MASTER ABBREVIATIONS LIST
The following abbreviated codes are proposed to be followed in Piping Specification for all projects.
Abbreviations Description Remark
+ WITH
45D 45 DEG
45DE 45 DEG
90D 90 DEG
90DE 90 DEG
A+C AMINE+CAUSTIC
A-20 ALLOY 20
ABS ASBESTOS
ANN. ANNEALED
ARV AIR RELEASE VALVE
AS ALLOY STEEL
THRD. STD (BOLT) ASME B 1.1 CL 2A,
B18.2.2 THRD. STD (NUT) ASME B 1.1 CL 2B,
UNC THRD FOR <=1" AND UN8 THRD FOR >1" DIA
BB BOLTED BONNET
BE BEVELED END TO B16.25
BET THREADED BOTH ENDS
BF BLIND FLANGE
BR BRANCH
BS BELLOW SEALED
BTERFLY BUTTERFLY
BW BUTT WELDING
CA CORROSION ALLOWANCE
CALC CALCULATION
CAP PIPE CAP
CAT CATEGORY
CHK CHECK
CI CAST IRON
CL CLASS
COA COATED
COAT COATED
COMP COMPRESSED
CON RED CONCENTRIC REDUCER
CONC CONCENTRIC
COND CONDENSATE
CONN CONNECTION
CORR CORRUGATED
COUP COUPLING
CRM CONDENSATE RETURN MANIFOLD
CRS CROSS
CS CARBON STEEL
CVR COVER
DEG DEGREE
DEG.C DEGREE CENTIGRADE
DIPH DIAPHRAGM
DN NOMINAL DIA
DPR DESIGN PRESSURE
DSS DUPLEX STAINLESS STEEL
DUAL DUAL GRADE
ECC ECCENTRIC
ECC RED ECCENTRIC REDUCER
EFW ELECTRIC FUSION WELDED
ELB ELBOW
EQL. EQUAL
ERW ELECTRIC RESISTANCE WELDED
EXT EXTERNAL
EXT.BONNET EXTENDED BONNET
FB FULL BORE
FBE FLANGED BOTH ENDS
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MASTER ABBREVIATIONS LIST
Abbreviations Description Remark
FBE FLG FIXED FLANGE BOTH ENDS
FBP FABRICATED FROM PIPE
FCPL FULL COUPLING
FF FLAT FACE
FLG FLANGE
FLGD FLANGE END
FLGD FLANGED
SCREWED TO NPT(F) TO B 1.20.1 up to and including 1.5”
FNPT & IS 554 between 2” and 6” inclusive
FO ORIFICE FLANGE
FOE FLANGED ONE END
GALV GALVANIZED
GASK GASKET
GF GLASS FILLED
GI GALVANIZED IRON
GNLLY GENERALLY
GO GEAR OPERATED
Gr GRADE
GRF GRAFOIL
GRPH GRAPHITE
H2 HYDROGEN
H2 SER HYDROGEN SERVICE
HAST HASTELLOY
HCPL HALF COUPLING
HDPE HIGH DENSITY POLYETHYLENE
HIC HYDROGEN INDUCED CRACKING
HO HAND WHEEL OPERATED
HORI HORIZONTAL
HPR HYDROSTATIC PRESSURE
HRL HARD RUBBER LINED
HVY HEAVY
HYD HYDRANT
HYP HYPALON
IBR INDIAN BOILER REGULATION
ID INSIDE DIAMETER
IMPACT IMPACT TESTED
IMPT IMPACT TESTED
INST INSTRUMENTATION
INT INTERNAL
JG J / U GROOVE ( FOR HIGH THICKNESS PIPE)
LAS LOW ALLOY STEEL
LBE FLG LOOSE FLANGE BOTH END
LE LAMINATED ENDS, TYPE L
LEB LONG END BUTT WELDED
LEB & SET LONG END BEVELLED & SHORT END B.W. THREADED
LEFLG LARGE END FLANGED
LEL LARGE END LAMINATED, TYPE L
LET LONG END THREADED
LET & SEB LONG END THREADED & SHORT END B.W.
LG LARGE GROOVE
LIN LINED
LJ LAP JOINT FLANGES
LLET LATROLET
LO LEVER OPERATED
LOE LAMINATED OTHER END TO TYPE L5
LOE FLG LOOSE FLANGE ONE END
LR LONG RADIUS(1.5D)
LT LARGE TONGUE
LTCS LOW TEMPERATURE C.S.
LW LONGITUDINALLY WELDED
MATL MATERIAL
MAX MAXIMUM
MBOLT MACHINE BOLT WITH HEAVY NUT
MFG STD MANUFACTURER’S STANDARD
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MASTER ABBREVIATIONS LIST
Abbreviations Description Remark
MFR. STD. MANUFACTURER’S STANDARD
SCREWED TO NPT(M) up to and including 1.5” & IS 554
MNPT between 2” and 6” inclusive
MV SPRAY NOZZLE MEDIUM
N+C NACE + CAUSTIC
NACE+A+H2+HIC NACE+AMINE+H2+HIC
NAT NATURAL
NBR NITRILE RUBBER
NIP NIPPLE
NLET NIPOLET
NOD NODULAR
NRL NATURAL RUBBER LINED
OD OUTSIDE DIAMETER
OEB ONE END BUTT WELDED
OET ONE END THREADED
OP. OPERATING
PADDLESPCR&BLNK PADDLE SPACER & BLANK
PBE PLAIN BOTH END
PCL PIPE CLASS NOTES
PDT PRESSURE DIFFERENTIAL TRANSMITTER
PE PLAIN END
PG PRESSURE GAUGE
PLG PLUG
PP POLYPROPYLENE
PREFAB PRE FABRICATED
PSB PRESSURE SEAL BONNET
PSL PRODUCT SPECIFICATION LEVEL
PT PRESSURE TRANSMITTER
PT1 PART 1
PTFE POLYTETRAFLUOROETHYLENE
QBD QUARTZOID BULB DETECTOR
RCPL REDUCING COUPLING
RED. REDUCING
REFRA.LIN REFRACTORY LINING
RF RAISED FACE
RL RUBBER LINED
RTFE REINFORCED POLYTETRAFLUOROETHYLENE
RTJ RING JOINT
RUB RUBBER
SAW SUBMERGED ARC WELDING
SBLD SPECTACLE BLIND
SBOLT STUD BOLT WITH TWO HEAVY NUTS
SC SQUARE CUT
SCH SCHEDULE
SCRB SCREWED BONNET
SCRD(F), IS554(P) SCREWED(F) TO IS554(P)
SCRD(F), IS554(T) SCREWED(F) TO IS554(T)
SCRD(M), IS554(T) SCREWED(M) TO IS554(T)
SEB SHORT END BUTT WELDED
SEFLG SMALL END FLANGED
SEL SMALL END LAMINATED, TYPE L
SER SERIES
SET SHORT END THREADED
SG SMALL GROOVE
SL SEAL
SLET SOCKOLET
SMLS SEAMLESS
SO SLIP-ON
SP WD SS304+GRPH SPIRAL WOUND SS 304 WITH GRAPH. FILLER
SP WD SS304+PTFE SPIRAL WOUND SS 304 WITH PTFE FILLER
SPCR SPACER
SR SHORT RADIUS(1D)
SS STAINLESS STEEL
SSM STEAM SUPPLY MANIFOLD
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MASTER ABBREVIATIONS LIST
Abbreviations Description Remark
ST SMALL TONGUE
STL STEEL
STLD STELLITED/HARD FACED
STN. STATION
STND STUB END
SW SOCKET WELDING
TEE TEE
TEMP TEMPERATURE
TG TEMPERATURE GAUGE
THERMOD THERMODYNAMIC
THK THICKNESS
THRD THREADED
TLET THREADOLET
TOE THREADED ONE END
TPR TEST PRESSURE
TRIP. ECC TRIPPLE ECCENTRIC
T-TY T-TYPE
TW THERMOWELL
U/G UNDERGROUND
UON UNION
V. VALVE
VAL VALVE
VAL. VALVE
VERT VERTICAL
VLE VALVE
VLV VALVE
W/1 WITH ONE
W/2 WITH TWO
WCN WATER CURTAIN NOZZLE
WLD WELDED
WLET WELDOLET
WN WELD NECK
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