What makes this project unique is that the close coordination and carefully engineered lifting operation among HPCL, L&T and Mammoet made possible to overcome logistical and operational challenges without compromising safety and schedule.
Mammoet lifted five major components at three different lifting positions: two columns at Crude Distillation Unit (CDU) and Vacuum Distillation Unit (VDU), followed by three reactors and other lighter columns at Full-Conversion Hydro-Cracker Unit (FCHCU). Stage one reactor at FCHCU area weighs 1,646 tonnes, being the heaviest reactor ever installed in India. Relocation of a 3,000 tonnes class crane is already a big operation by itself. With support from L&T, Mammoet took the modularised transport approach by moving the crane in big blocks to expedite the two relocation activities.
Another ingenious solution is a 2,000Te capacity tailing frame, mounted on SPMT (self-propelled module transporter). For lifting of the stage one reactor, none of the cranes on site had a sufficient lifting capacity to function as a tailing crane for MSG80. Bringing in a heavy-duty crane just for one lift was not an economical solution on top of the fact that the site was a highly congested area with no practical space to place such a large tailing crane.
“Mammoet provided good mix of the solution with a main crane strong enough to lift all the heavy items for the project, and the in-house designed tailing frame on SPMT that eliminated the need of a heavy-duty tailing crane and saved its space. This significantly improved our overall cost efficiency and productivity of the surrounding construction activity” says V Muthuraman, deputy general manager of plant and machinery, L&T Hydrocarbon Engineering.
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