INDEX

1. Parts of ship

2. Ship building process

A. Hull shop

a. Design

b. Steel cutting

B. Pre-Fabrication

c. Block Assembly

d. Painting

C. Erection

e. Block Erection

f. Launching & Outfitting

3. Sea trial & Delivery

1. PARTS OF THE SHIP:

Anchor: A large hook attached to the ship which is cast overboard and

digs into the sea bed to keep the ship from moving.

Bow: The front portion of ship.

Stern: The back portion of ship.

Keel: The timber at the very bottom of the hull that runs from the bow to

the stern, often called the ship’s “backbone.”

Port: When facing the bow, the left side of the ship.

Starboard: When facing the bow, the right side of the ship.

Rudder: A blade attached under the stern used for steering.

Bulbous: Modifies the way water flow around the hull.

Bow Thruster: It is a transversal propulsion device built into, or

mounted to, the bow of ship.

Main deck: principal deck of the ship.

Hull: Body of the ship.

Rigging: all the ropes, cables, & shrouds on a ship.

SHIP BUILDING PROCESS

A.HULL SHOP:

a. DESIGN: Design is mainly three ways

1. Basic design

2. Hull design

3. Outfit design

Basic design:

A basis modeling which taking a carrying capacity and speed.

A performance assessment to a computer simulation.

Hull design:

The design are firm to the iron board of the at least to the maximum

and to develop fast speed. Many simulations about the body of ship structure and

computation need.

Design of the total hull or body of ship.

Outfitting design:

Machinery and tools of the boiler room conduit install task.

Install the cabin interior, the Electrical wire and pipe linings

inside the ship.

b. STEEL CUTTING:

The work that the steel place is automatically cut based upon

production design in information.

Steel cutting processed by different machines.

1. Plasma arc cutting machine: It is a CNC type machine

which usually cut the steel in different shapes after the

series of programme of instructions is fed directly into

computer without help of any man. In this process ,an inert

gas becomes heated up extremely and 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 cut.

SPECIFICATIONS:

Coolant - Kjellfrost

Plate width -3250mm

Thickness capacity-5mm to 40mm

Marking Pattern-powder marking

Mass-534kg

Efficiency-0.9

2.2000 Tons hydraulic press:

This machine is used to bending of the steel as per the design. This

machine is used for press the metal to any required shape.

SPECIFICATIONS:

Pressing Speed-6.7mm/s

Approach speed-75mm/s

Return speed-95mm/s

Length of stroke-224mm

Throat clearance diameter-320mm

B. Pre-Fabrication:

The cut plates and sections are initially welded together based on

drawing so as to convert them into pre fabricated units ( also called as

blocks) these blocks are then forward to erection department where

actual and complete welding of them takes place and structure of ship

starts to form.

c. Block Assembly:

The cut plates and sections are initially welded together based on

drawing.

d. Painting:

When all the cut plates are welded together as the blocks required. Then

these blocks are painted initially to free from the rust. The painting is

done twice after the surface preparation we call them as internal and

external painting. It is tested by high pressure steam cleaning.

C.ERECTION:

e. Block Erection:

The blocks which are joined with minute welding process are brought

together as per their code mentioned in the drawing. The blocks are

assembled according to design of the particular ship.

f. Launching and outfitting:

`There are three different methods of launching:

1. Slip way launching:

The ship launching slipway, a structure consisting of a

sloping way down to the water from the shipyard, is an

essential aspect of ship launching.

2. Float out launching:

The floating out type launching is carrying out ships which

are built in dry docks and are launched by filling the dock

by water. This floating type launching system is simple,

effective and safe procedure

3. Lift on launching:

The assembled ship is lifted by using a crane support from

the dry dock. This method is used for smaller size ships

cannot used for large, high tonnage ships.

OUTFITTING:

Each mechanic part assembles & pipe laying & electronic equipment

installing. Outfitting is started only after launching from the hull (dry

dock).Even before the hull block is made, the outfit components

(machinery, piping, seating…,etc..,) which are supposed to be located in

particular small area in the ship are full assembled a small unit and

when the hull block is made, this unit is then directly installed at the

required position of the block. This process actually helps in reducing

the cycle time required to build the ship.

3. SEA TRAIL AND DELIVERY:

Sea trail is the testing phase of a water craft (including boats, ships and

submarines).It also referred to as a “Shakedown cruise” by many naval

personnel. It is usually the last phase of construction and takes place on

open water, it can be last from a few hours to many days. Sea trails are

conducted to measure the performance of the ships like ship speed,

equipment, safety features. Successful sea trails subsequently leads to a

vessel’s certification for commissioning and acceptance by its owner.

CONCLUSIONS:

The total ship manufacturing process is observed while visiting

Hindustan shipyard limited, vizag and the conclusions are

Visited hull manufacturing shop, pre-fabrication department and

erection department.

Identified the plasma arc cutting, CNC flame cutting during hull

manufacturing

Identified the assembly of steel plates into blocks during pre-

fabrication.

Identified the launching of ship from dry dock.

REFERENCES:

Visiting Hindustan shipyard limited

Hull shop department procedure and regulations.

Pre-fabrication department procedure and regulations.

Erection department procedure and regulations.

Important source from the internet.