Oxy-fuel cutting is a thermal cutting process that uses oxygen and fuel gas (such as acetylene, propane, MAPP, propylene and natural gas) to cut through materials.

Which gas is used in gas cutting?

In gas cutting a flame of fuel gas such as acetylene burning in oxygen heats the area to be cut; a stream of oxygen is then injected around the flame which actually burns the steel and ejects the oxide as dross.

How many types of gas cuts are there?

There are five main types of gas that are regularly used to perform gas cutting processes – natural gas, MAPP, acetylene, propylene and propane.

What is flame cutting process?

Flame cutting is oxygen cutting in which the appropriate part of the material to be cut is raised to ignition temperature by an oxy-fuel gas flame (definition from BS 499:Part 1:1991 Section 7 No. 72 002). Also known as oxy-fuel cutting, the process is used for separating and shaping steel components.

Why oxygen is used in gas cutting?

Basically, a mixture of oxygen and the fuel gas is used to preheat the metal to its ‘ignition’ temperature which, for steel, is 700°C – 900°C (bright red heat) but well below its melting point. The oxygen jet blows away the slag enabling the jet to pierce through the material and continue to cut through the material.

Can LPG be used for gas cutting?

LPG is also used in cutting of most carbon steel because it cuts through across layers and jumps air gaps with ease, leaving no slag on the steel. It can tolerate a greater nozzle to workpiece distance which reduces the risk of molten metal splashing back onto the nozzle and causing a “backfire”.

What is gas welding process?

Gas welding is the process in which a gas flame is used to raise the temperature of the metals to be joined. • The metals are heated up to melting. The metal flows and on cooling it solidifies.

What is the difference between gas welding and gas cutting?

Cutting with the oxy-fuel process is just the opposite from of welding. Oxy-fuel cutting uses acetylene and oxygen to preheat metal to red hot and then uses pure oxygen to burn away the preheated metal. Because this is achieved by oxidation, it is only effective on metals that are easily oxidized at this temperature.

What is drag line in gas cutting?

“Drag lines” on the surface of the cut face are inherent to flame cutting, and under ideal cutting conditions it is these drag lines which determine surface roughness. Dimensional control of flame cut sheet and plate is largely dependent on accuracy of profiling equipment and the thermal expansion of the material.

Why SS is not cut by gas cutting?

Metals such as aluminum and stainless steel cannot be cut with Oxy/fuel due to the formation of an oxide that prevents oxidation from fully occurring.

What are the types of gas welding?

Following are the 5 different types of gas welding:
Oxy-acetylene gas welding.Oxy-gasoline gas welding.MAPP gas welding.Butane or propane welding.Hydrogen gas welding.

What are the 3 types of flames?

There are three types of flames natural flame, carburizing flame and oxidizing flame.

How thick can a cutting torch cut?

Oxy-acetylene torches can easily cut through ferrous materials in excess of 200 mm (8 inches). Oxygen lances are used in scrapping operations and cut sections thicker than 200 mm (8 inches).

What is plasma cutting machine?

Plasma cutting (plasma arc cutting) is a melting process in which a jet of ionised gas at temperatures above 20,000°C is used to melt and expel material from the cut. During the process, an electric arc is struck between an electrode (cathode) and the workpiece (anode).

What is MIG welding process?

Metal Inert Gas (MIG) welding is an arc welding process that uses a continuous solid wire electrode heated and fed into the weld pool from a welding gun. The gun feeds a shielding gas alongside the electrode helping protect the weld pool from airborne contaminants.

Why acetylene is used as welding gas?

Acetylene produces a flame temperature of ~3100 degree Celsius along with oxygen. This high flame temperature makes acetylene a suitable choice for gas welding steel. 2. Welding: When burned in oxygen, acetylene produces a reducing zone, which easily cleans the metal surface.