---
title: "PROCESS AND INSTRUMENTATION DIAGRAMS STANDARD DRAFTING SYMBOLS CHART — asset register"
doc_type: pid-asset-register
drawing_number: "4003-00001-01"
revision: "1"
source: "TS-112-Process-and-Instrument-Diagrams.pdf (page 16 of 27)"
tags: [line-type-1, line-type-2, line-type-3, line-type-4, line-type-5, line-type-6, line-type-7, line-type-8, line-type-9, line-type-10, line-type-11, line-type-12, line-type-13, line-type-14, line-type-15, psv-1, pcv-1, prv-1, psv-2, psv-3]
summary: "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."
---

# 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