QCLNG CASE STUDY

 

QGC Pty Ltd , the Australian subsidiary of BG Group, created a 540 kilometre steel  gas pipeline to connect the gas fields of the Western Downs to a liquefied natural gas (LNG) plant on Curtis island in 2013.

 

The details were provided online to the public and it has given us a perfect case study to compare a traditional approach to the more advanced and innovative WNR Systems method.

 

QCLNG Pipeline Specifications

 

Pipeline: more than 540 kilometres

Diameter: 42 inches or 1.07 metres

Pipe length: 12 metres

Number of pipes: 46,200

Weight: each pipe is 4 tonnes

Burial depth: up to 1.5m

Operating life: 40 years

Work force: more than 1,575 at peak construction for a total of 12 million working hours

Travel: Project vehicles travelled more than 44 million kilometres

Extra fusion bonded epoxy coating and cathodic protection added to prevent corrosion

 

 

 

 

 

 

 

Approximate cost comparison in AUD

Notes: Only working this WNR SYSTEMS machine at 60% of capacity for the above figures. Eg. Laying 4.6 kms of pipeline per 16 hour day with 50 personal employed on site – 25 employees per 8 hour shift. 554 kms of pipeline divided by 4.6 kms per day = 120 working days to complete this pipeline using only one WNR SYSTEMS machine. If working to full capacity, 16 hours per day the 554 kms of pipeline would be completed in 74 working days with the same machine. Fewer employees are needed since less clearing, trenching, handling and backfilling is required. Therefore less fuel to operate the project vehicles would be required. Please see brochure for more information.

CRWP CASE STUDY

 

Murphy Pipe and Civil (MPC) was contracted to construct a 120km welded, carbon steel gas pipeline for the Comet Ridge to Wallumbilla Pipeline Project (CRWP) as additional capacity to the existing system. The pipeline transports coal seam gas (CSG) from Wallumbilla (20kms outside of Roma) to Gladstone where it is then converted to liquefied natural gas (LNG).

 

With the below details we can compare MPC’s traditional steel pipeline approach to the more advanced and innovative WNR Systems method which can produce a continuous (no-join) fiberglass pipeline on site.

 

Comet Ridge to Wallumbilla Pipeline Project Pipeline Specifications

 

Pipeline: 120 kilometres

Diameter: Ø600mm

Wall Thickness: 12 – 15mm

Pipe length: 12 metres

Work force: approx. 350

Project length: approx. 330 days

 

Approximate cost comparison in AUD of using steel pipes vs using WNR Systems’ method

* Notes:

WNR Systems machine producing at 60% of capacity will achieve the above figures.

Fewer employees are needed since less clearing and handling is required.

Significant reduction on the environment due to a much smaller footprint.

The working conditions are enhanced as a result of minimal heavy machinery.

Fewer disturbances to flora and fauna.

Option of fibre optic and other communications included within the finished pipeline.

The elimination of power lines and poles means no more fallen lines and possible bushfires due to lightning strikes.

Unrivaled efficiency, reduced contract time with minimal community disturbance.

 

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