Deepsea Titanium Pressure Hulls

The Pressure Vessel for Human Occupancy (PVHO) is at the heart of each U-Boat Worx submersible. It allows passengers to explore the subsea realm in safety and comfort without the risks associated with SCUBA diving. Across our range of submarines, we have subs where the entire pressure hull is made of acrylic; whereas other models have a high-grade steel section combined with a large acrylic window.

In our deepest-diving submersibles, we use titanium alloys to achieve optimum size, weight and performance characteristics.

Titanium has several distinct advantages – it is stronger than regular steel thereby enabling us to keep the weight of deep-diving models as low as possible. Other advantages include that it requires no maintenance, has an extended lifecycle, and has incomparable anti-corrosive properties.

So how do we make these titanium sections for the deep-diving models? Every component starts at the drawing board, where we conduct feasibility studies. With the help of advanced FEA (Finite Element Analysis) software, we calculate how thick the titanium needs to be to withstand pressure at depth – including an immense safety factor. We also determine how best to connect metal components to the acrylic windows.

After approval of world-leading classification society DNV GL, the titanium alloy needs to be specially produced. All materials are subject to rigorous quality tests before being processed. The titanium is forged, which takes place under a vacuum to ensure highest quality and purity. After further material and weld tests, various titanium parts that make up the pressure hull are welded. DNV GL also oversees and scrutinizes all welding procedures to ensure safety.

Upon completion of the welding, every join gets x-rayed for inspection. The end result is subject to further testing and examination. Once the titanium components are ready, the acrylic windows are installed to complete the pressure vessel.

The complete pressure vessel then undergoes a hydrostatic pressure test that simulates multiple dives – all deeper than the designated maximum operating depth of the submarine. Only after successfully completing these stringent safety tests, the interior, diving tanks, and other components will be installed to complete the submersible.

  • C-Researcher series

    C-Researcher Series
    • C-Researcher 2
      500 M 1,640 Ft
      5,750 KG 12,700 Lb
      2
    • C-Researcher 2
      1,140 M 3,740 Ft
      7,200 KG 15,800 Lb
      2
    • C-Researcher 2
      3,000 M 9,840 Ft
      9,960 KG 21,950 Lb
      2
    • C-Researcher 3
      300 M 1,000 Ft
      6,300 KG 13,900 Lb
      3
    • C-Researcher 3
      1,140 M 3,740 Ft
      8,900 KG 19,620 Lb
      3
    • C-Researcher 3
      2,500 M 8,200 Ft
      11,300 KG 24,910 Lb
      3
    • C-Researcher 3 LH
      500 M 1,640 Ft
      4,100 KG 9,040 Lb
      3
    • C-Researcher 3 LH
      1,700 M 5,570 Ft
      10,500 KG 23,150 Lb
      3
    Learn about the C-Researcher series
  • Cruise Sub series

    Cruise Sub Series
    • Cruise Sub 5
      500 M 1,640 Ft
      8,500 KG 18,750 Lb
      5
    • Cruise Sub 5
      1,140 M 3,750 Ft
      11,000 KG 24,250 Lb
      5
    • Cruise Sub 5
      1,700 M 5,570 Ft
      16,000 KG 35,260 Lb
      5
    • Cruise Sub 7
      300 M 1,000 Ft
      9,500 KG 20,940 Lb
      7
    • Cruise Sub 7
      1,140 M 3,740 Ft
      14,500 KG 31,970 Lb
      7
    • Cruise Sub 9
      300 M 1,000 Ft
      11,000 KG 24,250 Lb
      9
    • Cruise Sub 11
      200 M 650 Ft
      13,300 KG 29,320 Lb
      11
    Learn about the Cruise Sub series
  • Super Yacht Sub series

    Super Yacht Sub 3
    • Super Yacht Sub 3
      300 M 1,000 Ft
      3,800 KG 8,380 Lb
      3
    Learn about the Super Yacht Sub series
  • C-Explorer series

    C-Explorer Series
    • C-Explorer 3
      300 M 1,000 Ft
      6,010 KG 13,250 Lb
      3
    • C-Explorer 5
      200 M 650 Ft
      7,340 KG 16,180 Lb
      5
    Learn about the C-Explorer series
  • HiPer Sub series

    HiPer Sub Series
    • Hiper Sub 2
      100 M 330 Ft
      2,500 KG 5,510 Lb
      2
    • Hiper Sub 4
      100 M 330 Ft
      3,200 KG 7,050 Lb
      4
    Learn about the HiPer Sub series
Model Overview
feet/poundsmeter/kilogram
  • Occupants (min.)

    2
    11
  • Depth (min.)

    100
    3000
    328
    9840
  • Weight (max.)

    2480
    16000
    5465
    35270
  • Height (max.)

    150
    290
    60
    120