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Type 27 LPG cylinder valve and revision of AS/NZS 5601.1 and AS/NZS 5601.2

Standards Australia has published two public comment drafts relating to AS/NZS 5601.1 and AS/NZS 5601.2.

A public comment draft amendment 4 for AS/NZS 5601.1 was published on 14 April 2020 and a second public comment draft for a revision of AS/NZS 5601.2 was published on the same day.

Both public comment drafts include references to the proposed new LPG cylinder valve connection, which will replace the current Type 21 (POL) LPG cylinder valve connection for leisure cylinders i.e. less than 10kg.

Some gasfitters may have seen a previous article on the proposed new LPG cylinder valve in our Summer 2018/2019 edition of the energysafe. (See pg. 10)

Main features of the new LPG cylinder valve and matching connection

  • The cylinder valve incorporates a check valve that will only enable gas to flow when a gas tight connection is made.
  • The connection is a large diameter right-handed thread that is able to be made without the use of tools.
  • All perishable rubber seals are located within the body of the gas valve. Unlike the Type 21 POL connection the new appliance or pigtail connection does not include rubber o-rings or bull-nose seals, which are often damaged or are missing.
  • The connection incorporates a thermal fuse that will melt when exposed to heat. This allows the internal check valve to close and shut off gas flow in the event the connection is exposed to a fire.
  • The new valve is compatible with existing appliances that use the Type 21 connection, which will assist in the transition process.

The new LPG cylinder valve connection device is intended to be referred to as a ‘cylinder quick-connect device’ in AS/NZS 5601.1 and AS/NZS 5601.2.

In addition to the references to the new LPG cylinder valve connection, the revision of AS/NZS 5601.2 also includes the following proposed changes.

  • Introduction of definitions for ‘controlled area’, ‘domestic caravan’, ‘encapsulated’, ‘ignition source’, ‘non-sparking by nature’, ‘quick-connect device (cylinder)’ and ‘toughened safety glass’.
  • Prohibition of in-situ fill cylinders on caravans.
  • Introduction of requirement for orientation of cylinders on caravan drawbars to allow for unobstructed relief of cylinder pressure.
  • Introduction of a ‘controlled area’ for clearances from LPG cylinders to ignition sources on caravan drawbars, and clarification on the type of electrical equipment that can be used within this area.
  • New requirement for safety shut-off valves in LPG cylinder compartments.
  • New clearance height between cookers and rangehoods to ensure consistency with clearance requirements in the Australian standard for rangehoods.
  • Requirement for CO detectors to conform to internationally recognised standards where used in boats.
  • Additional requirements for thermal protection of combustible surfaces.
  • New pipe sizing tables allowing for more flow capacity.
  • Additional considerations for gas leakage tests for appliances with interlocks.
  • New appendix on purging.
  • References to a cylinder quick-connect device.

The public comment period closes on 16 June 2020. The draft standards can be downloaded and public comment can be submitted via Standards Australia.