Table of Contents
- 1 What is the most unstable fuel gas?
- 2 What should you never use on oxy-fuel torch systems?
- 3 What substance is used to control the unstable properties of acetylene?
- 4 Which of the following are popular fuels used with oxygen for gas welding?
- 5 What is the primary use of oxy-fuel combustion?
- 6 What is the maximum pressure at which acetylene can explode?
What is the most unstable fuel gas?
Dissolved Gases Acetylene is the only common dissolved gas. Acetylene is chemically very unstable. Even at atmospheric pressure, acetylene gas can explode.
What makes acetylene unstable?
Acetylene by nature is an unstable gas that has limitations. Acetone is added to acetylene cylinders to help stabilize the gas. The reduction of acetone can cause the cylinder to become unstable and dangerous.
What is a fuel gas that can be used for oxy-fuel processes?
Propane is a single-component liquefied fuel gas used for oxy-fuel gas cutting, heating, brazing, and soldering. The main source of this gas is the crude-oil and gas mixtures obtained from active oil and natural gas wells. It is also produced in certain oil refining processes and in the recycling of natural gas.
What should you never use on oxy-fuel torch systems?
Acetylene Gas Store your acetylene cylinders in an upright position and avoid using acetylene above 15lbs of pressure – they contain a porous mass that has been saturated with liquid acetone. The acetylene gas is then pumped into the cylinder, which is in turn absorbed into the acetone and released upon use.
Which other fuel gas is used in oxy fuel gas welding process for metals with low melting points and thinner and smaller parts?
C, the mixture of oxygen and acetylene is used as it is the only gas combination with enough heat to weld steel. However, other gases such as propane, hydrogen and coal gas can be used for joining lower melting point non-ferrous metals, and for brazing and silver soldering.
Why Oxy-acetylene is used in welding purposes?
Acetylene produces a flame temperature of ~3100 degree Celsius along with oxygen. This high flame temperature makes acetylene a suitable choice for gas welding steel. 2. Welding: When burned in oxygen, acetylene produces a reducing zone, which easily cleans the metal surface.
What substance is used to control the unstable properties of acetylene?
Acetone in acetylene cylinders helps stabilize the gas making it non-reactive within the cylinder. In this process, acetylene is dissolved in liquid acetone under high pressure.
How do you store acetylene gas?
Acetylene cylinders must be always stored in the upright position with valve caps on. Take care to store small cylinders properly as they don’t have protection caps on them. Acetylene cylinders are not designed for use in environments where the temperatures may exceed 52ºC (125ºF).
Which other fuel gas is used in oxy fuel gas welding process for metals with low melting point and thinner and smaller parts?
Which of the following are popular fuels used with oxygen for gas welding?
The correct answer is Acetylene. Oxyacetylene welding commonly referred to as gas welding, is a process that relies on the combustion of oxygen and acetylene. When mixed in correct proportions within a hand-held torch or blowpipe, a relatively hot flame is produced with a temperature of about 3,200ºC.
Why is oxy fuel safety important?
Oxy-fuel processes such as heating, cutting, brazing and welding create a potential danger from flames, sparks and intense heat. Despite these hazards, millions of people work accident free. By design, manufacturers build safe equipment. This decreases the likelihood of a potential incident.
What is oxy-fuel welding used for?
Oxy-fuel welding is a process to weld types of metals, including carbon steel, alloy steels, cast iron, aluminum, and magnesium using pure oxygen and fuel/gas. In oxy-fuel welding, a torch is used to heat two pieces of metals in a temperature that produces a molten pool.
What is the primary use of oxy-fuel combustion?
Historically, the primary use of oxy-fuel combustion has been in welding and cutting of metals, especially steel, since oxy-fuel allows for higher flame temperatures than can be achieved with an air-fuel flame.
Which gas should be turned off first when using alternate fuels?
We recommend turning off the fuel gas first when using alternate fuel gases. If the oxygen is turned off first, alternate fuels in ambient air can generate very large flame fumes, when the oxygen is turned off first, that can rise up and burn the operator or equipment. This flame characteristic is generally not experienced when using acetylene.
What is the difference between oxygen-fuel combustion and unsourced combustion?
Unsourced material may be challenged and removed. Oxy-fuel combustion is the process of burning a fuel using pure oxygen instead of air as the primary oxidant. Since the nitrogen component of air is not heated, fuel consumption is reduced, and higher flame temperatures are possible.
What is the maximum pressure at which acetylene can explode?
However, it becomes unstable and spontaneously combustible when compressed to a pressure over 15 psi. Beyond 29.4 psi, it becomes self explosive, and a slight shock may cause it to explode even in the absence of air or oxygen. Click to see full answer Accordingly, what is the working pressure of acetylene?