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Assuming that you are using the Oxygen-Acetylene cutting process; both, depending at what stage/phase of the cutting process you are in. What we encounter is a gas flow differential problem. With the cutting torch flame properly adjusted (the acetylene valve opened to the point where the un-mixed acetylene flame is burning without producing any smoke but still in contact with the cutting tip of the torch, the oxygen valve is slowly opened until you have adjusted the flame to a neutral quality or setting. Press the cutting oxygen lever; typically the flame will become slightly carburizing ("feathers" will appear at the ends of the pre-heat flames) this phenomonom occurs because of the drop in line pressure due to the high flow of oxygen through the cutting tube or orifice. With the oxygen lever remaining depressed, readjust the flame to a neutral setting. This will cause the flame to become slightly oxidizing when the cutting lever is released; since an oxidizing flame burns slightly hotter than a neutral flame the pre-heat of the metal that is being cut is faster. When the metal is at the proper pre-heat or kindling temperature (1600 F for pure iron - various steel alloys will be slightly different; beginning to turn bright red is a good indicator) depress the cutting oxygen lever, the flame will revert to "neutral" and the cut can then begin. Weld. Prof.
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Flame Outer oxidizing zone?
The outer oxidizing zone in a flame is where there is sufficient oxygen for combustion to occur. This area is characterized by a blue color and is where the most complete burning of fuel takes place. The outer oxidizing zone is important for efficient and clean combustion processes.
What is the oxygen to acetylene ratio in oxidising flame?
The ideal ratio of oxygen to acetylene in an oxidizing flame is around 1.1:1. This ratio helps ensure complete combustion of the acetylene, resulting in a clean and efficient flame with sufficient heat output for various welding and cutting applications.
What will happen to the liquid in the glass if a flame is lit the liquid will'?
Expand Slightly
What oxyacetylene flame has an excess of fuel?
An oxyacetylene flame with an excess of fuel is called a "carburizing" or "reducing" flame. In this flame, there is more acetylene than oxygen, resulting in a softer, more luminous flame that produces carbon soot. This type of flame is typically used for welding specific metals that require a protective atmosphere to prevent oxidation. It is characterized by a larger inner cone and a more pronounced outer envelope compared to an oxidizing flame.
Why oxidizing flame makes a roaring sound?
An oxidizing flame makes a roaring sound due to the rapid combustion of fuel and an excess of oxygen, which leads to a more vigorous reaction. This high-energy combustion creates turbulence in the flame, causing pressure fluctuations that produce sound waves. The noise is amplified by the larger volume of gases being expelled at high speeds, contributing to the characteristic roar. Additionally, the interaction of these gases with the surrounding air can further enhance the sound.
What types of flame are obtained in oxy-acetylene gas welding?
When the correct amount of Oxygen is mixed with the Acetylene a NEUTRAL flame is produced. Less than that amount produces a CARBURIZING flame. Too much Oxygen creates an OXIDIZING flame. Most welding/cutting is done with a NEUTRAL flame but all flame adjustments have their purpose.
What are the three types of acetylene welding flames?
Mixing Acetylene and Oxygen in the correct proportions produces an extremely hot flame. Using just enough Oxygen so that the Acetylene is almost completely consumed in the flame is called a Neutral Flame. In most welding and cutting applications you would utilize this flame. Reducing the amount of Oxygen produces a Carburizing Flame. It is yellowish and not as hot as a Neutral Flame, but, is used in certain situations. Welding Aluminum is one. Increasing the Oxygen produces an Oxidizing Flame. It produces a flame that is pointed, colder, and louder than a Neutral Flame. It wastes fuel and isn't as efficient as a Neutral Flame.
Which type of flame is used for high carbon steel?
Most cutting and welding is done with a neutral flame.
A cutting flame that has an excess of oxygen?
A cutting flame with excess oxygen is known as an oxidizing flame. It is commonly used in metal cutting processes, as the higher oxygen concentration facilitates faster and more efficient cutting by promoting the oxidation of the metal. However, care must be taken to prevent overheating or damaging the material being cut.
Which gas welding flame is the hottest?
It's called a Neutral flame. Enough Oxygen is added to the fuel to allow almost complete combustion. The remaing fuel is combined with the surrounding air and burned. This is the best flame for most cutting and welding operations. Too little Oxygen produces a Carburizing flame. It is yellow and produces smoke. A slightly Carburizing flame is used when welding Aluminum. Too much Oxygen produces an Oxidizing flame. It begins to sound louder and the inner flame comes to a point.
Flame Outer oxidizing zone?
The outer oxidizing zone in a flame is where there is sufficient oxygen for combustion to occur. This area is characterized by a blue color and is where the most complete burning of fuel takes place. The outer oxidizing zone is important for efficient and clean combustion processes.
What is the temperature of a neutral flame on a cutting torch?
5720 F ref. Victor Equipment Co. booklet OXY-FUEL Welding ,Cutting , and Heating Guide c.1996
What is the oxygen to acetylene ratio in oxidising flame?
The ideal ratio of oxygen to acetylene in an oxidizing flame is around 1.1:1. This ratio helps ensure complete combustion of the acetylene, resulting in a clean and efficient flame with sufficient heat output for various welding and cutting applications.
What is the use of oxidizing flame?
An oxidizing flame is used in metalworking to add oxygen to a flame, which increases the combustion of materials being worked on. This helps to remove impurities and produce cleaner and brighter metal surfaces. It is commonly used in processes such as welding, brazing, and soldering.
Which gases are used in gas welding?
In most applications Oxygen and Acetylene. Newer gasses have been developed that are cheaper than Acetylene but us old timers still prefer to use it. It produces a slightly higher temperature and can be used to blacken Aluminum. By doing this then heating with a neutral flame the black disappears when the correct preheat temp. is reached. At this point it is also at the correct tempering temp. Weld with a slightly Carburizing flame (less Oxygen than a neutral flame).
Why is oxidizing flame desirable in welding of copper alloys?
An oxidizing flame in welding of copper alloys helps to remove impurities such as oxides from the molten metal, resulting in a cleaner weld with better mechanical properties. Additionally, the oxidizing flame provides better control over the heat input, which is crucial for preventing overheating and distortion of the material.
What is the temperature of the oxidizing oxygen LP gas flame?
896 degrees fahrenheit to 1121 degrees fahrenheit
