What are the two types of flame cutting torches called?
There are two types of welding and cutting torches commonly used. They are the positive-pressure type (also known as an equal-pressure type or medium-pressure type torch), and the injector type.
Does oxygen or acetylene light first?
We recommend closing the oxygen valve first whenever turning off an oxy-fuel torch system especially when Acetylene is fuel. This is only part, but a very important part, of the complete safe operating procedure recommended for torches by Harris.
How hot is neutral flame?
In the neutral flame, the temperature at the inner cone tip is approximately 5850ºF (3232ºC), while at the end of the outer sheath or envelope the temperature drops to approximately 2300ºF (1260ºC).
What do different colored flames mean?
Hotter fires burn with more energy which are different colors than cooler fires. Although red usually means hot or danger, in fires it indicates cooler temperatures. While blue represents cooler colors to most, it is the opposite in fires, meaning they are the hottest flames.
How do you know if a flame is neutral?
The neutral flame is the flame in which the amount of oxygen is precisely enough for burning, and neither oxidation nor reduction occurs. A flame with a good balance of oxygen is clear blue. The reducing and neutral flames are useful in soldering and annealing.
What produces the hottest flame?
hydrogen
What is the difference between a harsh flame and a quiet flame?
What is the difference between a harsh flame and a quiet flame? A harsh flame is produced by using too much pressure of both gases to the tip, and it is noisy; a quiet flame has the correct amount of pressure and it does not make any noise.
Which part of flame is oxidizing?
An oxyfuel gas flame in which there is an excess of oxygen, resulting in an oxygen-rich zone extending around and beyond the cone.
What is the application of carburizing flame?
A carburizing flame is used in hardfacing and similar processes to obtain fusion between base metal and weld metal without deep melting of the base metal. See also Reducing Flame, Oxidizing Flame, Neutral Flame, and Oxyfuel Gas Welding.
What is the difference between oxidizing flame and carburizing flame?
Carburizing flame is obtained when less oxygen than that is required for stoichiometrically complete combustion is supplied. Oxidizing flame is obtained when excess oxygen than that is required for stoichiometrically complete combustion is supplied. Even after the entire fuel burns out, oxygen remains in excess.
Which flame is more luminous?
Due to availability of different levels of oxygen, luminous flame burns with a visibly bright yellow color whereas non-luminous flames burn with light blue color. More importantly, non-luminous flames do not produce soot, burn steadily and produce more heat or are much hotter when compared to non-luminous flames.
What are the characteristics of oxidizing flame?
An Oxidising Flame is where there is more Oxygen than Acetylene used. Key characteristics of an Oxidising Flame are a small, sharp, more pointed looking Cone Flame at the base of a shorter feather flame. An Oxidising Flame will have a distinct roar.
What are the characteristics of a flame?
Fire characteristics include flame height, fire intensity, season, frequency, flame angle, flame depth and scorch height.
- Flame height is measured vertically from ground level to the flame tip.
- Fire intensity is the rate at which energy (heat) is released as the fire burns.
- Season of year affects the impact of a burn.
What is harsh flame?
For most regulator settings, the gases are expelled from the torch tip at a relatively high velocity, and the flame is called “harsh.” For some work it is desirable to have a “soft” or low-velocity flame without a reduc- tion in thermal output.
What is the use of oxyacetylene flame?
The oxyacetylene flame is a gas torch that burns a mixture of acetylene and oxygen to produce a high-temperature flame (3,000°C or 5,400°F) that can be used for welding, cutting steel, and other metal working.
How thick of steel can you cut with oxy acetylene?
Likewise, how thick of steel can you cut with oxy acetylene? It can cut steel thickness from 1 mm to 1200 mm. And in most cases it used to cut steel plate thickness more than 20 mm, since oxy fuel cutting usually brings big tolerance.
What is the temperature of oxyacetylene flame?
about 3,200 deg
When a cutting flame has an excess of fuel the flame is called?
A carburizing flame is a flame burning with an excess amount of fuel; also called a reducing flame. Drag lines are the lines on the kerf that result form the travel of cutting oxygen stream into, through, and out of the metal.
Why is it not safe to use acetylene above 15 psig 100 kPag?
34. Why is it not safe to use acetylene above 15 psig (100 kPag)? Above the critical pressure an explosion may occur 35. Use Table 31-5 to determine the largest tip orifice size (drill number) that could be used with an acetylene cylinder containing 175 cu ft (4956 L).
Which oxygen fuel gas mixture produces the highest total heat?
Acetylene