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letter 49155

Material of construction for 300m3 HCl Tank?


A discussion started in 2008 & continuing through 2017 . . .

June 27, 2008

Q. I'd like to build a HCl tank 33% volume 200-300 m3. What is the suitable material for this tank? There are several options: Steel tank with rubber lining, steel tank with FRP lining or FRP tank. Please advise.

Thank you

Hartono Salim
product engineer - Jakarta, Indonesia


June 27, 2008

A. Hi, Hartono. In my own experience I would not take option two as this would comprise a rigid liner inside a rigid steel tank with the two materials having different coefficients of thermal expansion.

Option three offers complete freedom from corrosion, whereas with option one the outside of the tank would rust and corrode and require maintenance. On the other hand, if there is any chance of mechanical damage, for example fork lift forks running into the tank, option one sounds safer. We in the metal finishing industry are accustomed to working with tanks smaller than the 44,000 to 66,000 gallons you are dealing with, so I can't offer knowledgable advice about secondary containment requirements, and there may be issues in your application that I am unfamiliar with. Good luck with it and let us know what you end up doing.

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


July 1, 2008

A. Hi Hartono,

I am biased towards using PVC ... the dual laminate approach where one bonds FRP to the PVC.

FRP by itself can be permeated, not so with PVC.

40 odd years in the plastic's fabrication spectrum.

freeman newton portrait
Freeman Newton
White Rock, British Columbia, Canada

(It is our sad duty to
advise that Freeman passed away
April 21, 2012. R.I.P. old friend).




Short term storage of HCl in Steel Tank

May 18, 2017

Q. Kindly let us know if HCL Chemical is stored in Steel tank (for Short Duration without usage) can it increase the iron content in the HCl chemical? If so, how to subsidize the iron Content? How to Set the Tank with same Chemical.

Guru D
- Bangalore, Karanatak, India

May 2017

A. Hi Guru. HCl must not be put into a steel tank at all. Recognize that the reason the iron content increases, is because the tanks walls are being consumed by the acid. If you are confident that the tank is still structurally sound, put a removable plastic lining (bag liner) in the tank first.

Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey
Striving to live "Aloha"



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