Colongra Lateral Pipeline
Construct 9 kilometres of gas pipeline.
The Colongra Lateral Pipeline was one of the biggest successes for Diona. Valued at over $21 million, this project put Diona as a leader in gas pipeline construction.
This project involved the installation of nine kilometres of 1067 millimetre diameter pipe with wall thicknesses of between 24 millimetre, 27 millimetre and 30 millimetre. Constructed of X70 high carbon steel, this pipeline is the largest diameter storage vessel pipeline constructed in Australia. Many of the components and materials required were not available within Australia requiring outsourcing from America, Canada, Europe and Asia.
The pipeline was designed as a storage vessel; requiring the pipeline to cater for varied pressures up to 15,000kPA for over 4000 cycles which is a first in Australia and possibly world wide. The set-up this 9 kilometre project took quite a significant amount of time. Diona adapted to this challenge using the most cost effective method possible for the client.
During the tender submission, Diona provided an alternative bid to remove 500 metres of swamp and later fill the void with a suitable material which enabled the large equipment to work effectively and provide additional security to the pipeline. This would allow the pipe to be installed within the fill embankment, which the client took on as the most cost effective and safe option. Along with this, Diona provided the client with the alternative alignments to improve the cost effectiveness of the construction solution.
May 2008 - August 2009