Subsea pipelines and subsea cable systems installation
All servicesWelding, pipelay, burial and tie-in to platforms: 28 pipelines and 16 cable lines in the Caspian
We perform the offshore phase of subsea line construction: route preparation, welding of pipe strings on the lay vessel with inspection of every joint, pipelay and ballasting, trenching, riser installation and tie-in to platforms, testing and pigging. Company-managed marine spread — the TB-6000 transportation and installation barge, the CLV East River cable-lay vessel and anchor-handling tugs; diving support by our own diving spreads.
References: six lines from 168 to 508 mm in 23–34 m of water; replacement of operating pipelines in 0.5–4.5 m of water; two 10 kV cable lines of 9.3–9.4 km buried to 2.1 m. Works to DNV-ST-F101 and RS rules under the supervision of an independent Marine Warranty Surveyor.
Cable lines — scope of work:
- offshore engineering surveys;
- engineering in the scope required to execute the operations on subsea cable lines installation
- purchasing, inspection, acceptance, expediting and transportation of project materials;
- laying subsea power and data cable lines using specialized cable laying vessel and burying cables;
- cable lines testing;
- geodynamic and hydrological monitoring systems underwater part installation;
- commissioning works.
Subsea pipelines installation services, rendered by CNGS Engineering, include, but are not limited to the following:
- offshore engineering surveys;
- engineering in the scope required for subsea pipelines transportation and installation;
- fabrication of transported 3-D sections of pipelines;
- heat insulation and heat tracing of pipelines;
- transportation, laying, ballasting on a seabed; free spans elimination
- pipe spools and risers installation, connection to onshore facilities and process equipment of offshore fixed platforms;
- pipelines testing; cleaning, calibration and drying of cavity;
- means of cathodic protection;
- preparation and execution of commissioning works;
- development of subsea tranches including arrangement of landfall in the shore line;
- reconnection of pipelines and replacement of the existing pipelines sections (including live ones).
Discuss your project
Describe the parameters of your facility and we will prepare a preliminary technical assessment.
+7 (495) 280-13-25info@cngsengineering.ru
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