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1.1 Welding is the single major manufacturing operation at the High Pressure Boiler Plant Unit of Bharat Heavy Electricals Limited (Tiruchy Unit). Presently, 1,00,000 tonnes of components per year-(pressure parts and non-pressure parts for boilers and boiler house auxiliaries)- are being fabricated both at BHEL Works and sub-contractors' works. BHEL alone employs about 750 welders of whom nearly 200 are high pressure welders.
1.2 Planning and co-ordinating these welders' activities and associated welding equipment is a vital function and depends on the time estimation for carrying out various welding operations.
The weldwg group of the National Committee on Science and Technology (NCST) reports that in India, presently 95% of the total weld metal deposited is by Manual Metal Arc Welding (MMAW) using coated stick electrodes and forecasts that even after 10 years from now, this will remain at 90%.
In this context, this paper briefly explains some of the factors that will contribute for improving productivity and bringdown the cost of welding by MMAW process.
