Protective clothing designed for continuous wear for work activities in designated locations in which intermittent exposure to molten substance splash, radiant heat, and flame sources is possible.

Primary protective clothing is designed to be worn for work activities during which significant exposure to molten substance splash, radiant heat, and flame is likely to occur.

Such work activities include charging, taping, and pouring, during which work is carried out in close proximity to molten substances and hot surfaces and contact with either is likely.

Secondary protective clothing is designed so that it will not continue to burn after exposure to and removal of a source of ignition.  Protection against metal splash and radiant heat are secondary in intent

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