PRESENTATION ON INTERN REPORT OF
welspun DI pipe
Presented by:-Deepak Maheshwari
200150119585
Subject:-Internship
8th sem of degree in mechanical
engineering
2022-2023
Under the guidance of muthumalikam sir
Index
1. Introduction
2. Induction furnace
3. Composition and temperature
4. GF converter
5. Centrifuge casting machine
6. Annealing
7. Zinc coating
Introduction
Welspun di pipe made ductile iron pipe has plant
divided in two zones
1. hot zone
2. Cold zone or finishing zone
Hot zones consist of an indication furnace, gf
converter, centrifuge casting machine, and last
Anneliese finance.
The cold zone consists of Zinc coating, chamfering,
hydraulic pressure testing, cement motor lining,
curing furnace and last bituminous coating.
Induction furnace
Electrical furnace in which the heat is applied by
induction heating of metal. Induction furnace
capacities range from less than one kilogram to one
hundred tons, and are used to melt iron and steel,
copper, aluminum, and precious metals.
The induction furnace, a coil carrying alternating
electric current surrounds the container or chamber
of metal. Eddy currents are induced in the metal
(charge), the circulation of these currents producing
extremely high temperatures for melting the metals
and for making alloys of exact composition.
Induction furnaces do not have a limit to the temperature
they can melt and/or heat. However, the refractories and
materials that contain the heated or melted material have
limitations. The highest temperature typically reached in
open air is about 3300°F for a platinum melt.
Composition and Temperature
Temperature needed at various stages
1. Blast furnace temperature= 1539C°
2. Input temperature of IF = 1340C°
3. Output temperature of IF = 1540C°
4. Mg treatment temperature = 1480C°
5. CCM 1st Hopper temperature= 1450C°
6. CCM 2sr Hopper temperature= 1300C°
Composition check at various stages
Blast furnace composition
Induction furnace composition Mg treatment
composition
1. Hopper composition
2. at Hopper composition
Gf converter
Here molten metal comes from an indication
furnace. The main purpose of gf convert is to add
the magnesium in molten metal and make it
ductile as well as hard.
Let's see that by following the picture As you can
see here magnesium add in molten metal
indirectly couse magnesium boiling paint is very
low around 650C°. Hance if we add directly then
it will vapour
centrifugal casting machine
The centrifugal casting method is the method to produce
pipes by pouring molten metal into a rapidly spinning
cylindrical mold in which centrifugal force from the
rotation exerts pressure on the molten metal.
Annealing
Annealing furnace The cast pipes are heat treated in an annealing
furnace to optimize the strength impulses and ductility of the pipes.
Welspun di pipe has a 65 meter long annealing furnace.
It has 26 aligners which are used to align the pipe in case they are
dislocated from their position
The Annealing furnace has 32 windows for monitoring the temperature
The annealing furnace divided in 4 zones.
Which are as follows.
1. Heating zone ( 800to 900 )
2. Holding zones ( 900 to 1000 )
3. Fast cooling ( 650 to 700 )
4. Slow cooling ( 500 to 600 )
Zinc Coatings
Zinc Coatings Form a Protective Barrier
Against MoistureIt occurs when iron or steel
comes in contact with moisture in the air.
Iron and steel are particularly susceptible
to oxidation.
Thank you
