Common Abbreviations used for Piping

In every field of profession, there are some abbreviations used frequently. In Piping too, there are many frequently used abbreviations that a piping professional must know. Here we are providing you a list of abbreviations that you should keep in mind while reading a Piping isometric drawing or doing fabrication and Erection work.

How abbreviations are useful in Piping?

For describing anything in the piping isometric drawing there are lots of abbreviations used frequently to understand the vision of the designer. A designer can’t type all description for specifying everything on Isometric. This will take huge work effort as well as will be time consumable. abbreviations are much helpful in the following manners:

  1. This gives a complete description of pipe fittings in fewer words. For e.g: POE x TOE has simply meant that a fitting required with “Plain one End and Threaded One End“.
  2. With help of it, communication becomes easier. For e.g.: Instead of asking “TOP of Steel”, it is much easier to ask TOS of structure.
  3. This gives you a clear understanding of what the designing person wants to describe to you about something.

Abbreviation of Piping Standard codes

Full form of Piping Code abbreviations

SL. NO.ABBREVIATIONDESCRIPTION
1ANSIAmerican National Standards Institute Inc
2APIAmerican Petrolium Institute
3ASAAmerican Standards Association
4ASMEThe American Society of Mechanical Engineers
5ASTMThe American Society for Testing and Materials
6AWWAAmerican Water Works Association
7ISIndian Standard
8JISJapanese Stadard

Abbreviation used for fittings

SL. NO.ABBREVIATIONDESCRIPTION
1AsbAsbestos (Gaskets)
2BblBarrel
3BdrBleed ring
4BfyButterfy (valve)
5BldBlind (flange)
6BldSpectacle blind (blate between flanges)
7ConcConcentric
8BlkBlack (pipe)
9BrzBronze (valve)
10BWButtweld
11ChkCheck (valve)
12CplCoupling
13CswConcentric swage
14EccEccentric
15GlbGlobe (valve)
16EllElbow
17EolElbolet
18EswEccentric swage
19EswEccentric swage
20TOLThreadolet
21SOSlip-on (flange)
22SOLSockolet
23RSRising stem (valve)
24RTEReducing tee
25Exp jtExpansion joint
26FEFlanged ends / flow element
27FemFemale (ends)
28Flg.Flange
29GskGasket
30HCHose coupling
31LOLLatrolet
32NipNipple (pipe)
33OrfOrifice
34RdcrReducer
35SwgSwage nipple
36UnUnion
37VAValve
38WOLWeldolet
SOLSockolet

Abbreviation used for Fittings Description

SL. NO.ABBREVIATIONDESCRIPTION
1BBEBevel both ends
2BEBeveled end
3BLEBevel large end
4BOEBevel one end
5BSEBevel small end
6F/FFace of flange
7FFFlat/full face
8DiaDiameter
9FSUFlat side up
10FSDFlat side down
11FlgdFlanged ends / flow element
12LRLong radius
13M&FMale and female (ends)
14NPSNominal pipe size
15NPTNominal pipe thread
16ODOutside diamter
17OS&DOver short and damage (report)
18OS&YOutside screw and yoke (valve)
19PBEPlain both ends
20PEPlain ends
21PLEPlain large end
22POEPlain one end
23PSEPlain small end
24RFRaised face
25ScrdScrewed (ends)
26SEScrewed ends
27SRShort radius, stress relieve
28SRLShort radius ell
29Thr?dThreaded
30TLEThread large end
31TOEThread one end
32TSEThread small end
33WEWeld end

Miscellaneous abbreviation frequently used in Piping

Piping Abbreviation used for Measurements

SL. NO.ABBREVIATIONDESCRIPTION
1CmCentimeter
2CuCubic
3DESDouble extra strong
4DimDimension
5Ea.Each
6Ex.hvyExtra heavy
7Ex.stgExtra strong
8FtFeet/foot
9GalGallon
10HvyHeavy
11IDInside diamter
12IDInside diamter
13IPSIron pipe size
14Lb (s). #Pound (s) # symbol for pounds
15LgLength, long, level gauge
16MMeter/one thousand
17MMMillimeter
18No or #Number
19OzOunce
20PcPiece (mark for spool pieces)
21PrPair of items
22psiPounds per square inch
23psigPounts-force suqre inch, guage
24QtyQuantity
25RPMRevolutions per minute
26S/40Schedule 40 (of pipe or fittings)
27SchSchedule (of pipe or fittings)
28SqSquare feet, yards etc.
29VolVolume
30WdWidth/wide
31XSExtra strong
32XXSDouble extra strong
33YdYard