Mechanical symbols for Isometric drawings

Mechanical symbols for Isometric drawings

Image Fittings Butt weld
Symbol		 Socket Weld
Symbol		 Threaded
Symbol		 Fittings Image
Butt welded Elbow Elbow 90° Butt weld Elbow 90° symbol Socket Weld Elbow 90° symbol Threaded Elbow 90° symbol Elbow 90° Socket Weld Elbow 90°
Butt welded Elbow Elbow 45° Butt weld Elbow 45° symbol Socket Weld Elbow 45° symbol Threaded Elbow 45° symbol Elbow 45° Threaded Elbow 45°
Butt welded Tee Tee equal Butt weld Tee equal symbol Socket Weld Tee equal symbol Threaded Tee equal symbol Tee equal Socket Weld Tee equal
Butt welded Tee Tee reducing Butt weld Tee reducing symbol Socket Weld Tee reducing symbol Threaded Tee reducing symbol Tee reducing Socket Weld reducing Tee
Butt welded Cap Cap Butt weld Cap symbol Socket Weld Cap symbol Threaded Cap symbol Cap Cap threaded
Butt welded concentric reducer Reducer concentric Butt weld Reducer concentric symbol ··· ··· Reducer concentric ···
Butt welded eccentric reducer Reducer eccentic Butt weld Reducer eccentic symbol ··· ··· Reducer eccentic ···
Image Fittings Butt weld
Symbol		 Socket Weld
Symbol		 Threaded
Symbol		 Fittings Image


Flanges Welding Neck Socket Weld Threaded Slip-On Lap-Joint Blind Flanges
Symbol Welding Neck flange symbol Socket Weld flange symbol Threaded flange symbol Slip-On flange symbol Lap-Joint flange symbol Blind flange symbol Symbol
Image Welding Neck flange Socket Weld flange Threaded flange Slip-On flange Lap-Joint flange Blind flange Image
Flanges Welding Neck Socket Weld Threaded Slip-On Lap-Joint Blind Flanges


Image Valves Butt weld
Symbol		 Flanged
Symbol		 Socket or
Threaded Symbol		 Valves Image
Gate Valve flanged Gate Butt welded Gate Valve symbol Flanged Gate Valve symbol Socket Weld and Threaded Gate Valve symbol Gate Gate Valve Socket Weld
Globe Valve butt weld ends Globe Butt welded Globe Valve symbol Flanged Globe Valve symbol Socket Weld and Threaded Globe Valve symbol Globe Globe Valve flanged
Ball Valve flanged Ball Butt welded Ball Valve symbol Flanged Ball Valve symbol Socket Weld and Threaded Ball Valve symbol Ball Ball Valve threaded
Plug Valve flanged Plug Butt welded Plug Valve symbol Flanged Plug Valve symbol Socket Weld and Threaded Plug Valve symbol Plug Plug Valve butt weld ends
Butterfly Valve butt weld ends Butterfly Butt welded Butterfly Valve symbol Flanged Butterfly Valve symbol ··· Butterfly Butterfly Valve Wafer type
Needle Valve threaded Needle Butt welded Needle Valve symbol Flanged Needle Valve symbol Socket Weld and Threaded Needle Valve symbol Needle Needle Valve flanged
Diaphragm Valve flanged Diaphragm ··· Flanged Diaphragm Valve symbol Socket Weld and Threaded Diaphragm Valve symbol Diaphragm Diaphragm Valve threaded
Y-type Globe Valve flanged Y-type Butt welded Y-type Valve symbol Flanged Y-type Valve symbol Socket Weld and Threaded Y-type Valve symbol Y-type Y-type Globe Valve threaded
3-way Valve flanged Three-way Butt welded Three-way Valve symbol Flanged Three-way Valve symbol Socket Weld and Threaded Three-way Valve symbol Three-way 3-way Valve threaded
Check Valve flanged Check Butt welded Check Valve symbol Flanged Check Valve symbol Socket Weld and Threaded Check Valve symbol Check Check Valve Socket Weld
Bottom Valve Bottom ··· Flanged Bottom Valve symbol ··· Bottom Bottom Valve
Relief Valve Relief ··· Flanged Relief Valve symbol ··· Relief Relief Valve
Control Valve straight Control
straight		 ··· Flanged Control straight Valve symbol ··· Control
straight		 Control Valve straight
Control Valve angle Control
angle		 ··· Flanged Control angle Valve symbol ··· Control
angle		 Control Valve angle
Image Valves Butt weld
Symbol		 Flanged
Symbol		 Socket or
Threaded Symbol		 Valves Image


Miscellaneous Symbol Image Miscellaneous
Branch outlet
Weldolet®		 Branch outlet - Weldolet® symbol Branch outlet - Weldolet® symbol Branch outlet
Weldolet®
Branch outlet
Nipolet®		 Branch outlet - Nipolet® symbol Branch outlet - Nipolet® symbol Branch outlet
Nipolet®
Flanged branch outlet
Flangolet		 Flanged branch outlet - Flangolet symbol Flanged branch outlet - Flangolet Flanged branch outlet
Flangolet
Spade Spade symbol Spade Spade
Spectacle blind Spectacle blind symbol Spectacle blind Spectacle blind
Hammer blind Hammer blind symbol Hammer blind Hammer blind
Spacer Spacer symbol Spacer Spacer
Restriction orifice Restriction orifice symbol Restriction orifice Restriction orifice
Field Weld Field Weld symbol Field Weld Field Weld
Butt weld
Butt weld Butt weld symbol
Pipe to pipe
connection		 Pipe to pipe connection symbol Pipe to pipe connection Pipe to pipe
connection
Pipe bend
with special radius		 Pipe bend with special radius symbol Pipe bend with special radius Pipe bend
with special radius
Sight glass Sight glass symbol Sight glass Sight glass
Direction of
hand wheel / wrench		 Direction of hand wheel / wrench symbol Direction of hand wheel / wrench Hand wheel
Y-type strainer Y-type strainer symbol Y-type strainer Y-type strainer
Conical strainer Conical strainer symbol Conical strainer Conical strainer
Conical strainer
built-in		 Conical strainer built-in symbol
Orifice assembly (typical)
showing position of taps		 Symbols of orifice assembly (typical) showing position of taps Orifice assembly Orifice assembly
Meter run
orifice assembly (typical)
flanged / butt weld		 Symbol of meter run orifice assembly (typical) flanged / butt weld Meter run Meter run
Miscellaneous Symbol Image Miscellaneous

Note: Symbols are shown in black lines. Lighter lines show connected pipe, and are not parts of the symbols.



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last updated October 27, 2025 1:52 PM