09-11-2012, 05:07 PM
Underwater Welding and Non-Destructive Testing in Support of U.S. Navy Ship Repair Operations
Underwater Welding.pdf (Size: 1.09 MB / Downloads: 126)
Overview
• Since 1985, NAVSEA approved underwater welding has supported the Fleet.
• NAVSEA’s Office of Supervisor of Salvage and Diving – Underwater Ship Husbandry Division (00C5) has led the development of this capability.
• In the past 4 years alone, NAVSEA 00C5 has executed 67 underwater welding repairs on CVNs, FFGs, DDGs, and SSNs.
History
•1930’s: Russian metallurgist Konstantin Khrenov made the first underwater weld - in lab tests.
•1940’s: Underwater welding advanced through WWII, particularly during Pearl Harbor salvage ops.
•1970’s: Whitey Grubbs and Dale Anderson of Chicago Bridge & Iron (CB&I) qualified an underwater wet welding procedure to American Welding Society (AWS) standards.
Wet Welding - Today
• NAVSEA approved WET welding procedures:
• Group S-1 carbon steels, ordinary and high strength to include:
•ASTM A 515 Gr. 70
•MIL-S-15083 Gr. B
•MIL-S-22698 DH-36
•MIL-C-24707/1 ASTM A757 Gr. A1Q, A2Q, HTS.
• Group S-11A Quenched and Tempered Alloy Steels to include:
•MIL-S-16216 HY-80
• Additional wet welding procedures are pending NAVSEA approval
Conclusion
• Underwater welding – a NAVSEA approved ship repair capability since 1985.
• Offers a technically sound and cost effective ship repair alternative – with minimal impact to ship operational schedules.
• NAVSEA 00C provides onsite technical expertise and experience – for all underwater welding operations.
• NAVSEA underwater welding and NDT is a proven capability - through 25 years of success in supporting the Fleet.