Example 2-19 Sizing Steam Condensate Return Line

Example 2-19 Sizing Steam Condensate Return Line 

A 450 psig steam system discharges 9,425 Ibs/hr of condensate through traps into a return condensate line. The return header is to discharge into a flash tank held at 90 

Applied Process Design for Chemical and Petrochemical Plants 

VELOCITY AT PIPE EXIT WHEN DISCHARGING CONDENSATE AT SATURATION TEMPERATURES FROM VARIOUS PRESSURES TO ATMOSPHERE AT A RATE OF 100 POUNDS/HR. 

Read Chart At 450 psig and 576, the line size shows just under 2-in. Recommend use 2-in. 

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The pickup, transport, and redeposition of corrosion debris and deposits can happen anywhere in steam distribution and condensate return systems and are not confined to any particular boiler plant size or pressure rating. For example, deposit pickup may occur in a superheater with redeposition taking place perhaps in a pressure reducing station, steam trap, or condensate line. The starting point for transport mechanisms is often a combination of BW carryover and condensate line corrosion. 

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