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Breathing Apparatus

There are three main types:

Full Duration 30 - 60 Minutes

Escape Type 6 - 15 Minutes

Airline ( Air loop) Unlimited

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Breathing Apparatus

Full Duration - Positive Pressure

Main Parts CylinderBack Plate or Harness

Reducer / Regulator

Face Mask

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Breathing Apparatus

Design Features

Must pass at least 40litres of air per minute

(Theoretical average consumption)Provision for the removal of CO2

Ability to increase the air supply

Pressure Gauge to read cylinder contents

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Breathing Apparatus

Duration

Full Duration - from start up to empty

Working Duration - from start up untillow pressure warning

device operates

Safety Margin - from warning deviceoperating till empty

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Breathing Apparatus

You have a standard size (9liter)

cylinder, filled to a pressure of

180 bar.

How long is your working

duration?

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Breathing Apparatus

Working Duration =

Contents of cylinder in litres - Safety Margin40 (Average Consumption per minute)

Safety Margin = 10 minutes.

Consumption can vary from 19.7 to 132 liters per

minute.

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Breathing ApparatusContents (liter) =

Pressure (Bar) X Water Capacity (Liters)

Water Capacity is typed on the cylinder:

6.0 for a 1200 litre cylinder 8.0 for a 1600 cylinder

9.0 for a 1800 litre cylinderContents = 180(bar) X 9.0= 1620(liters)

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Breathing ApparatusWorking Duration =

Contents of cylinder in litres - Safety Margin

40

Working Duration = 1620(liters) - 10(minutes)

40 (liters/minute)

= 40.5 - 10(minutes)

= 30.5 minutes

During an emergency rescue, the consumption can be

130liters/min, resulting in a working duration of

ONLY 12.5 minutes

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Breathing ApparatusDonning Procedure Don apparatus, adjust shoulder & waste straps

Don the face mask loosely, crack open cylinder valve,

tighten and adjust face mask, open cylinder valve fully. Inhale 2-3 times, Check for positive pressure, Close

cylinder valve inhale until air is exhausted (Keep Hand on

Cylinder Valve during this operation), Check low

pressure device. Check for air tight seal Open Cylinder valve fully

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Breathing Apparatus

Escape Type Sets

These are used for escape purposes only.

Duration depends on contents of cylinderRange of 6 - 15 Minutes

Normally 10 min. 400 litres

There is no low pressure warning device.

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Breathing Apparatus

Escape Set - Donning Procedure

Fresh Air

Check Pressure Gauge

Support Set

Turn on Cylinder Valve if fitted

Don Face Mask Adjust Head Harness

Turn on Positive Pressure Switch (if fitted)

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Breathing Apparatus

Escape Set - Donning Procedure

Toxic Atmosphere

Check Pressure Gauge Turn on Cylinder Valve if fitted

Ensure Positive Pressure Switch is on

Don Face Mask Adjust Head Harness Support Set

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Breathing Apparatus

Airline Equipment

This type of Breathing Apparatus is used where

the wearer needs to work in an area for long

periods of time.

Trolley Mounted

Trailer mounted

Fixed System - Air Loop

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Breathing Apparatus

Airline Equipment

Air Supply can

be cylinders or a

fixed compressor

Drill Floor

Air Loop

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Breathing Apparatus

Search Procedure

Formulate a Plan

Work as a team (Minimum Two) Communication

Distinguishing Features

Use back of hand, shuffle feet.Is it Safe?

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Breathing Apparatus

Buddy System

Any work to be carried out in a hazardous area

must be done using the buddy system

Worker & Observer

IMPORTANT

No person should enter an area where H2S ispresent on their own

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Emergency Response

Rescue Plan for H2S Emergency

Assess the situation

Number of rescuers Location of victims

Number of victims

Other Hazards

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Emergency Response

Rescue - Assess the Situation

Gather Information

Weather

Time of Day

Assistance Required

Medical

Specialised Equipment (H2S Emergency Kit)

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Emergency Response

Rescue Other Hazards

Fire Explosion

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Emergency Response

Rescue

Don Full DurationBreathing Apparatus

Remove victim immediately to fresh air Administer medical aid

Request Medical assistant

Keep Victim Warm

Do not leave unattended

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Emergency Procedure

While working at the work site should you smell H2Sor a detection system is activated:

Dont Panic

Hold your breath Don Breathing Apparatus if available

If Not

Leave the area immediately (upwind or cross-wind) Do not attempt to rescue

Report to emergency station