PROCESS AND INSTRUMENTATION DIAGRAMS STANDARD DRAFTING SYMBOLS CHART
This drawing provides a comprehensive standard drafting symbols chart for process and instrumentation diagrams. It defines symbology for line types, self-actuated regulating valves, actuators, piping valves, fittings, general instrument functions, level sensors, primary element flow rates, and piping hazardous classification levels.
Source: TS-112-Process-and-Instrument-Diagrams.pdf · page 16/27 · Drawing: 4003-00001-01 rev 1 · Components: 87 (1 equipment, 19 instrument, 27 valve, 15 line, 25 other)
Equipment (1)
| Tag |
Description |
Details |
Connects to |
| pump-1 |
PUMP DRIVEN BY A VARIABLE SPEED MOTOR |
— |
— |
Instruments (19)
| Tag |
Function (ISA 5.1) |
Description |
Details |
Connects to |
| gen-inst-1 |
— |
PILOT LIGHT |
— |
— |
| gen-inst-2 |
— |
PRESSURE SETTING BALLOON (RIGHT) |
— |
— |
| gen-inst-3 |
— |
PRESSURE SETTING BALLOON (LEFT) |
— |
— |
| gen-inst-4 |
— |
UNDEFINED INTERLOCK LOGIC |
— |
— |
| le-xxxx-1 |
— |
ULTRASONIC |
— |
— |
| le-xxxx-2 |
— |
CONDUCTIVITY PROBE |
— |
— |
| le-xxxx-3 |
— |
BALL FLOAT |
— |
— |
| flow-rate-1 |
— |
FLOW ELEMENT, ORIFICE TYPE |
— |
— |
| flow-rate-2 |
— |
FLUME |
— |
— |
| fe-xxxx-1 |
— |
FLOW ELEMENT CODE BALLOON (To be associated with Element) |
— |
— |
| flow-rate-4 |
— |
MAGNETIC FLOWMETER |
— |
— |
| flow-rate-5 |
— |
PITOT TUBE or ANNUBAR |
— |
— |
| flow-rate-6 |
— |
POSITIVE DISPLACEMENT FLOWMETER |
— |
— |
| flow-rate-7 |
— |
THERMAL MASS FLOWMETER |
— |
— |
| flow-rate-8 |
— |
TURBINE FLOWMETER |
— |
— |
| flow-rate-9 |
— |
ULTRASONIC FLOWMETER |
— |
— |
| flow-rate-10 |
— |
VARIABLE AREA FLOW INDICATOR |
— |
— |
| flow-rate-11 |
— |
VORTEX METER |
— |
— |
| flow-rate-12 |
— |
WEIR |
— |
— |
Valves (27)
| Tag |
Description |
Details |
Connects to |
| psv-1 |
GLOBE, DIAPHRAGM TYPE PRESSURE SUSTAINING VALVE |
— |
— |
| pcv-1 |
GLOBE, DIAPHRAGM TYPE PRESSURE REGULATING VALVE |
— |
— |
| prv-1 |
GLOBE, DIAPHRAGM TYPE PRESSURE RELIEF VALVE |
— |
— |
| psv-2 |
SPRING ACTUATEDPRESSURE RELIEF VALVE |
— |
— |
| psv-3 |
SPRING ACTUATED 90 DEG PRESSURE RELIEF VALVE |
— |
— |
| hocv-1 |
HOCV |
— |
— |
| hosv-1 |
HOSV |
— |
— |
| piping-valve-1 |
VALVE, ANGLE |
— |
— |
| piping-valve-2 |
VALVE, BALL |
— |
— |
| piping-valve-3 |
VALVE, BUTTERFLY |
— |
— |
| piping-valve-4 |
VALVE, DIAPHRAGM |
— |
— |
| piping-valve-5 |
VALVE, PLUG |
— |
— |
| piping-valve-6 |
VALVE, GAS RELEASE |
— |
— |
| piping-valve-7 |
VALVE, GATE |
— |
— |
| piping-valve-8 |
VALVE, GENERAL |
— |
— |
| piping-valve-9 |
VALVE, GLOBE |
— |
— |
| piping-valve-10 |
HYDRANT |
— |
— |
| piping-valve-11 |
VALVE, KNIFE GATE |
— |
— |
| piping-valve-12 |
VALVE, NEEDLE |
— |
— |
| piping-valve-13 |
VALVE, NON RETURN |
— |
— |
| piping-valve-14 |
VALVE, BACKFLOW PREVENTION DEVICE |
— |
— |
| piping-valve-15 |
PENSTOCK |
— |
— |
| piping-valve-16 |
VALVE, PINCH |
— |
— |
| piping-valve-17 |
VALVE, PLUG |
— |
— |
| piping-valve-18 |
STOP PLATE |
— |
— |
| piping-valve-19 |
STOPLOG |
— |
— |
| piping-valve-20 |
VALVE, 3 WAY |
— |
— |
Lines (15)
| Tag |
Description |
Details |
Connects to |
| line-type-1 |
MAIN PROCESS LINES |
— |
— |
| line-type-2 |
SECONDARY PROCESS LINE |
— |
— |
| line-type-3 |
COVERED CHANNEL |
— |
— |
| line-type-4 |
OPEN CHANNEL |
— |
— |
| line-type-5 |
INSTRUMENT SUPPLY OR CONNECTION TO PROCESS |
— |
— |
| line-type-6 |
UNDEFINED SIGNAL |
— |
— |
| line-type-7 |
PNEUMATIC SIGNAL |
— |
— |
| line-type-8 |
ELECTRICAL SIGNAL |
— |
— |
| line-type-9 |
ELECTRICAL SIGNAL (DIGITAL) |
— |
— |
| line-type-10 |
SOFTWARE LINK |
— |
— |
| line-type-11 |
TERMINATION POINT |
— |
— |
| line-type-12 |
IN LEFT/OUT RIGHT |
— |
— |
| line-type-13 |
OUT LEFT/IN RIGHT |
— |
— |
| line-type-14 |
LIQUID FLOW ARROW |
— |
— |
| line-type-15 |
CONNECTION (OF LINES) |
— |
— |
Other (25)
| Tag |
Description |
Details |
Connects to |
| actuator-1 |
DIAPHRAGM |
— |
— |
| actuator-2 |
DIAPHRAGM, PRESSURE BALANCED |
— |
— |
| actuator-3 |
FLOAT |
— |
— |
| actuator-4 |
HAND ACTUATED OR HANDWHEEL |
— |
— |
| actuator-5 |
PISTON |
— |
— |
| actuator-6 |
PISTON ACTUATOR WITH POSITIONER OR POSITION SWITCHES |
— |
— |
| actuator-7 |
POSITIONER SHOWN ON ACTUATOR |
— |
— |
| actuator-8 |
POSITIONER TAG |
— |
— |
| actuator-9 |
ROTARY MOTOR (MAY BE ELECTRIC HYDRAULIC or PNEUMATIC) |
— |
— |
| actuator-10 |
SOLENOID |
— |
— |
| actuator-11 |
SPRING - FOR PRESSURE RELIEF OR SAFETY VALVE ONLY |
— |
— |
| actuator-12 |
WEIGHT |
— |
— |
| fitting-1 |
CAP |
— |
— |
| fitting-2 |
BLIND FLANGE |
— |
— |
| fitting-3 |
FLANGE JOINT |
— |
— |
| fitting-4 |
FLEXIBLE COUPLING |
— |
— |
| fitting-5 |
FLEXIBLE HOSE |
— |
— |
| fitting-6 |
HOSE COUPLING |
— |
— |
| fitting-7 |
NOZZLE |
— |
— |
| fitting-8 |
REDUCER - CONCENTRIC |
— |
— |
| fitting-9 |
REDUCER - FLAT BOTTOM |
— |
— |
| fitting-10 |
REDUCER - FLAT TOP |
— |
— |
| haz-level-1 |
HAZ LEVEL (AVERAGE) eg. CHLORINE, CAUSTIC |
— |
— |
| haz-level-2 |
HAZ LEVEL (LOW) eg. POLYMER, HIGH PRESSURE |
— |
— |
| haz-level-3 |
HAZ LEVEL (NEGLIGIBLE) eg. WATER |
— |
— |
Notes on drawing
- NOTE: THIS DRAWING SHOWS THE STANDARD SYMBOLS TO BE USED WHEN PRODUCING P & ID'S FOR SA WATER AND ON ALL SA WATER PROJECTS. REFER TO TS112