Pressure Vessel Regulations in Australia: What are the Mandatory Requirements?

December 2, 2019

In order to safeguard the Australian populace, pressure vessels in our nation are backed by a comprehensively researched set of site-protecting guidelines. In reality, these are more than guiding principles. They're legislative documents, lawfully conceived and instituted directives that must be heeded. By the designers, by the site managers and employees, by all maintenance contractors, too, these regulations are written in stone as mandatory requirements.

Australia's Pressure Vessel Requirements

Every nation creates its own pressure vessel regulations. There are also internationally agreed-upon rulings, plus regional variations that tend to parallel one another. Staying local, let's focus on Australia's mandatory requirements. Before anything else, we'll define some of the statutory ordinances that are enforced on this great southern continent. Protecting life and property, the AS 1210 standards dominate design codes in Western Australia. For the rest of the country, the AS 4343 regulations add a labelled layer of codified hazard protection to each and every boiler and pressure equipment container. Next up, we'll use this opportunity to define some of the dangers that come into play after the fabrication phase is concluded.

Fabrication Phase Regulation Compliance

Failure to comply with Australia's pressure vessel regulations could result in a nasty fine. Would that this was the worst possible consequence that could befall a facility, but that's simply not the case. Worse than any fine, a pressurized vessel could fail catastrophically. Poisonous fumes could leak into an environment or harm a nearby community. The failure might make itself known in a far more destructive manner, perhaps by causing a highly destructive explosion. By assigning a hazard level, as mapped out in the AS 4343 regulations, designers and manufacturers apply slightly different fabrication methods. Ultimately, more resilient and reliable weld techniques and metal rolling facilities are utilized if that hazard level is high. The following fluid conditions decide which hazard level is applied:

  • Fluid causticity
  • Volumetric content
  • Pressure and temperature constants
  • The likelihood of transient state changes
  • Site location


For that last bulleted entry, an offshore pressure vessel will obviously require one set of protective design constraint. Onshore, close to a populated area, a contrasting, probably high-priority design mode will be required to protect a smaller safety envelope.

At the end of the day, when a pressure vessel is designed, inspected and commissioned, it's assigned a Hazard level, one that complies with the AS 4343 regulations. This rating is registered with a state authority, with Worksafe WA, Safework SA, or some other authority that can command the codes required to guarantee compliance with any and all mandatory requirements. Installed and tested with all fittings, in-service AS 3788 maintenance programs keep that ordinance observing posture on high alert, regardless of a pressure vessel's hazard level.

Contact Details

Fusion - Weld Engineering Pty Ltd
ABN 98 068 987619

1865 Frankston Flinders Road,
Hastings, VIC 3915

Ph: (03) 5909 8218

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