The purpose of steam aging the leads and boards before test is to simulate storage conditions. For steam aging, distilled water in a non corrosive container should be suspended in a manner that prevents condensation on the leads. Prior to application of flux, it is required that all specimens to be tested be steam aged at a steam temperature 7 degree C below the local boiling point. This means that at sea level the steam aging should be 93 degree C.
In Steam air decoking apparatus, coke is deposited within the gas passages of a dual tower type, fluidized bed apparatus for thermally cracking hydrocarbon oils, which is removed by combustion through contact with a stream of an oxygen-containing, high temperature combustion gas without a need to disjoint the apparatus. The apparatus is comprised of heating and cracking towers each adapted for containing a mass of fluidized solid particles continuously recirculating between the two towers. In one embodiment, all of the solid particles are discharged from the apparatus and a stream of the oxygen-containing combustion gas, produced in a combustion furnace connected to the heating tower, is allowed to pass through the gas passages.
Steam Bath is operating most effectively at temperatures of between 43C(110F) and 46C(116F) and a relative humidity above 100%. This is recommended wherever generalized moist heat applications are indicated. Steam-tight cabin is used to prevent steam escaping and damaging the fabric of the surrounding room.