Dimensional Control Surveys (AKA DC or TTS)

ENG-CAD’s Dimensional Control Survey Department has been specifically created to undertake highly accurate Laser Total Station Surveys to electronically capture / verify existing equipment and assets as well as the provision of a precision dimensional control facility throughout the fabrication and commissioning phase of any construction project.

Because of our extensive practical design and construction background, we are able to offer a comprehensive and flexible service removing both the requirements for costly on site fabrication activities and thereby drastically lessoning the business risk for any integrated engineering development project.

Our diverse portfolio already boasts a considerable variety of major clients within the Oil & Gas, Petrochemical, Nuclear, Public Utility, Renewable Energy fields including Marine Engineering and we are continuing to expand our horizons to encompass the entire spectrum of engineering construction enterprise.

Pipe spool Verification pre-post and brownfield surveys are most common and provide invaluable “peace of mind” and a vast cost saving approach to the successful installation of new or replacement pipework by using special software to calculate flange angles and bolt hole rotations.

Typical Applications

  • Flowline installation
  • Brownfield upgrades
  • Derrick alignments
  • Module hook-ups
  • Jacket/topside hook-ups
  • Vessel change-outs
  • FPSO conversions
  • System as-builts
  • New platform build control
  • Clash checking
  • Wind farm installation
  • Rudder stock & jig geometry verification


  • High quality, cost and schedule effective service
  • Enhanced design and improved constructability
  • More meaningful and constructible design deliverables
  • Maximise working efficiency
  • Early project completion
  • Decrease downtime and increase uptime


  • Reduce hot work, construction schedule, costs and risk
  • Proprietary software significantly reduces need for scaffolding and time spent offshore
  • Eliminate clashes and unknowns
  • Minimise shutdown time
  • No retrospective engineering
  • Eliminate re-work

Contact Surveying Services:

Tel: 01493 600400
Int: +44 1493 600400

ENG-CAD Engineering Services Brochure

Dimensional Control Case Studies:

Pipe Spool Replacement

Pipe Spool Replacement

Client Case Study: ENG-CAD have produced a number of complex pipe spool replacements, involving detailed dimensional surveys, design, fabrication and when required, PED approval and pipe stress calculations.

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Racking Board

Racking Board

Client Case Study: ENG-CAD’s scope of work was to provide a dimensional survey of the existing mast & racking board, followed by structural design calculations & fabrication drawings for the new racking board.

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Scrubber Vessel Replacement

Scrubber Vessel Replacement

Client Case Study: A dimensional control survey was carried out at one of the Bacton Gas Terminals of an existing scrubber vessel, including a full report and fabrication drawings.

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