The material type to be used for high temperature environment like as heat treatment is AISI 310. The operating temperature of this material is above 1000°C.
In these types of drums, there is more gain in strength where there is less joints. Therefore conical parts are manufactured from 2 identical pieces and has just 2 welding joints.
The drum body is also manufactured from 2 identical parts which are assembled by welding. The seals are located on the edges purposely as the corner turns are more durable when compared to surface plate. When assembling the conical parts to the drum body, the seals on the conical parts are located asymmetrically with the seals on the body. The reason for this is also to increase the strength.
Original AISI 310 welding wires are used in all welding processes.
And now the “heat treatment drum”, which will be exported, is encased and ready for delivery…