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Terms used in Piping Engineering
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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)
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
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