Design Of Fabricated Steam Jackets

By Virginia Richardson


Indirect heating of substances in industries is widely embraced. Large cylindrical containers are surrounded with a casing to facilitate heat exchange between their walls. A circulating circuit with steam is fitted in the space of the two structures. This is capable of maintaining the desired temperature of the contents in the buffer. A suitable scheme is determined to construct the fabricated steam jackets.

The casing can be fully continuous or discontinuous. They are identified differently on a plan since the nature of lines indicating them are different. Continuous means that all parts are covered including flanges, tees and welded parts while the opposite is the case for discontinuous. The type of insulation is indicated at the end of the lines to stipulate the vapor lines.

Vapor is circulated using coils in the space between the walls and the envelope. The area is calculated to ensure proper heating of the cylinder. The inlet pipe should be elevated above the one that is collecting the condensate. It is also fitted with a trap to force the cooled water fumes out to the outlet. This outline enables to have outstanding performance of the whole setup.

Since there are two different categories of housing, the circuits layouts and connections vary. There are instances of having a jump over to connect a tapping point which is below to an adjacent section. They also carry the fumes and cooled water. The arrangement is such that is there are vertical pipes they should not exceed one meter. The layout should reduce the potential of condensate becoming semi solid.

Welded portions should not be hidden. They must be exposed to and accessible for the purpose of testing. Visual and non-destructive inspection is necessary. Longitudinal welded joints should not cross each other. They are scattered all over the surface. Valves should be able to handle the fluctuating flow rate at the header and exit. Standard specifications should be adhered to completely.

The standard material used for construction is standard steel. At times, the processes in that industries may involve corrosive temperature. Better materials are thus invented to replace those incapable of delivering. When deciding which is applicable, several aspects should be considered by those involved in that project. Other substances can be used for the same purpose.

Testing procedure cannot be overlooked. Hydrostatic testing is carried out on the housing. Nondestructive and visual inspections are done to ensure that the standards are met for operational purposes. This is carried out before vapor is allowed in this system. It is a means of ensuring that safety is adhered to and operations can commence.

To end, it is obvious that the work involved forms a major task. Selecting components to be used and the material they will be made of should follow some specific procedure acceptable. Each and every segment of that design is important to ensure that the housing serves the life it is required of it. Layout should be as expected.




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