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Distribution System, Supply Quality and Measurement of LPG

Distribution System Safety

Q. What is the best way to store and transport LPG cylinders?

A. The transport by land of hazardous substances such as LPG in quantity is controlled by the Land Transport Safety Authority. However for a consumer, moving small quantities, the cylinders must be stored and transported in an upright position.


Q. How do I know that my gas cylinder is still safe to use?

A. Never use damaged or corroded cylinders – this can lead to leaks and fires.  Check cylinders for the date stamp.  By law, cylinders must be tested every ten years.  If you see damage or rust, don't use the cylinder – take it to a supplier.


Supply Quality

Q. Are there any differences between LPG and natural gas?

A. Yes.  LPG is heavier than air and has higher energy content for the same volume.  Also, LPG composition can vary more than natural gas.


Q. Does the chemical composition of LPG change, and does this create safety or efficiency problems for me?

A. The composition of both LPG and natural gas can change, but appliances are generally tested with gases representing a range of compositions that they can be exposed to.  Energy Safety monitors this quality to ensure the chemical composition does not go beyond acceptable safety limits.

The heat output and efficiency of LPG appliances may change as the heating value of the fuel gases (propane and butane) changes during depletion of the cylinder.


Q. How important is supply pressure for ensuring efficient use?

A. Supply pressure is important both for safety and efficient use.  The supply pressure is critical in design of combustion systems and low or high pressures could lead to incomplete combustion, or other hazard.



Q. Why are gas cylinder refills measured by weight?

A. Gas refills are measured by weight, as this is the most practical and cost-effective way of measuring the amount of LPG in liquid form.


Last updated 27 April 2012
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