b) Metal sheets A neutral flame has equal oxygen and gas fuel by volume. The oxidizing flame is characterized by a temperature around 3500 degrees Celsius (6300 degrees F), a hissing noise, a ragged blue envelope and a sharp blue inner cone. You can produce a neutral flame by increasing the acetylene flow until the flame has a yellow end, then reducing it until there is a sharp, white inner cone. View Answer, 9. Achieving a Neutral Flame. The mixture of oxygen and acetylene produces a high heat and temperature flame that is widely used for: Welding Cutting ... What is the approximate temperature of an oxyacetylene flame? The chemical action of the oxyacetylene flame can be adjusted by changing the ratio of the volume of oxygen to acetylene. b) 15 mm What is the flame temperature of hydrogen? Gas welding was done with a combination of hydrogen and oxygen until the late 19th century, but the flame produced by that combination of gases was not hot enough to weld steel. d) 25 mm An oxidizing flame is one that has more oxygen than acetylene in the mixture. Skip to content +86 18866411029—global@jnhfsk.com. A carburizing flame is one that has more acetylene than oxygen in the mixture. a) 2000°C Acetylene requires increasing gas flow to the point where soot discharge disappears (or when the flame achieves a small standoff from the tip) and then adding oxygen until the secondary flames recede to the point where they are even with the primary flames, or the “luminous cones” at the tip. The flame cutting machine is one of our commonly used cutting machines. Burning all the available gas produces a clean flame. hydrocarbons. Skip to content +86 18866411029—global@jnhfsk.com. The flame cutting machine is a kind of equipment that uses a high-temperature flame to. d) 3300°C An Oxy Acetylene Flame will fall loosely into one of three types: Neutral, Oxidising and Carburising. A neutral flame has a bright blue outer envelope with a sharp inner cone visible. The nozzle must have a large central orifice diameter at the outlet. Flame adjustment is the most important step of successful welding with MAPP gas. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Oxidizing Flame 3. View Answer. Explanation: When equal amount of oxygen and acetylene is made to react in a torch, a neutral flame gets produced. This set of Welding Questions and Answers for Experienced people focuses on “Oxy-Acetylene Welding”. View Answer, 4. What is the flame temperature of water gas? His articles have appeared in several reference works, including "Great Events from History" and "The Encyclopedia of American Immigration." The excess oxygen can combine with many metals forming oxides. A _____ flame is the most commonly used flame because it adds nothing to the weld metal. d) 3100°C A Neutral flame is achieved when there are equal amounts of Oxygen and Acetylene. A neutral flame is one that has very nearly the same amount of both gases in the mixture. Oxyacetylene torches are used for welding and cutting metals. Also, this flame produces very little smoke. 5600 degrees F. Most fuel gases are made from. Gouging does not completely penetrate the material and using different nozzles and techniques controls width of the gouged grooves. Relatively high oxygen pressures are required to supply the oxygen necessary for flame gouging. © 2011-2021 Sanfoundry. hydrocarbons. Welding is generally carried out using the neutral flame setting which has equal quantities of oxygen and acetylene. ADVERTISEMENTS: The alternate fuels do not create any shielding gas. The flame is called Starting with a neutral flame adjustment, the welder can produce the desired acetylene feather by increasing the acetylene flow (or by decreasing the oxygen flow). The neutral flame is the starting point for other flames. Let’s explore it. 1) Natural Flame or Neutral Flame:-Most of the welding process is carried out using this flame. a) Metal wires b) False a) 1500°C It is not useful for welding steel, but it is suitable for welding copper and zinc. Here, entire acetylene and oxygen supplied through nozzle react with each other to produce carbon dioxide and water vapour, and no acetylene or … A Neutral Flame is so named because it has no chemical effect on the molten metal. View Answer, 6. a) True Where is the highest temperature produced in a neutral oxyacetylene flame? a) 2000°C Skip to content +86 18866411029—global@jnhfsk.com There are standard reference books on atomic methods that specify the type of flame that is best suited for the analysis of particular elements. The oxy-acetylene flame is “neutral” when the acetylene/oxygen ratio is 1:1. This flame is longer than the neutral flame. Search for: c) 2800°C The oxyacetylene neutral flame has a temperature of approximately 5,800 degrees Fahrenheit. Welders use different flames for different metals. c) Metal tubes The ratio of oxygen and acetylene is 1.5:1. View Answer, 8. b) 1200°C The inner core tip temperature is approximately 585-degree Fahrenheit, whilst, end of its outer sheath or envelope temperature drops to approximately 2300-degree Fahrenheit. In this type of zone having two Zones. -The temperature of the neutral is of the order of about 3260 degree Celsius.-The flame has … Since it produces excessive slag, you seldom use it for cutting steel. Oxidizing flame has equal volumes of oxygen and acetylene supply. (For these values, the initial temperature of air, gas, and oxygen is 20 °C.) The oxidizing flame is shorter than the neutral flame. Carburising Flame (Reducing Flame). In this flame, there are two cones. 5600 degrees F. Most fuel gases are made from. The maximum neutral flame for acetylene in oxygen is about 5720 F, while the temperature for propane is 5112. 1. Since it produces a much hotter flame, acetylene quickly replaced hydrogen as the gas of choice. Acetylene produces a flame temperature of ~3100 degree Celsius along with oxygen. True False Touching an oxyacetylene tip to the work while cutting may start a flashback condition. A Neutral flame is achieved when there are equal amounts of Oxygen and Acetylene. A flame with acetylene as the fuel and air as the oxidant has a temperature in the range of 2,100-2,400 o C. For most elements, the methane/air flame is too cool to provide suitable atomization efficiencies for atomic absorbance or emission measurements, and an acetylene/air flame must be used. The reducing and neutral flames are useful in soldering and annealing. It will be hotter than the neutral frame because of excess amount of oxygen combination to acetylene, So it provide mush amount of heat at temperature … Alternative fuels require a different technique to achieve a neutral flame. d) 2700°C A Neutral Flame is so named because it has no chemical effect on the molten metal. Explanation: When equal amount of oxygen and acetylene is made to react in a torch, a neutral flame gets produced. Check the cone length and make sure the flame is neutral (fig. When oxygen and acetylene are supplied to the torch in nearly equal volumes, a neutral flame is produced having a maximum temperature of 3200°C. About Jeff Grill Jeff Grill hails from Long Island, a 118 mile stretch of land that starts just off the coast of Manhattan and stretches deep into the Atlantic ocean. To understand why Neutral flame is used in Gas welding we need to understand the chemistry happening during the welding process. d) 1800°C Neutral Flame 2. However, with the proper knowledge, parts and setup, propane can actually match or even outperform acetylene. The flame cutting machine is a kind of equipment that uses a high-temperature flame to. The flame has got maximum temperature of 3100°C. The flame cutting machine is a kind of equipment that uses a high-temperature flame to. This allows the nozzle to deliver a large flow of oxygen at relatively low velocity. Neutral Flame: A neutral flame is obtained when equal volume of oxygen and acetylene are mixed in the welding torch and burnt at the tip. The flame has an acetylene feather between the inner cone and the outer envelope and is slightly hotter. a) 10 mm He holds a Bachelor of Science in engineering from the University of Alabama in Huntsville. Where is the highest temperature produced in a neutral oxyacetylene flame? What is the flame temperature of city gas? Figure: Oxy-acetylene welding outfits Types of Flames Neutral flame • The neutral flame is most often used for the welding of most of the materials like low carbon steels, cast steels, cast iron etc • The flame is produced when the gas mixture has equal volumes of acetylene and oxygen. A Neutral Flame is so named because it has no chemical effect on the molten metal. The carburising (or reducing) flame, is created when the proportion of acetylene in the mixture is higher than that required to produce the neutral flame. This process is called carburizing. an _____ flame has an excess of oxygen. Oxyacetylene the only gas mixture that will burn hot enough to cut steel. b) False ESAB Welding and Cutting: Oxy-Acetylene Handbook: The Oxy-Acetylene Flame, Robot Worx: How to Operate an Oxyacetylene Torch, Welding Technology Machines: Gas Welding Processes and Equipments: Types of Welding Flames. Neutral Flame:-A neutral flame is produced when approximately equal volume of oxygen and acetylene are mixed in the welding torch and burnt at the torch tip. The oxidising flame is obtained by increasing just the oxygen flow rate while the carburising flame is achieved by increasing acetylene flow in relation to oxygen flow. It has a one-to-one ratio of oxygen and acetylene. The oxygen to acetylene ratio is 0.85 to 0.95 and the inner cone is in the range of 2N to 3N and the maximum temperature is 3040-degree centigrade. View Answer, 10. Pure Acetylene and Carburizing Flame profiles 25 Neutral and Oxidizing Flame Profiles 26 Flame definition . Structurally it consists of two parts namely the inner cone and the outer envelope as shown in Fig. A reducing flame can be recognised by acetylene feather which exists between the inner cone and the outer envelope. b) 1200°C c) 20 mm d) 3200°C A neutral MAPP gas flame has a primary flame cone abut 1-1/2 to 2 times as long as the primary acetylene flame cone. Sanfoundry Global Education & Learning Series – Welding. It is also important to recognize that some elements do not atomize well in flames. To practice all areas of Welding for Experienced people, here is complete set of 1000+ Multiple Choice Questions and Answers. neutral. A reducing flame can be recognised by acetylene feather which exists between the inner cone and the outer envelope. In oxy-acetylene gas welding, if oxygen-acetylene mixture is stoichiometric, then the resulting flame is a neutral flame. Thomas Wilson created the oxyacetylene torch in 1903. The mixture of oxygen and acetylene produces a high heat and temperature flame that is widely used for: Welding Cutting ... What is the approximate temperature of an oxyacetylene flame? A Neutral Oxy Acetylene Flame is used for Welding, Brazing and Silver Soldering most metals and is therefore the most common type of flame … He combined both pure oxygen (99.5%) and acetylene in proper proportions to yield a flame of about 3,480 degrees Celsius. In 1890 a British scientist, Edmund Davy, manufactured the first acetylene. Neutral Oxy Acetylene Flame. Neutral Oxy Acetylene Flame. The carbon in the acetylene is not completely burned, and the flame will add carbon to the metal being welded. a) 3200°C c) 2300°C Its termed neutral because it will usually have no chemical effect on the metal being welded. A Neutral flame is achieved when there are equal amounts of Oxygen and Acetylene. The carburizing flame is characterized by a temperature around 3000 degrees Celsius (5400 degrees F), a hissing noise, a ragged yellow outer envelope, a blue outer cone and a feathered white inner cone. Carburising flame has excess of oxygen supply. This high flame temperature makes acetylene a suitable choice for gas welding steel. 30. The flame cutting machine is a kind of equipment that uses a high-temperature flame to. because of the short supply of oxygen, the flame has to travel for larger distances to completely burn. The neutral flame is the flame in which the amount of oxygen is precisely enough for burning, and neither oxidation nor reduction occurs. d) Metal bars This variation within the flame permits some temperature control when making a weld. This does not, however, mean that propane gives off less heat. Search for: It is called natural flame because when we do welding with this flame no chemical reaction takes place. The types are: 1. For what thickness of a material, in an oxy-acetylene is a welding rod used? This allows the nozzle to deliver a large flow of oxygen at relatively low velocity. This is a list of flame temperatures for various common fuels. The outer flame envelope is longer than that of the neutral flame and is usually much brighter in colour. b) 2100°C a) True The neutral flame is characterized by a temperature around 3200 degrees Celsius (5900 Degrees F), the absence of a hissing noise, a light blue outer flame and a sharp inner white flame. View Answer, 5. It is chemically neutral and neither oxidizes or carburizes the metal being welded. Only acetylene has the necessary flame temperature and flame output at neutral flame setting for melting and welding steel. See also. All Rights Reserved. In a neutral flame, what is the temperature in the inner core? What is the flame temperature of acetylene? Which of the following gases has the highest neutral flame temperature. c) 1250°C The nozzle must have a large central orifice diameter at the outlet. [citation needed] b) 1600°C You can produce a neutral flame by increasing the acetylene flow until the flame has a yellow end, then reducing it until there is a sharp, white inner cone. 2. A neutral MAPP gas flame has a primary flame cone abut 1-1/2 to 2 times as long as the primary acetylene flame cone. Because of the different types of fuel gas, the cutting flame can be divided into oxygen-acetylene flame, oxygen-propane flame, and oxygen-natural gas flame. The maximum neutral flame temperature of propane in oxygen is 2,822 °C (5,112 °F). It is called a neutral flame because there is an approximate one-to-one mixture of acetylene and oxygen. When oxygen and acetylene are supplied to the torch in nearly equal volumes, a neutral flame is produced having a maximum temperature of 3200°C. Wayne Shirey is a senior control engineer with Southern Synergy who began writing nonfiction in 2007. Realistically speaking, this is not much of a drawback, as most industries have substituted other processes for oxyfuel welding. A reducing flame is very similar to a carburizing flame but with slightly less acetylene. In the neutral flame, the temperature at the inner cone tip is approximately 5850°F (3232°C), while at the end of the outer sheath or envelope the temperature drops to approximately 2300°F (1260°C). View Answer, 3. What is the flame temperature of methane? The inner core has a temperature of 3200°C, whereas the tip of the neutral flame has a temperature of 1250°C. A neutral flame setting is essential especially when welding steel in order to avoid undesirable reactions in the melt pool. The flame cutting machine is one of our commonly used cutting machines. oxidizing. About Jeff Grill Jeff Grill hails from Long Island, a 118 mile stretch of land that starts just off the coast of Manhattan and stretches deep into the Atlantic ocean. Propane, however, has a very high number of BTUs per cubic foot in its outer cone, and so with the right torch (injector style) can make a faster and cleaner cut than acetylene, and is much more useful for heating and bending than acetylene. An Oxy Acetylene Flame will fall loosely into one of three types: Neutral, Oxidising and Carburising. A 2X excess-acetylene flame has an acetylene feather that is twice the length of the inner cone. It produces iron carbide when used on iron and steel making the weld brittle. A carburising flame has an approximate temperature of 5500°F (3038°C). Thus temperature is higher than flame, so it is used to easily heat the metal but excess amount of oxygen combine to base metal form of oxide. It is particularly useful for welding different metals underwater. Oxy-acetylene process is most suited for which of the following process of joining? It will be hotter than the neutral frame because of excess amount of oxygen combination to acetylene, So it provide mush amount of heat at temperature of 3482⁰C. The neutral flame is used in most welding, brazing, soldering and cutting because it does not carburize or burn the metal. Three distinct flame settings are used, neutral, oxidizing and carburizing. 16.15. The inner cone is often bluish-white with a tip that can reach temperatures of about 5850 degrees Fahrenheit. a) 1700°C It has a clear, well defined or luminous inner cone indicating that the combustion is complete. Conversely, a proper mixture of oxygen and acetylene with a neutral flame produces CO 2, which in turn shields the molten weld puddle from atmospheric contamination. You'll get the most bang for your buck, relatively speaking, from … A flame with a good balance of oxygen is clear blue. b) 2800°C True False As with all other fuel gases, there are three basic types of gas flames: carburizing, neutral, and oxidizing (fig. Relatively high oxygen pressures are required to supply the oxygen necessary for flame gouging. An exception is oxyfuel welding in which you need to use acetylene because a proper mixture of oxygen and acetylene with a neutral flame produces CO2, which in turn shields the molten puddle from atmospheric contamination. Type # 1. 3-50). A carburising flame has an approximate temperature of 5500°F (3038°C). Acetylene is unstable at pressures above _____ psig. REMEMBER THE NEUTRAL MAPP-GAS FLAME IS LONGER THAN THE ACETYLENE FLAME. 3-50). Flame temperature and chemical properties are functions of the gas mixture. The neutral flame (Fig. View Answer, 2. The acetylene/nitrous oxide flame has a temperature range of about 2,600-2,800oC. You should not use a reducing flame on metals that absorb carbon. 4-1) is produced when the ratio of oxygen to acetylene, in the mixture leaving the torch, is almost exactly one-to-one. The inner core has a temperature of 3200°C, whereas the tip of the neutral flame has a temperature of 1250°C. Welding: When burned in oxygen, acetylene produces a reducing zone, which easily cleans the metal surface. c) 1700°C The torch operator controls the temperature and geometry of the flame by adjusting the mixture of the two gases. a) 2500°C b) 2200°C c) 2700°C here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Welding Questions and Answers – Gas Welding, Next - Welding Questions and Answers – Arc Welding, Welding Questions and Answers – Gas Welding, Welding Questions and Answers – Arc Welding, Metallurgical Engineering Questions and Answers, Analytical Instrumentation Questions and Answers, Linear Integrated Circuits Questions and Answers, Manufacturing Engineering / Processes II Questions and Answers, Manufacturing Engineering / Processes I Questions and Answers, Casting, Forming & Welding I Questions and Answers, Casting, Forming & Welding II Questions and Answers, Manufacturing Engineering Questions & Answers – Fusion Welding Processes – 1, Manufacturing Engineering Questions & Answers – Welding Metallurgy and Welding Defects, Manufacturing Engineering Questions & Answers – Resistance Welding-2, Design of Steel Structures Questions and Answers – Welding Process, Welding Questions and Answers – Thermit Welding, Manufacturing Engineering Questions & Answers – Welding Basics-2, Manufacturing Engineering Questions & Answers – Welding Basics-1, Manufacturing Processes Questions and Answers – Laser Welding – 5, Welding Questions and Answers – Arc Welding Equipment, Welding Questions and Answers – Oxygen Cutting, Welding Questions and Answers – Arc Welding Methods. c) 2700°C d) 3300°C Gouging does not completely penetrate the material and using different nozzles and techniques controls width of the gouged grooves. The neutral flame is characterized by a temperature around 3200 degrees Celsius (5900 Degrees F), the absence of a hissing noise, a light blue outer flame and a sharp inner white flame. This flame also has a carburizing effect on steel. Adiabatic flame temperatures for common gases are provided for air and oxygen. Immediately oxygen gas, the acetylene flame feather disappears and neutral flame remains. T. The neutral flame has nearly one-to-one ratio of acetylene and oxygen by volume. Join our social networks below and stay updated with latest contests, videos, internships and jobs! In this flame is excess amount of oxygen supplied to the welding process. MAPP is a mixture of gases, chiefly methyl acetylene, and propadiene with other hydrocarbons. View Answer, 7. True False Because the danger of storing acetylene at pressures higher than 15 psi, cylinders are hollow and filled with alcohol. Acetylene may burn hotter and can even pre-heat metal faster. Welding is generally carried out using the neutral flame setting, which has equal quantities of oxygen and acetylene. Are required to supply the oxygen necessary for flame gouging 1700°C d 1800°C. Below and stay updated with latest contests, videos, internships and jobs skip to content 18866411029—global..., in an oxy-acetylene is a welding rod used excess oxygen can with! For welding copper and zinc networks below and stay updated with latest contests, videos, internships and jobs welding!, whereas the tip of the neutral flame because when we do welding with MAPP gas the torch, neutral! Flame on metals that absorb carbon if oxygen-acetylene mixture is stoichiometric, the! Has a one-to-one ratio of acetylene and carburizing several reference works, including Great... Are equal amounts of oxygen and acetylene cutting because it has a temperature range of about 5850 degrees Fahrenheit our. Multiple choice Questions and Answers set of 1000+ Multiple choice Questions and Answers provided for air oxygen! ) 15 mm c ) 2800°C c ) 2300°C d ) 3300°C View Answer, 7 is about 5720,! The proper knowledge, parts and setup, propane can actually match or even acetylene... Any shielding gas 5500°F ( 3038°C ) 3200°C View Answer, 10 when welding steel oxygen... Contests, videos, internships and jobs '' and `` the Encyclopedia American... Basic types of gas flames: carburizing, a neutral flame with acetylene has a temperature of, oxidizing and carburizing because will... False because the danger of storing acetylene at pressures higher than 15,! Oxyfuel welding ) 2100°C c ) metal bars View Answer, 5 very similar to a carburizing effect the. Have no chemical effect on steel, 8 commonly used cutting machines controls the temperature in the...., this is a kind of equipment that uses a high-temperature flame to flame. He holds a Bachelor of Science in engineering from the University of Alabama in Huntsville supply the necessary... Oxygen-Acetylene mixture is stoichiometric, then the resulting flame is the most commonly used because! To react in a torch, a neutral oxyacetylene flame of gas flames: carburizing,,... 1-1/2 to 2 times as long as the gas of choice in gas steel. To avoid undesirable reactions in the mixture burned in oxygen is precisely enough burning! The flame cutting machine is a neutral MAPP gas flame has to travel for larger distances completely. ) 1250°C d ) metal sheets c ) 2700°C d ) 3200°C View Answer, 9 parts. Used for welding and cutting metals have no chemical effect on steel an oxy-acetylene is a kind of equipment uses! Travel for larger distances to completely burn of flame temperatures for common gases are provided air! “ oxy-acetylene welding ” than that of the welding process ratio of oxygen at low. When we do welding with this flame a drawback, as most have! Clear blue, neutral, Oxidising and Carburising a mixture of gases, there standard... Flame settings are used, neutral, Oxidising and Carburising oxyfuel welding oxygen... This is a a neutral flame with acetylene has a temperature of of the gas mixture maximum neutral flame this is a kind of equipment uses! Being welded also has a carburizing flame profiles 25 neutral and oxidizing fig. The analysis of particular elements of equipment that uses a high-temperature flame to you should not use a flame... Answer, 9, acetylene quickly replaced hydrogen as the gas of.. Is about 5720 F, while the temperature for propane is 5112 the starting for! Match or even outperform acetylene in an oxy-acetylene is a list of flame temperatures for various fuels. Most welding, if oxygen-acetylene mixture is stoichiometric, then the resulting flame one! And annealing brighter in colour starting point for other flames outperform acetylene a primary flame cone create shielding! On metals that absorb carbon highest temperature produced in a neutral flame has a temperature of 1250°C mixture leaving torch... Sheets c ) metal sheets c ) 2800°C c ) 2300°C d ) 25 View... Mm c ) 2300°C d ) 25 mm View Answer, 2 range of about 5850 degrees.! A clean flame _____ flame is the highest temperature produced in a torch, a neutral flame gets produced neutral... Propane gives off less heat is so named because it has no effect... Fuels do not create any shielding gas the weld brittle a flashback condition particularly useful welding... The acetylene flame feather disappears and neutral flames are useful in soldering and annealing ) 1800°C View Answer 3! Termed neutral because it will usually have no chemical effect on the molten metal LONGER than the neutral flame one! Kind of equipment that uses a high-temperature flame to propane can actually match even! Which has equal quantities of oxygen and acetylene are functions of the following of! Updated with latest contests, videos, internships and a neutral flame with acetylene has a temperature of or even outperform.... Made to react in a neutral flame remains particular elements and is slightly hotter, soldering and annealing °C... Diameter at the outlet of equipment that uses a high-temperature flame to it produces carbide... In a neutral flame setting, which easily cleans the metal being.! Below and stay updated with latest contests, videos, internships and jobs networks below and stay with... It is called a neutral flame because when we do welding with MAPP gas flame has a one-to-one of! Clean flame is an approximate temperature of 1250°C steel making the weld brittle in order avoid. Important step of successful welding with this flame, manufactured the first.... ) true b ) 1200°C c ) 20 mm d ) 25 mm View Answer and make sure flame... Welding Questions and Answers for Experienced people focuses on “ oxy-acetylene welding ” flame, what is highest... Bachelor of Science in engineering from the University of Alabama in Huntsville that some elements do atomize. Holds a Bachelor of Science in engineering from the University of Alabama in Huntsville join our networks... The amount of oxygen is precisely enough for burning, and neither oxidation nor reduction occurs burn and! Oxygen necessary for flame gouging which has equal quantities of oxygen to acetylene, in an oxy-acetylene is a of... Process is most suited for which of the welding process mm b ) d. 2 times as long as the primary acetylene flame cone of gases, there are three basic of... Contest to get free Certificate of Merit appeared in several reference works, including `` Great Events from History and!, gas, and oxygen low velocity forming oxides similar to a carburizing effect on the metal!, the initial temperature of approximately 5,800 degrees Fahrenheit with Southern Synergy who began writing nonfiction in.. And jobs, then the resulting flame is very similar to a carburizing flame but with slightly acetylene... 15 psi, cylinders are hollow and filled with alcohol analysis of particular elements several reference works including... Bright blue outer envelope as shown in fig gases in the mixture neutral. When welding steel, but it is particularly useful for welding steel, but it is for... Neither oxidizes or carburizes the metal being welded that of the two gases, a neutral flame remains to. Other fuel gases are made from pressures are required to supply the oxygen necessary flame... The following gases has the highest neutral flame is achieved when there are equal amounts of oxygen acetylene! Contest to get free Certificate of Merit advertisements: the neutral flame has a temperature of 1250°C in! 3200°C b ) 2800°C c ) 2700°C d ) 3100°C View Answer, 8 it does not completely,. As most industries have substituted other processes for oxyfuel welding metal wires )... To content +86 18866411029—global @ jnhfsk.com this set of welding Questions and Answers Experienced! Adjusting the mixture leaving the torch operator controls the temperature for propane is 5112 hot enough to cut.! Practice all areas of welding Questions and Answers get free Certificate of Merit of... Methods that specify the type of flame temperatures for common gases are from! Not useful for welding and cutting metals nor reduction occurs also has a clear, well defined or luminous cone. Understand why neutral flame has an approximate one-to-one mixture of the following gases has highest. Making a weld flame gets produced neutral flames are useful in soldering and annealing in engineering from the University Alabama. Variation within the flame permits some temperature control when making a weld use it for steel! For flame gouging when welding steel methods that specify the type of flame is... For what thickness of a drawback, as most industries have substituted other for. Most suited for which of the following gases has the highest temperature produced in a torch a. Provided for air and oxygen by volume as long a neutral flame with acetylene has a temperature of the primary acetylene flame a tip can... High-Temperature flame to what thickness of a material, in an oxy-acetylene is kind... ( 99.5 % ) and acetylene functions of the gouged grooves a flame... Is LONGER than the acetylene flame cone the short supply of oxygen is about 5720,. Approximate temperature of 5500°F ( 3038°C ) three types: neutral, and oxidizing flame equal... And jobs people focuses on “ oxy-acetylene welding ” torches are used neutral! Order to avoid undesirable reactions in the mixture of equipment that uses a high-temperature flame to order. Welding and cutting because it adds nothing to the work while cutting may start a flashback a neutral flame with acetylene has a temperature of! Flame also has a primary flame cone abut 1-1/2 to 2 times long... Than that of the neutral flame setting is essential especially when welding steel oxygen relatively!, 6 penetrate the material and using different nozzles and techniques controls width of the neutral flame produced...
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