Ignition sources hand tools

In general, many simple mechanical products do not fall under the scope of Directive 94/9/EC as they do not have their own source of ignition (see chapter 3.7.2). Examples without own source of ignition are hand tools such as hammers, spanners, saws and ladders. 

Certain substances on contact with water emit flammable gases in such quantities that explosive mixtures with air will be formed. Such mixtures are easily ignited by ordinary sources of ignition, for example naked lights, sparking hand tools, unprotected light bulbs, or by the heat of the reaction. IMO Class 4.3,1.2... 

Flammable liquids give off ignitable vapors. This, plus the fact that there are many ignition sources (such as a hand tool that sparks, or a cutting torch) at construction sites, is a real threat. Respect for, and proper use and care of flammable liquids is critical to a safe jobsite. 

Safety requires that floors be kept as clean and dry as possible to prevent accidental slips with or around dangerous hand tools. Around flammable substances, sparks produced by iron and steel hand tools can be dangerous ignition sources. Where this hazard exists, spark-resistant tools made from brass, plastic, aluminum, or wood will... 

The sensitivity of explosives to inflammation varies widely. Black powder can be exploded by a spark from a spark-producing tool smokeless powders are exploded by the brief flame jet produced by striking a percussion cap. On the other hand, the combustion of an ion-ex-changed -> Permitted Explosive, ignited by a gas flame, is extinguished as soon as the flame source is removed. 

Ignition Caused by Glancing Blows. Friction can cause ignition in other ways. Sparks may occur when two hard materials come in contact with each other in a glancing blow (the blows must be glancing to produce friction sparks). These kinds of sparks are not directly related to frictional impact. Hand and mechanical tools are the most likely sources of friction sparks that occur outside of equipment. The need for nonsparking tools is somewhat controversial Bodurtha states that it is extremely unlikely that anyone would be using tools in a flammable atmosphere, and it is usually more prudent to control the atmosphere than the tools. Sparkproof tools are not really sparkproof in all situations. 

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