Hydrex’s grade A approval
(Posted on 08/01/20)
Hydrex has received the approval to carry out classification certified grade A wet welding. To guarantee the required high standard of these underwater welds, NDT tests were performed by ABS surveyors before the certificate was awarded.
The certificate was given to carry out grade A groove welding underwater. Most companies with a wet welding certificate can only carry out fillet welds and this often only to grade B or C. Cavitation or corrosion damage on rudders, clad welding, rope guard repairs, mewis duct repairs, … can now be done with permanent welding.
With a class B weld an inspection of the weld is required every three months. With class A welding the deadline for an inspection is much longer. This is decided by the attending surveyor on a case by case basis.
Any required inspection will be for the underlying problem causing the damage and not for the welding work. An internal structural problem causing damage will not always be handled after the repair and will need to be followed up. For instance, doubler repairs can never be permanent because the doubler is installed over the damaged plating instead of replacing it (as is the case with insert repairs).
With class A underwater welding only a note is made stating that the affected area needs to be looked at during the next scheduled inspection. This is very important for tankers as a clean class certificate is requested by most charterers.
Even for non-class items like rope guards the certificate is useful because it shows our customers that our diver/welders can carry out high quality underwater welding work. This is very important for offshore units where high quality standards need to be verified before welding operations like doubler repairs can be performed.
Hydrex divers are not suddenly better welders. They always knew how to perform the best underwater welds. Their skills have now been officially recognized.
Latest News
OrbitMI launches enhanced Data-as-a-Service for dry bulk
(Posted on 22/07/24)OrbitMI has announced the launch of its latest Data-as-a-Service (DaaS) offering, tailored specifically... Read more
Flexicon marks 50 years
(Posted on 22/07/24)Flexicon Corporation, a privately-held firm and world leader in bulk handling equipment and systems,... Read more
Siwertell ship loader order for high-capacity fertilizer handling
(Posted on 16/07/24)Bruks Siwertell has secured an order for a Siwertell ship loader type-1A from Libyan Fertilizer Company... Read more
ECOsubsea invests in Singapore with NOK 35m from Innovation Norway
(Posted on 16/07/24)It is a climate and environmental problem that ship hulls are not cleaned often and gently. After being... Read more
ECOsubsea invests in Singapore with NOK 35m from Innovation Norway
(Posted on 16/07/24)It is a climate and environmental problem that ship hulls are not cleaned often and gently. After being... Read more
Berge Neblina sets sail with four carbon-saving rotor sails
(Posted on 12/07/24)Berge Bulk has announced the successful installation of four emissions-reducing rotor sails on Berge... Read more
Wärtsilä simulators to support Singapore's Wavelink Maritime Institute
(Posted on 12/07/24)Technology group Wärtsilä has supplied its new dual-fuel engine simulator technology for Wavelink... Read more
Oulu extends cargo handling with Konecranes Gottwald
(Posted on 04/07/24)The Finnish Port of Oulu has ordered a Konecranes Gottwald ESP.7 Portal Harbor Crane to improve cargo... Read more
Intergis adds flexibility in South Korea with Konecranes Gottwald Gen 6 MHC
(Posted on 28/06/24)Intergis Co., Ltd ordered a Konecranes Gottwald ESP.5 Mobile Harbour Crane to improve its bulk and general... Read more
Live freight rate visibility across routes and maturities
(Posted on 28/06/24)AXSMarine, a pioneer and market leader in the provision of advanced solutions and market intelligence... Read more
