SHIPYARD PLANNING FORBWTS RETROFIT ON TANKERS

For

INTERTANKO

By

SAUVIR SARKARSENIOR MANAGER – ASRY NEW CONSTRUCTION & ENGINEERING DIVISION

Graving DockLength: 375mWidth: 75mDepth: 8.85mCrane capacity: 1 x 100mt

1 x 15mt

Yard statsCurrent working area: 1,155,500 m2Alongside berths: 15Total berth space: 4.04 kmDepth: 8 – 11m

Floating Docks Length: 227m 252mLength, keel blocks 210m 235mWidth btw wing walls: 40m 44mDepth (abv keel blks): 9.7m 9.7mDock lift capacity: 30,000mt 30,000mtCrane capacity: 3 x 12mt 3 x 12mt

SlipwaysLines: 2

Rail span: 8m

Total length: 512m

Lifting Capacity:5,000mt

TotalDryLength: 255m

Max vesselSize: 140 x 20m

AGENDA

• BWTS CHARACTERISTICS ON TANKERS

• NEED FOR PLANNING

• STEPS TO PLANNING

• EXAMPLES AND EXPECTED RESULTS ON TANKERS

• SUMMARISING KEY ISSUES

CHARACTERISTICS - BWT SYSTEM ON TANKERS

BWTS CHARACTERISTICS ON TANKERS

LARGE SYSTEM SIZE –(A VLCC COULD BE AS BIG AS 2 X 3500 CUM/HR)

MULTIPLE SYSTEMS –(MOST LIKELY A SEPARATE SYSTEM REQUIRED FOR AFTPEAK)

SPACE CHALLENGE –(LIKELY DUE TO LARGE SIZE OF BWTS AND MULTIPLE SYSTEMS)

EX TYPE -(WHEN INSTALLATION IS IN PUMP ROOM OR DECK)

SEPARATE COMPARTMENT –(WHEN INSTALLATIONS ARE ON PUMPROOM LESS TANKERS)

BWTS CHARACTERISTICS ON TANKERS

VARIOUS BWT SYSTEM TYPES AVAILABLE FOR FITMENT

TYPICALLY THE FOLLOWING SYSTEM TYPES ARE COMMON

- UV BASED SYSTEM

- ELECTROLYTIC/ CHEMICAL BASED SYSTEM

- CAVITATION BASED SYSTEM

- DEOXYGENATION BASED SYSTEM

SOME OF THE SYSTEMS CAN BE INTEGRATED TO EXISTING SYSTEMS (Eg IG system)

WHY PLAN AN INSTALLATION AHEAD

WHY PLAN AHEAD – ISSUES ?

WHICH SYSTEM TO CHOOSE.

WILL IT WORK IN ALL OPERATIONAL AREAS OF THE TANKER?

DOES THE SYSTEM HAVE ALL THE NECESSARY APPROVALS

WHERE DOES ONE PLACE THE SYSTEM IN THE SHIP

WILL THE EXISTING BALLAST PUMPS COPE UP WITH THE INSTALLED SYSTEM

WILL THE EXISTING GENERATORS COPE WITH THE ADDITIONAL LOAD

WHICH SHIP SYSTEMS WILL THE INSTALLATION IMPACT ON.

WILL THE PRINCIPAL CHARATERISTICS OF THE SHIP CHANGE

WHAT IMPACT AND HAZARDS THE SYSTEM MAY CAUSE

WHY PLAN AHEAD – OTHER ISSUES ?

RETROFITS REQUIRE THE EQUIPMENT TO BE PLACED WITHIN AVAILABLE SPACE PREFERABLY CLOSE TO THE BALLAST PUMPS

HOW WILL CLASS APPROVALS BE ENSURED

HOW CAN ONE REDUCE THE TIME OF INSTALLATION

WHAT PRE-INSTALLATION ENGINEERING CAN BE CARRIED OUT

HOW CAN MOST FABRICATION BE CARRIED OUT PRIOR VESSEL’S ARRIVAL AT REPAIR YARD.

HOW CAN INSTALLATION, TESTING AND COMMSIONING BE CARRIED OUT IN THE SHORTEST POSSIBLE TIME.

HOW TO ENSURE THAT ALL SHIP SYSTEMS FUNCTION & THE VESSEL PERFORMS TO CHARTERER REQUIREMENTS

STEPS TO PLANNING

STEP 1 – OWNER TO DEFINE A FRAMEWORK

FOR SHIPYARD TO COMPLETE PLANNING, OWNERS MUST DEFINE A FRAMEWORK COVERING FOLLOWING ASPECTS

a) ANY SPECIFIC MAKERS THAT SHOULD BE CONSIDERED.

b) GEOGRAPHICAL AREAS WHERE MAKERS SHOULD HAVE PRESENCE.

c) ANY SYSTEM TYPES THAT SHOULD NOT BE CONSIDERED. (Eg No active substances, etc).

d) ANY SPECIFIC APPROVALS REQUIRED (Eg US Coastguard etc)

e) ANY SPECIFIC OPERATIONAL REQUIREMENTS (Eg Ballast/ Deballastminimum frequency, Operation in Fresh water etc)

STEP 2 – ESTABLISHING THE SHIPYARDESTABLISH A LONG TERM PARTNERSHIP WITH A SHIPYARD, HAVING FOLLOWING CAPABILITIES

a) PRESENCE IN THE GEOGRAPHICAL AREA WHERE THE VESSEL OPERATES

b) CAPABLE OF SHORTLISTING MAKERS IN AN IMPARTIAL MANNER

c) HAVE STRONG ENGINEERING SETUP, WITH FACILITIES FOR 3D SCANNING AND 3 D ENGINEERING.

d) HAVE STRONG RELATIONSHIP WITH MAKERS & CLASS SOCIETY.

e) ABILITY OF PRODUCING ENGINEERING OUTPUTS FOR EACH SHORTLISTED MAKER, FOR IDENTIFYING THE MOST EFFICIENT INSTALLATION.

e) ABILITY OF PRODUCING, PRODUCTION INFORMATION AND ENSURING TURNKEY DELIVERY IN THE SHORTEST TIME.

STEP 3 – PRE INSTALLATION ENGINEERINGRECEIVE RELEVANT VESSEL DRAWINGS AND INFORMATION FROM MAKERS.

ARRANGE SHIP INSPECTIONS/ 3 D SCANNING AND ARRIVE AT OPTIONS FOR PLACING EQUIPMENT.

CREATE ENGINEERING OUTPUTS FOR EVERY SHIP, FOR EACH SHORTLISTED MAKER.

ANALYSE PERFORMANCE OF SYSTEM FOR EACH SHORTLISTED MAKER.(EG ADEQUACY OF BALLAST PUMPS, GENERATORS ETC)

ANALYSE BILL OF QUANTITIES FOR RETROFIT FOR EACH SHORTLISTED MAKER.

STEP 4 – ORDER EQUIPMENT & GET READY

MAKE AN OVERALL JUDGEMENT OF THE BEST EQUIPMENT CHOICE BASED ON A TECHNO-COMMERCIAL EVALUATION.

ORDER EQUIPMENT AND OBTAIN INSTALLATION DRAWINGS & OTHER INFORMATION.

ADJUST ENGINEERING FOR THE CHOSEN EQUIPMENT

OBTAIN CLASS APPROVAL SPECIFIC TO THE CHOSEN EQUIPMENT

MANUFACTURE PIPE SPOOLS, STEEL SEATS, DISTRIBUTION BOARDS PRIOR VESSEL ARRIVAL

PLAN ALL ACTIVITIES TO BE CARRIED OUT, TO ACHIEVE SHORTEST POSSIBLE INSTALLATION, ONCE SHIP ARRIVES INTO THE YARD.

EXAMPLES OF PLANNING ON TANKERS

EXAMPLE – CHOOSING THE LOCATION

AFRAMAX - PUMP ROOM BOTTOM PLATFORM FOR FILTER LOCATION

EXAMPLE – CHOOSING THE LOCATION

VLCC- PUMP ROOM TOP AS A LOCATION FOR BWTS EQUIPMENT

EXAMPLE – CHOOSING THE LOCATION

AFT PEAK BWTS EQUIPMENT – CHOOSING A LOCATION IN ENGINE ROOM IN THE VICINITY OF THE GS PUMPS

EXAMPLE- MODIFIED SCHEMATIC DRAWING

VLCC - BALLAST SCHEMATIC DRAWING WITH LIST OF PIPES & FITTINGS

EXAMPLE- 3D MODEL WITHOUT 3 D SCAN

VLCC – 3D MODEL FOR POSITION OF EQUIPMENT AND EXACT ROUTE OF PIPES & FITTINGS. (EXISTING EQUIPMENT ALSO MODELLED)

EXAMPLE – 3 D MODEL WITHIN A 3D SCAN

VLCC – BWTS EQUIPMENT POSITIONED WITHIN A 3D SCAN

EXAMPLE- LOCATING BWTS EQUIPMENT

IN A SEPARATE COMPARTMENT ADJACENT BALLAST PUMP TANK

TANKER WITHOUT PUMP ROOM

EXAMPLE – CHECK OF BALLAST PUMP CAPACITY

AFRAMAX – CHECK ADEQUACY OF BALLAST PUMP PRESSURE TO OVERCOME ADDITIONAL LOSSES DUE TO BWT EQUIPMENT

EXAMPLE – ENGINEERING A NEW PLATFORM

EXAMPLE: ISOMETRIC DRAWING FOR PIPE REFABRICATION

EXAMPLE– EFFECT ON GENERATOR CAPACITY

.

EXAMPLE– ELECTRICAL SINGLE LINE DIAGRAM

EXAMPLE – BILL OF QUANTITIES

SUMMARYBWT INSTALLATION AS A RETROFIT POSE VARIOUS CHALLENGES.

INSTALLATION IS TO BE MADE IN AVAILABLE SPACE, PREFERABLY USING EXISTING PUMPS AND GENERATORS.

EXAMPLES PROVIDED ARE BASED ON OUR EXPERIENCE ON 19 TANKERS.

THEY COVER VLCC’S, AFRAMAX, PRODUCT, GAS, BUNKER TANKERS WITH AND WITHOUT PUMP ROOM

PLANNING HELPS CARRY OUT RETROFIT IN MINIMUM COST & TIME.

ENSURES THAT CHARTER COMMITMENTS ARE ACHIEVED AFTER THE INSTALLATION.

THANK YOU