Underwater Welding & Repairs — Precision Beneath the Surface
Certified commercial divers performing professional underwater welding and metal repairs for vessels and offshore structures Worldwide - Strong welds. Safe waters.
Professional Underwater Welding & Repair Services Scandinavia and Worldwide
At Delta Marine Scandinavia AB , we deliver certified Underwater Welding & Repairs for vessels, ports, and offshore installations.
Our experienced commercial divers and welders perform high-precision repairs directly underwater — eliminating the need for dry-docking and reducing operational downtime.
Whether it’s a damaged hull plate, cracked propeller, or corroded structure, we provide permanent, class-approved repairs designed to restore integrity and performance safely.
We combine advanced wet and dry welding techniques, underwater cutting tools, and inspection technology to deliver results that meet the toughest industry standards.
Our team operates 24/7 worldwide , responding quickly to both scheduled maintenance and emergency underwater repair operations.
Why Underwater Welding & Repairs Matter
Underwater damage can occur from corrosion, collisions, or fatigue — and if left unattended, it can compromise your vessel’s safety and class certification.
Our underwater welding and repair services allow you to:
- Restore structural integrity without dry-docking
- Minimize downtime and repair costs
- Ensure compliance with class and insurance requirements
- Extend hull and component lifespan
- Maintain vessel performance and seaworthiness
Every weld we make below the surface ensures the safety and reliability of what’s above it.
Our Underwater Welding Capabilities
We perform a full range of underwater welding and repair operations for temporary and permanent repairs, including:
- Hull crack repair and plate replacement
- Cofferdam installation and inserts
- Rudder repairs
- Bracket and support welding
- Structural reinforcements and patch installation
- Underwater cutting and removal of damaged sections
- Pipeline and intake grill welding
- Anode brackets and mounting plate installations
Our divers are trained to perform both wet welding (directly underwater) and dry habitat welding (inside sealed enclosures). Depending on the material, class requirement, and sea conditions, we select the most effective and safe method.
Wet Welding vs. Dry Welding
Wet Welding is the most common method used for in-water maintenance and repairs. It’s fast, efficient, and suitable for temporary or permanent solutions on steel hulls and frames.
Dry Habitat Welding is used when the highest precision and durability are required — typically on class-critical components such as hull plates or pressure-bearing structures.
At Delta Marine Scandinavia AB , we assess each situation carefully and apply the most suitable method for long-lasting, class-approved results.
Our Process – Safe, Certified, and Efficient
Every underwater welding operation follows a strict, certified workflow:
- Assessment & Inspection:
We perform a detailed visual or video inspection to determine the scope and material condition. - Surface Preparation:
The area is cleaned of marine growth and corrosion to ensure weld adhesion and visibility. - Welding Execution:
Using advanced welding rods and techniques, divers perform controlled welds under constant communication with the surface team. - Non-Destructive Testing (NDT):
Welds are tested using ultrasonic or magnetic-particle inspection for integrity and safety. - Documentation & Reporting:
Each repair includes a full technical report with photos, video, and certification for class and owner records.
We use class-approved consumables, and all procedures are performed under DNV and ABS guidelines, ensuring full compliance with international standards.
Environmental & Safety Standards
Safety and environmental responsibility are at the core of every Delta Marine Sweden operation.
- All divers are IMCA and HSE-certified.
- We use low-spatter welding consumables to minimize contamination.
- Underwater cutting and welding operations follow HELCOM and IMO pollution control standards.
- All projects include risk assessment and method statements (RAMS) to ensure safety above and below water.
Our goal is simple — to repair responsibly, without compromising people or the planet.
Industries & Applications
Our underwater welding and repair services support a wide range of industries, including:
- Shipping and Marine Transport – hull, rudder, and propeller repairs
- Oil & Gas Offshore – subsea structures, risers, and platforms
- Renewable Energy – wind farm foundations and underwater cable supports
- Ports & Harbours – quay walls, pilings, and mooring structures
- Defense & Research Vessels – specialized underwater fabrication and maintenance
From ships to subsea installations, we keep operations safe, efficient, and seaworthy.
FAQ
Yes. Using wet or dry welding techniques, certified divers can safely weld and repair structures directly underwater.
Absolutely. All welds are performed under controlled conditions, using class-approved consumables and inspection methods.
Both. We perform temporary repairs (for voyage approval) and permanent repairs certified by classification societies.
We use ultrasonic, magnetic-particle, or visual inspection to confirm weld integrity and strength.
Yes. Our divers are available 24/7 for emergency repairs anywhere along Spain, Scandinavia, and Worldwide.
Contact Our Dive Team
Need urgent Underwater Welding & Repairs?
Delta Marine Scandinavia AB offers rapid response, certified welders, and guaranteed results.
Contact Delta Marine Scandinavia AB Today.