Wet and Dry Chamber Hyperbaric Underwater Welding

Phoenix International’s Diving Division is staffed by a team of experienced professionals with global project expertise and a deep understanding of underwater operations. We deliver safe, high-quality underwater welding services to clients in the offshore oil and gas, inland infrastructure, and commercial shipping industries.

Our certified divers and welders operate in a wide range of environments, providing both wet and dry welding solutions backed by strong engineering support and a strict commitment to safety, quality, and efficiency.

Underwater Repairs

Phoenix provides a comprehensive range of underwater welding and cutting services, supporting structural repairs on floating and fixed offshore structures, vessels, and subsea systems. Our work is performed by certified commercial divers using class-approved procedures and is backed by in-house engineering expertise.

Welding Capabilities:

• Class-approved wet and dry hyperbaric welding procedures for structural and pressurized piping
• Class-approved dry hyperbaric welding repairs on tendon porches and pontoons of floating structures and vessels
• Dry weld repairs within floating structure pontoons and columns
• Wet and dry chamber hyperbaric weld repairs to fixed offshore installations
• Safe underwater cutting/burning of:
  • Carbon steel (regular, high strength, and high yield)
  • Aluminum
  • Copper Nickel/Nickel Copper
  • Monel
  • Stainless Steel

Our underwater repair services help clients maintain the integrity, safety, and lifespan of critical marine assets in the most challenging environments

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 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. Phoenix can now perform permanent underwater weld repairs to classed vessels and structures with this procedure.

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