- What produces the hottest flame?
- Which flame is harmful to steel?
- Is Green fire the hottest?
- Can black fire exist?
- What is a harsh flame?
- What is Flame and its types?
- What causes a carburizing flame?
- Why is Azula’s fire blue?
- When welding aluminum the flame should be?
- Is brazing as strong as welding?
- What is a fusion method in welding?
- What is the flame temperature of acetylene?
- What is the difference between a neutral flame and a carburizing flame?
- How do you reduce a flame?
- What color is the oxidizing flame?
- Is propane hot enough for brazing?
- Where does maximum flame temperature occur?
- What is an oxidizing flame used for?
- What flame is used for brazing?
What produces the hottest flame?
The hottest fires are from oxyacetylene torches (about 3000 degrees Centigrade) that combine oxygen and gas to create pinpoint blue flames.
The inner core of the candle flame is light blue, with a temperature of around 1800 K (1500 °C).
That is the hottest part of the flame..
Which flame is harmful to steel?
Oxidizing flameWhich of the following flame is harmful to steel? Explanation: Oxidizing flame is harmful to steel. An oxidizing flame should not be used for welding steel because the deposited metal will be porous, oxidized and brittle. This flame will ruin most metals and should be avoided.
Is Green fire the hottest?
A green flame is just as hot as any other kind of flame, except it has color added to it, due to the presence of a “contaminant”. The contaminant may be copper, barium, thallium, barium or Niobium, in order for the flame to show a green color.
Can black fire exist?
For real: If you shine a low-pressure sodium lamp on a yellow sodium flame, the flame will be black. Flames emits light and heat, so it seems impossible to make black fire. However, you actually can make black fire by controlling the wavelengths of absorbed and emitted light.
What is a 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 Flame and its types?
There are different methods of distributing the required components of combustion to a flame. In a diffusion flame, oxygen and fuel diffuse into each other; the flame occurs where they meet. In a premixed flame, the oxygen and fuel are premixed beforehand, which results in a different type of flame.
What causes a carburizing flame?
The carburizing flame is best used for welding high-carbon steels, for hard facing, and for welding such nonferrous alloys as aluminum, nickel, and Monel. The oxidizing flame burns at approximately 6,300 °F and is produced by burning an excess of oxygen.
Why is Azula’s fire blue?
Azula is the only firebender who can produce blue flames, which are hotter and contain more energy (according to Planck’s law) than those of other firebenders who bend normal orange flames. Her flames are blue due to her fire being fueled with pure hatred.
When welding aluminum the flame should be?
What kind of flame should be used when gas welding aluminum? A soft, neutral oxy-hydrogen flame. What is an acceptable acetylene line pressure to use when welding with an oxy-acetylene rig? About 5 psi.
Is brazing as strong as welding?
Welded joints are usually as strong or stronger than the base materials. Brazing differs from welding in that the temperature is considerably lower and does not melt the base metals. … But because brazing temperatures are lower, generally 1,150 to 1,600°F, most physical properties remain unaffected.
What is a fusion method in welding?
Fusion welding is a process that uses heat to join or fuse two or more materials by heating them to melting point. The process may or may not require the use a filler material.
What is the flame temperature of acetylene?
Air-acetylene produces a flame temperature of around 4000° F (2200° C). This is hot enough to solder aluminum work glass, repair radiators and braze plumbing fixtures. It is not hot enough to weld steel. When acetylene is burned in pure oxygen, the flame temperature may be as high as 5730° F (3166° C).
What is the difference between a neutral flame and a carburizing flame?
The reducing flame is the flame with low oxygen. … The reducing flame is also called the carburizing flame, since it tends to introduce carbon into the molten metal. The neutral flame is the flame in which the amount of oxygen is precisely enough for burning, and neither oxidation nor reduction occurs.
How do you reduce a flame?
Open the shutter on the barrel-shaped type by turning it counterclockwise; close it by turning it clockwise. Opening it will add more air, which will make the flame higher; closing it will reduce the air in the mix and lower the flame.
What color is the oxidizing flame?
blueAn oxidizing flame is any flame that has an excess of oxygen present. A hissing noise, sharp candles, and a paler blue color easily identify the flame. This flame is cooler than a neutral flame because there is an excess of oxygen flowing though the combusting gasses.
Is propane hot enough for brazing?
Here is the answer to whether you can braze with a propane / air torch. You can but you have to control the environment so that the heat loss to the atmosphere and parts is lower than the heat being put into the braze joint. Here is a standard handy torch.
Where does maximum flame temperature occur?
Explanation: Maximum flame temperature occur at inner cone. As flame moves from inner to outer temperature drop takes places.
What is an oxidizing flame used for?
A slightly oxidizing flame is used in torch brazing of steel and cast iron. A stronger oxidizing flame is used in the welding of brass or bronze. In most cases, the amount of excess oxygen used in this flame must be determined by observing the action of the flame on the molten metal.
What flame is used for brazing?
For most brazing jobs using oxygen-acetylene gases, a carburizing or neutral flame should be used. The neutral flame has a well-defined inner cone See diagram. Avoid an oxidizing flame. Excess acetylene removes surface oxides from the copper.