Elimination of Overwelding - NSRP Project Workshop

Marinelink.com
Monday, September 16, 2013

Technology Transfer Workshop: September 24, 2013, 9:00-11:30am Naval Surface Warfare Center

 

Overwelding is one of the most widespread problems in shipbuilding, causing significant distortion and associated rework costs in lightweight structural applications. In order to combat this problem, modeling and validation testing was performed by the project to determine possible changes to weld sizing design, as well as identify changes to standards which would alleviate the problems which lead to overwelding. This workshop will present the project findings and recommendations for changes to specifications.


Results of the Overwelding Project: Testing of small fillet welds demonstrating higher shear capacities as a result of greater percentage of dilution with base metals and higher cooling rates increasing mechanical strength of the joints.

 

With these results, and knowing the original basis for setting a minimum fillet weld size in an Ingalls ship specification, NAVSEA 05P4 was able to remove the minimum fillet size requirement and subsequently Ingalls was able to reduce design fillet sizes, thereby reducing non-value added weld distortion abatement costs. Testing performed provided the data needed to make changes to Navy fabrication specifications allowing some degree of under tolerance allowance for fillet welding that was not allowed in current specifications. This change addresses issues on the waterfront that lead welders to over weld and in turn apply excessive heat aggravating weld distortion and associated non-value added labor costs to correct. Waterfront welders typically over size required fillets to avoid QA write-ups and subsequent negative findings.


Project Participants: This project was funded by the NSRP and led by Ingalls Shipbuilding with support from: the University of New Orleans, the University of Maine, Concurrent Technologies, Applied Thermal Sciences, and NSWC/NAVSEA.


RSVP by Email by September 20, 2013 There is no fee to attend this event, however attendance is limited to US Citizens. In your email, please include: Full Name (as on your drivers’ license) Phone Number E-Mail Employer Laptop model and serial number in order to ensure a smooth check-in with security. RSVP’s should be sent to David Kihl (david.kihl@navy.mil).

Maritime Reporter August 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Shipbuilding

Chloropac Anti-Fouling Selected for Largest Decommissioning Vessel

Allseas Group S.A., a global offshore pipe installation and subsea construction company, has selected Evoqua Water Technologies’ Chloropac electrochlorination system

SENER Announces the FORAN V70R3.0

SENER announces the new FORAN V70R3.0, available from July 31, 2014. With more than 45 years in the market, FORAN takes advantage of SENER´s innovative development

MN 100: Eastern Shipbuilding Group, Inc.

13300 Allanton Road Panama City, FL 32404 Tel: (850) 522-7400  Email: info@easternshipbuilding.com Website: www.easternshipbuilding.com President: Brian

Navy

Navy Unmanned Aircraft Sets the Bar

The Navy's X-47B unmanned aircraft has completed its final test aboard 'USS Theodore Roosevelt' (CVN 71) and has returned to its home base at Naval Air Station Patuxent River after eight days at sea
,

RIMPAC Exercise Puts LCS Through Paces

It was the middle of May, and the littoral combat ship Independence was operating out of San Diego, testing components of the mine warfare mission package. The mission is one that,

DoD Award Dredging, Ship Maintenance, Charter Contracts

US Department of Defense informs of placement of contracts for Chesapeake Bay dredging, dry-docking of USS Pearl Harbor, and charter of surface escort vessels. Details as follows: 1.

Education/Training

Firefighting at Sea Training Launched

Fighting a fire at sea is one of the greatest dangers facing seafarers. As a result, Videotel, a provider of maritime e-Learning and part of KVH Industries, Inc.

EU Warship Provides Seychelles CG Training

EU Naval Force Warship 'FGS Berlin' has conducted local maritime capacity building in the Seychelles informs EUCAP Nestor. Three Local Maritime Capacity Building

Videotel Updates 'Fire Fighting at Sea' Training

Maritime e-Learning provider Videotel, part of KVH Industries, says that it has launched an updated five-part series 'Fire Fighting At Sea', with the support and

Naval Architecture

Fogal Retires from Zentech After 57 Years in O&G

Robert “Bob” “Sonny” Fogal, Jr., one of the icons in the offshore oil and gas industry, has decided to retire from front-line work as Zentech’s Director of Business Development.

SENER Announces the FORAN V70R3.0

SENER announces the new FORAN V70R3.0, available from July 31, 2014. With more than 45 years in the market, FORAN takes advantage of SENER´s innovative development

New Bulk Carrier Design Puts Ecoships in the Lotus Position

Ecoships, the technical shipmanagement arm of Newport Shipping Group, has introduced a next generation bulk carrier design, developed to set the standard in ecologically

News

Evergreen Upgrades its Intra-Asia Service Network

Evergreen Line announced it will partner with Mariana Express in launching a joint South China- East Malaysia (SEM) Service. The new initiative will give a boost

Bureau Veritas Diversifies with MatthewsDaniel Acquisition

Bureau Veritas announced today that it has acquired MatthewsDaniel Ltd, a global provider of loss adjusting and risk assessment services for the offshore industry.

Fogal Retires from Zentech After 57 Years in O&G

Robert “Bob” “Sonny” Fogal, Jr., one of the icons in the offshore oil and gas industry, has decided to retire from front-line work as Zentech’s Director of Business Development.

 
 
Maritime Careers / Shipboard Positions Naval Architecture Navigation Pod Propulsion Salvage Ship Electronics Ship Repair Ship Simulators Sonar Winch
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.2218 sec (5 req/sec)