Failed or Absent Defences » LTA NDT testing

2Compressed Air Pipeline Failure



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Brief Description of Incident/Accident & Description of Consequences/Outcomes:

A length of galvanised pipe used for carrying compressed air into an underground mine failed when a section of the pipe wall failed under pressure.

Identified Root Causes:

The investigation has revealed that the pipe range had been installed an indeterminate number of years ago and had been in constant use over that period to supply compressed air to the underground workings. The section of pipe that failed has indicated that the pipe walls are approximately "paper thin" and could not withstand the compressed air pressure at this point.

Energy Type(s) Involved:

Uncontrolled release of energy

Equipment Type(s):

150 mm diameter galvanised pipe, 6 metres long

Root & Contributing Cause(s):

Failure under pressure

Stated or Potential Consequence(s):

Potential Fatality

Preventative/Recommended/Accepted Steps of Risk Mitigation, Points of Interest:

All mines are strongly advised to conduct an audit / inspection of all pipe ranges to determine if any areas of potential failure exist and to replace suspect pipes.

EMESRT Risk(s):

Stored energy systems

ISOLgate Checklist(s):

Download Stored energy systems Checklist.

Organisation:

Queensland Government Department of Employment, Economic Development and Innovation (DEEDI)


Results

Here are the results.


Information

Reference Type:

Safety Alert #160

EMESRT Risk(s):

Stored energy systems

Mine Type:

Any Mine Type

Energy:

Potential & Kinetik - Pressure > Pneumatic

Equipment:

Published:

2007

Region:

Australia, Queensland

ISOLgate Checklist(s)

Stored energy systems Checklist.

ICAM Categories

Organisational Factors

• LTA design

• LTA hardware

• LTA inspection

Task or Environmental Conditions

• LTA equipment integrity

Individual or Team Actions

• LTA hazard analysis/job safety analysis

Failed or Absent Defences

• LTA detection systems

• LTA NDT testing



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