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-----THE BEST sulfurIC ACID PIPELINE MATERIAL
Q. I AM TRYING TO FIND THE BEST MATERIAL USED FOR THE TRANSPORTATION OF 92 TO 96% H2SO4 THROUGH A 14-INCH PIPELINE, 20 KGF/CM2, AMBIENT TEMPERATURE (MAX 60 DEGR. C) WHERE 7 KM OF IT RUN UNDERGROUND AND 2 KM AERIAL IN A MARINE ATMOSPHERE. IT IS IMPORTANT TO KNOW IF SUCH INSTALLATION EXISTS AND, IF THERE IS ONE, WHERE IT IS LOCATED.
ULISSES AMADOPipeline Engineer - RIO DE JANEIRO, RIO DE JANEIRO, BRAZIL
September 1, 2008
A. Hi Ulisses,
My preference would be towards a PVC dual laminate material. Why dual laminate? Because the fibreglass would add strength to the PVC.
Cheers
Freeman Newton [deceased]
R.I.P. old friend (It is our sad duty to
advise that Freeman passed away 4/21/12)
Q. Dear Freeman,
Thanks for your suggestion, but in this case the use of PVC (polyvinyl chloride) is not available. As I mentioned before in my question, the pipeline will be constructed under the ASME B31.4 code (Pipeline Transportation Systems for Liquid Hydrocarbons and other Liquids). We are thinking of using carbon steel API 5L Gr. B specification and I would like to know about any experience regarding corrosion on this material (liquid velocity 1.8 ft/s).
- Rio de Janeiro, RJ, Brazil
A. Hi again Ulisses
You say that PVC is not available .. that I sure DON'T believe.
My background is mainly in plastics and were you to use PVC, then cemented joints must NEVER be backwelded immediately but after minimum 24 hours.
Re steel ... well, that would be OK UNLESS air got at it because steel is OK for conc. sulfuric BUT with air ingress you'd dilute the sulfuric and get immediate corrosion due to that acid's absorption of moisture from the air.
Freeman Newton [deceased]
R.I.P. old friend (It is our sad duty to
advise that Freeman passed away 4/21/12)
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