Gas supply incidents
There were 211 gas supply incidents recorded during the reporting period from 2005/06 to 2014/15. In contrast to gas utilisation incidents, the majority of gas supply incidents occurred within the workplace. Figure 15 displays the number of workplace and non-workplace incidents, with workplace incidents amounting to 82% of all recorded supply incidents.
Gas supply incidents – Workplace and non-workplace
Figure 16 illustrates that supply workers were involved in just 3% of the incidents and gas workers in 5%. Workers from other occupations were found to be involved in 75% of incidents and approximately 13% affected the general public.
Gas supply incidents – Workers and general public
Gas supply incidents – by type of gas
Analysis of the type of gas found in recorded supply incidents reveals 94% of incidents involved NG. In comparison, incidents involving LPG accounted for 6% as displayed in Figure 17 below. This may be reflective of the market size of each category. Figure 17A shows the percentage of consumers for NG and LPG.
Gas supply incidents – Type of gas
Gas supply incidents – Percentage of consumers by type of gas
Figure 18 below indicates that 80% of incidents resulted in a gas leak or release and 14% resulted in a fire.
Gas supply incidents – Type of incidents resulting from NG
Figure 19 below provides an overview of the types of incidents resulting from LPG but they are minimal in number when compared to natural gas.
Gas supply incidents – Type of incidents resulting from LPG
Figure 20 below is an analysis of the type of equipment found in gas supply incidents. It was found that gas piping was a factor in 84% of the incidents. These incidents largely related to accidentally damaging piping when excavating.
Gas supply incidents – Equipment type
Figure 21 below is an indication of the injury types sustained in supply incidents. There were no fatalities recorded in gas supply incidents until 2012/13 when there was one fatality.
Of all gas supply incidents, 1.9% resulted in hospitalisation and 1.4% in minor injuries. The large majority of 96% of incidents have resulted in no injury. 11% of incidents resulted in damage to property.
Gas supply incidents – Incidents resulting in fatality, injury, hospitalisation or property damage
Gas supply incidents – Incidents resulting in property damage