Overhauling of Coolers and Heat Exchangers on DCI DREDGE XVII

Amount

Overhauling of coolers & heat exchangers. The scope of work includes procure and supply of required chemicals, consumables like bolts & nuts, gaskets, zinc anodes by vendor. Contractor should be in a position to mobilise and start the work within 2 days. Contractor havifng valid experience in execution of similar works will only be considered. The contractor shall have to engage men on round the clock basis and also on sundays and holidays.

COOLERS OVERHAULING: Overhauling of coolers/ Heat exchangers. Type : Plate type/Shell & tube type The following Plate / shell & tube type Coolers are to be dismantled from position by removing all connections and transported to Workshop. After chemical cleaning / overhauling, pressure testing(1.5 times of working pressure) to be carried out , Inspect for any damages to tubes/plates and renew defective ones and renew the gaskets as required. Cooler body to be painted, coolers are to be fitted back with all connections and satisfactory trials to be shown to ship staff.(quote should be inclusive of chemical cost,consumables,bolts & nuts,sealants).Anodes to be replaced and to be supplied by vendor.OEM spares gaskets will be supplied by ship

a) H.T. Coolers: Make-AMW, Type K MG-10/2, Capacity-2020 KW, Mass-510 KG.Size: 1200 mm. X 600 mm,No. of Plates: 33 each

b) L.T. Coolers (E/R) : Make-AMW, Type-R55 MSG-10/3, Cap-1820 KW, Mass-860 Kg.Size: 1800 mm X 720 mm.No. of Plates: 107 each

c)LT cooler to be removed from place for renewal of deck plate below the cooler and re fitted back after steel renewal, inlet and out let pipes to be removed and refitted , rubber joints and nut and bolts to be renewed, vendor supply

d)L.T. Coolers (Ford m/cnry)-2 nos & Harbour Cooler-1 no. : Make-AMW, Size: 1525 mm X 450 mm X 31 plates

e) Hyd Oil Coolers 1 no. : Make-AMW, Size: 1525 mm X 450 mm X 31 plates

e) Harbour Fresh water cooler Size Dia 200 X 500

MAIN ENGINE (Type-6L 40/54), CHARGE AIR COOLERS: Cooler Size-700 mmx810 mmx 1410 mm (i) Open the Port & Stbd. Main Engine Scavenge Air Coolers take out from position after removing of all pipe connections, transport to workshop and clean the air coolers in a tank with ACC-9 chemical vendor supply) or equivalent in the ratio of 1:2. Agitate the chemical & water mixture with L.P. air. Pressure test Coolers to 3 Kg/Sq.Cm. Defective tubes to plug if required (Plugs Cost and supply by vendor). After completion of cleaning, the cooler end cover to be cleaned of oil & dust stains & painted, transport back to ship fitted with new HT bolts with washers (vendor supply) and gaskets/joints. Any broken bolts to be extracted and threads re-tapping. Unit to put back and satisfactory operation to be shown.

MAIN ENGINE (Type-6L 40/54), CHARGE AIR COOLERS: Cooler Size-700 mmx810 mmx 1410 mm (ii) Mechanically clean air cooler housings and paint.Size: 1420 mm x 1900 mm x 1000 mm.

MAIN ENGINE LUB OIL COOLERS To Overhaul, Make-AMW, output-650 kW, Mass-1670 kg.370,Type-A-085 MGS-10/3, Size : 2139 X 720 X 131 plates (i) ME Lube Oil Cooler to be removed from position disconnection all lines, cleaned and overhauled, damaged gaskets to be renewed with ships spares. Unit to be pressure tested and fitted back in position. Cooler end plates to be cleaned and painted. Work to be completed to the satisfaction of shipstaff. SME LO Cooler leaking same to be attended.

GHR Marine Training & Certification Services Pvt. Ltd.

SRISAI OILFIELD EQUIPMENTS AND MARINE SERVICES PVT LTD

SHRI GURUDATTA ENGINEERING WORKS

SRI BALAJI MARINE & CIVIL ENGINEERING WORKS

NASS Engineering Services Pvt Ltd