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Dear Friends ,
How much PH value of solution of water and chemical should be maintained while doing the De-scaling of condensers. If the solution is more acidic , it will damage the copper tubes and if its less then will not remove the scale effectively.
I think that it may depend on the product being used, the following link refers to a particular brand but shows PH levels between 0.5 and 0.7 for the different options.
Perhaps ask your chemical supplier.
http://descale.me/downloads/document...Exchangers.pdf
While plant operates , maintain the following parameters to avoid regular de-scaling
1) maintain alkaline ph .. 7+
2) address dissolved oxygen issue by additives ...... To avoid tubes pitting
3) maintain commercial hardness of cooling water around 5
4) provide tower bleed-off
5) maintain tower hygene
this will give you exceleent results on condenser life & plant perfformance . This will avoid sudden failures