Coordination System..
Mechanical symbols on P&ID
Spool Piece Straight
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms2.gif)
Spool Piece 90°
Strainer Y-type
Flange Set / Spool, Isolating
Primary Element, Venturi type
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms6.gif)
Bursting Disc
Joint Butt Weld
Joint Flanged
Joint Screwed
Joint Socket Weld
Joint Swivel
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms12.gif)
Spectacle Blind, Normally Open
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms13.gif)
Spectacle Blind, Normally Closed
Ring Spacer
Spade Blind
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms16.gif)
Hamer Blind
Steam Trap
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms18.gif)
Steam Trap with Built-in Strainer
Expansion Loop
Sleeve Extension
Expansion / Contraction Bellow
Flexible Hose Flanged
Restriction Orifice
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms24.gif)
Vent
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms25.gif)
Drain
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms26.gif)
Sight Glass
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms27.gif)
Level Gauge
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms28.gif)
Revision Cloud
Revision Triangle
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms30.gif)
Silencer
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms31.gif)
Emergency Shower
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms32.gif)
Open Vent
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms33.gif)
Syphon Drain
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms34.gif)
Liquid Seal, Open
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms35.gif)
Liquid Seal, Closed
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms36.gif)
Steam Trap with Integral Check Valve
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms37.gif)
Steam Trap Assembly
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms38.gif)
Slide Valve, Hand-Operated
![Mechanical symbol on PiD](https://www.wermac.org/documents/symbols/ms39.gif)
Slide Valve, Remoted-Operated