Difference Between Blowing and Purging

[Hafiz Ali Alvi]

Hello All,

 

My question is about difference between Blowing (e.g Steam Blowing) and Purging (e.g Nitrogen Purging). What is the main difference between these two operations and for what service we use it.

 

Regards.

 

Hafiz Ali Alvi

 

[TV Ramakrishna]

Dear Hafiz,

 

Steam blowing will be done generally to clean the steam piping before put the steam piping into service this will remove all loose mill scale, rust and foreign materials from piping. If left uncleaned, these particles will reach steam turbine blades through piping and damage them. Used for steam piping and steam circuits of boilers - power plants

 

Nitrogen purging is charging the piping with nitrogen gas before charging the line with hydro carbons/chemicals to make them inert (to displace the atmospheric air which contains oxgen) to avoid any explosion/chemical reaction. Used for hydrocarbon piping, pressure vessels, equipment etc. - oil and gas

Regards,

T.V.Ramakrishna.

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