Jump to content



Latest Downloads


Recent Status Updates

  • Photo
      11 Jun
    Ajay S. Satpute

    Hi, I have started my own engineering consultancy in India. Converge Engineering Pvt. Ltd. For more information, please visit www.converge.net.in

View All Updates

Chemical and Process Engineering Resources

- - - - -





Category: Corrosion
Question: Are carbon steel storage tanks appropriate for NaOH solutions?
Keywords: v1i12,naoh,caustic,storage,tank,materials,carbon,steel,stress,relief,relieving
Answer: Carbon steel storage tanks can be used for NaOH storage tanks under certain conditions. Carbon steel tanks with no stress relieving can be used in the following situation:A. NaOH concentration below 20% by weight, up to about 160 ??F (70 ??C)B. NaOH concentration from 20-30% by weight, up to about 140 ??F (60 ??C)C. NaOH concentration from 30-50% by weight, up to about 120 ??F (50 ??C)The use of carbon steel tanks in this service can be extended by stress relieving welds and bends. A tank that has been stress relieved can be used in the following situations:A. NaOH concentration below 20% by weight, up to about 220 ??F (105 ??C)B. NaOH concentration from 20-30% by weight, up to about 210 ??F (99 ??C)C. NaOH concentration from 30-50% by weight, up to about 170 ??F (77 ??C)Beyond these constraints, a nickel alloy material will generally need to be considered. There are also some types of plastics that can be used for NaOH storage. Reference: Chemical Engineering Magazine, September 2000
Images:



0 Comments