Blast cleaning room

Door on blast-cleaning rooms shall be operable from both inside and outside, except that where there is a small operator access door, the large work access door may be closed or opened from the outside only. 

A) When working inside of blast-cleaning rooms, or... 

Blast Cleaning Room A complete enclosure in which blasting operations are performed and where the operator works inside of the room to operate the basting nozzle and direct the flow of the abrasive material. 

Doors on blast-cleaning rooms shall be operable from both inside and outside. 

All abrasive-blasting operators shall wear approved respirators when Working inside blast-cleaning rooms. 

The blasting equipment and the air cleaning equipment may be placed outside or inside the room. 

Shot blasting room A ventilated room devoted to the cleaning of castings by the use of various grades of shot. 

Illustration 5 Cleanly cut ventilation hole in the ceiling of the furnace room, opening into upper story. Note the damage caused by blasting. 

The inspector then places it on a pin-type conveyor which makes it possible for the air to circulate freely around each shell, thus as-.suring that the physical properties of each forging are the same. Each conveyor hook has two pairs of pins, one above the other, holding four forgings in all. By the lime the shell reaches the final inspection room, it is completely cooled. Here the shells are given a 100 per cent inspection before they are pas.sed on to the shot blast machine which cleans the inside cavity at the rate of two every 30. sec. After the cleaning operation they are oiled inside with a pre.s-.sure gun sprayer to protect the interior from rust while in transit to the machining contractor. 

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