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Kulkarni, Dileep
- Message from the Chairman, Technical Committee
Authors
Source
Indian Welding Journal, Vol 47, No 2 (2014), Pagination: 24-24Abstract
The Indian Institute of Welding is hosting the International Congress of the International Institute of Welding for the third time on 09 April to 11 April 2014. The first ever International Congress was held in India at Mumbai in 2005 which was followed by another at Chennai in 2008. In 2011 IIW-lndia hosted the Annual Assembly and International Conference of the International Institute of Welding at Chennai. While we can see this as a recognition of importance of Indian welding community, it is clear that we have much to do and should not be complacent. India must have continuous and active participation in all IIW events. We must reap all the benefits which accrue from participation in standardization activities in a globalized economy while contributing positively to the total discourse.Full Text
- Welding in Heavy Industries-An Indian Perspective
Authors
1 Larsen & Toubro, Powai, Mumbai - 400 072, IN
Source
Indian Welding Journal, Vol 47, No 2 (2014), Pagination: 79-86Abstract
Heavy equipment manufacturers are continuously facing challenges to meet three most important project requirements - Quality, Cost&Delivery. Welding being one of the major operations in heavy engineering industries, welding technologists have to come up with new developments to cope up with these challenges. In order to counter these challenges, significant improvements are taking place in the field of welding and allied areas all over the world. Developments in materials are leading to complementary developments in welding consumable and process technology to weld these materials. Higher productivity processes are being implemented; existing processes are being fine-tuned to make them more efficient. Improvements in quality are being achieved by increased use of automation. Reliability of construction is ensured by the use of advanced NDT techniques. Similar developments are taking place in welding equipments and accessories to improve their efficiency. This paper presents an Indian perspective of developments that have taken place in welding and allied areas in heavy industries.Keywords
Heavy Engineering, Automation, Productivity, Welding, Steels.
- Welding of Naval Brass using GMAW process
Authors
1 L&T, HED-Powai, IN
Source
Indian Welding Journal, Vol 41, No 4 (2008), Pagination: 18-21Abstract
Carbon steel tube sheet of a Turbine surface condenser was planed with explosive bonded brass at shell side, as the working medium was seawater, Diameter of tube sheet is more than three meter and the maximum brass plate available was not able to meet size requirement making weld joint unavoidable in brass plate. Manufacturing cycle of tube sheet includes joining of two halves of brass plate, explosive bonding of brass plate on carbon steel and then cutting clad plate to make required size of tube sheet.
Naval brass grade UNS SB 171 C46400 selected as brass plate and planned for import from UK with a cycle time of 8 weeks followed by welding and explosive bonding at Orissa, India. After completion of bonding & Ultrasonic testing, tube sheet will be brought to Mumbai works for cutting followed by 8560 nos. Tube hole drilling on deep hole drilling machine and the final gasket face machining. The critical path is clear as Tube sheet, which is making hurdle in the timely delivery of the project. Over and above the tight manufacturing schedule. Weld joint of Naval Brass (Cu:Zn 60:40) needed to be porosity free to clear final DP test and to sustain the impact during explosive bonding.
Extensive trials taken before start of production welding followed by Procedure qualification. Job of welding total 30 meters of 13 mm thk naval brass completed within 12 days time as per schedule depositing 64 kg of weld metal using track mounted GMAW process.
The work undertaken exhibits that Naval Brass weld joints, when welded with automated process and with optimum duilution can give acceptable radiographic quality weld joints.