UNDERWATER WELDING

Dry Hyperbaric welding is the process of welding at elevated pressures underwater. It is performed inside a specially constructed cofferdam, creating a dry environment. Defective shell plating sections can be replaced underwater by class approved permanent dry welding. When necessary, custom fabrication of habitats is carried out on-site. Welding is performed in a wet environment using shielded metal arc welding with a waterproof electrode. This is commonly used for temporary repairs and construction. A2Z performs both wet welding for temporary or permanent underwater repairs, from anode renewal to rudder or hull plating repairs. Other applications include sacrificial anode replacement, damage control for marine casualties, rope guard repairs, rudder repairs, hull weld repairs, bilge keel repairs, external doubler plates and sealing up disused inlets and outlets.

Safe, reliable and cost effective

Underwater welding is a safe, reliable and cost effective technique for temporary repair and construction. We diligently test new materials and methods in our simulated underwater environment in order to be at the forefront of the latest technology.

Under 24hrs & no drydocking

The total time for welding underwater is normally under 24 hrs, with no drydocking or down time. It’s a cost effective solution that is guaranteed to get you back on schedule fast. Feel free to contact us!

Maintenance

When you want full control of the equipment's lifecycle. Through condition-based maintenance and expertise in the generation, distribution and propulsion systems, we balance the cost of maintenance with the risk of failure. Whether it is at dry-docking or loading/unloading cargo, we offer maintenance services that best fit the vessel's schedule.Our safety Group engineering and design resource covers a wide range of disciplines and work scopes including mechanical, structural, marine, oil and gas engineering, all supported by the latest technology. Additionally for projects such as general fabrication we can either design your requirements in-house or provide additional support to your engineering teams on an ad hoc basis. With our in-house engineering capability you have the option of either providing us with the drawings of the components that you require to be fabricated or we can design and build to your requirements. Our safety Group has a proven track record for responding quickly to the customer requirements for urgent orders, ensuring that client projects are not delayed. Our priority is to ensure we work fast to efficiently meet the clients’ immediate project needs.

Our Maintances Services:

* Industrial insulation blankets
* Vessel maintenance
* Welding & fabrication (Certified 6G/R welders & fabricators)
* Insulation repairs, cladding & fabric)
* Electrical installation & inspection testing – insulation, HIPOD, EX Compex
* Heavy lifting & rigging
* Remedial painting – mechanical surface preparation
* Storage tank painting
* Fire monitor maintenance
* Loading arm maintenance
* Hook up services (full rigging support, disconnecting – re-instating pipes, valves, platforms, hang off risers & umbilicals within STP compartment, bolt tensioning hydro tightening)
* Engineer, fabricate & install industrial insulation blankets (pipework & pressure vessels
* Engineer fabricate & install fabric windwalls & signage
* Electrical installation (cable pulling & termination – installation & modifications of cable trays)
* Remedial mechanical surface preparation & painting (mechanical surface preparation with multi – coating application)
* Heavy lifting & rigging works (certified & approved riggers)
* Leak testing (piping & valves support services)
* Fire deluge systems (installation support)
* Hydro-tight tensioning & bolt torqueing (certified & approved technicians)
* Flare tip (removal – repair – replacement A-frame or helicopter operations)

Electrical installation & inspection testing

Our manufactures and markets a broad offering of portable and laboratory measuring instruments covering the electrical and electronics sectors as well as physical quantities. As the inventor of multiple patents,We proposes an innovative offering of Test and Measurement instruments enabling professionals to test the reliability, safety and effectiveness of devices, equipment and processes. The solutions for measuring electrical and physical quantities under Our brands cover the whole range of professionals’ present requirements.

Engineer, fabricate & install industrial insulation blankets

Boiler and engine rooms are usually thought of as hot, uncomfortable places to work. Add the space constraints of marine installations and conditions can range from inhospitable to downright dangerous, as piping systems can exceed temperatures of 1,000 ºF (537 ºC). So when a fleet of drilling ships reported that their exhaust insulation had come apart and needed to be replaced, it was all hands a manufacturer of insulation solutions.

Electrical installation (cable pulling & termination – installation & modifications of cable trays)

The main function of cable trays and cable ladders is to support electric cables securely between two points. These are structural mechanical components in the electrical installation. They are compliant with standard, defining mainly:

• Load bearing
• Electrical continuity
• Earthing
• Electromagnetic compatibility.

Condition monitoring solutions for motors and generators

We provide motors, generators and mechanical power transmission products, services and expertise to save energy and improve customers’ processes over the total life cycle of our products, and beyond.We provide motors, generators and mechanical power transmission products, services and expertise to save energy and improve customers’ processes over the total life cycle of our products, and beyond.Our solutions cover all major components of motors and generators: rotor, stator, shaft, bearings, cooler, brushes or slip rings, as well as overall mechanical condition and, for motors, power supply quality. We can therefore help you to address all the potential problem areas in your motors and generators. Furthermore, our versatile services are not limited to our products – they are just as effective on equipment from any manufacturer.

Condition monitoring

Bring predictability to maintenance

By measuring mechanical and electrical condition of the power plant, automation and propulsion system, we observe trends and plan a long term upgrade/retrofit program. This enables our customers to predict their long-term maintenance budget for an individual vessel or an entire fleet.

Increase flexibility through condition-based maintenance

Through condition monitoring, ship managers have more flexibility to schedule maintenance work based on the actual condition of the equipment.Our condition monitoring reports are valid as OEM recommendation in an alternative survey arrangement towards classification societies.

Plan ahead for effective response

Through condition monitoring, ship managers have more flexibility to schedule maintenance work based on the actual condition of the equipment.Our condition monitoring reports are valid as OEM recommendation in an alternative survey arrangement towards classification societies.With service engineers specialized in our systems, we help superintendents to prepare for specific service actions, so the equipment can be overhauled and maintained properly. Our maintenance plans can be customized based on the customer's operations.

Underwater Hull Cleaning

The rich activity of the underwater (uw) ship repairs company A2Z is a glowing unique example of a speedy and healthy development in the maritime sector. Our Company has experienced and well trained diving staff in underwater repair and underwater maintenance of ship hulls. Moreover, we provide a whole range of wet services that ships require.

The main objective of A2Z, is the continuous enhancement and development of money saving choices that it ensures its customers. Towards this direction, the most effective solution in saving money is the underwater hull cleaning. “Clean ship’s Hull means, reduction of fuel consumption, reduction of CO2 emissions, increase of ships speed.” “Fouled ship hulls increase the overall cost, causing increased fuel consumption and the emission of gaseous pollutants. The engines are strained as well as the propulsion system, the ship slows down.We provide high quality underwater hull cleaning services (uw hull cleaning) ensuring the customer a prolonged period away from ship’s drydock, saving time and money.”

FOULED SHIP HULL

One of the biggest problems facing the world shipping is fouled ships hulls. 1746 different species of marine organisms have been counted up, which are attached to submerged surfaces. Like shellfish, seaweed, sea moss and hydroids, which clog the underwater intakes, covering antifouling paint and creating a thick layer on the ship’s hull which in time destroys and affects its “good” function. Shellfish such as oysters and mussels, release millions of young bivalves in the water, which move with the help of the ocean currents. The young bivalves to enable to feed themselves adhere to static objects, which attract various species of algae. Ships that are anchored are ideal for the growth of these microorganisms. Typically, these are reduced when the ship is at sail, except for some that are very durable, such as the Brown Weed, which remain on the hull even when the ship is developing rapidly.

After Cleaning & Before Cleaning

CORROSIVE SPECIES

Another very resistant species are algae that secrete a sticky fluid which is highly corrosive, deriving from billions of algae monocytes, which produce syrupy nutritional means, which creates colonies, once installed they reproduce. Thus, a coating of the sticky liquid is created, as a thick layer which remains on the hull as the ship moves.

OUR ADVANTAGES

* Underwater cleaning of sides
* Underwater cleaning of flat
* Underwater cleaning of curves
* Underwater cleaning of the rudder
* Underwater cleaning of the propeller
* Underwater cleaning of the sea-gratings
* Underwater cleaning of the sea chests

THE OUTCOME OF HULL CORROSION

The outcome of fouled hulls is the increase of abrasion resistance of the ship. The increased abrasion leads to speed reduction. Coating with 1mm thickness increases the abrasion by 80% thereby reducing the speed by 15% (Townsin 1987; Lui et al, 1977). So in order to maintain the same speed greater fuel consumption is required, thereby increasing the cost and the emission of gaseous pollutants. Depending on the type of vessel, fuel can make up about 50% of the operating cost of a ship. It is estimated that the fuel consumption increases 6% for each 100mm increase of speed. The increase in weight of the hull from the fouling has the effect of reducing the hydrodynamic behavior of the vessel, since it lowers the center of gravity of the vessel, therefore affecting its maneuverability.

UNDERWATER CLEANING WITH BRUSH KART SYSTEM

A2Z, provides high quality underwater hull cleaning with u/w Brush Kart System ensuring vessel operators that they employ a safe and cost-effective strategy. Our Brush kart system has reached perfection since it is manufactured in our work shop. All our service stations are furbished with new Brush Kart System on a yearly basis; especially manufactured, hydraulic power is differentiated according to sea water conditions and brushes are fabricated based specifically on fouling type, thickness and hardness of barnacles in each area. Prior to the underwater hull cleaning, inspection is carried out in order to determine the fouling condition as well as the type of fouling and based on the findings specialized brushes are fitted on the Brush Kart System.

Onsite/Offshore Services

Our technical team has undergone stringent and rigorous safety, firefighting, First Aid, use of breathing apparatus and helicopter underwater escape trainings to ensure our client's peace of mind. If required, we provide the following services onsite/offshore as well (this includes repair/maintenance/new installation):
• Air-conditioning
• Refrigeration
• Dehumidification
• Retrofitting
• Mechanical
• Modifications
• Pumps
• Electric Motors

Electrical and Instrumentation installation and Maintenance

Based upon the 4 decades of established experience A2Z has, and the combined experience of 100 skilled Companies, A2Z has expanded its service base to include electrical & electronic works. We offer our clients complete automation solutions, along with retrofitting and assisting the client in all their electrical needs.