Rectangular Tanks

Although not as common as cylindrical tanks, rectangular tanks are often used due to some of the advantages offered by these tanks. One of them is the highest capacity for the same external dimensions. This advantage is often critical for offshore operations where space is very limited and capacity requirements are high.

These tanks are often made in dimensions of a CSC shipping container, to allow ease of transportation and save on shipping costs for long distance sea transport. The tanks can further be designed as stackable during shipment alone or during operations as well, to further save on the space requirements, especially for offshore operations.


  • ASTM A36 / EN 275JR Carbon Steel Construction
  • Corrugated steel walls optimize material use and fabrication costs
  • ASME B31.3 piping with ANSI B16.5 150# Class Flanged Connections
  • Designed as per API 620/650 Standards
  • Pad-eyes and slings designed as per DNV 2.7-1
  • External paint and internal coating as per application
  • Multiple inlet and outlet nozzles
  • Walkway with grating on roof of the tank
  • Access hatch with ladder for internal inspection and maintenance
  • Optional level transmitters and level switches for automation

Design Specifications

  • Operational temperature 0°C to 55°C
  • Survivability temperature -20°C to 55°C
  • Optional winterization for sub-zero operation, including insulation and fluid heating


  • Oil and water sludge
  • Base oil and chemical storage
  • Diesel fuel for generators and site vehicles
  • Sea water and Salt water storage
  • Utility water storage for process equipment as well as site utilities


  • Rectangular tanks provide highest internal volume to external dimension ratio and the reason why they are more commonly used offshore. Multiple Rectangular tanks can be stacked vertically to minimize footprint requirements.


  • Corrosion protected tanks increase the service life and minimize contamination. Use of 100% recyclable material for construction provides full salvage value after service life.

Petroleum Palace Group strives to address the broad spectrum of its customers’ needs. Contact us for your inquiries.