There is std called PFI standard ES-24 which is a manufactuer std. You can find the anwser there. Depend on how you bend it and the radius of bend, the thining can be big diferent. For furnae bending, from 3D to 6D, the thining can be 25% to 6%.
Clinddu
GLRYCLOUD,
the purpose to use hot oil is to increasing the temp diffrential between bath and crude. Since the crude is very sticky and heavy, this mothed can increase overal U of heat trandfer. If ues water bath, the heat transfer in bath side is not problem, but crude side will controll overall...
thanks, tickle,
I am sorry I did not make the it clearly. The indirect heater is used fire to heat hot oil bath and then heat thick crude in coils. Thus the U is far less than water bath. This why the heater volume needs to be much bigger.
Thanks for your kindly reply.
Clindu
Rosbrugh,
Thanks a lot. The problem is the heat media is hot oil. The heater is used to heat crude oil from 25 DEG C to 45 DEg. C. And the oil burner will be used.
I think the size will be much large than that, isn't it?
please size it per firetube duty 25MM btu/hr.
Clindu
Speco,
thanks for you help, but after I checked the web site. I found all of them are direct heaters. I knew direct heaters can be much large than 10 mm btu/hr, but my question is about the INDIRECT heater. anyway, thank you much.
Clindu
Dear Sirs:
What is biggest and ecnomical scale of indirect heater? So far I've seen 10 mm Btu/hr. My customer need 25 mmbtu/hr. I think the size will be too huge to ship.
Clindu
Jagessar,
I have used Cad worx for two yrs. I think it is good enough. besides, it is cheapest software for piping and compatible with piping analyis software (caser II, same company products). I already suggest my new employor purching this one for us.
Good luk
clindu
I did not find things related to ASME, but as I knew that some big oil companies specifiedas follows:
For sockweld, 2" min clearance
For butt weld 4" min clearance
Between two circ. weld.
Clind
Could anyone tell me what the "rotate equipment" mean?
I think that pumps and compressors are includd in them. Is there any others.
What should a mechanicla engineer know about them? any recommend referce book?
Thanks in advance,
Clinde
Alberta, Canada
For a such heavy oil, I'd recomend you have some oil test before you design the treater. That can help you find a good Temp-Residence time poing. Otherwise, you should have comparable dada for similar project. The time is not only depent on the oil desity, but aslo depent on compositon, sanity...
