Introduction
- Last UpdatedJan 19, 2026
- 2 minute read
This appendix lists the symbol key (that means, the SKEY text attribute) and the plotted symbol used to identify each type of component on isometric drawings. There is a section for each generic type. The sections are in alphabetic order of generic type:
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BEND (see ELBOw) |
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CAP |
See CAP Symbol Keys. |
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CLOSure |
See CLOS Symbol Keys. |
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COUPling |
See COUP Symbol Keys. |
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CROSs |
See CROS Symbol Keys. |
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ELBOw |
|
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FBLInd (Blind Flange) |
See FBLI Symbol Keys. |
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FILTer |
See FILT Symbol Keys. |
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FLANge |
See FLAN Symbol Keys. |
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FTUBe (Fixed-length Tube) |
See FTUB Symbol Keys. |
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INSTrument |
See INST Symbol Keys. |
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LJSEnd (Lap Joint, Stub End) |
See LJSE Symbol Keys. |
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OLET (see TEE) |
|
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PCOMponent (Pipe Component) |
See PCOM Symbol Keys |
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REDUcer |
See REDU Symbol Keys. |
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SHU |
See SHU Symbol Keys. |
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TEE |
|
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TRAP |
See TRAP Symbol Keys. |
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UNIOn |
See UNIO Symbol Keys. |
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UNIVersal |
See UNIVERSAL Symbol Key. |
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VALVe |
See VALV Symbol Keys. |
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VENT |
See VENT Symbol Keys. |
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VFWAy (Four-way Valve) |
See VFWA Symbol Keys. |
|
VTWAy (Three-way valve) |
See VTWA Symbol Keys. |
|
WELD |
See WELD Symbol Keys. |
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FLOR (Pipe through floor) |
Symbol Key Reference Index is an alphabetical list of symbol keys cross-referenced to the generic types of the components to which they refer.The following information is given for each SKEY:
|
Component description |
The actual component description |
|
SKEY |
A four-letter identifier |
|
Plotted symbol |
The symbol plotted on isometrics, plus dimensions (in mm) |
|
P-points |
The position and direction of the P-points with respect to the plotted symbol. P-points needed to specify components fully are shown against the symbols. P-points which are optional are not shown, but their effects are explained in the notes when appropriate. |
|
Notes |
The numbers in the right-hand column refer to the notes at the end of each section. |