bids are invited for custom bid for services - 2122 426 total lumpsum amount for total estimated qty including gst for lumpsum charges for removal and erection of plate heat exchangers as per sow , custom bid for services - total lumpsum amount for total estimated qty including gst for removal and erection of ms teflon casting pipe lines of size 10 8 6 4 3 2 as per sow , custom bid for services - total lumpsum amount for total estimated qty including gst for removal erection of sscs lines of size 10 8 6 4 3 2 as per sow , custom bid for services - total lumpsum amount for total estimated qty including gst for fabrication erection of ss pipe line of size 10 8 6 4 2 as per sow , custom bid for services - total lumpsum amount for total estimated qty including gst for fabrication and erection of cs pipe line of size 10 8 6 4 2 as per sow , custom bid for services - total lumpsum amount for total estimated qty including gst for structural steelfabrication erection as per sow