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Pumping n-heptane

Pumping n-heptane

Pumping n-heptane

(OP)
I have an issue involving the transfer of n-heptane from a tanker truck to a 15Kgal stainless storage vessel.  

Question 1:  what is the recommended velocity of fluid (heptane) through this distribution system (static buildup prevention)?  The system was designed for 5ft/sec, but I cannot find a reference in NFPA to back this up.  5ft/sec is mighty slow.

Attributes of system (to preclude addn'l questions):
Nitrogen powered diaphragm pump,2" sch10 316 stainless piping, gounded/bonded throughout, Nitrogen blanketing on tank.
 

RE: Pumping n-heptane

5 fps isn't too slow.  That's right about where it should be a small diaphram pump (NPSH acceleration head).  

Through a 2" pipe, how fast are you going to fill anyway???

http://virtualpipeline.spaces.msn.com

"What gets us into trouble is not what we don't know, its what we know for sure" - Mark Twain

RE: Pumping n-heptane

Al...

I agree with "Biginch".... 5 fps seems reasonable

According to my trusty Crane 410, 5 fps in a 2"NPS pipe gives you a flowrate of about 55 gpm.

That means a 4000 gallon truck will fill in ~ 72 minutes.

"Mighty slow"...???

NFPA is not going to tell you how to design your piping systems

-MJC

   

RE: Pumping n-heptane

Be aware that a filter or strainer in the line may generate a charge that will need time to dissipate. Hightly purified hydrocarbons need a long time for a charge, once generated, to dissipate. Check OSHA regs 1910.106 which require fill pipes to terminate within 6" of  the bottom of the tank for some classes of liquids.

HAZOP at www.curryhydrocarbons.ca

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