Doosan Babcock has extensive experience in the mechanical design of the flue and duct systems for boiler plant. The air or gas pressure envelope is designed to withstand the imposed pressure differentials and to respond satisfactorily to gas pulsation and transmitted vibration produced by rotating plant. This extends to and includes the suspension and restraining devices attached to the cold building structure, but does not include this structure. Expansion joint duties are specified.
There are no national or international codes covering the sort of structures concerned, and so techniques from structural building codes and in-house methods are used to produce a safe and serviceable product.
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