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Critical Heat Treatment Jobs completed at GPEL in December 2007.  The biggest news this month is that we have successfully conducted more than 10 batches with our new LPG fired installations in our F-1 furnace. The LPG combustion system is very eco-friendly and we are proud of our small contribution towards keeping the air clean. 
A long-term agreement has now been reached with Hindustan Petroleum for the supply of LPG. We have started the process of converting our other furnaces to the LPG combustion system. During the month a critical post-weld heat treatment of a large component of
a generating set manufactured by Jyoti Ltd. (Vadodara) and re-furbished by Arc
Weld (G.I.D.C., Makarpura) was successfully executed in the presence of the
foreign clients
During the month we had very special guests from Jindal Saw Pipes Ltd., Kosi Kalan (near Agra). The visitors were Mr. Rastogi (Manager, QA/QC) and Mr. Sharma from their head office at Delhi. A very critical heat treatment procedure was discussed for the low-alloy bends manufactured by them for export. The bends' diameter ranges from 24" to 42" and the vertical height is approximately 5 meters. The officers inspected our furnaces and approved our facilities.
1. L & T Powai / Ranoli: Fabricated Jobs weighting approximately 22 M.T. 2. Mixing Chambers of Inconel Metal of G.P.E.C, Paguthan: Turbine Maintenance Jobs We have started upgradation of fuel management system for firing of our furnaces, by installing LPG combustion system, including set of new burners, complete piping and valves. The installation is at a very advanced stage, and the new system should be operational by mid-November 2007. The resulting advantage to the customer's jobs of different carbon steel alloys: Due to very low (less than .003 %) sulfur content, scaling on jobs after heat treatment will be negligible. Heat treatment was done on L &T Ltd. fabricated jobs of special alloy MOC. The job was a heat exchanger consisting of 435 tubes having approximate length of 6 meters and dia with supports of approximate 2.2 meters. Due to criticality of the job, customer required 20 thermocouples at various
points on the job and inside the tubes and The most critical requirement was that during the process of PWHT, the difference between 2 TCs had to be not more than 40 degrees C in order to avoid any differential expansion and contraction between the outer 30 mm thick shell and inside tube having only 2mm thickness. Soaking temperature was 680 degrees C to 700 degrees C, and the soaking period was 2 hours. In view of all above critical factors, the duration of batch was of 60 hours, without any break. We successfully completed the batch, without any distortion on tubes and on the job. It was completed in the presence of L & T inspection authorities from Powai and Ranoli. G.P.E.C. Inconel Mixing Chambers jobs are in progress. |
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of Jyoti Ltd. We will be handling four more similar jobs for Jyoti Ltd. 
additional 24 thermocouples were
provided as standby installation.