DBP Expansion Projects
The DBNGP underwent a range of expansion projects under previous ownership structures. However, the most advanced have been undertaken by the current owners, who have invested in three major expansion projects since acquiring the asset, these projects are known as Stage 4 (constructed by Nacap Australia Pty Ltd), Stage 5A (constructed by Saipem) and the most recent, Stage 5B (as constructed by McConnell Dowell).
These three projects were carried out in direct response to increasing demand for gas in the south-west of WA. The owners worked closely with major gas customers to deliver the capacity required within the timeframes needed to support those customers’ projects. Increasing the gas haulage capacity of the pipeline was crucial in supporting economic growth in WA.
The expansions were designed and built to meet DBP’s contractual obligations. As a result of the expansions, 83% of the pipeline has now been duplicated – effectively creating a second pipeline. This was achieved via a process known as looping. Looping involves installation of pipe lengths parallel to the existing asset. The expansion projects also required upgrade works on the pipeline’s compressor stations, control and communications systems and metering equipment.
The three expansions have increased the capacity of the pipeline by over 300 terajoules per day as well as enhancing the reliability of the pipeline and improving security of supply for customers. The Stage 4, Stage 5A and Stage 5B expansion projects have seen the pipeline owners inject $1.7 billion into the DBNGP. In the next 12 months, the final closure and completion of the Defects Liability Period will expire. The works include the:
Flow testing of all station pipework at design flows:
- The completion of the Fortescue River Crossing
- The modifications and completion of traffic and flow management at all stations
- The ongoing environment restoration and subsidence repairs of the Right of Way.
Read more about this topic: Dampier To Bunbury Natural Gas Pipeline
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