Cleveland Cascades LtdPort of South LouisianaVan AalstBühler GmbHSailors SocietyCimbria
  • Sailors Society
  • Bühler GmbH
  • TBA Group
  • Cimbria
  • Vigan
  • TOC Events

Hydrex’s grade A approval

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

Technomar partners with OTG to deliver next digital learning phase

(Posted on 05/12/22)

Technomar Shipping Inc, a leading Greek owned ship management company, has confirmed that it has signed... Read more


MacGregor introduces electric transloading crane

(Posted on 05/12/22)

As part of its mission to support customers with more sustainable products and solutions, MacGregor... Read more


ClassNK issues AiP for dual fuel generator engine using hydrogen gas

(Posted on 01/12/22)

ClassNK has issued an Approval in Principle (AiP) for a dual fuel generator engine using hydrogen gas... Read more


Voyager automates demurrage process to deliver faster calculations

(Posted on 29/11/22)

Voyager Portal has launched a new web-based tool for optimising the often complex demurrage process,... Read more


Wärtsilä partners with cleantech start-up Hycamite

(Posted on 29/11/22)

The technology group Wärtsilä has entered into a joint development agreement with Hycamite... Read more


New digital advance delivers expert knowledge to bulk operators

(Posted on 19/11/22)

Bruks Siwertell is developing an advanced digital tool, Siwertell Smartview, as part of an ongoing research... Read more


Superior plans 250 tons of display product at CONEXPO-CON/AGG

(Posted on 19/11/22)

Superior Industries, Inc., a US-based manufacturer and global supplier of bulk material processing and... Read more


Seamanship and navigation e-learning content expanded through partnership

(Posted on 13/11/22)

Insufficient knowledge of seamanship and navigation when taking a ship out to sea or coming alongside... Read more


Industry veteran Kelly joins Superior Industries

(Posted on 13/11/22)

Superior Industries, Inc., a US-based manufacturer and global supplier of bulk material processing and... Read more


Liebherr LHM 550 adds to bulk handling capacity in Arendal

(Posted on 09/11/22)

Located in the southern part of Norway between Larvik and Kristiansand, the Port of Arendal is the biggest... Read more


ViganPort of StocktonThe Wolfson Centre for Bulk Solids Handling Technology TBA GroupTOC EventsTelestack
  • Port of Stockton
  • The Wolfson Centre for Bulk Solids Handling Technology

Subscribe to our newsletter

Keep up to date with the latest global news in bulk cargo handling and shipping