Hazardous Areas Blog

Site Data

The following Site Data is required:

• Site Owner,
• Site Address.

Environment

The following environmental data is required:

• Historical Maximum and Minimum Temperatures,
• Height above Sea Level,
• Ventilation, in accordance with AS/NZS 60079.10.2, for all aspects of the plant to be studied:
  • Natural or Artificial Ventilation,
  • Degree of Ventilation,
  • Availability of Ventilation.

Technical Documentation Required

A Hazardous Area Classification study for a facility with flammable gas and vapour releases requires:

• A defined Scope of Works, reviewed by and agreed with:
• What Standard or Code is to be applied to the Hazardous Area Classification study,
• Determine what Methodology or Methodologies the client wishes to be used in the study:
  • Source of Release by Example,
  • Risk Assessment for Equipment Protection Levels (EPLs).
• Piping and Instrumentation Diagrams (P&ID) for the areas of the study,
• Process Flow Diagrams (PFD) for the areas of the study, which align with the P&IDs above,
• Safety Releases which may operate if there is an ignition within the plant,
• Mechanical General Arrangement drawings for all the vessels within the scope of the study,
• Photographs of all the vessels, pits and drains within the scope of the study, including:
  • 360 degree views of each vessel,
  • “Close-up” photographs of each entry, exit and entry into the vessel,
  • Photographs of any marking or identifiers on the vessel.
  • Pits, sumps, vessels, drains and Oily Water Separators.
• Safety Data Sheets (SDS) for all the materials used within or produced by the process,
• The following combustion parameters for the Combustible Dusts being handled:
  •  LEL in g/m³
  • Median Particle Size (μm)
  • Cloud Ignition Temperature
  • Layer Ignition Temperature
• Any previous Risk Assessments for the plant (to assist with EPL nominations),
• Copies of all previous studies conducted, including hazardous area classification drawings,
• Plan and Elevation drawings of the plant.

This material is produced by HAZ. The information is of a general nature only and should not be relied upon.  Each set of circumstances associated with compliance of hazardous areas and Type B compliance is unique and expert advice on your particular circumstances should be sought.  HAZ accepts no liability for any reliance on the information published on this website.