Overhauling and Renewal of Valves at various location on INS DHRUV

Amount

THE FOLLOWING VALVES TO BE REMOVED,BLANKED PIPE LINES,SHIFTED TO WORKSHOP,DISMANTLED ALL PARTS,CLEANED,INSPECTED, OVERHAULED, REPLACE THE DEFECTIVE PARTS,PAINTED,BOXED BACK,PRESSURE TESTED AND FITTED IN POSITION,VALVE GEAR OPERATION TO BE OVERAHULED,SATISFACTORY OPERATION TO BE SHOWNED TO SURVEYOR AND SHIP STAFF.ALL CONSUMABLES,MS BLANKS,NEOPRANE JOINTS,GM LIDS AND SEAT MACHINING WORKS,GREASE,WRAPING SHEETS,WASHERS ,SS FASTENERS(SS304),BRASS SEAT RINGS,GLAND PACKING,GLANDS, SPINDELS,VALVE WHEELS,RUBBER SEAT MOULDINGS,NEOPRENE RUBBER COATING INSIDE THE VALVES,VALVE GEAR BOX PARTS,PAINT,TEFLON SEATS ARE PROCURE,SUPPLY AND FITMENT COVERED IN CONTRACTOR SCOPE.ALL MACHINING WORKS,PULLERS,WELDING AND BRAZING WORKS ARE COVERED IN CONTRACTOR SCOPE. CONTRACTOR HAS TO EXECUTE COMPLETE BELOW SCOPE OF WORK (VALVES OVERHAULING & REPLACEMENT) AS PER TERMS AND CONDITIONS MENTIONED IN ANNEXURE-A TO THE SATISFACTION OF SHIP STAFF & HSL.

Sea tube suction valves of AC Plant found defective/not holding.To be overhauled Type-Butterfly,Dia-200mm;

Condenser sea water suction valves of AC Plant found defective/not holding. To be overhauled Type-Butterfly,Dia-150mm;

Following valves found defective and to be overhauled:

(a) AFFF isolation valve for helodeck found defective. Dia-65mm

(b) AFFF isolation valve for hanger top found defective. Type-Ball, Dia-125 mm

Discharge valve of Ballast pump 4 found not holding. Valve to be Overhauled. Type-Butterfly,Dia-250mm

Following valves in bilge system found defective and to be overhauled: - (a) Bilge suction valve of MER. Dia-150mm, Type-Butterfly, Qty-03 (b) Bilge suction valve of AMR 3. Dia-150mm, Type-Butterfly, Qty-02 (c) Bilge suction valve of AMR 1. Dia-150mm, Type-Butterfly, Qty-03 (d) Bilge pumps suction valve, Dia - 150mm, Type - Butterfly Valve, Qty - 04

Suction and Discharge valves of chilled water pump of all AC Plant found defective view material degradation. Valves to be overhauled. Type-Butterfly,Dia-150mm

Fuel return line isolating valve( Ball Valve, 25 mm) of port and Stbd DA not holding. Valve to be overhauled

Following sea water system valves of Combat DAs not holding: -

(a) SDNR Valve, 80mm; Valve to be overhauled.

(b) Emergency line Butterfly valve, 150mm, Valve to be overhauled

(c) PDA Alternator discharge SDNR valve, 50mm, Valve to be overhauled.

(d) All three DA butterfly suction valve, 125 mm, Valves to be overhauled

Air leakage observed from gland of Port and Stbd combat DA starting air system valve(Screw Down Valve, 40 mm). Valve to be overhauled

Following sea water valves in Firemain pumps defective and to be overhauled: - (a) Fire pump 3 suction valve. Type-Butterfly,Dia-200mm (b) Fire pump 9 suction valve. Type-Butterfly,Dia-200mm (c) Fire pump 7 suction valve. Type-Butterfly,Dia-200mm

Emergency cooling valve in passage way 13 & 15 found defective. Valves to be overhauled Type - SDNR, Dia - 150mm

Foot valve of fresh water tank 4, 5 & 6 not holding. Foot valves to be overhauled.

Discharge valve of Main Engine Sea water Pump 1 malfunctioning. Valve to be overhauled. Size - 250 mm. Type - SDNR.

Following valves of sea water system to be overhauled: -

(a) 200 mm Butterfly Valve, Mat - NAB

(b) 50 mm Butterfly Valve, Mat - NAB

(c) 32 mm SDNR Valve, Mat NAB

(d) 65 mm SDNR Valve, Mat - NAB

(e) 15 mm Ball Valve, Mat - NAB

(f) 40 mm Ball Valve, Mat - NAB

Condenser inlet valves of Ref Plant 3 found defective. To be overhauled. Type-Butterfly,Dia-50mm

Following Valves in fresh water system found defective and to be overhauled: - (a) Suction valve of fresh water pump 3.Type-Butterfly,Dia-45mm (b) Suction valve of fresh water pump 4.Type-Butterfly,Dia-45mm (c) Discharge valve of fresh water pump 3 .Type-Butterfly, Dia-40 mm (d) Discharge valve of fresh water pump 4.Type-Butterfly,Dia-40mm (e) Suction valve of fresh water pump 1. Type-Butterfly, Dia-45 mm (f) Discharge valve of fresh water pump 2. Type-Butterfly, Dia-40 mm (g) Hydrophore drain valve of Fwd hydrophore tank. Type-Butterfly, Dia-40 mm

63 valves of fuel transfer and bunkering system found defective/ not holding view material degradation in valves.To be overhauled. Size - 250 mm, Type - Butterfly

Leakage observed from filling valve of AVCAT Tank 2. Suspect rubber molding deteriorated. To be overhauled Type - Butterfly. Dia - 80 mm.

Isolating valve in fuel system in AMR2 (main discharge line 250mm) to be fitted(Valve HSL Supply)

NEW VALVES REPLACEMENT

THE FOLLOWING VALVES ARE TO BE PROCURED,SUPPLIED AND FITTED ON BOARD WITH NEW GASKETS AND SS FASTENERS,VALVE OPERATION SHOWNED TO SHIP STAFF.ALL CONSUMABLES,SS FASTENERS(SS304),NEOPRANE GASKETS,OIL JOINTS ARE PROCURE,SUPPLY AND FITMENT COVERED IN CONTRACTOR SCOPE.

Inlet/ outlet valve(Ball valve, 1/2 inch) of HP air bottle malfunctioning. Valve to be replaced with heavy duty valve test pr. 300 bar PN320

Fitment of separate overboard pipeline with an Gun metal isolating valve (Qty-1, Size-80mm, Butterfly) to be undertaken for isolating interaction between sea water systems of Center & Stbd DA. Modification entails piping corrections and fitment of following items: - (a) Gate Valve, NB - 125 mm, Gunmetal Qty - 01 (b) SDNR Valve, NB - 150mm,Gunmetal Qty - 01

STP And RO plant sea water pipe line isolating new valve to be provided size: NW 40 Gunmetal - 02 no

GOKUL ENGINEERING ASSOCIATES

KRYSTAL ENGINEERING TECHNOLOGIES

Sri Balaji Marine and Civil Engg Works

SRI SAI KRISHNA WORKS