Drawing Abbreviations

Abbreviations commonly found in drawings are shown below:

A

• ACTR - acturator
• AG - above ground
• AG - above grade
• ALLOW - allowance
• AB - anchor bolt
• APPROX - approximate
• AVG - average

B

• BBE - bevel both ends
• BBL - barrel
• BC - begin curve
• BC - bolt circle
• BE - bevel end
• BE - buttweld end
• BF - blind flange
• BFG - bevel for weld
• BFW - boiler feed water
• BG - below ground
• BG - below grade
• BL - blower
• BLD - blind
• BLDG - building
• BLE - bevel one end
• BLR - boiler
• BM - bench mark
• BOC - bottom of concrete
• BOL - bottom of line
• BOP - bottom of pipe
• BOP - blow out preventer
• BOT - bottom
• BSE - bevel small end
• BTFLV - butterfly valve
• BV - ball valve
• BW - butt weld or buttweld
• BWF - butt weld fitting or buttweld fitting

C

• C-C - center to center
• CA - corrosion allowance
• CB - catch basin
• CB - compact body
• CCC - cold cut and weld
• CE - consulting engineer
• CG - casing gas
• CHE - chemical engineer
• CHEM - chemical
• CI - cast iron
• CL - centerline
• CMP - corrugated metal pipe
• COL - column
• CP - control panel
• CPLG - coupling
• CPVC - chlorinated polyvinyl chloride
• CR - control room
• CRSN - corrosion
• CS - carbon steel
• CS - cast steel
• CTR - center
• CV - check valve
• CW - continous weld

D

• DI - ductile iron
• DIP - ductile iron pipe
• DR - drain
• DSAW - double sumberged arc weld
• DWG - drawing

E

• EC - end curve
• EE - electrical engineer
• EI - electronic interface
• ENCL - enclosure
• EOP - end of pipe
• ELEC - electric
• ELECDR - electric drive
• ELECT - electrical
• ELECTC - electronic control
• ELEK - electronic
• ELMCH - electromechanical
• EMD - electric power drive
• ER - electrical resistance
• ERW - electric resistance weld
• ES - electronic switch
• EVM - electronic voltmeter
• EW - each way
• EW - electric weld
• EXPF - expander flange

F

• F-F - face to face
• FB - full body
• FBF - full barrel flange
• FC - fail close
• FCS - forged carbon steel
• FDN - foundation
• FF -  flat face
• FG - fuel gas
• FLG - flange
• FLTR - filter
• FLTR - filtration
• FND - foundation
• FO - fail open
• FOB - flat on bottom
• FOE - flange one end
• FOT - flat on top
• FPT - female pipe thread
• FST - forged steel
• FSTNR - fastener
• FTG - fitting
• FW - field weld
• FW - fillet weld

G

• GALV - galvanizeed
• GLV - globe valve
• GND - ground
• GR - grade
• GSKT - gasket
• GV - gate valve

H

• HACR - Heating, Air Conditioning and Refrigeration
• HBF - heavy barrel flange
• HE - head
• HE - heat exchanger
• HEX - heat exchanger
• HO - hot oil
• HVAC - Heating, Ventilation and Air Conditioning
• HVACR - Heating, Ventilation, Air Conditioning and Refrigeration
• HW - hot water

I

• INSUL - insulate
• INSUL - insulation

J

• JB - junction box

L

• LACT - lease automatic custody transfer
• LC - locked closed
• LDR - ladder
• LM - list of materials
• LJF - lap joint flange
• LO - locked open
• LO - lube oil
• LP - low pressure
• LR - long radius
• LWNF - long weld neck flange

M

• MATL - material
• MB - machine bolt
• ME - mechanical engineer
• MECH - mechanical
• MH - manhole
• MI - malleable iron
• MIN - minimum
• MJ - mechanical joint
• ML - material list
• MK - mark
• MW - manway

N

• NC - normally closed
• NO - normally open
• NOM - normal
• NTS - not to scale

O

• OC - on center
• OD outside diameter
• OR - outside radius
• ORFF - orifice flange
• OUT - outlet

P

• PBE - plain both ends
• PD - pressure drain
• PE - plane end
• PE - professional engineer
• PG - produced gas
• PL - plate
• PNL - panel
• PO - produced oil
• PO - pump out
• POC - pump of controller
• POC - point of connection
• POE - plain one end
• PRV - pressure relief valve
• PS - pipe support
• PT - point
• PV - plug valve
• PV - pressure vessel
• PVC - polyvinyl chloride

R

• RAD - radius
• RE - registered engineer
• RF - raised face
• REDCF - reducing flange
• REINF - reinforcing
• REPAD - reinforcing pad
• REV - revision
• RF - raised face
• RTJ - ring type joint
• RTJF - ring type joint flange
• RV - relief valve

S

• SAF - safety
• SAW - submerged arc weld
• SCHED - schedule
• SCR - screw
• SCR'D - screwed
• SE - safety engineer
• SE - system engineer
• SECT - section
• SKT - socket
• SMLS - seamless
• SOC - socket
• SOF - slip-on flange
• SP - spare
• SR - short radius
• SRPT - support
• SS - stainless steel
• STD - standard
• SUCT - suction
• SW - salt water
• SW - socket weld
• SWF - socket weld fitting
• SWF - socket weld flange
• SYS - system

T

• TBE - thread both end
• THRD - threaded
• THRDF - threaded flange
• TK - tank
• TOC - top of concrete
• TE - thread end
• TLE - thread large end
• TO - threads only
• TOE - thread on end
• TOP - top of pipe
• TOS - top of steel
• TOS - top of steel
• TP - tie in point
• TPI - threads per inch
• TRHF - threaded flange
• TSE - thread small end
• TURB - turbine
• TW - thermowell

V

• V - valve
• V - vessel
• VAC - vacuum
• VERT - vertical
• VSL - vessel

W

• WLD - welded
• WLDR - welder
• WLDS - weldess
• WNF - weld neck flange
• WT - weight
• WW - waste water

X

• XFMR - transformer