design, engineering, manufacturing, procurement of materials and bought out components, assembly at shop, testing at manufacturers works, inspection by tpia, packing, supply of shell and tube heat exchangers , vacuum tower bottoms steam generator ( thermal, hydraulic and mechanical design along with guarantees are required ) ( 1 lot consist of all six nos tags 1p30-e-2056 a to f ) , hvgo / lcf feed exchanger ( thermal, hydraulic and mechanical design and guarantee is required ) ( 1 lot consist of all two nos tags 1p30-e-2156 a -b ) , bfw trim cooler , fractionator pa steam generator , deethanizer reboiler , naphtha stabilizer reboiler , mp / ht vapor / hos feed exchanger , diesel stripper reboiler