Acetylene | Acetylene is the primary fuel for oxy-fuel welding and is the fuel of choice for repair work and general cutting and welding. Acetylene produces the hottest and most concentrated primary flame of all industrial fuel gases. Its calorific value is fairly low, but the portion emitted by the primary flame is very high, about 30%, making acetylene the fuel gas that produces the most heat in the primary flame.
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Acetylene is the primary fuel for oxy-fuel welding and is the fuel of choice for repair work and general cutting and welding. Acetylene produces the hottest and most concentrated primary flame of all industrial fuel gases. Its calorific value is fairly low, but the portion emitted by the primary flame is very high, about 30%, making acetylene the fuel gas that produces the most heat in the primary flame.
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Ethylene |
Ethylene is used primarily as a raw material in the organic chemical industry, but it is also used for cutting and similar processes. The calorific value of ethylene is approximately the same as that of acetylene, but a smaller portion of this heat is produced in the primary flame. Also mixtures of ethylene and acetylene are used. The most common composition is 80% ethylene and 20% acetylene. This mixture produces a higher flame temperature than ethylene owing to the addition of acetylene.
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Ethylene is used primarily as a raw material in the organic chemical industry, but it is also used for cutting and similar processes. The calorific value of ethylene is approximately the same as that of acetylene, but a smaller portion of this heat is produced in the primary flame. Also mixtures of ethylene and acetylene are used. The most common composition is 80% ethylene and 20% acetylene. This mixture produces a higher flame temperature than ethylene owing to the addition of acetylene.
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Hydrogen |
Hydrogen is a highly flammable gas and burns with an invisible flame. In the presence of air and oxygen, it is explosive within a wide mixing range. A mixture of two parts Hydrogen and one part Oxygen is commonly called Oxyhydrogen or explosive air. Hydrogen can also be used as a fuel gas for e.g. gas cutting. Its flame temperature and flame intensity are lower than those of acetylene and many other gases, but higher than those of propane and natural gas.
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Hydrogen is a highly flammable gas and burns with an invisible flame. In the presence of air and oxygen, it is explosive within a wide mixing range. A mixture of two parts Hydrogen and one part Oxygen is commonly called Oxyhydrogen or explosive air. Hydrogen can also be used as a fuel gas for e.g. gas cutting. Its flame temperature and flame intensity are lower than those of acetylene and many other gases, but higher than those of propane and natural gas.
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Natural gas (Methane) |
Natural gas consists primarily of methane. Its composition, and thereby its combustion properties, varies between different natural gas deposits. Natural gas is used mainly for heating purposes, but can also be used for e.g. cutting if it is already installed on the premises. The calorific value of methane is low, and a very small portion of it is produced in the primary flame.
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Natural gas consists primarily of methane. Its composition, and thereby its combustion properties, varies between different natural gas deposits. Natural gas is used mainly for heating purposes, but can also be used for e.g. cutting if it is already installed on the premises. The calorific value of methane is low, and a very small portion of it is produced in the primary flame.
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Propane |
Propane has a higher calorific value per kg of gas than acetylene, but generates a lower portion of this heat in the primary flame. The flame temperature is lower and the oxygen requirement is approximately 4 times higher than for acetylene.
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Propane has a higher calorific value per kg of gas than acetylene, but generates a lower portion of this heat in the primary flame. The flame temperature is lower and the oxygen requirement is approximately 4 times higher than for acetylene.
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Propylene |
The properties of propylene are similar to those of propane. The calorific value is roughly the same for the two gases, but propylene produces a larger portion of its heat in the primary flame, which means that propylene produces a hotter and more efficient flame than propane.
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The properties of propylene are similar to those of propane. The calorific value is roughly the same for the two gases, but propylene produces a larger portion of its heat in the primary flame, which means that propylene produces a hotter and more efficient flame than propane.
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