Design, Engineering, Supply, Construction, and Installation of Marine Pipeline for Seawater Intake System
South Pars Gas Field Development – Phase 19

The South Pars Gas Field Development – Phase 19 project is a critical component in the development of one of the world's largest gas fields, located off the southern coast of Iran. Delta Offshore Technology was commissioned by Petropars Iran (PPI) to design, engineer, supply, construct, and install the marine pipeline system for the seawater intake, an essential infrastructure element supporting the onshore cooling facilities.

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This ambitious project involved the installation of robust HDPE pipelines for the intake and return of seawater, utilizing advanced engineering techniques to ensure operational efficiency and environmental sustainability. The successful execution of the system underscores Delta Offshore Technology’s expertise in marine pipeline engineering, reaffirming its role as a leading provider of innovative, large-scale offshore infrastructure solutions.

Project Overview

Project Overview

Commissioned by Petropars Iran (PPI) to support the onshore cooling facilities for South Pars Gas Field Development, Phase 19, Delta Offshore Technology successfully executed the design, engineering, procurement, construction, and installation of the marine pipeline system for the seawater intake. Located south of Iran, east of Kangan Port, the seawater intake system is essential for supplying cooling water to the onshore facilities.

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The system includes two 1,200-meter-long, 2-meter diameter HDPE pipelines for seawater intake and a 200-meter-long HDPE outfall pipe for the return of warmed discharge water to the sea.

Delta Offshore Technology’s Scope of Work

Delta Offshore Technology’s Scope of Work

Delta Offshore Technology undertook the following key activities:

  • Pre-Engineering Surveys: Conducting hydrographic and sub-bottom surveys and comprehensive geotechnical studies to support the design and installation process.
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  • Design and Engineering: Performing basic and detailed design, as well as installation engineering, to ensure the effective implementation of the seawater intake system.
  • Procurement: Sourcing high-quality materials and components for the construction and installation phases.
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  • Construction and Installation:
    • Fabrication of HDPE pipelines onshore.
    • Towing pipelines to the project location and installing them using the float-and-sink method.
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    • Placement of pipelines in trenches, followed by backfilling to ensure protection against potential damage, such as ship anchor drag.
    • Providing ballasting weights by injecting grout into core-tube pipes inside the HDPE pipelines, similar to the South Pars Phase 12 seawater intake system.
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    Delta Offshore Technology successfully delivered the seawater intake system, adhering to the client’s specifications and industry standards. The system is now fully operational, supplying seawater for cooling and ensuring the safe discharge of warmed water back into the sea. This project highlights Delta Offshore Technology’s comprehensive capabilities in marine pipeline engineering and installation, reinforcing its position as a leader in complex offshore infrastructure projects.