Diving & Subsea

Diving & subsea construction, inspection, and maintenance services

MISTRAS’ diving services delivers industry-leading construction, inspection, and maintenance solutions for assets in marine and subsea environments, including bridges, harbors, dams, reservoirs, underwater pipelines, and other complex infrastructure.

Many assets in the Civil Infrastructure, Oil & Gas, and Power Generation industries are fully or partially submerged in water, which creates a potentially corrosive environment that can affect the structural and mechanical integrity of critical assets. Our diving services help clients stay aware and repair their assets’ conditions in subsea environments.

Our technicians are highly qualified and fully certified in accordance with Canadian Welding Bureau (CWB) standards, ensuring all underwater welding and related activities meet the highest levels of quality, safety, and regulatory compliance. With this expertise, MISTRAS supports a wide range of project needs, from specialized diving operations and underwater welding to site-specific installation and repair.

MISTRAS keeps safety a priority while conducting underwater services with added efficiency and reduced cost. Combining advanced technology with diverse technical skillsets, we are a complete resource for subsea asset protection, providing:

Construction & Maintenance Services
Inspection Services
Engineering & Environmental Services
Potable Water & Hazardous Site Intervention

Subsea construction & repair services

Offered as a part of an integrated inspection plan or as individual services, MISTRAS’ divers can support underwater construction projects and/or repair damaged subsea assets to ensure structural integrity, with core services including:

Core Drilling
Welding (AWS and CWB-certified for both topside and underwater welding)
Oxygen-arc Cutting
Formwork Installation
Concrete Pouring
Injection
Demolition
Excavation
Mechanical Structure Assembling
Cofferdam Assistance
Scour & Erosion Repairs
Surface Preparation
High-Pressure Cleaning & Chipping
Cathodic Protection System Installation

MISTRAS’ diving center of excellence (COE)

MISTRAS’ diving center of excellence (COE) specializes in providing surveys, inspections, and maintenance solutions for subaquatic and maritime assets.

Subsea inspection services

MISTRAS’ trained divers utilize advanced non-destructive examination (NDE) equipment and imaging technology for subsea assets. Our diving teams are tailored to the needs of your assets, accommodating specific environments, project requirements, and asset types.

Subsea NDE inspection techniques and services that our diving inspectors offer include:

Geo-Reference Scanning
Ultrasonic Testing
Visual Testing
Sampling
Structural Verticalities & Horizontalities
Bathymetry Measures
Hands-On Inspection
ROV Inspection
Technical & Dimensional Surveying
Non-Destructive Testing
Video and Photo Surveys
Marine Salvage
Search & Rescue
Impact Study
Species & Marine Surveys
Flood Monitoring & Assistance

Where possible, MISTRAS also deploys subsea ROVs as a tool to avoid or minimize manned entry into potentially hazardous underwater environments.

Marine environmental engineering surveys & services

MISTRAS' environmental impact assessments ensure that construction practices uphold environmentally-friendly habits and that all proposals are consistent with good environmental management procedures.

Our marine surveys include assessing and monitoring any assets and equipment that will be used in marine environments to ensure that they are in good operating condition and are fit for safe usage in marine environments. Additionally, we are able to provide customized seabed sampling and bathymetrical surveys in accordance with your specific mandate requirements.

We also offer species monitoring programs, which estimate population sizes and trends of various animal and plant species that are present within the environment to ensure safety.

Potable water & hazardous site intervention services

Operating in high-risk or contaminated water environments, such as wastewater treatment facilities, demands specialized expertise and uncompromising safety standards. MISTRAS’ trained diving professionals deliver reliable, efficient solutions, backed by extensive experience, including project planning, specialized equipment selection, wall lining installation, and detailed inspection.

MISTRAS safely performs services in potable water sources, following strict procedures and using dedicated equipment to prevent contamination. Trusted in the most demanding conditions, MISTRAS provides peace of mind through disciplined execution and a strong commitment to safety and quality.

MISTRAS’ mechanical services

Watch for an overview of MISTRAS’ specialized mechanical services portfolio, which is just one solution in our comprehensive, one-source approach to asset protection.

Related resources

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Sustaining Underwater Pipeline Infrastructure

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Diving and Subsea Solutions by MISTRAS

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