At approximately 14.50hrs on Thursday 7th January 2010, an acetylene cylinder exploded whilst an employee was working on the filling racks at a dissolved acetylene (DA) bottling plant. The force of the blast caused damage to buildings and nearby equipments. The failure caused severe fragmentation of the cylinder and resulted in a fatality and property damage. Acetylene can explode with extreme violence if the pressure of the gas exceeds about 100 kPa (≈14.5 psi) as a gas or when in liquid or solid form, so it is shipped and stored dissolved in acetone or dimethylformamide (DMF), contained in a metal cylinder with porous filling (Agamassan), which renders it safe to transport and use. 1, Bill Geary. The article describes a recent scene where the area around a farm had to be evacuated because it was discovered that there was an acetylene cylinder in a burning barn on the property. Acetylene cylinders should be used in the upright position to avoid withdrawing acetone during use. A total of 13 bonfire tests were performed, as to provide data for the model validation. The cylinder is maroon-coloured; Oxygen (commercial) is contained in a black coloured cylinder. The actual cause of this incident could not be established. The acetylene valve on the quad was slowly opened; the welder then opened up the oxygen and acetylene valves on the cutting head and ignited the tip. 2.2). This video is of a scientific nature its purpose is to show and encourage to obey safety when handling gas cylinders. This risk is magnified over prolonged storage periods. A subcontractor was preparing to use an oxy-acetylene torch on the back deck of a vessel. The acetylene cylinder valve should only be opened with a specific wrench and should be kept in place whenever the cylinder is in use. Over the weekend the acetylene accumulated inside the truck. d�!��$ � Acetylene is an inflammable gas commonly used for welding in small-scale industries. If a cylinder is involved in fire, the risk of explosion can last for up to 24 hours after the fire has been extinguished. Read more like this – subscribe today ��l6���v� Νs�}�� �G�, ����S=,iϖVڞ��&�mV������b�9�������B*�6� 4. pp. Phil Hooker. The fire service will impose a cordon while the cylinder is cooled. Acetylene cylinders are a separate, dedicated and special type of cylinder that is used to store and transport the gas above pressures of 5 psi (.3 bar). The force of the blast caused damage to buildings and nearby equipments. Many acetylene cylinders are collected and transported in unventilated vehicles. Two of the acetylene cylinders exploded and ruptured. A protective metal cap screws onto the valve to prevent damage during shipment or storage. Acetylene cylinders must never be transported or stored in a closed vehicle. The effectiveness of water cooling as a measure to prevent the burst of the cylinder is analyzed. A too fast withdrawal may carry over solvent, leaving gaseous acetylene at high pressure or may cause static electricity sparks. There is any sign of smoke; There is an unusual smell with gas discharged. The accident caused 23 deaths and 22 injuries. An explosion of the cylinder only three minutes after a flashback is extremely rare. Serious Injuries are Common Following Acetylene Explosions An acetylene explosion causes injury and even death to people and their pets from the force of the blast, falling or flying debris or shrapnel, and the flame. The contents gauge shows a pressure higher than 2750 kPa. Paper presented at the First International Conference on Engineering Failure Analysis (Lisbon, Portugal, 12–14 July 2004). Health and Safety Executive, Harpur Hill, Buxton SK17 9JN. In the event of a leak – no matter how minor – gas can build up in the vehicle and result in a fire or explosion. Use a well-ventilated vehicle to transport acetylene. By continuing you agree to the use of cookies. If acetylene cylinders have been transported or stored horizontally, allow them to stand vertically for at least 30 minutes before use. Acetylene cylinders contain a porous mass and liquid acetone that dissolves the gas. Within the industrial gases acetylene has a special position in particular due to its abi lity to decompose explosively without the presence of air or oxy gen: C2H2  2 C + H2 ΔH = -227 kJ/mol Instantly, there was a bang and flames were seen coming from a coil of oxygen and acetylene hoses on the deck. The Acetylene Gas Cylinder Explosion I 1993n., a n ex­ plosion occurre idn a suburb of Sydney causing the deat ohf a driver of a truck who was loading acetylene and oxygen cylin­ Acetylene Cylinder Risks. Ignition can travel towards the cylinder but is normally stopped by the flash-back arrestor, which prevents decomposition of the acetylene or an explosion. AVENUE DES ARTS 3 … In 1993, an explosion occurred in a suburb of Sydney causing the death of a driver of a truck who was loading acetylene and oxygen cylinders at a transport yard. Three minutes later the cylinder exploded. A member has reported an incident in which a sub-contractor’s oxygen and acetylene cutting hose burst and caught fire. Copyright © 2005 Elsevier Ltd. All rights reserved. Every year, fire and rescue services attend hundreds of fires and incidents involving acetylene cylinders. All acetylene cylinders should be checked, using a soap solution, for leakage at the valves and safety fuse plugs. ACETYLENE. The characteristics of the failure morphology, which is entirely ductile, are discussed. If a cylinder explodes it can cause: Travelling fireballs; Projectile hazards; Structural damage to near by buildings This paper considers the failure of an acetylene gas cylinder which occurred under extreme loading conditions resulting in severe fragmentation of the cylinder. Explosion hazard of acetylene cylinders An acetylene cylinder has a different design from most other gas cylinders. THE UNIQUE ACETYLENE CYLINDER . How big can a gas cylinder explosion be? Once the fire has been extinguished, dissolved acetylene cylinders which have been involved in the fire need to be cooled for a total of 24 hours. Its lower and upper explosive limits in air are 2.5% and 93%, respectively. Bonfire tests with fully loaded cylinders with 8.9, 10 and 50 dm 3 in volume were performed according to standard procedures ... Acetylene cylinders exposed to radiation from a remote fire. The cylinder is heated accidentally. Many acetylene cylinders are collected and transported in unventilated vehicles. %PDF-1.5 %���� The acetone in the cylinder must not be granted to enter the blowpipe, in other respects, an explosion can occur. One curious discovery of acetylene is on Enceladus, a moon of Saturn. result in fire or explosion. This combination thwarts decomposition, which generates heat and can lead to ignition and explosion. The largest part shot through window and traveled 1, John Hodges. An explosion occurs in the regulator or hose. I did it outside and the wind blew out my burning splint. In the event of a leak – no matter how minor – gas can build up in the vehicle and result in a fire or explosion. Decomposition of the acetylene is triggered by heat, eg when it is: Decomposition is caused by: Exposure to intense heat; Reaction to incompatible substances such as copper or brass Acetylene cylinders must never be transported or stored in a closed vehicle. The acetylene valve on the quad was slowly opened; the welder then opened up the oxygen and acetylene valves on the cutting head and ignited the tip. An explosion in Invercargill that left one man seriously injured was probably caused by a leaking acetylene gas cylinder that came into contact with an ignition source. 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