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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

A Stitch In Time... Metal Stitching Technology Helps To Cut Costs, Keeps Vessels Sailing
AWSC 1993 Annual Report
Bender Shipbuilding And ENSCO Drilling Christen Drilling Barge
BoatLIFE Offers Deck Protection Experience, Products To Cruise Ship Industry
Consolidation Of Resources
Del Gavio Marine Hydraulics, Inc.
Dutch Builders Enjoy Influx Of International Orders
frinity Acquires Plotter Yard In Houston
HHI Starts ' 97 Strong Korean yard wins bulker contract from Norway's Bergesen to start year
Keppel Cairncross Completes A Number Of Ship Repair Operations
Kepphil Shipyard Delivers First Of Two Tankers
Lisnave Reports Upbeat Quarter; Discusses Future Plans
Making It A Clean Sweep
McDermott Completes First Year In Mexice
NASSCO Invests In Technology To Capture Commercial Business
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Norshipco Completes Work On Double-Hull Tanker Stena Concertina Acquire Air & Water Technologies Unit
Norshipco Repairs Navy Swath Ahead Of Schedule
Petrobras Block Booking For ASRY
QE2 Refit Completed In Southampton
Quality, Diversity Drive Atlantic Marine Holding Co.'s Success
Renovation Of Inland Service Tug Completed
Revenue And Profitability Gains Reported By ASRY
Shell Commits To Yard In Repair Arrangement
Ship Repair & Conversion '93
Sperry Marine
U.S. Northwest: Ship repair Activity Picks Up
Unitor Introduces Shipboard Polymer Repair System
Vietnam Government Approves Keppel/BaSon Joint Venture Shipyard
Wheeler Becomes U.S. Agent For Romanian Yard
 
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