Shipyard Visit

INDUSTRIAL VISIT REPORT

TEBMA SHIPYARDS LTD

PLATE STORAGE associated with STEEL GRADE: Each steel grade has a number of explicit attributes associated the particular standard that it complies with, whereas a general term can cover more than one grade or standard. When steel is purchased to meet a particular standard, the purchaser is assured that it will meet certain chemistry and/or mechanical property requirements.

HEAT NUMBER:

An example of a heat number on a plate.

A heat number is an identification number that is stamped on a material plate after it is removed from the ladle and rolled at steel mill. Industry quality standards require materials to be tested at the manufacturer and the results of these tests be submitted through a report, also called a Mill Sheet or Mill Certificate. The only way to trace a steel plate back to its Mill Sheet is the Heat Number. A heat number is similar to a lot number , which is used to identify production runs of any other product for quality control purposes. NESTING PLAN: an optimized steel plate cutting plan saves shipyard cost on raw

material. An optimized steel plate cutting plan helps shipyard both time and material savings, increase production efficiency, in return enhance the company’s

competition capability.

HIGH TENSILE STEEL


High tensile steel may have ten times the tensile strength of wood, and more than twice that of mild steel, but it would be a mistake to overestimate the importance of this single quantity, as Fuller seems to do The toughness of metals is generally reduced by the process of increasing their tensile strengths, but the failure of a structure may be due largely to the stiffness, rather than the strength of the materials used. The larger the structure of buildings and ships, and so on, the lower the acceptable stress, for safety reasons. It follows that high strength metals are more safely used in small structures. This should perhaps be borne in mind when contemplating mega structures .

FABRICATION: CONVEYER: A conveyor belt (or belt conveyor) consists of two or more pulleys, with a continuous loop of material - the conveyor belt - that rotates about them. One or both of the pulleys are powered, moving the belt and the material on the belt forward. The powered pulley is called the drive pulley while the unpowered pulley is called the idler CNC CUTTING: The CNC Plasma Profile/Plate Cutting will complement the Ship-Block construction line of activity as a process of backward-integration and as a diversified business. Plasma works by sending a pressurized gas, such as nitrogen, argon, or oxygen, through a small channel. In the center of this channel, you'll find a negatively charged electrode. When you apply power to the negative electrode, and you touch the tip of the nozzle to the metal, the connection creates a circuit. A powerful spark is generated between the electrode and the metal. As the inert gas passes through the channel, the spark heats the gas until it reaches the fourth state of matter - plasma. This reaction creates a stream of directed plasma, approximately 30,000O F (16,649 C) and moving at 20,000 feet per second (6,096 m/sec) that reduces metal to molten slag. Plasma cutting is not as accurate as laser cutting but the advantage of the plasma cutting process is much faster cutting rates.


GAS BANK: Gas bank supplies the fuel and inert gasses to the cnc cutting machine. Through pipe lines . which is operated by means of control panel DEBONING AREA The cut plates are moved to the deboning area for stacking by means of magnetic lift cranes SHIP BUILDING PRESS A 375 tones ship building press is used for bending operations. Since rolling machines are not available in this yard , rolling activities are also done in this press LINES HEATING: The forming process consists of heating at a (steel) plate in a predetermined pattern of lines by means of a gas torch so that the plate assumes a Certain, curved shape. Thus, the method is an alternative or supplement to other forming methods such as pressing and rolling. Today, few skilful shipwrights are capable of performing the art of line heating, as the amount of heating and the position of the lines are entirely based on experience

TEBMA (Erection yard) SPACE UTILISATION The most important aspect in shipyard management is space management. In the available space we need to find the maximum available utilization. The concept of block erection must be fully utilized for this purpose. As the blocks are manufactured in another area the space on the yard is actually only utilized to erect the ships.


ERECTION JOINT The erection joint is the most important of all joints in a ship. As soon as the blocks are in place a piece of metal similar to a cover plate is affixed onto the two blocks to hold them in place. Then the blocks are welded together, usually in one stretch. Ceramic strips may be used to cover one side of the weld. The welding is done on the interior of the hull.

DOCK BLOCK WEDGE The dock block wedge is the special wedge that forms the extreme end of the dock block. These are usually of timber. These are wedge shaped so that they can easily be knocked off and removed. Another point to be noted is the difference between sand and pebble in the load carrying capacity. Sand transfers the load transversely and pebbles shift the load longitudinally. As a result pebbles provide good support but hard launching and sand vice versa.

GRID BLASTING This involves using a blast of fine particles at high pressure which in turn removes the rust and finishes off the surface. Steel grids are used to blast. The air is sucked in filtered and compressed. This compressed air is used to blast the surface. After blasting the debris are collected to reuse. Here S70 and S30 size grains are used to blast the surface at 10bar pressure. The surface preparation requirement isSA2.5

TRANSPORTER A schewerle SPMT( self propelled modular transporter ) is used to carry blocks and equipments to the erection yard , which is carried from manufacturing yard by means of a barge. A Power Pack Unit (PPU) supplies the hydrostatically driven SPMT with pressure oil for the drive, steering and lift operations. The electronic steering system is controlled by means of an on-board computer that can be configured to control an individual vehicle or groups of coupled units. A 6 axle transporter is used for the ease of flexibility


Bharathi shipyard Mangalore yard is one of the green field projects of Bharati Shipyard. It has already started its operations to a build shipyard in Thannerbavi village, close to the New Mangalore Port Trust (NMPT) on the banks of Gurupura river. This would be the first shipyard in Dakshina Kannada of Karnataka state to start building ships. The yard is located at Kudroli West, about 7.5 kilometers south of New Mangalore Port. The onshore shipyard facilities will be developed in an existing 28.3 acres of land belonging to the Mangalore Port in CRZ area wherein the most modern infrastructural facilities for ship building are being created. The layout has been effectively designed by Korean Experts & the yard has commenced production with a Platform Supply vessel of 2900 DWT for MAN Ferrostal AG Germany & in future it has been aimed at building of vessels up to 1,00,000 DWT within a span of 10 years.

FABRICATION: fabrication of blocks of maximum 10m length are made above skids. Skids are metal frame systems, acts as a platform for construction of blocks

Erection Ship hull blocks brought in the dry dock for the erection are a kind of completed structures, most of outfits, paintings and accuracy controls been progressed. But, in the dry dock, welding and other mechanical loads for the erection itself causes additional excessive deformations at each plate panels, which needs a lot of time and costs to correct them. Also it can make the ship owners discontented with the quality of entire ship. This is a primary factor to lower the productivity of dry dock and quality of ship hull blocks. So erection is to be given utmost care. In this

shipyard the erection process was upside down to facilitate easy joining and to reduce the loads during erection


CNC CUTTER: Plasma cutting is a process that is used to cut steel and other metals of different thicknesses (or sometimes other materials) using a plasma torch. In this process, an inert gas (in some units, compressed air) is blown at high speed out of a nozzle; at the same time an electrical arc is formed through that gas from the nozzle to the surface being cut, turning some of that gas to plasma. The plasma is sufficiently hot to melt the metal being cut and moves sufficiently fast to blow molten metal away from the cut. Some plasma cutter manufacturers build CNC cutting tables, and some have the cutter built in to the table. CNC tables allow a computer to control the torch head producing clean sharp cuts. Modern CNC plasma equipment is capable of multiaxis cutting of thick material, allowing opportunities for complex welding seams that are not possible otherwise

PIPING SECTION The flange to flange distance of a piping system are called spool . the pipes are manufactured with reference to the spool drawing. The material selection is depending on the service class. After the manufacturing the pipes are pickled .


PICKLING: Many hot working processes and other processes that occur at high temperatures leave a discoloring oxide layer or scale on the surface. In order to remove the scale the pipe is dipped into a vat of pickle liquor. Pickling process time in various chemicals is Alkaline-1 min Water – 10 min Acid-1 min Water(ph is maintained <5): 10 min Activation -10 min Phosphate-30min Passivation – 20-25 min


Chowgule Shipyard As pioneers in exploiting the inland waterways in Goa, the Shipbuilding Division

of Chowgule & Company Private Limited created waves in utilization of the rivers for the development of the economy. From as early as 1951, as builders, operators and repairers of large river fleets and with the experience and expertise to build a gamut of maritime vessels, ranging from ore-carrying barges, grab and suction dredgers and deep-sea fishing trawlers to tugs, pontoons, launches, hopper barges and coastal vessels, the yard has pioneered construction of all types of ocean going vessels up to 7000 DWT 

Total area- 42,000 sq meters

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Slipway, with total rail length 220m

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Two construction bays - 130m X 25m and 90m X 36m 2 X 60t goliath crane one in each bay with height of 23m

Covered fabrication shed - 120m X 22.5m Overhead cranes - 4 X 10ts, 1 X70 tons

Hatch cover fabrication shed - 82m X 25m Overhead cranes in shed - 2 X 25 tons Jib cranes - 8 X 1 ton

Jetty for outfitting Tower crane - 16 tons @ 17m & 3.1tons @ 55m


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Other facilities at the Shipyard: Cherry picker with telescopic booms - 3 nos. Platform scissor lift - 1 nos. Welding machines CO2 - 157 nos. Automatic CO2 machines (Noboruders) - 38 nos. Submerged arc welding machines - 4 nos. Inverters - 65 nos. Rectifiers - 48 nos. TIG - 6 nos. Gauging - 3 nos. Stud welding - 6 nos. o

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Mobile cranes - 3 tons to 100 tons Hydraulic positioning equipment for blocks of 600 ton maximum Motorised side transfer trolleys 50 Tons Transporter (for transporting blocks/sections within the Shipyard)

Container and bulk carrier These ships have specially designed cargo hatches that can be used for carrying bulk cargo as well as containers the important point to be noted is that the shape of the interior is not v shaped as in normal cargo ships since they need to hose box shaped containers also.

Interiors and accommodation The interiors are walled using soft materials and these are fixed using pins the important point here is that the pins are affixed to the wall using a special welding method similar to a nail gun that send off a spark to attach the pin. Even the smallest furniture is affixed onto the room so that they do not move around


during the ship motion. The stair are usually arranged along the length and not along the breath since the rolling motion is more predominant ship motion.


WSL (ABG Shipyard) Western India Shipyard Limited (WISL), India's largest composite ship & rig repair facility in the private sector, is one of the world's advanced multi-dimensional and multi-purpose yard offering modern, streamlined, sophisticated ship & rig repair facilities and industrial services. WISL's state-of-the-art Floating Dry Dock "westerner" has a capacity to repair ships upto 60,000 dwt and to accommodate ships upto 225m. length and 32.5m. in breadth. The yard has been designed and established in collaboration with world leaders in Ship Repairs. Functionally laid out and built around the gravity centre concept, the yard is 90% covered by lift and carry facilities by Portal/EOT/FDD & mobile cranes. WISL is strategically located at Mormugao Port Goa along the west coast of India at 15° 25' North and 73° 47' East and is geographically best positioned to offer a complete range of ship repair services. The shipyard has ISO 9001:2008 Quality Certification.The port is an international customs Port. Goa also has a domestic airport. The Classification societies such as IRS, LRS & ABS have offices at Goa. Shiprepairs consists of replacement of aging steel plate, pipes and valves, refurbishment of crew accommodation, repair/replacement/ renovation of deck side equipment, crane and tank covers, navigational equipment like propeller and rudder repairs, hull and tank repairs, surface coatings and rust prevention, air conditioning and communication systems, etc .


INFRA STRUCTURE WORK SHOP FACILITY: MACHINE SHOP 

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Overhead Cranes Horizontal Lathes 12m bed Vertical Turret Lathe Floor Boring & Milling Machine Table Boring & Milling Machine Dynamic Balancing Machine Hydraulic Press - 100t Grinding Machines White Metalling Facility Radial Drilling Machines Slotting Machines Power Saws Other Assorted Lathes

PLATE SHOP 

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Overhead Crane Plate Rolling Machine Guillotine Shear CNC Profile Gas Cutting Machine Hydraulic Press 400t MIG/MAG Welding Systems TIG Welding Systems Ship Profile Bending Press Universal Cutting Machine Universal Scissor Circular Saw Flanging Machine Thyristor Controlled Welding Rectifiers Semi-Automatic Submerged Arc Welding


PIPE SHOP 

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Overhead Cranes Pipe Bending Machines Cutting Machines Welding Machines TIG Welding Systems

ELECTRICAL WORKSHOP 

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Wire Winding Machine Motor overhauling Electrical Furnance Cabling Captive Power Plant-2x1 MVA Gensets Power Distribution Panels Electronic Repair Kits

HULL MAINTENANCE 

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LRS & IRS certified hull structure gauging Hydro & Grit blasting Facility with state-of-the-art equipment Airless Painting to manufacturers standards.

LIFTING EQUIPMENTS 

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Lifting Rail Crane - Max. boom-50 m-50t at 38 mt.- 1No.; -- Max boom-70 m-15t at 30 mt. - 1No. Mobile Crane-45t X 36 mt. - 1No. Fork Lift-1.5t- 1No.; -- 3.0t-2 Nos.; 5.0t-1 No.; EOT - 10/1t - 2 Nos.; -- 25/5t - 1 No Cherry Pickers-5Nos. with 18 mts. lift

SHIPWRIGHT SHOP 

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Floating Dry Dock Mooring Ropes Grit Blasting Machines Airless Spray Painting


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Staging Material 50 T x 5 T Railcranes 250 x 450 Bar HP Washing Machine

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PREFAB SHOP 

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10 T EOT 15 T Rail Crane Pipes (<25 mm),Bulbous Domes,Kort Nozzel, Plate Structures,Flanges,Welding Machine, Gas Cutting Machine Bevelling Machine

DRY DOCKING FACILITY 

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Floating Dry Dock has a capacity to repair ships up to 60,000 dwt and to accommodate ships up to 215m. length and 32.5m. in breadth. 2 Wet Berths (Vessels upto 200 mtrs.)

FACILITY FOR TANKER / OTHER SHIP CALIBRATION OF SAFETY ALARMS / TRIPS FOR MACHINERY, BOILER, BALLAST & CARGO TANKS – DNV APPROVAL. 

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replacement of defective sensors in most cases of repairs to electrodes . annual caliberation of gas detection instruments , supply instruments and calibration etc. iopp survey requirements – e/r 15 ppm monitor/ oily water seperator spares / oil discharge monitor control system- repairs and spares supply. boiler operation – problems / controls / repairs , spares and presenting for survey. manufacturer of electric panels – as per samples / drawings available. manufacturer of seals of westad make b/f v/v`s ( 50mm to 400 mm) fire detection system checks, repairs, and supply of sensors.


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repairs of defective pcbs on board for all equipments in e/r , p/r bridge, radio room etc. walkie-talkie repairs and supply. radio room equipment - spares supply. inert gas system repairs. machinery monitoring system. repairs. oil rigs related jobs – ballast handling systems, relief v/v , aero vhf , specified gauges etc repairing

NOTE- ALL CALIBERATION SERVICES PROVIDED ARE DNV APPROVED. STORAGE FACILITIES 

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Custom Bonded Areas/Store Main General Warehouse Ship Service Parks

MARITIME FLOATING AUXILLIARIES 

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Tug fleet provided by Mormugao Port Trust Fire Fighting tugs provided by Mormugao Port Trust Mooring service launches - 2 Nos. Pontoons 100 T Capacity - 2 Nos. Floating slop/sludge tanks - 10 Nos. Medical Facilities Permanent Attendance of Doctors Para Medical team and Ambulance

UTILITIES 

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Compressed Air -7 bar Oxygen - Acetylene network Fresh Water network Ballast Water system Fire Fighting network Captive Power - 2 MVA Electric Power Supply 220V - 380V - 415V - 440V at 50/60


INDUSTRIAL VISIT

DATE:18/03/2013

Shipyard Visit

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