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hydrogen is a colorless, odorless, tasteless, highly flammable gas. it is also the lightest-weight gas. since hydrogen is noncorrosive, special materials of construction are not normally required. vessels and piping must be selected and designed to withstand the pressure and temperatures involved and
range, % to % in air, and the small amount of energy required for ignition necessitate special handling to prevent the inadvertent mixing of hydrogen with air. sources of ignition, such as sparks from electrical equipment, static electricity, open flames, or extremely hot objects, should be eliminated...
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