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Spontaneous ignition of gas turbine lubricants at temperatures below their standard auto-ignition temperatures
In order to determine how process conditions can influence minimum auto-ignition temperatures in gas turbine enclosures, and other industrial installations, a novel type of calorimeter has been developed at HSE's Buxton research laboratory. This instrument, a Spontaneous Combustion Calorimeter (SCC), has been used to investigate the ignition properties of pure substances, such as n-heptane and compare the results with minimum ignition temperatures determined using standard methods. This was followed by a more detailed investigation of the ignition of gas-turbine lubricants. Source: http://www...
Explosions sur le lieu de travail
Une explosion sur le lieu de travail a souvent des conséquences terribles, sur le plan tant humain que matériel et économique. Les activités qui impliquent des manipulations de produits chimiques ou de poussières combustibles sont les plus concernées. La priorité est toujours d'empêcher la formation du phénomène. Et s'il survient néanmoins, d'en atténuer les effets. Source: Travail & Sécurité , Numéro 774, Juillet-août 2016. http://www.travail-et-securite.fr/ts/dossier/Atmosph...
Ventilation of vehicles used for carriage of acetylene
Following a fatality caused by an acetylene gas explosion involving a van carrying oxy-acetylene welding equipment, HSE commissioned research to investigate foreseeable gas leak rates, vehicle ventilation rates and possible vehicle modifications that would increase the ventilation rate and hence help to mitigate the explosion risk. Source: http://www.hse.gov.uk/research/rrhtm/rr1027.htm
Response of small-scale blackpowder storage in partitioned wooden boxes to external fire
Research has shown that when a partitioned wooden box containing twenty five plastic bottles, each bottle containing 1 kg of blackpowder is exposed to an external wood fire, the bottles of powder do not explode en masse but ignite over a short period of time. Fire resistance times for the specified box design of no less than 8 minutes were observed before blackpowder ignitions started to occur. Following blackpowder ignitions within the wooden box, ejection of full bottles of blackpowder may occur with bottle ejection distances of up to 5 m having been recorded. In the event of an incident involving...
Generation of flammable mists from high flashpoint fluids: Literature review
Hazardous Area Classification (HAC) for explosive gas atmospheres is well established, with guidance published in various standards and industry codes of practice. However, the same situation is not currently the case for high flashpoint liquid releases that could give rise to an explosive mist atmosphere. There is a pressing need for clear guidance on mist hazards to allow operators to determine the extent of areas where flammable mists may be present and to select appropriate equipment for use in those areas. This report provides a survey of the recent literature on flammable mists and pulls...
Méthanisation de déchets issus de l’élevage, de l’agriculture et de l’agroalimentaire
La valorisation des déchets et le développement d'énergies renouvelables sont des enjeux environnementaux d'actualité. La méthanisation répond à ce double objectif. Les déchets issus notamment de l'agriculture (effluents d'élevage, végétaux...) et de l'agroalimentaire permettent de produire du biogaz valorisable. Toutefois, les procédés de méthanisation mettant en oeuvre ces déchets génèrent des risques particuliers et nécessitent donc des mesures de...
OSHA Releases Booklet for Responders Encountering Combustible Dust
OSHA has issued a new booklet, "Firefighting Precautions at Facilities with Combustible Dust," to aid emergency responders who may face fires and explosions caused by combustible dust. The primary purpose of this document is to protect emergency responders from harm by giving them a framework for gathering the necessary information prior to an emergency and converting it into safe operating procedures. In this document, emergency responders include firefighters, fire brigade members, hazardous materials teams, and others who might be called upon to respond when a fire or explosion occurs...
Risk assessment for VCE scenario in an aerosol warehouse
In 2006, Dr Graham Atkinson of HSL was asked by HSE to review the risks from fires in large aerosol stores (Atkinson, 2007). Atkinson reviewed incident statistics and reports and concluded that the greatest risk to people from such fires was from explosions, not from the fire itself. He postulated a vapour cloud explosion (VCE) mechanism, whereby a fire of material elsewhere in the warehouse from the aerosols could give rise to a hot air layer close to the ceiling. Aerosols stored close to the ceiling could then fail and release their flammable contents, but not be immediately ignited by the fire...
Explosions de poussières dans les lieux de travail
Recensement et analyse La mise en oeuvre de poudres ou de produits pulvérulents combustibles peut entraîner, dans certaines conditions, la formation d'atmosphères explosives (ATEX). Cent quatre-vingt-dix explosions de poussières, survenues sur la période de 1903 à janvier 2010, ont été répertoriées dans la base de données ARIA du BARPI. Cette étude a porté sur les secteurs d'activité pour lesquels des explosions ont été recensées. Il s'agit des secteurs du bois, des...
Recommendations for a New Rock Dusting Standard to Prevent Coal Dust Explosions in Intake Airways
The workings of a bituminous coal mine produce explosive coal dust for which adding rock dust can reduce the potential for explosions. Accordingly, guidelines have been established by the Mine Safety and Health Administration (MSHA) about the relative proportion of rock dust that must be present in a mine´s intake and return airways. Current MSHA regulations require that intake airways contain at least 65% incombustible content and return airways contain at least 80% incombustible content. The higher limit for return airways was set in large part because finer coal dust tends to collect in...
Fire and explosion properties of nanopowders
The Health and Safety Executive commissioned this project to investigate the potential fire and explosion hazards associated with nanopowders. Test equipment and procedures were developed to assess the key properties of a selected number of nanopowders. Source : http://news.hse.gov.uk/2010/02/23/rr782-fire-and-explosion-properties-of-nanopowders/?rss=Research
Preventing Dust Explosions: The Human Element
Plant managers need workers' help to control dust and eliminate ignition sources, which are the easiest ways to minimize the chances of an explosion. In fact, workers often are crucial to reducing and preventing dust explosions. http://ohsonline.com/Articles/2008/12/Preventing-Dust-Explosions-The-Human-Element.aspx?Page=1

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