---
title: "PROCESS AND INSTRUMENTATION DIAGRAMS STANDARD DRAFTING SYMBOLS CHART SA WATER STANDARDS — asset register"
doc_type: pid-asset-register
drawing_number: "4003-00001"
revision: "01"
source: "TS-112-Process-and-Instrument-Diagrams.pdf (page 16 of 27)"
tags: [PSV-sust, PCV-reg, PRV-relief, PSV-spring, HOCV, HOSV, LE-ultrasonic, LE-conductivity, LE-float, SIC-VSD-Pump, FE-flow-element, HAZ-LEVEL-B, HAZ-LEVEL-C, HAZ-LEVEL-E]
summary: "This drawing is a standard legend sheet showing symbols and codes for line types, self-actuated regulating valves, actuators, piping valves, fittings, level sensors, and flow rates used on SA Water P&ID drawings."
---

# PROCESS AND INSTRUMENTATION DIAGRAMS STANDARD DRAFTING SYMBOLS CHART SA WATER STANDARDS

This drawing is a standard legend sheet showing symbols and codes for line types, self-actuated regulating valves, actuators, piping valves, fittings, level sensors, and flow rates used on SA Water P&ID drawings.

**Source:** TS-112-Process-and-Instrument-Diagrams.pdf · page 16/27 · **Drawing:** 4003-00001 rev 01 · **Components:** 14 (1 equipment, 4 instrument, 6 valve, 3 other)

## Equipment (1)

| Tag | Description | Details | Connects to |
|---|---|---|---|
| SIC-VSD-Pump | Pump Driven by a Variable Speed Motor | Variable speed drive centrifugal pump unit with motor (M) | — |

## Instruments (4)

| Tag | Function (ISA 5.1) | Description | Details | Connects to |
|---|---|---|---|---|
| LE-ultrasonic | LE = Level Element | Ultrasonic Level Sensor | Ultrasonic level element/sensor symbol | — |
| LE-conductivity | LE = Level Element | Conductivity Probe Level Sensor | Conductivity probe type level sensor | — |
| LE-float | LE = Level Element | Ball Float Level Sensor | Ball float type level element | — |
| FE-flow-element | FE = Flow Element | Flow Element Code Balloon | To be associated with flow element sensor | — |

## Valves (6)

| Tag | Description | Details | Connects to |
|---|---|---|---|
| PSV-sust | Globe Diaphragm Type Pressure Sustaining Valve | Self-actuated regulating valve, globe diaphragm type | — |
| PCV-reg | Globe Diaphragm Type Pressure Regulating Valve | Self-actuated pressure regulating valve | — |
| PRV-relief | Globe, Diaphragm Type Pressure Relief Valve | Globe, diaphragm type pressure relief valve | — |
| PSV-spring | Spring Actuated Pressure Relief Valve | Spring actuated pressure relief valve | — |
| HOCV | Hydraulically Operated Control Valve | Contains hydraulic actuator and pressure tapping points | — |
| HOSV | Hydraulically Operated Solenoid Valve | Contains solenoid pilot control | — |

## Other (3)

| Tag | Description | Details | Connects to |
|---|---|---|---|
| HAZ-LEVEL-B | Hazard Level B (Average) | Piping hazardous classification level B (eg. Chlorine, Caustic) | — |
| HAZ-LEVEL-C | Hazard Level C (Low) | Piping hazardous classification level C (eg. Polymer, High Pressure) | — |
| HAZ-LEVEL-E | Hazard Level E (Negligible) | Piping hazardous classification level E (eg. Water) | — |

## Notes on drawing

- 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