Black Tip Onshore Gas

Client Details

Monadelphous Engineering Associates


Northern Territories, Australia

Project Timeline

July, 2008 to July, 2009

Contract Value

In excess of $5,900,000.00 Australian Dollars

Project Overview

The Blacktip OGP facility is a greenfield development to provide a landing and processing facility servicing the Blacktip Field situated over 100km offshore in the Joseph Bonaparte Gulf. In turn, the process gas is transferred, via an onshore gas line, to Darwin.

VHM provided turnkey services coordinating and controlling all aspects pertaining to the GRE systems. Services were provided from both our Perth and Blacktip site offices over a12 month duration.


Scope comprised of providing the following pertaining to the water storage tanks;

  • Material procurement

  • Engineering design

    Valve pits, manholes, Valve supports, Trench details, Road Crossing, Seal Pots special item, Caesar II stress analysis
  • Detailed design

    GA site plan detail drawings, Piping fabrication isometrics, Valve support detail drawings, Valve pit and manhole detail drawings, Road Crossing, Seal pot (COC) detail drawing, Penetration interface detail drawing
  • Pre-fabrication of special items

  • Site services including;

    Site engineering, Materials control, Full traceability, Site problem solving/solutions
  • Site fabrication, installation and testing

  • Red line and as-built marking of all drawings



A four-point lift used to restrict the amount
of field joints within the trench and reduce
the open excavation times.


Fabrication facility erected on-site including tools and consumables store, power generation etc.​


200mm fire water line installed prior to hydrostatic testing​

Main Valve Pit

350mm fire water ring main valve pit area
completed with Key-Lock joints to allow for
easy valve removal and maintenance.

Trench Installation

Multi layer trench, installation of AOC and
COC systems awaiting pre-cast manhole
to be delivered

Joint Preparation

Taper-Taper joint preparation by a fitter/ fabricator on site. BondStrong fabricators, supervisors and QAQC representatives are trained and fully qualified to ISO14692​