We are a renowned Acetylene gas manufacturer, supplier and exporters in India. Acetylene sometimes also referred as D A Gas, is a hydrocarbon. It is basically colorless fuel gas and used extensively in industries for metal cutting and brazing applications. Acetylene produces highest known flame temperature when mixed with Oxygen. Commercially it is produced by reaction of Calcium Carbide with water. The Acetylene is highly unstable in nature and needs to be dissolved in a solvent called Acetone or DMF. Because of its highly unstable nature, Acetylene is always stored in Acetylene gas cylinders already saturated with required quantity of solvent. Acetylene cylinders are basically of 2 types, Seamless and Three Parts Welded. Acetylene is sometimes also referred as Dissolved Acetylene because it has to be stored in dissolved state in a solvent
Acetylene is one of the popular industrial gases used across the world. The gas offers several advantages which has contributed to its widespread use across various industries. Although human-friendly, the gas also possesses several hazardous properties, which may lead to accidents, if not properly addressed at the initial level. Thus, safety is of paramount importance in acetylene manufacturing plants.
Properties of Acetylene Gas
Acetylene is a non-toxic, colorless, and odorless gas. However, commercial grades contain impurities that lend a garlic-like odor to the gas.
Commercially manufactured through a reaction of water and calcium carbide, the moisture content of this industrial gas is less.
The ignition temperature of the gas is 325 °C, and it has a flammability range of 2.5 - 8.5 % of volume. (This is a range of concentration of vapor or a gas that will explode or burn when an ignition source is introduced).
The specific gravity of acetylene is 0.9 that makes it lighter than air (specific gravity of air is 1).
Acetylene gas is dissolved in dimethylformamide (DMF) or acetone, and supplied in special maroon-colored cylinders. These cylinders have left-handed connections.
Benefits of Acetylene (The most efficient fuel gas.)
- The low moisture content of the gas makes it perfect for various industrial processes that demand critical heating.
- It is one of the hottest fuel gases, which produce a flame temperature of about 3150°C when combined with oxygen.
- The oxy-acetylene combination is also used for cutting applications, because it provides the fastest piercing and preheating times than any other oxygen-fuel combination. Also, this combination ensures improved cutting quality, faster-cutting speed and cut initiation time. Along with these properties, this combination also helps reduce the use of oxygen.
- The gas also finds application in glass and materials processing industries, which often used it for carbon coating. This is because acetylene helps create a lubrication between the material surfaces.
- This gas is widely preferred for underground working also, as it is lighter than air.
- Acetylene gas is the only fuel gas that is used for welding various types of stainless steels.
- The oxygen-acetylene flame produces localized heat, which is widely utilized for heating applications such as these:
- Flame heating
- Flame hardening
- Flame gouging
- Flame cleaning
- Thermal spraying
- Flame straightening
- Profile cutting
- Wood ageing
- Branding wooden pallets
- Carbon coating
Know About the Hazards of Acetylene Gas
As discussed, acetylene gas offers several benefits, which makes it one of the most popular industrial gases. However, the following hazards of the gas also make it least safe and dangerous.
- The gas may explode, if it is compressed, liquefied, mixed with air or heated.
- Acetylene becomes unstable above the pressure of 25 psi, which makes it explosive, too.
- The method of acetylene production, its storage, charging, or use may be dangerous, if not handled properly. This is why cylinder production and charging plants are regulated by standards, rules, and codes.
Addressing the dangers of the gas, the National Fire Protection Association (NFPA) 51A requires acetylene charging facilities to use optical flame detection that detects fire faster than any other heat detectors or smoke detectors. The specified alarm levels of this system should be 25% LEL and 50% LEL. Also, it mandates the first alarm to be audible, visible, and activate the ventilation. The gas generation system should shut down at the highest alarm.