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TOPIC:- AIR AND
GAS WELDING
PRESENTED BY :- 226120309114
What is Gas Welding and its
Working & Application?
Table of Contents
Gas Welding:
What is Gas Welding
Equipment used for gas welding
 Welding Torch
 Oxygen Cylinder
 Fuel Gas Cylinder
 Pressure regulator
 Today we will learn about gas welding and its principle, working, equipment’s,
types, application, advantages and disadvantages. Gas welding is a type of
liquid state welding process in which fuel gases burns to generate heat. This
heat is further used to melt interface surfaces of welding plates which are held
together to form a joint. In this process, mostly oxy-acetylene gas is used as
fuel gas. This process can be done with or without help of filler material. If the
filler material is used, it is fed directly into the weld area manually.Gas
welding is mostly used in every industrial processes which require welded
joints. The term welding is define to join two similar or dissimilar metals with the
application of heat. The heat provided in this welding is by burning of fuel
gases like hydrogen, LPG, Oxy acetylene etc.
What is Gas Welding?
 Gas welding is a most important type of welding process. It is done by burning of fuel
gases with the help of oxygen which forms a concentrated flame of high temperature.
This flame directly strikes the weld area and melts the weld surface and filler material. The
melted part of welding plates diffused in one another and create a weld joint after
cooling. This welding method can be used to join most of common metals used in daily
life.
Welding Torch:
 Welding torches are most important part of gas welding. Both the fuel gas and
oxygen at suitable pressure fed through hoses to the welding torch. There are
valves for each gas witch control the flow of gases inside the torch. Both gases
mixed there and form a flammable mixture. These gases ignite to burn at the
nozzle. The fire flame flow through nozzle and strikes at welding plates. The nozzle
thickness depends on the size of the welding plates and material to be welded
Oxygen Cylinder
 For proper burning of fuel, appropriate amount of oxygen required.
This oxygen supplied by a oxygen cylinder. A black line is used to
indicate oxygen cylinder
How Gas Welding Works?
 Gas welding process is quite simpler compare to arc welding. In this
process all the equipment are connected carefully. The gas cylinder
and oxygen cylinder
 connected to the welding torch through pressure regulators. Now
the regulate pressure of gas and oxygen supplied to the torch where
they properly mixed. The flame is ignited by a striker. Take care the
tip of torch is pointing downward. Now the flame is controlled
through valves situated in welding torch. The flame is set at natural
flame or carburizing flame or oxidizing flame according to the
welding condition. Now the welding torch moved along the line
where joint to be created. This will melt the interface part and join
them permanently.Application:

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krutarth patel.pdf

  • 1. TOPIC:- AIR AND GAS WELDING PRESENTED BY :- 226120309114
  • 2. What is Gas Welding and its Working & Application? Table of Contents Gas Welding: What is Gas Welding Equipment used for gas welding  Welding Torch  Oxygen Cylinder  Fuel Gas Cylinder  Pressure regulator
  • 3.  Today we will learn about gas welding and its principle, working, equipment’s, types, application, advantages and disadvantages. Gas welding is a type of liquid state welding process in which fuel gases burns to generate heat. This heat is further used to melt interface surfaces of welding plates which are held together to form a joint. In this process, mostly oxy-acetylene gas is used as fuel gas. This process can be done with or without help of filler material. If the filler material is used, it is fed directly into the weld area manually.Gas welding is mostly used in every industrial processes which require welded joints. The term welding is define to join two similar or dissimilar metals with the application of heat. The heat provided in this welding is by burning of fuel gases like hydrogen, LPG, Oxy acetylene etc.
  • 4. What is Gas Welding?  Gas welding is a most important type of welding process. It is done by burning of fuel gases with the help of oxygen which forms a concentrated flame of high temperature. This flame directly strikes the weld area and melts the weld surface and filler material. The melted part of welding plates diffused in one another and create a weld joint after cooling. This welding method can be used to join most of common metals used in daily life.
  • 5. Welding Torch:  Welding torches are most important part of gas welding. Both the fuel gas and oxygen at suitable pressure fed through hoses to the welding torch. There are valves for each gas witch control the flow of gases inside the torch. Both gases mixed there and form a flammable mixture. These gases ignite to burn at the nozzle. The fire flame flow through nozzle and strikes at welding plates. The nozzle thickness depends on the size of the welding plates and material to be welded
  • 6. Oxygen Cylinder  For proper burning of fuel, appropriate amount of oxygen required. This oxygen supplied by a oxygen cylinder. A black line is used to indicate oxygen cylinder
  • 7. How Gas Welding Works?  Gas welding process is quite simpler compare to arc welding. In this process all the equipment are connected carefully. The gas cylinder and oxygen cylinder
  • 8.  connected to the welding torch through pressure regulators. Now the regulate pressure of gas and oxygen supplied to the torch where they properly mixed. The flame is ignited by a striker. Take care the tip of torch is pointing downward. Now the flame is controlled through valves situated in welding torch. The flame is set at natural flame or carburizing flame or oxidizing flame according to the welding condition. Now the welding torch moved along the line where joint to be created. This will melt the interface part and join them permanently.Application: