Air, Mixed Gas & Nitrox Diving, Atmospheric Diving Systems, Autonomous Underwater Vehicle, Diving Technology & Tool Design, Nondestructive Testing, Operations Planning, Remotely Operated Vehicles, Towable Diving Systems, Towed Underwater Systems, Underwater IRM, Underwater Welding | Phoenix International Holdings, Inc.

Wet and Dry Chamber Hyperbaric Underwater Welding

Phoenix Underwater WeldingPhoenix International’s diving division – comprised of experienced professionals with diverse skills and comprehensive knowledge developed on projects worldwide – provides safe, high-quality underwater welding services to the offshore oil and gas, inland infrastructure, and commercial shipping industries.

Underwater Repairs

Phoenix offers a wide range of underwater welding services, including:

  • Class-approved wet and dry hyperbaric welding procedures for structural and pressurized piping utilizing multiple filler and base material combinations
  • Class-approved dry hyperbaric tendon porch and pontoon weld repairs to floating structures and vessels
  • Dry welding repairs inside of floating structure pontoons and columns
  • Wet and dry chamber hyperbaric weld repairs to fixed structures
  • Safe underwater cutting/burning of:
    • Carbon steel (regular, high strength, and high yield)
    • Aluminum
    • Copper Nickel/Nickel Copper
    • Monel
    • Stainless Steel
Welding Procedures

Currently, Phoenix has more than 53 certified Welding Procedure Specifications (WPSs) approved by various government and classing societies that greatly reduce client costs by enabling the use of pre-qualified procedures that match your materials and design.  If one of our qualified procedures matches your project needs, our personnel will aid in presenting it to the governing authority for approval.  However, if a new procedure is required, our engineers and American Welding Society (AWS) Certified Welding Inspectors (CWIs) will work with the governing classifying societies and clients to develop a specific WPS to meet the client’s needs.

Permanent Underwater Welds

Phoenix Underwater Burning and CuttingPhoenix also holds an American Bureau of Shipping (ABS) approved Class A wet underwater groove and fillet WPS for ASTM A 131 and Group II steels of the AWS D1.1, which together cover the structural welding code. With this procedure, Phoenix can now perform permanent underwater weld repairs to classed vessels and structures.

Our Experience

Phoenix has years of experience conducting inspection and repair work on floating structures in the Gulf of Mexico and vessels worldwide.  Some examples of our experience include:

  • Removing/replacing multiple structural members to repair a storm-damaged platform (over 2,000 hours of bottom time)
  • Welding at the splash zone to repair an offshore structure
  • Performing ABS-approved dry chamber hyperbaric repairs to a Tension Leg Platform (TLP) tendon porch
  • Performing ABS-approved weld repairs inside pontoons/columns on TLPs
  • Carrying out 25+ years of underwater wet and dry welding repairs to U.S. Navy ships and submarines
Our Certifications

Phoenix International maintains a corporate-wide commitment to safety and as such, is an ISO 9001:2015 Quality Management Systems certified company. Other professional certifications include:

  • American Bureau of Shipping (ABS)
  • American Society of Nondestructive Testing (ASNT)
  • American Welding Society (AWS)
  • Association of Diving Contractors International (ADCI)
  • Bureau Veritas (BV)
  • Class NK
  • DNV GL
  • International Marine Contractors Association (IMCA)
  • Lloyd’s Register
  • RINA
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