Sources of ignition avoidance

Inflammable substances or mixtures of gases Sources of ignition Avoid these substances. Dilute to noncritical concentration. Avoid sources of ignition. Sufficient distance. Protective encapsulation, EX protection. 

Precaution Wear safety giasses fiammabie dust when fineiy divided and suspended in air keep away from sources of ignition avoid strong oxidizers Hazardous Decomp. Prods. None ADM Clintose CR15 [ADM Corn Processing]... 

It is recommended that flammability always be assessed first, since it is inherently safer to avoid flammable atmospheres than to avoid sources of ignition such as static electricity. If a flammable atmosphere cannot be avoided at all times, the system should be designed to minimize both the probability and consequences of ignition. In this chapter it is assumed that static electricity is the only source of ignition however, in practical situations all sources of ignition such as those described in [ 157] should be evaluated. 

An explosive decomposition in an ethylene oxide (EO) distillation column, similar in its results to that described in Section 7.3.2, may have been set off by polymerization of EO in a dead-end spot in the column base where rust, a polymerization catalyst, had accumulated. Such deadends should be avoided. However, it is more likely that a flange leaked the leaking gas ignited and heated an area of the column above the temperature at which spontaneous decomposition occurs. The source of ignition of the leak may have been reaction with the insulation, as described... 

The hazard of an explosion should in general be minimized by avoiding flammable gas-air mixtures in the process. Again, this can be done either by changing process conditions or by adding an inert material. It is bad practice to rely solely on elimination of sources of ignition. 

When synthesizing a process, the occurrence of flammable gas mixtures should be avoided, rather than relying on the elimination of sources of ignition. 

The source of ignition may be physical (such as a spark, electrical arc, small flame, cigarette, welding operation, or a hot piece of equipment), or it may be chemical in nature, such an an exothermic reaction, hi any case, when working widi or storing flammables, controlling the source of ignition is often the easiest and safest way to avoid fires or explosions. 

Other manufacturers state that all their valves meet this requirement simply by the way they are constructed, and they see no distinction from valves used to process non-flammable materials. To avoid confusion between those who claim correctly that their valves have no source of ignition, and are out of scope, and those who claim that they have done some very simple design change and wish to claim that their valves are now category 2 or even 1, it has been agreed that simple valves are out of scope. 

For larger spills, employees should stay upwind of the spill to avoid inhalation of epoxy components. Evacuate and rope off the spill area, and shut off all potential sources of ignition. The spill should be contained with a dike, and excess resin should be collected in suitable containers for final disposal. Hot soapy water or steam may be used for cleaning up the residue from floors or equipment. The use of solvents during clean-up should be avoided because of the hazardous nature of the solvent. 

Hazards Use care when handling 30% hydrogen peroxide. Keep it away from alcohol, ethers, and acetates to avoid formation of dangerous peroxides. Use the standard warnings when using concentrated sulfuricacid. Acetone is flammable so avoid contact with flames, sparks, and other sources of ignition. 

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