Section 408.14453. Crucibles.

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Rule 4453. A crucible shall:

(a) Not be used if it shows cracks, thin spots, flaws, or dampness.

(b)   Be stored in a dry place and protected from moist air.

(c)   Be carefully charged to prevent damage.

(d)   A crucible made of clay shall not be allowed to cool after being placed in service.

(e)     Be covered while   transporting molten metal emitting toxic    fumes      or be mechanically ventilated.

History: 1979 AC.

                    
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