Due to high corrosion(localised Pitting type)in Carbon Steel piping meant to handle sour water having H2S(800 PPM) and CO2 we are evaluating to use rubberlined CS Piping to handle both H2S & CO2 corrosion under service temperature of around 40 Deg.C.Due to application limitation(below 3" size)we...
Please tell me the procedure to find out the Road Work
Qty using the above terms.
b) Desining of Soakpit is a different issue and not connected with the above
I have some doubts in earth grading.
What is the expansion of these following terms.
PVI STA , A.D , K, PVC,PVI,PVT
For a labour camp , I have to design soakpit for 300 members.
Can we go for One big soak pit or something like a soak
trench.
Please check whether all connected pipelines are positively isolated by insulating flange.Especially in the above ground ST CP System ,getting inadequate protection is mainly due to current drainage to the neary by structure.Painting is not a big issue and even some people are advising not to...
We are using ERW pipes (below 12") in treated cooling water service the most the failures occured in the weld seam.Whereas no failure was reported in the DSAW/EFSW pipes.
We have analysed the failed piece in a reputed laboratory and the concluded with britle type fracture originated from the pre-existed slag.However,we have x-rayed the new material made of up nitronic grade and used a sound one.Then also the failure happens.
We had frequent failure of Visbreaker feed line control valve stem .Stem metallurgy is SS321.Feed sulphur percentage is about 4-4.5% Wt and temperature is around 425-450 deg.C. After repeated failure the designer has changed the metallurgy to Nitronic grade and even after changing the metallurgy...
We had frequent failure of Visbreaker feed line control valve stem(Breaking into two pieces).Stem metallurgy is SS321.Feed sulphur percentage is about 4-4.5% Wt and temperature is around 425-450 deg.C. After repeated failure the designer has changed the metallurgy to Nitronic grade and even...
Thanks for the reply.The problem is we have Carbon Steel tube sheet with limited space available to provide sacrifical anodes.Galvanic corrosion is a main problem if we choose either aluminium or copper base alloys.Will coating work to avoid galvanic corrosion.Can you specify the equiv.ASTM...
We have a chiller mainly used to cool the ambient air. Tube side medium is FREON(Operating temp is 5 Deg.C) and shell side is Air(Inlet-40 Deg.C & O/L is 10 Deg.C).The tube metallurgy is carbon steel A179.Due to continuous presence of moisture the tubes are getting corroded externally and severe...
