Type B Gas Appliance Design

Type B Gas Appliance Design

A Type B gas appliance is an appliance, with gas consumption in excess of 10 MJ/hr, for which a certification scheme does not exist. This incorporates all items downstream of and including the appliance manual shut-off valve.

Without a clear understanding and experience, the process and legislation are difficult to navigate, open to interpretation and in some cases contradictory. Because of this, the cost associated can be significant if the process is not managed.

Bluefield has been able to implement the standards and legislation practically and demonstrate that compliance with the legislation can be easily done.

type b gas appliance design

Some key points to remember:

  • The gas pipework to the appliance is considered Type A gas works, (Type A Gas Work Licence)
  • The battery limits of a Type B gas appliance will be specified in the Technical submission
  • A technical submission is required for every device
  • If the Type B gas appliance equipment is not being changed our like for like then the technical submission needs to be re-approved by the designer and approval authority
  • s733 is required for every Type B gas appliance
  • If the Type B gas appliance is under an operating plant then s697 is required if it doesn’t then s734 is required
  • When alterations or modifications are done on an approved Type B gas appliance a new approval is required or at a minimum reassessed
  • If using un-odourised gas then a un-odourised risk assessment is required by an approved person
  • When an appliance is moved from one location to another it needs to be re-approved
  • Although exempt in AS/NZS 60079.10.1, if the Type B gas appliance is installed within a hazardous area it needs to comply with AS/NZS60079 series.
  • The relevant legislation nominates AS 3814 is a ‘prescribed standard’ where compliance is mandatory

The results of non-compliance has many aspects and each business is impacted in different ways;

  • Safety, non-compliant equipment can be dangerous. For the hazard to be eliminated it needs to be identified and managed
  • Cost, reactive compliance maintenance tasks and campaigns are expensive and not sustainable
  • Cost, rework through technical submission rejection or modification can easily lead to considerable hours burnt
  • Time, the average time associated with meeting the Type B requirements is not sustainable for any business and the problem is compounded with medium to large fleets of equipment
  • Lost time production, Non-compliant equipment can be defected by the regulators until compliance is achieved

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