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New Underwater Welding Process Approved By LR

Lloyd's Register of Shipping has reportedly given approval to a new process of underwater welding developed by U.K.-based UMC International Pic for permanent repairs to the shell plating of a ship. The technique allows defective areas of shell plating to be cut out and replacement insert plates to be welded into place beneath the waterline while ships are afloat, which is accomplished by the creation of an air-filled void space underwater in was of the defect.

UMC's process overcomes the necessity of welding from both the inside and outside by employing a combination of Tungsten Inert Gas (TIG) and conventional welding, using low hydrogen electrodes to overcome the difficulty. The repair is then examined using ultrasonic and magnetic particle examinations.

UMC's Managing Director David Jones explained: "Getting a welder who is a diver or putting a ship into drydock for repair are both expensive. This new method uses the specialist skills of diver and welder and effects a permanent repair from inside the ship ... It also overcomes the traditional reluctance of classification societies to accept any form of underwater welding for permanent repairs to shell plating. We expect other classification societies to follow Lloyd's in approving this new technique shortly." For more information on UMS International Pic Circle 115 on Reader Service Card




Ship Repair History

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ASRY Improves Performance In 1993
Astilleros Espanoles To Convert Tanker To FPSO
AWSC 1993 Annual Report
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BethShip Sparrows Point Expands Orderbook
BethShip W i n s $ 3 4 Million Contract
BoatLIFE Offers Deck Protection Experience, Products To Cruise Ship Industry
Boxship Business Booming
Companies In Southern Region Of U.S. Adjust Product, Market Focus To Remain Competitive
Consolidation Of Resources
Del Gavio Marine Hydraulics, Inc.
Drew Ameroid Marine Forms CFC Conversion Alliance With York Marine Systems
FPSO And Cruise Ship Work Dominate Repair Market
FRATELLI ORLANDO . . . . . . Resurgence of shipbuilding in Livorno
Impact of Propulsion Plant Choice On Maintenance
Keppel Cairncross Completes A Number Of Ship Repair Operations
Keppel Joint Venture Results In Australia Yard Opening
Lisnave Wins Multi-Million$ Contract
Making It A Clean Sweep
Norshipco Completes Work On Double-Hull Tanker Stena Concertina Acquire Air & Water Technologies Unit
Portland's Ship Repair Business Strengthened With Cascade General Sale
Qualify, Quantity Issues Abound
Ship Repair & Conversion '93
Ship Repair & Conversion '94
Southwest Marine Inc. Expands Into New Market President And CEO
Tracor Signs Agreement To Sell Division To SIMCO
Welding Technique Helps Navy Save Millions
 
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