Acetylene bottles & oxygen bottles - Great  oxy acetylene cylinder prices…


Acetylene is a gas, also known as ethyne, with the formula C2H2.  Acetylene gas is a hydrocarbon fuel and a simple alkyne that is typically used as welding gas and as a chemical feedstock for polyethylene plastics and acrylics.

Acetylene is highly flammable and has a very broad range of flammability - from a lower flammable limit (LFL) of 2.5% to an upper flammable limit (UFL) of 81%. Acetylene is also the hottest burning fuel.

Acetylene is a colourless gas with a garlic odour.

Acetyline is a common incorrect spelling.

Dissolved Acetylene

Pure acetylene is intrinsically unstable so it is typically stored as dissolved acetylene in a solution of acetone. Dissolved acetylene is stored in special cylinders filled with a porous material that prevents the gaseous acetylene from collecting in voids.

Acetylene Properties

Acetylene Properties Chart
Acetylene Chemical Formula C2H2
Acetylene Systematic Name Ethyne
Oxy Acetylene Flame Temperature  3,330°C or 6,020°F
Acetylene Boiling point -84.7°C -120.46°F
Acetylene Melting point -80.75°C or -113.4°F
Acetylene Gaseous Density 1.11 kg/m3 (15°C @ 1 atm)
Acetylene Solid density 729 kg/m3
Acetylene Specific Gravity (gaseous) 0.91
Acetylene Auto-ignition temperature 300°C or 572°F
Acetylene Vapour pressure 4340.3 kPa (at 20°C)
Molar mass of Acetylene 26.04 g/mol

Oxy Acetylene Bottle Sizes - Oxy Acetylene Cylinder Sizes

Oxy acetylene bottle sizes include acetylene gas cylinder sizes in E and G cylinder. Oxygen gas is available in E2 and G2 oxy acetylene cylinder sizes (O2 cylinder sizes).

Acetylene Cylinder - Acetylene Bottles - Welding Gas

Acetylene Cylinder - Acetylene BottlesAcetylene is supplied in an acetylene cylinder.  Highly reactive, acetylene is dissolved in acetone and contained within a porous mass inside of a steel acetylene cylinder.  Acetone helps stabilize the acetylene gas by making it non-reactive.

A low auto-ignition temperature of acetylene means that minimal energy is required to ignite acetylene in air or oxygen.

The monolithic mass of porous materials can include things like firebrick, balsa wood, charcoal, or shredded asbestos.

More typical is a monolithic block consisting of calcium silicate hydrate.

It is also reactive with copper tubing and brass fittings, so they should not be used.

Stainless steel tubing is the preferred material.

Acetylene Common applications - Oxy Acetylene Fuel Cutting, Brazing, Heating & More

Oxy Acetylene fuel cutting, brazing, heating, flame hardening, flame cleaning and thermal spraying. Oxy Acetylene fuel cutting is used for cutting low carbon steel.

Flame hardening - an oxy acetylene flame can be used where the hardened surface of carbon steel components is either in-situ, as a remedial process, or on components too large to fit in a furnace

Flame cleaning - a broad oxy acetylene flame is held close to a steel surface for cleaning

Thermal spraying of various metals and ceramics. The material to be sprayed is fed through the flame.

Propane vs Acetylene

When comparing propane vs acetylene, propane cannot be used for gas welding. Propane can be used for brazing, but acetylene is better when it comes to thick flow brazing.

Both propane and acetylene can both be used for cutting but propane requires a different cutting technique.

Both propane and acetylene can be used for heating. However, propane will give off more total heat even though acetylene has a hotter flame. 

The oxy-propane flame temperature is 2800°C.  The oxy-acetylene flame temperature is 3100°C.

When both are used with oxygen, propane requires about 4x more oxygen than does acetylene. 

Oxygen Bottle: Compressed Oxygen Gas for Welding

oxygen bottle

Oxygen bottle has compressed oxygen gas, which is typically supplied with a purity of 99.5% or higher.

Oxygen gas is colourless and odourless.

Oxygen gas is a non flammable - oxidising agent.

It supports combustion and may cause fire/explosion in contact with incompatible substances, strong acids, reducing agents, combustibles and flammables.

Materials which burn in air, will burn more vigorously in oxygen enriched atmospheres.

Oxygen Gas - Common applications include:

Used with a fuel gas for cutting, welding, brazing and soldering.

The use of oxygen gives higher flame temperatures than if air is used.

In plasma and laser cutting steel, an arc or a laser beam is used to heat the steel to its ignition temperature.

Oxygen is then used in the same way as with oxygen cutting to create an exothermic reaction and to blow away any metal oxide or slag.

Thermal lancing oxygen is used in conjunction with the steel lance to create a high temperature melting process capable of drilling or cutting through materials such as concrete, brick, stone and most metals.

Used as an assist gas in lasers for cutting mild steel.

Oxy-Acetylene Cutting

Precautions for Safe Handling of Acetylene

  • Use of safe work practices are recommended to avoid acetylene inhalation.

  • Do not drag, drop, slide or roll acetylene cylinders.

  • The uncontrolled release of acetylene gas under pressure may cause physical harm.

  • Use a suitable hand truck for acetylene cylinder movement.

  • Never open an acetylene cylinder valve without the regulator attached.

  • Gas regulator of suitable pressure and flow rating fitted to acetylene cylinder and manifold with low pressure gas distribution equipment which controls fuel gas mixture and flame.

  • The acetylene regulator and other equipment must be compatible with the acetylene and suited for the particular use.

  • Never "sniff" acetylene as it may ignite spontaneously.

  • Carefully inspect the acetylene outlet and if there are any signs of dirt, blow it out with a jet of clean compressed air or nitrogen.

Precautions for Safe Handling of Oxygen Gas

  • Use of safe work practices are recommended to avoid inhalation.

  • Do not drag, drop, slide or roll cylinders.

  • The uncontrolled release of a gas under pressure may cause physical harm.

  • Use a suitable hand truck for cylinder movement.


Conditions for Safe Storage of Acetylene

(including any incompatibilities)

  • Do not store acetylene near incompatible substances and sources of ignition.

  • Acetylene cylinders should be stored: upright, prevented from falling, in a secure area; below 45°C, in a dry, well ventilated area constructed of non-combustible material with firm level floor (preferably concrete), away from areas of heavy traffic and emergency exits.

  • Post "No Smoking or Open Flames" signs in the acetylene storage areas.

  • Refer to applicable legislation on flammable storage quantity restrictions.

  • Never transfer acetylene to another cylinder or other container.

Acetylene Incompatible Materials

  • Acetylene is incompatible with oxidising agents (e.g. hypochlorites), copper, copper alloys (>70% copper), silver and mercury to form explosive acetylides.

  • Acetylene may decompose violently at high temperatures and/or pressures or in the presence of a catalyst.

  • Hazardous by-products may be produced when this acetylene gas/gas mixture is used in welding, cutting and associated processes.

  • Acetylene forms explosive acetylides with copper, silver and mercury.

  • Do not use alloys containing more than 65% copper with acetylene.

  • Please see Acetylene Safety Data Sheet for full safety details

Conditions for Safe Storage of Oxygen Gas

(including any incompatibilities)

  • Do not store near sources of ignition or incompatible materials.

  • Cylinders should be stored below 45°C in a secure area, upright and restrained to prevent cylinders from falling.

  • Cylinders should also be stored in a dry, well ventilated area constructed of non-combustible material with firm level floor (preferably concrete), away from areas of heavy traffic and emergency exits.

Incompatible Materials

  • Combustible materials such as oil and grease can spontaneously ignite at low temperatures in oxygen enriched atmospheres.

  • Metals can be ignited and will continue to burn in pure oxygen atmospheres under specific conditions of temperature and pressure.

  • Please see Oxygen Safety Data Sheet for full safety details


Who Discovered Acetylene?

The following is a brief timeline of the history of acetylene:

1836 – Acetylene (C2H2) discovered by English chemist Edmund Davy.  He discovered it accidentally whist experimenting with potassium.  He produced potassium carbide - K2C2 - which reacted with water to release acetylene.  He thought it would be used as an illuminating gas.

1860 - Acetylene was rediscovered by Marcellin Berthelot, French chemist.   He named it “acétylène".  He also discovered a number of different ways to produce acetylene. 

1950s – Acetylene manufactured by the partial combustion of methane (natural gas) or as a by-product in the ethylene stream from hydrocarbon cracking.


What is Acetylene Used For?

Here are some of the most notable uses for acetylene:

  • As an industrial gas for oxy acetylene gas welding and cutting

  • Used for lighting purposes before safer forms of lighting were available

  • As a chemical feedstock for polyethylene plastics and acrylics

How is Acetylene Produced and Stored?

  • Acetylene is manufactured by the partial combustion of methane (natural gas) or as a by-product in the ethylene stream from hydrocarbon cracking.

  • Pure acetylene can easily explode when in liquid form, solid form or while being pressurized.

  • To make it more stable, acetylene is supplied and stored dissolved in acetone or dimethylformamide (DMF).

  • This acetylene mixture is placed into a gas cylinder containing a porous filling of agamassan.

  • This packaging makes acetylene safe to transport and use, given proper handling.

Acetylene Facts

  • Acetylene is the simplest alkyne hydrocarbon

  • Acetylene is colourless and odourless (in pure form)

  • Acetylene can have a noticeable garlic-like smell if it contains impurities, such as hints of arsine and phosphine.

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