Coordination System..
Mechanical symbols on P&ID
Spool Piece Straight

Spool Piece 90°
Strainer Y-type
Flange Set / Spool, Isolating
Primary Element, Venturi type

Bursting Disc
Joint Butt Weld
Joint Flanged
Joint Screwed
Joint Socket Weld
Joint Swivel

Spectacle Blind, Normally Open

Spectacle Blind, Normally Closed
Ring Spacer
Spade Blind

Hamer Blind
Steam Trap

Steam Trap with Built-in Strainer
Expansion Loop
Sleeve Extension
Expansion / Contraction Bellow
Flexible Hose Flanged
Restriction Orifice

Vent

Drain

Sight Glass

Level Gauge

Revision Cloud
Revision Triangle

Silencer

Emergency Shower

Open Vent

Syphon Drain

Liquid Seal, Open

Liquid Seal, Closed

Steam Trap with Integral Check Valve

Steam Trap Assembly

Slide Valve, Hand-Operated

Slide Valve, Remoted-Operated