External Reinforcement for the Shell

When there is a possibihty of development of high vacuum due to rapid condensation in the shell, it can collapse inwards. Reinforcing flats, angle irons or C chaimels should be welded along the circumference for reducing the L/D ratio. The shells should be fabricated of thicker plates for added strength. 

In case of the possibility of the choking of the tubes due to scales/dust carried with the vapours, provisiou of a cleaning nozzle should be available to insert wire brush in the tubes and remove the sludge from bottom. This will enable unit to be cleaned without dismanthug. 

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Provision of external reinforcements for the shell (it may collapse due to spray of excess water when steam supply is too less.)... 

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