A key gas in the ripening of fruits and manufacture of plastics and detergents, ethylene is also produced naturally by plants.

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Although not flammable, this compound induces combustion in other substances and can only be stored in specific metal alloys due to its highly reactive nature.

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Traffic signals, signs and pavement markings are used for traffic control to provide a smooth, orderly flow of traffic. Traffic signals apply to drivers, motorcycle riders, bicyclists, moped-riders and pedestrians. They convey important information about the road conditions, potential hazards and other obstacles.

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The Globally Harmonized System (GHS) defines flammable gases as those with a flammable range under standard conditions of temperature and pressure (STP). Gases remain gaseous under normal atmospheric conditions, while vapours are the gases emitted from volatile liquids.

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FLAMMABLE gases occur in various forms, from naturally occurring methane to pure substances like hydrogen and evaporation products like acetone. Handling these gases requires a deep understanding of their properties and safety limits, making the study of safety data sheets (SDS) essential for anyone working with these substances.

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A critical aspect of working with flammable gases is understanding their lower explosion limit (LEL) and upper explosion limit (UEL). These limits define the concentration range within which a gas can form an explosive atmosphere when mixed with air and exposed to an ignition source. For instance, hydrogen gas becomes explosive at concentrations above 4% and below 76% in air.

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It is important to understand the conditions that can lead to industrial and household explosions. Methane leaks are common in households, but did you know that methane can accumulate underground naturally and cause significant risks? Another setting in which flammable gases require extra safety measures are spray painting facilities. In these explosive atmospheres, strict safety protocols are vital to prevent explosions.

Propane is versatile, used in both vehicles and as a fuel source in remote areas, and is known for its ability to liquefy at moderate pressures.

Used in semiconductor manufacturing, silane is pyrophoric and requires careful handling due to its spontaneous ignition in air.

Flammable gases are valuable in many areas, but they must be handled with care and knowledge. Staying alert and educated is key to using these gases safely and effectively.

Used in fertilisers and as a refrigerant, ammonia is efficient and cost-effective. However, it is also toxic and corrosive, with a pungent odour that aids in leak detection.

Catch up on the latest news, views and jobs from The Chemical Engineer. Below are the four latest issues. View a wider selection of the archive from within the Magazine section of this site.

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Explore the complete article for more in-depth insights, proudly presented by Armadex, your trusted provider of explosion-proof devices for hazardous environments.

SDSs are critical in providing information on the handling of flammable gases, their hazards, and emergency measures. It’s a legal requirement to review these documents before working with any flammable substances.

Road markings guide and warn drivers as well as regulate traffic. Markings may be red, blue, yellow or white. They may be used alone or in combinations. Each has a different meaning. Read the Signs, Signals and Markings section to learn about traffic control devices, road signs, signals at the intersections, road markings and right-of-way laws. This basic information will be the first step on the way to excellent driving.

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Consider this real-life example of UEL and LEL. The survival of over 60% of passengers in the 1937 Hindenburg disaster, where a hydrogen-filled airship fell 61 metres, is attributed to the nature of the hydrogen gas leak. The gas, upon leaking, ignited and rose, taking most of the heat upwards, away from the passengers. Although the airship’s material burned, the hydrogen gas itself was too concentrated to cause an explosion. It only burned where it met the air. Had it exploded, there likely would have been no survivors.

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Hazardous environments consultancy Armadex highlights the importance of safety data sheets (SDSs) when it comes to providing information on the handling of flammable gases, their hazards, and emergency measures

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