{widearea-relyon class=”dkblue” margintop=”0px” marginbottom=”50px” paddingtop=”0px” backgroundposition=”43% 0″ paddingbottom=”0px” image=”images/Consulting/hazarous-Area-Classification-banner.jpg” ratio=”1″} {row}{col6} {/col}{col6 class=”center text-right”}
Hazardous Area Classification (HAC)
{/col}{/row} {/widearea}
{row}{col8}
Classify clear, defensible hazardous-area zoning for flammable gas/vapour and combustible dust atmospheres.
We align the classification to the AS/NZS IEC 60079 series (e.g., AS/NZS IEC 60079.10.1) and provide practical drawings + a classification dossier that contractors can build to, and operations teams can maintain.
Key outcomes
- Remove ambiguity around where the zone starts/stops so equipment and installation requirements are unambiguous
- Define EPL requirements (Ga/Gb/Gc or Da/Db/Dc) and any special conditions of use
- Establish the compliance baseline for Management of Change (MOC) and periodic review
What we do (scope inclusions)
- Desktop review of process info (P&IDs, layouts, SDS, operating conditions) and existing HA documentation (if available)
- Site walkdown / data capture to confirm release sources, ventilation paths, bunding/drainage, and equipment placement
- Identify release sources + grades of release; evaluate ventilation effectiveness and dispersion
- Determine zone type and extent (gas/vapour: Zone 0/1/2; dust: Zone 20/21/22) and document assumptions/limitations
- Produce zone drawings and a classification report suitable for regulator/insurer/project handover
Typical deliverables
- HAC report (basis, assumptions, zone rationale, references)
- Zone drawings (CAD/PDF) with extents (and elevations/sections where required)
- Substance & release source register
- EPL requirements table for each zone + equipment requirements guidance
- Gap list / actions register (documentation gaps, plant changes, equipment issues observed)
Engagement options
- HAC Gap Assessment (desktop + targeted walkdown)
- Full HAC (walkdown + complete classification dossier)
- HAC Update / MOC Review (update drawings/assumptions after plant changes)
{/col}
{col4}
|
Call our Team about 1300 15 66 85 |
Other HADC Services
Hazardous Area Design
{/col}{/row}
Hazardous Area Classification FAQs
{toggle2 title=”Do you classify both gas/vapour and dust hazardous areas?“}
Do you classify both gas/vapour and dust hazardous areas?
Yes, gas/vapour (Zone 0/1/2) and dust (Zone 20/21/22), including sites with both hazards. We confirm zone extents and the required EPL for compliant equipment selection.
{/toggle}
{toggle2 title=”Can you work from an existing classification dossier?“}
Can you work from an existing classification dossier?
We can validate what you have, update it after changes (MOC), and issue a gap/action list where assumptions or site conditions don’t match “as-operated”.
{/toggle}
{toggle2 title=”Do you provide CAD drawings?“}
Do you provide CAD drawings?
Yes, zone drawings issued as PDF and DWG/CAD where needed. We can also mark up your existing drawings to suit your document control system.
{/toggle}
{toggle2 title=”What if our site data is incomplete?“}
What if our site data is incomplete?
That’s common. We combine available documents with a site walkdown to confirm release sources and ventilation. Any remaining unknowns are captured in a clear assumptions + information request list, so the outcome remains defensible.
{/toggle}
{toggle2 title=”How often should classification be reviewed?“}
How often should classification be reviewed?
Whenever there’s a change that could affect the hazardous atmosphere (materials, process conditions, ventilation, layout). Many clients also adopt a 3–5-year baseline review, depending on site risk and change frequency.
{/toggle}
Why RelyOn?
• Led by industry-recognised HACD engineers
• Independent, defensible engineering advice
• Deep experience across renewables, BESS, hydrogen & industrial assets
• Integrated with broader electrical safety & compliance services
Speak to our Hazardous Areas Team
www.relyonaustralia.com
1300 15 66 85
info.au@relyon.com