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TGP-VTS Interconnect

Client :

APA_Group_(Australia)_logo

Project Date

2016

Length

0.35Km

Pipe Diameter & Type

DN300 and DN250 steel pipeline

National Australian Pipelines were engaged by APA to construct a new gas facility in order to inject stored natural gas from the Tasmanian Gas Pipeline (TGP) into APA’s Victorian Transmission System (VTS) at Longford in Victoria.

National Australian Pipelines were engaged by APA to construct a new gas facility in order to inject
stored natural gas from the Tasmanian Gas Pipeline (TGP) into APA’s Victorian Transmission System
(VTS) at Longford in Victoria. The works included two hot-tap connections, a Transfer Station Facility
(TSF) and an interconnecting pipeline between the Tasmanian Gas Pipeline (TGP) and the Victorian
Transmission System (VTS). The construction included supply and mechanical installation of the TGP
Main skids and associated electrical and instrumentation works. National Australian Pipelines also
constructed 700 metres of DN300 steel pipeline and 50 metres of DN250 steel pipeline in accordance
with the specifications and drawings provided by APA as well as AS2885.

Major activities

Major activities undertaken for this project included:

Provision of construction management plans for the pipeline including; Health and Safety Plan, Site Environmental Management Plan, Quality Plan.
Provision of Traffic Management Plans.
Fulltime traffic management on project through construction of the pipeline.
Site setup and survey of pipeline alignment.
Identification and potholing of existing assets and utilities using Non-Destructive Digging (NDD).
Installation of above ground pipeline spools and skids to including installation of: Inlet isolation skids, Dry gas filter skids, Liquid drain drum, Fuel gas skid, Gas heater skids, Regulation skids, Meter skids, GC Shed/DEA, Boiler Skids
Construction of boiler skid shelter.
Electrical installation, commissioning and instrumentation of the pipework skids at the End of Line Station.
Welding of 300mm X52 steel pipe & 250mm and 100% non-destructive testing (NDT) of mainline welds.
Stringing and laying of welded steel pipeline using a CAT 28 ton and 5 ton hydraulic excavator, as well as a CAT 924H wheel loader.
Construction using horizontal directional drilling to construct the main under Jemena’s driveway and under existing transmission gas assets.
Coating of joints and unprotected steel to ensure the integrity of the pipeline. Coating tested with a Holiday Detector.
Backfilling of pipeline using APA approved materials that met the specification provided in the contract.
Construction of the DN300 steel pipeline within a brown field site – existing APA Longford compressor station site.
Installation of cathodic protection (CP) point and several marker posts as required by APA.
Pigging, gauging and hydro testing the new mains to a minimum pressure of 25,000kpa in accordance with AS2885.5-2016.
Completion of two hot-taps to commission the newly constructed 300mm and 250mm steel main.
GALLERY

View photos of our team in action

View photos of the work undertaken for this project: TGP-VTS Interconnect
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