Pipe & Equipment Abbreviations & Acronyms Non-Metallic Piping Abbreviations & Acronyms

AARH arithmetic average roughness height ABS

BB bolted bonnet CAB

BBE bevel both ends (pipe nipple) CP

BHN brinell hardness number CPVC

Bld. blind (flange) FEP

BOE bevel one end (pipe nipple) PB

BE x TE beveled end by threaded end (pipe nipple) PE

BOI bottom of insulation PFA

BOP bottom of pipe POM

B x T beveled by threaded (pipe nipple) POP

BU back-up (flange) PP

conc. red. concentric reducer PPS

ecc. red. eccentric reducer PR

ell elbow PTFE

EOL elbolet PVC

EOP end of pipe PVDC

F to F face to face PVDF

F/F face of flange RPM

F&D faced & drilled RTR

FF flat face (flange) SDR

flg. flangeFOB flat on bottom (eccentric reducer)

FOT flat on top (eccentric reducer)

FHF full hard surface

HF hard faced

HFC hard faced seats

LEB large end beveled (swage)

LEP large end plain (swage)

LET large end threaded (swage)

LOL latroletNPS nominal pipe size

NPT national pipe taper

NRS non-rising stem (valve)

OS&Y outside screw & yoke (valve)

PBE plain both ends (pipe nipple)

PE plain end (pipe nipple)

POE plain one end (pipe nipple)

RCP reinforced concrete pipe

RF raised face

RJ ring joint (flange)

RS rising stem (valve)

RMS root mean square (roughness height)

RBB round bolted bonnet (valve)

SO slip-on (flange)

SEB small end beveled (swage)

SEP small end plain (swage)

SET small end threaded (swage)

SW socketweld (flange or fitting)

Std. Wt. standard weight (pipe schedule)

TBE thread both ends (pipe nipple)

TOE thread one end (pipe nipple)

TOL threadoletWOG water, oile & gas

WN weldneck (flange)

WOL weldoletXH extra heavy (pipe schedule)

XXH double extra heavy (pipe schedule)

Non-Metallic Piping Abbreviations & Acronyms

acrylonitrile-butadiene-styrene

cellulose acetate-butyrate

chlorinated polyether

chlorinated poly (vinyl chloride)

perfluoro (ethylene-propylene) copolymer

polybutylene

polyethylene

perfluoro (alkoxyalkane) copolymer

polyacetal, poly (oxymethylene)

poly (phenylene oxide)

polypropylene

poly (phenylene sulfide)

pressure rated

polytetrafuoroethylene

poly (vinyl chloride)

poly (vinylidene chloride)

poly (vinylidene fluoride)

reinforced plastic mortar

reinforced thermosetting resin

standard dimensional ratio

General Abbreviations & Acronyms

AL aluminumAmerican Standard

AB anchor bolt

app. approveappl. approvalappd. approvedAFC Approved For Construction

approx. approximate

arch. architectural

A areaAD area drainarr. arrangement

asph. asphaltassem. assemblyasst. assistantassoc. associateassn. association

atm. atmospheric

auto. automaticaux. auxiliaryavg. average

B to B back to back

bar barometric

B/L base lineBP base plate

bat. batterybm. beambrg. bearingBM bench mark

Bet. betweenB/M bill of material

BF blind flange

Amer. Std.

blk. blockBD Blow Down

bd. boardblr. boilerBFW boiler feedwater

BC bolt circlebot. bottomBOS Bottom Of Steel

brkt. bracketBHP brake horsepower

BTU British Thermal Unit

bldg. buildingBL building line

BW butt weld

cab. cabinetcalc. calculatecalcs. calculations

cap. capacitycarbon dioxide

CS carbon steel

CI cast ironCat. catalogCB catch basin

clkg. caulkingclg. ceilingcem. cementCtr. centerCL centerlineC to C center to center

cert. certified mail

CMTR Certified Mill Test Report

chg. changeCN change notice

chk. checkchem. chemical

CO2

circ.

CO cleanoutCIP Clean In Place

clr. clear, clearance

CW clockwisecoef. coefficient

CW city water, cold water

coll. collectorcol. columncomb. combination, combine

com. commoncomm. communication

co. companycomp. completecompr. compressor

CAD Computer Aided Design

CAM Computer Aided Manufacturing

conc. concentric

conc. concretecond. condenser, condensate

conn. connection, connect

const. construction

cont. continue, continuation

contr. contractor

circle, circulate, circulation, circumference

contr. controlcontrol valve

conv. conveyorCT cooling tower

CW cooling water, chilled water

corp. corporation

corr. corrugated

CCW counter clockwise

cplg. couplingcu cubiccfm cubic feet per minute

cfs cubic feet per second

cubic feet

cyl cylinder

deg. degreedept. department

des. designDCN design change notice

DCR design change request

det. detaildiag. diagonaldia. diameterdim. dimension

dir. directiondisch. dischargedisc. disconnect, discontinue

div. divisiodr. doordbl. doubledn. downds downspout

cv or cont. va.

cf or cu3

doz. dozendr. draindwg. drawing

ea. eachecc eccentricEFD Engineering Flow Diagram

ell elbowelec. electricelev. elevationengr. engineereq. equal

equipment

exc. excavateexh. exhaustexp. expansion

exp. jt. expansion joint

ext. exterior

FS far sidefin. fl. finished floor

fin. gr. finished grade

first

ftg. fittingfix. fixtureflg. flangeFF flat faceflex. flexiblefl. floorFD floor drainFE flow element

fab. fabricateF Fahrenheit

FS finished surface

FD feedFPM Feet Per Minute

FPS Feet Per Second

FW field weldfin. finishFT flow transmitter

equip. or eq.

1st

ftg. footingFS forged steel

fdn. foundation

fr. frameFOB freight on board

freq. frequencyfurn. furnished

ga. gage or gauge

GPH Gallons Per Hour

GPM Gallons Per Minute

galv. galvanized

gskt. gasketgen. generalGL girt linegovt. government

gr. gradeGL grade linegrtg. gratinggrnd. groundgrndg. groundinggyp. gypsumgyp. bd. gypsum board

HH handholdHR handrailHdw. hardwarehd. headhdr. headerhtr. heaterHV Heating & Ventilating

HVAC

hvy. heavyhgt. heighthex. hexagon

horizontal

Heating, Ventilating & Air Conditioning

hor. or horiz.

HP horsepower

HW hot waterhr. hour

in. inchinfo. information

ID inside diameter

instr. instrument

insul. insulationint. interiorint. internalinv. invertIPS iron pipe size

iso isometricIFA Issued For Approval

IFC Issued For Construction

IFR Issued For Review

jt. joint

lab. laboratorylat. laterallh. left handlt. lightltg. lightingln. lineloc. locationlg. longlp low pointLP low pressure

mach. machinemaint. maintenance

MI malleable iron

MH manholemfg. manufacturing

mfr. manufacturer

mk. markmatl. materialmax. maximumMSL mean sea level

mtr. motorMCC motor control center

mtd. mounted

natl. nationalNG natural gas

NS near sideneg. negativeNPSH Net Positive Suction Head

NPSHA

NPSHR

nip. nipplenom. nominalnorm. normalNC Normally Closed

NO Normally Open

NTS Not To Scale

no. number

off. officeorig. originalOD outside diameter

OA overallOAL overall length

ovhd. overhead

pnl. panelpar. parallelpart. partialpass. passage

Net Positive Suction Head Available

Net Positive Suction Head Required

ped. pedestalperf. perforateperp. perpendicular

PFD Process Flow Diagram

ph. phaseP&ID Process & Instrument Diagram

pc. piecepl. platept. pointpol. polishpwr. powerprefab. prefabricated

prelim. preliminary

prep. preparation

press. pressurePRV Pressure Reducing Valve

proc. processproj. projectPA public address

PO Purchase Order

qty. quantity

rad. or r radiusrlg. railingRR railroadRW raw waterrecvr. receiverrec. recoveryred. reducerref. referencereinf. reinforceRFC Released For Construction

reloc. relocatereqd. requiredreq. requisition

rev. revise, revised, revision

RPM Revolutions Per Minute

rt. rightRH right handrsr. riserrd. roadrf. roofRD roof drainrm. roomRG rough grade

rd. round

sch. schedulescr. screwscrd. screwedsec. secondsect. sectionswr. sewersht. sheetsk. sketchSJ solder joint

sg specific gravity

spec. specification

sq. squareSS stainless steel

std. standardsta. station, stationary

SIP Steam In Place

stl. steelstg. storageSD storm drain

str. straightst. streetstruc. structuresub. subcontractor

suct. suctionsupt. superintendent

sym. symetrical

sys. system

tan. tangenttk. tanktech. technicaltel. telephonetemp. temperature

thk. thickthd. thread or threaded

TOC Top Of Concrete

TOP Top Of Pipe

TOS Top Of Steel

tot. totaltwr. towertrans. transformer

TS tube steelturb. turbulenttyp. typical

UG under ground

Util. utility

vac. vacuumva. valvevar. variable or variation

VTR vent through roof

Vert. verticalVC vitrified clay

Vol. volume

Whse. warehouse

Wtr. waterWC water column or water closet

WL water lineWOG water, oil & gas (working pressure)

wt. weight

w/ withw/e with equipment

w/o withoutWP working point or working pressure