NORMAL PENTANE STORAGE TANK

[Samingme755]

hi
whats the corrosion allowance for INTERNALS ON EACH EXPOSED SURFACE for tank internals maerial is KILLED CARBON STEEL
thanks in advance

 

[LittleInch]

What's the corrosive fluid / mechanism?

Basically anything you want it to be from 0 to 6mm

If you have no water then zero. If you do either coat the floor and 1m up the side or add 3mm.

Your design, your choice.

 

[IFRs]

Pentane is gennerally not corrosive to the steels used in API 650 type aboveground storage tanks. However, I'd add 1/16" minimum becasue the tank inside will be exposed to air as you fill and empty, and most air contains some moisture content which can condense on the tank and fixed roof. If you are in a tropical marine environment exposed to moist, salty air then maybe 1/8". If you think there will be water in the Pentane (which may be ahrd to avoid depending on your feed stream), follow LittleInch's advice and coat the bottom and 36" up the tank shell.

If you are getting the Penatne directly off a refinery process it may be warm enough and have a high enough TVP to require a chiller to be able to go into a floating roof tank.

 

[georgeverghese]

Use a pressure vessel with higher design pressure for C5 storage, else vaporisation loss in summer will be too much with API 650 / 620 tank.