ABBREVIATIONS & ACRONYMS

General Abbreviations & Acronyms

AL
Amer. Std.
AB
app.
appl.
appd.
AFC
approx.
arch.
A
AD
arr.
asph.
assem.
asst.
assoc.
assn.
atm.
auto.
aux.
avg.

B to B
bar
B/L
BP
bat.
bm.
brg.
BM
Bet.
B/M
BF
blk.
BD
bd.
blr.
BFW
BC
bot.
BOS
brkt.
BHP
BTU
bldg.
BL
BW

cab.
calc.
calcs.
cap.
CO2
CS
CI
Cat.
CB
clkg.
clg.
cem.
Ctr.
CL
C to C
cert.
CMTR
chg.
CN
chk.
chem.
circ.
CO
CIP
clr.
CW
coef.
CW
coll.
col.
comb.
com.
comm.
co.
comp.
compr.
CAD
CAM
conc.
conc.
cond.
conn.
const.
cont.
contr.
contr.
cv or cont. va.
conv.
CT
CW
corp.
corr.
CCW
cplg.
cu
cfm
cfs
cf or cu3
cyl

deg.
dept.
des.
DCN
DCR
det.
diag.
dia.
dim.
dir.
disch.
disc.
div.
dr.
dbl.
dn.
ds
doz.
dr.
dwg.

ea.
ecc
EFD
ell
elec.
elev.
engr.
eq.
equip. or eq.
exc.
exh.
exp.
exp. jt.
ext.

FS
fin. fl.
fin. gr.
1st
ftg.
fix.
flg.
FF
flex.
fl.
FD
FE
fab.
F
FS
FD
FPM
FPS
FW
fin.
FT
ftg.
FS
fdn.
fr.
FOB
freq.
furn.

ga.
GPH
GPM
galv.
gskt.
gen.
GL
govt.
gr.
GL
grtg.
grnd.
grndg.
gyp.
gyp. bd.

HH
HR
Hdw.
hd.
hdr.
htr.
HV
HVAC
hvy.
hgt.
hex.
hor. or horiz.
HP
HW
hr.

in.
info.
ID
instr.
insul.
int.
int.
inv.
IPS
iso
IFA
IFC
IFR

jt.

lab.
lat.
lh.
lt.
ltg.
ln.
loc.
lg.
lp
LP

mach.
maint.
MI
MH
mfg.
mfr.
mk.
matl.
max.
MSL
mtr.
MCC
mtd.

natl.
NG
NS
neg.
NPSH
NPSHA
NPSHR
nip.
nom.
norm.
NC
NO
NTS
no.

off.
orig.
OD
OA
OAL
ovhd.

pnl.
par.
part.
pass.
ped.
perf.
perp.
PFD
ph.
P&ID
pc.
pl.
pt.
pol.
pwr.
prefab.
prelim.
prep.
press.
PRV
proc.
proj.
PA
PO

qty.

rad. or r
rlg.
RR
RW
recvr.
rec.
red.
ref.
reinf.
RFC
reloc.
reqd.
req.
rev.
RPM
rt.
RH
rsr.
rd.
rf.
RD
rm.
RG
rd.

sch.
scr.
scrd.
sec.
sect.
swr.
sht.
sk.
SJ
sg
spec.
sq.
SS
std.
sta.
SIP
stl.
stg.
SD
str.
st.
struc.
sub.
suct.
supt.
sym.
sys.

tan.
tk.
tech.
tel.
temp.
thk.
thd.
TOC
TOP
TOS
tot.
twr.
trans.
TS
turb.
typ.

UG
Util.

vac.
va.
var.
VTR
Vert.
VC
Vol.

Whse.
Wtr.
WC
WL
WOG
wt.
w/
w/e
w/o
WP

aluminum
American Standard
anchor bolt
approve
approval
approved
Approved For Construction
approximate
architectural
area
area drain
arrangement
asphalt
assembly
assistant
associate
association
atmospheric
automatic
auxiliary
average

back to back
barometric
base line
base plate
battery
beam
bearing
bench mark
between
bill of material
blind flange
block
Blow Down
board
boiler
boiler feedwater
bolt circle
bottom
Bottom Of Steel
bracket
brake horsepower
British Thermal Unit
building
building line
butt weld

cabinet
calculate
calculations
capacity
carbon dioxide
carbon steel
cast iron
catalog
catch basin
caulking
ceiling
cement
center
centerline
center to center
certified mail
Certified Mill Test Report
change
change notice
check
chemical
circle, circulate, circulation, circumference
cleanout
Clean In Place
clear, clearance
clockwise
coefficient
city water, cold water
collector
column
combination, combine
common
communication
company
complete
compressor
Computer Aided Design
Computer Aided Manufacturing
concentric
concrete
condenser, condensate
connection, connect
construction
continue, continuation
contractor
control
control valve
conveyor
cooling tower
cooling water, chilled water
corporation
corrugated
counter clockwise
coupling
cubic
cubic feet per minute
cubic feet per second
cubic feet
cylinder

degree
department
design
design change notice
design change request
detail
diagonal
diameter
dimension
direction
discharge
disconnect, discontinue
divisio
door
double
down
downspout
dozen
drain
drawing

each
eccentric
Engineering Flow Diagram
elbow
electric
elevation
engineer
equal
equipment
excavate
exhaust
expansion
expansion joint
exterior

far side
finished floor
finished grade
first
fitting
fixture
flange
flat face
flexible
floor
floor drain
flow element
fabricate
Fahrenheit
finished surface
feed
Feet Per Minute
Feet Per Second
field weld
finish
flow transmitter
footing
forged steel
foundation
frame
freight on board
frequency
furnished

gage or gauge
Gallons Per Hour
Gallons Per Minute
galvanized
gasket
general
girt line
government
grade
grade line
grating
ground
grounding
gypsum
gypsum board

handhold
handrail
hardware
head
header
heater
Heating & Ventilating
Heating, Ventilating & Air Conditioning
heavy
height
hexagon
horizontal
horsepower
hot water
hour

inch
information
inside diameter
instrument
insulation
interior
internal
invert
iron pipe size
isometric
Issued For Approval
Issued For Construction
Issued For Review

joint

laboratory
lateral
left hand
light
lighting
line
location
long
low point
low pressure

machine
maintenance
malleable iron
manhole
manufacturing
manufacturer
mark
material
maximum
mean sea level
motor
motor control center
mounted

national
natural gas
near side
negative
Net Positive Suction Head
Net Positive Suction Head Available
Net Positive Suction Head Required
nipple
nominal
normal
Normally Closed
Normally Open
Not To Scale
number

office
original
outside diameter
overall
overall length
overhead

panel
parallel
partial
passage
pedestal
perforate
perpendicular
Process Flow Diagram
phase
Process & Instrument Diagram
piece
plate
point
polish
power
prefabricated
preliminary
preparation
pressure
Pressure Reducing Valve
process
project
public address
Purchase Order

quantity

radius
railing
railroad
raw water
receiver
recovery
reducer
reference
reinforce
Released For Construction
relocate
required
requisition
revise, revised, revision
Revolutions Per Minute
right
right hand
riser
road
roof
roof drain
room
rough grade
round

schedule
screw
screwed
second
section
sewer
sheet
sketch
solder joint
specific gravity
specification
square
stainless steel
standard
station, stationary
Steam In Place
steel
storage
storm drain
straight
street
structure
subcontractor
suction
superintendent
symetrical
system

tangent
tank
technical
telephone
temperature
thick
thread or threaded
Top Of Concrete
Top Of Pipe
Top Of Steel
total
tower
transformer
tube steel
turbulent
typical

under ground
utility

vacuum
valve
variable or variation
vent through roof
vertical
vitrified clay
volume

warehouse
water
water column or water closet
water line
water, oil & gas (working pressure)
weight
with
with equipment
without
working point or working pressure

 

Pipe & Equipment Abbreviations & Acronyms

AARH
BB
BBE
BHN
Bld.
BOE
BE x TE
BOI
BOP
B x T
BU
conc. red.
ecc. red.
ell
EOL
EOP
F to F
F/F
F&D
FF
flg.
FOB
FOT
FHF
HF
HFC
LEB
LEP
LET
LOL
NPS
NPT
NRS
OS&Y
PBE
PE
POE
RCP
RF
RJ
RS
RMS
RBB
SO
SEB
SEP
SET
SW
Std. Wt.
TBE
TOE
TOL
WOG
WN
WOL
XH
XXH
arithmetic average roughness height
bolted bonnet
bevel both ends (pipe nipple)
brinell hardness number
blind (flange)
bevel one end (pipe nipple)
beveled end by threaded end (pipe nipple)
bottom of insulation
bottom of pipe
beveled by threaded (pipe nipple)
back-up (flange)
concentric reducer
eccentric reducer
elbow
elbolet
end of pipe
face to face
face of flange
faced & drilled
flat face (flange)
flange
flat on bottom (eccentric reducer)
flat on top (eccentric reducer)
full hard surface
hard faced
hard faced seats
large end beveled (swage)
large end plain (swage)
large end threaded (swage)
latrolet
nominal pipe size
national pipe taper
non-rising stem (valve)
outside screw & yoke (valve)
plain both ends (pipe nipple)
plain end (pipe nipple)
plain one end (pipe nipple)
reinforced concrete pipe
raised face
ring joint (flange)
rising stem (valve)
root mean square (roughness height)
round bolted bonnet (valve)
slip-on (flange)
small end beveled (swage)
small end plain (swage)
small end threaded (swage)
socketweld (flange or fitting)
standard weight (pipe schedule)
thread both ends (pipe nipple)
thread one end (pipe nipple)
threadolet
water, oile & gas
weldneck (flange)
weldolet
extra heavy (pipe schedule)
double extra heavy (pipe schedule)

 

Non-Metallic Piping Abbreviations & Acronyms

ABS
CAB
CP
CPVC
FEP
PB
PE
PFA
POM
POP
PP
PPS
PR
PTFE
PVC
PVDC
PVDF
RPM
RTR
SDR
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