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
A first for Liebherr in the USA
(Posted on 18/02/20)North Carolina Ports has opted for a new Liebherr portals lewing crane type LPS 420. Themulti purpose... Read more
Inmarsat’ new Saudi connectivity services
(Posted on 18/02/20)Inmarsat, the world leader in global, mobile satellite communications, has announced that it will bring... Read more
Zero dust In Townsville
(Posted on 14/02/20)The port of Townsville is booming with volumes metal concentrates. The Australian port is located near... Read more
Don’t forget fire-fighting
(Posted on 14/02/20)Shipowners looking to retrofit marine exhaust gas cleaning systems as a way of complying with new sulphur... Read more
UWC certification for hopper cars
(Posted on 14/02/20)Research and production corporation United Wagon Company (UWC), the largest producer of freight cars... Read more
AVEVA’s new design software
(Posted on 13/02/20)AVEVA, global leader in engineering and industrial software, has announced an important update to its... Read more
3D printing revolution
(Posted on 13/02/20)Online e-procurement portal for marine spares and equipment ShipParts.com is taking part in a project... Read more
Liebherr giant headed for China
(Posted on 02/02/20)The LH 150 ET Gantry Port Litronic is not only the first electrically-operated port handling machine... Read more
New market for Ecolifting
(Posted on 31/01/20)In the last quarter of 2019, Rhenus Logistics B.V. (Rhenus) ordered an eco-efficient Konecranes Gottwald... Read more
WinGD advances clean fuel research
(Posted on 31/01/20)WinGD (Winterthur Gas & Diesel) has bolstered its investment in fuel research with the development... Read more
