadoptedit?

HighRiseBuildings

Definition:morethan

75ft(23m)fromthe

lowestlevel

of

fire

departmentvehicle

accessto ig est oor

forhumanoccupancy>75ft

Chapter5 HighRise

RewriteofChapter

Sections5.1through5.5applytoallhighrise

buildings

Section5.6appliestoVeryTallBuildings

NoindicationwhatVeryTallBuildingsare,

butthereisanimplicationthatthesearethe

buildingsthataretootallfortheFire

Departmenttogetreasonablepressuretothe

topfromthestreet

Section5.6VeryTallBuildings

WaterSupplyTanks(paraphrased)

Wheretheprimarysourceisatank,youneedtwo

ormoretanks(compartmentsinasingletankare

okayiftheyarevalvedseparately)

e an s ave o es ze so a w enanyone

tankisoutofservice,youstillhaveatleast50%of

thedurationdemand

Eachtankneedsanautomaticrefillvalve

Eachtankneedsamanualrefillvalve

The

refill

valves

have

to

be

sized

and

arranged

to

providethefireprotectionsystemflowdemand

Section5.7VeryTallBuildings

WaterSupplyTanks(Section5.7.1.5)

Theautomaticandmanualfillvalvecombination

foreachtankortankcompartmentshallhaveits

ownconnectiontooneofthefollowing

pump

Areliabledomesticrisersizedtomeetthe

requirementsof5.7.1.4(fullflowdemandofsystem)

VeryTallBuilding

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Section5.8FirePumpBackUp

Forpumpsservingzonesthatarepartiallyor

whollybeyondthepumpingcapabilityofthe

FireDepartment,

do

either

of

the

following:

Provideabackuppump(fullymeetingallsystem

eman s

Provideanauxiliarymeansofmeetingallofthe

systemdemands(acceptabletotheAHJ)

VeryTallBuilding

ReliablePowertoElectricMotors

Theannexnotethatdiscussestheattributesofareliablepowersupplywasmodified

Removedthediscussionofpoweroutagesduringstorms

standbypowerforallfirepumps

TheimpairmentproceduresofNFPA25couldbeusedwhenpoweroutagesoccurratherthanforcingeveryonewithanelectricmotordrivenfirepumptoinstallagenerator

33

LimitedServiceController

Ratherthaneliminatethem,upgradedthe

circuitbreaker

Onlydifferencebetweenfullservice

controllerswillbetheisolationswitch

34

DikesandFuelTanks

Thecommitteeclarifiedachangethatthey

triedtomakelastcycletostatethatdikesare

notrequiredwhendoublewalltanksareused

35

CleaningupFuel

Acommentwasacceptedbythecommitteeto

requirealistedactivefuelmaintenance

systemtobeinstalledonallfuelstoragetanks

This

was

overturned

by

the

NFPA

membership Theissueisstillvalid,thereneedstobeaplan

forhowallownerswillmaintaintheirfuel

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AcceptanceTestForm

Theforminthestandardwasupdatedwithall

ofthenewrequirementssinceitwaslast

updated

37

QuestionsAfterPart2

3. Atankholding15,000gallonsisbeingused

asapartofafireprotectionsystemforthe

topfloors

in

abuilding

600

ft

tall.

How

many

automaticfillvalvesdoesthetankneed?

4. Aftermanufacturersstartimplementingthe

rulesinthe2013editionofNFPA13,whatis

themaindifferencegoingtobebetweena

limitedservicecontrollerandaregular(full

service)controller?

39