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Effective Steam Distribution System

In any steam plant or any process plant effectiveness of steam distribution system is dependent upon the project specific conditions like location and layout of the process plant and its steam consuming equipment like heat exchangers, decorators etc.
Steam distribution circuit is one of the major link between the steam production point and the point of end use i.e. process plant. Primary steam generating source are co-generation plant and Steam generators. However it not the source of steam generation but the effective and efficient steam distribution system that decides right quality (pressure and temperature) and quantity of steam to reach to the process through it. Thus designing of steam distribution is to be given due importance along with installation and subsequently maintenance during operation.

basic steam distribution In the above shown Steam distribution network steam carry pipes are the major contributors factors in deciding the cost and the quality of steam reaching the process.
The success of any steam distribution system is depend upon meeting the end process steam pressure requirement of the process plant. Thus distribution system is influenced by the factors like:

From the generating point to the user end, steam has to travel through the distribution network which comprises of steam pipe and other fittings and thus this steam have to undergone through the unavoidable pressure lose due to:

Advantage of Steam Generation at High Pressure

Following are the advantages of steam generation at high pressure:

Disadvantages of Steam Generation at High Pressure

Because of the high steam pressure following losses are increased: But the fuel consumption of the boiler is depend upon the connected load and not on the boiler output whether the boiler steam pressure at 4 bar(g), 10 bar(g) or 100 bar(g).
Generating and distributing steam at higher pressure, also requires necessary steam pressure reduction to suit the process steam pressure requirement at the point of use.

Pressure Reducing Valve (PRV)

pressure reducing valve prv In the above pressure reducing station separator is installed upstream of the reducing valve to prevent entrained and ensuring high quality steam to pass through. Safety valve on the down stream side protects the system, if PRV doesn’t work.

Sizing of Steam Distribution Piping

Steam piping plays a important role in meeting the end requirement of the process. Following are the critical aspects of this:
Proper steam pipe sizing to avoid any over or under-sizing of the steam mains.
Consequence of Over-Size Steam Pipe Consequence of Undersized Steam Pipe



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