What is the maximum pressure for acetylene gas?
Under no condition shall acetylene be generated, piped (except in approved cylinder manifolds) or utilized at a pressure in excess of 15 psig (103 kPa gauge pressure) or 30 psia (206 kPa absolute). ... This requirement is not intended to apply to storage of acetylene dissolved in a suitable solvent in
What are the safety precautions when using acetylene?
- Acetylene can form explosive when mixed with air. - No smoking or naked flames within the specified area. - Store away from oxidizing sources in a well ventilated area. - Close cylinder valve when not in use. - Never use Acetylene in direct contact with unalloyed copper, silver and mercury.
What is the maximum hourly draw off rate from an acetylene cylinder?
- The maximum hourly draw-off rate from an acetylene cylinder should be limited as follows: Cylinders : 1/7 of nominal contents (i.e. for a “G” cylinder content is 7.0 m3 so max. draw-off is 1.0 m3 per hour or 16.7 L/min.
What are the conditions for the storage of acetylene cylinders?
Some cylinders must be stored under very strict conditions - acetylene cylinders, for instance, contain a fusible pressure release plug that may leak acetylene, and an acetylene-air mixture is highly explosive. Check the regs. What is the maximum number of feet that a safety net can be placed directly below the working surface?
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What is the correct working pressure for acetylene?
The maximum working pressure for acetylene gas when using a cutting torch is 15 psi or 103.4 kPa. If the pressure goes beyond that, it gets unstable and becomes dangerous. It is a flammable gas. When it becomes unstable, it is at risk of spontaneously combusting.
What is the maximum psi before acetylene becomes unstable?
15 psiAcetylene will not explode under low pressure at normal temperatures. 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.
At what pressure should acetylene cylinders be withdrawn from service?
Acetylene under pressure can explode. Never use acetylene outside of the cylinder at pressures over 103 kPa (15 psig) unless you take special precautions.
Why should you not use acetylene over 15 psi?
Acetylene is highly flammable under pressure and is spontaneously combustible in air at pressures above 15 psig. Acetylene cylinders do not contain oxygen and may cause asphyxiation if released in a confined area.
What is oxyacetylene welding?
Oxy Acetylene welding is a welding process manually, in which the surfaces to be joined, which is warming to melt by a gas flame Oxyacetylene with or without filler metal, where the connection process without emphasis. In addition to the purposes of welding (connecting), gas welding can also be used as preheating, brazing, cutting, and hard facing.
What gas is used in the process of burning?
Besides acetylene gas is also used hydrogen gas, natural gas, propane, for metals with a low melting point. In the process of burning the gases needed oxygen. Oxygen is obtained from the air where the air itself contains oxygen (21%), also contain nitrogen (78%), argon (0.9%), neon, hydrogen, carbon dioxide, and other elements that form a gas.
What is the condition of welding to produce good quality?
To produce good quality, welding conditions should be running properly and the techniques and materials used must meet the standards. As is the case in other welding processes, welding defects can occur. Oxyacetylene welding disability as follows: Penetration is less than perfect.
Is oxyacetylene a gas?
Therefore, Oxyacetylene often called hydrocarbon gas consisting of carbon, lime, and water. Oxyacetylene nature is odorless and colorless. Keep in mind that pure Oxyacetylene is very susceptible to an explosion caused by pressure and temperature factors. For this reason, the Oxy-acetylene generator is limited to a maximum pressure of 5 atm.
Can you use welding gas on steel?
Nevertheless, almost all types of ferrous and non-ferrous metals can be welded with welding gas, either with or without additives. Besides acetylene gas is also used hydrogen gas, natural gas, propane, ...
Is oxyacetylene welding perfect?
Oxyacetylene welding disability as follows: Penetration is less than perfect. It can happen because the penetration is not performed on the entire thickness of the base metal, weld bead two are not mutually perform inter-penetrating and penetrating into the end of the fillet weld. Fusion is less than perfect.
When should acetylene cylinders be returned to the distributor?
Acetylene cylinders should be returned to the compressed gas distributor when emptied or no longer used.
What happens when you open an acetylene cylinder?
When the valve of a charged acetylene cylinder is opened, the acetylene comes out of solution and passes out in the gaseous form. IT IS CRUCIAL THAT FUSE PLUGS IN THE TOPS AND BOTTOMS OF ALL ACETYLENE CYLINDERS BE THOROUGHLY INSPECTED WHENEVER HANDLED TO DETECT SOLVENT LOSS. There should be no sources of ignition in the storage or use area. If rough handling or other occurrences should cause any fusible plug to leak, move the cylinder to an open space well away from any possible source and place a sign on the cylinder warning of "Leaking Flammable Gas". Contact Baylor Police Department at ext 2222 on campus or 254-710-2222 from a cell phone.
How long should you keep acetylene cylinders?
The rule of thumb is not to use the cylinder for as many minutes as the cylinder was on its side, up to 24 hours.
How to treat acetylene eye irritation?
Wash affected area (s) with soap and warm water. If irritation develops, seek medical attention. Eye Contact: Not a likely route of exposure since acetylene is a gas at room temperature. Contact of liquid acetylene with the eyes may cause temporary irritation. Flush with water for at least 15 minutes.
Does acetylene explode?
Since acetylene is shock-sensitive and explodes above 30 psi, cylinders of acetylene contain acetylene dissolved in acetone. Acetylene cylinders must not be placed on their sides, since the acetone and binders will have dislodged.
Is acetylene a combustible substance?
Acetylene is highly flammable under pressure and is spontaneously combustible in air at pressures above 15 psig. Acetylene cylinders do not contain oxygen and may cause asphyxiation if released in a confined area. Since acetylene is shock-sensitive and explodes above 30 psi, cylinders of acetylene contain acetylene dissolved in acetone. Acetylene cylinders must not be placed on their sides, since the acetone and binders will have dislodged. The result may be formation of an acetylene "pocket" that is subject to polymerization and the possibility that liquid acetone will be released into the regulator.
What is the pressure of acetylene?
Acetylene is normally dissolved in a solvent, typically acetone, at pressures up to 19 barg (275 psig) at 20°C (6 8°F). The
What is the key to preventing acety-acid?
port are the key to preventing acety-
Which hydrocarbon has the highest flame temperature?
Acetylene has the highest flame temperature of any common hydrocarbon
Can acetylene be explosive?
However, free acetylene can undergo explosive decomposition when compressed or overheated. Decomposition is a
Is acetylene a gas?
Pure acetylene is a unique gas with hazards that arise from its high energy bonds and flammability. These same prop-
Is acetylene harmful to humans?
Studies have shown there to be no harmful effects from exposure to acetylene.
Can a rupture be fitted with a pressure?
rupture, even if fitted with a pressure
What is the minimum pressure needed to draw acetone?
Recommended cylinder minimum is 25psi to be sure not to draw any of the acetone from the cylinder.
Do you leave residual pressure in a cylinder?
With any cylinder you should leave a tiny bit of residual pressure in the tank when you return it. If you allow the tank
What is the normal pressure of acetylene?
At normal temperature, cylinder pressure ranges from 250 psig to 300 psig.Carbon- free acetylene has the same sizes with Industrial acetylene but the latter should never be refilled with Industrial and vice versa.
How much solvent is in an acetylene cylinder?
Acetylene cylinders are filled with solvent (acetone) based on cylinder specification but, normally for brand-new standard acetylene cylinder it is filled with 14 kg of solvent.
How many acetylene cylinders are in a second charge?
All acetylene cylinders undergo second charging. This means more acetylene content per cylinder. At normal usage, SUGECO acetylene has an oxygen to acetylene ratio of 2 is to 1 which means only one acetylene cylinder will consume for every 2 standard oxygen cylinders.
What material is used to make Acetylene?
Air Less than 1% over the cylinder contents Less than 1% over the cylinder contents. MATERIAL COMPATIBILITY. Steel, stainless steel, aluminum and wrought iron are recommended for use with Acetylene. Joints may be welded or threaded or flanged. The use of cast iron fittings is not permissible.
What is required for oxy-fuel welding and brazing?
A shielding of carbon dioxide (CO2) is required for oxy-fuel welding and brazing. Oxy- acetylene combustion produces CO2 of sufficient amounts in its secondary (also known as second) stage of combustion
What temperature does air have to be to be a liquid?
air is purified, compressed and cooled to a liquid at a temperature of -194°C (-317°F), mixture of approximately one-fifth oxygen and four-fifths nitrogen, the temperature is then raised to -182°C (-295°F) to convert the nitrogen to a gaseous form
Which thread on fuel gas fittings?
Fuel gas fittings have a left-hand thread.
