Pipe Material Selection
Pipe Material Selection
(OP)
Hi to all,
What type of material should be used for the inlet and transfer pipes of crude oil to cylindrical furnace if the operating conditions are as follows:
• Inlet Line: Max. Pressure: 220 Psi, Max. Temperature: 360 °F.
• Transfer Line: Max. Pressure: 60 Psi, Max. Temperature: 600 °F.
It is convenient to use carbon steel pipe such as ASTM A-106 Gr. B, or it is better to use an alloy steel such as ASTM A-335 Gr. P9 considering that there is biphasic fluid and entrainment of solids such as coke formed in the furnace.
Any suggestions on how to support the choice of one or the other material for this case?
In advance thank you very much for the help.
What type of material should be used for the inlet and transfer pipes of crude oil to cylindrical furnace if the operating conditions are as follows:
• Inlet Line: Max. Pressure: 220 Psi, Max. Temperature: 360 °F.
• Transfer Line: Max. Pressure: 60 Psi, Max. Temperature: 600 °F.
It is convenient to use carbon steel pipe such as ASTM A-106 Gr. B, or it is better to use an alloy steel such as ASTM A-335 Gr. P9 considering that there is biphasic fluid and entrainment of solids such as coke formed in the furnace.
Any suggestions on how to support the choice of one or the other material for this case?
In advance thank you very much for the help.
RE: Pipe Material Selection
RE: Pipe Material Selection
The second is getting a bit high temperature so you need a metallurgist to have a look.
Erosion is more of a velocity issue. Any metal is going to differ if you've got loads of solid at high velocity. Then you start to need ceramics.
Length becomes important. 50m of something exotic might be OK but not 1500m.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Pipe Material Selection
Sorry, I forgot to mention the following information:
The inlet line (NPS 10") comes from a preheating exchanger and is approximately 55 m long.
The outlet line (NPS 16") goes to an atmospheric distillation column and is approximately 65 m long.
RE: Pipe Material Selection
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
RE: Pipe Material Selection
RE: Pipe Material Selection
While crowdsourcing may be wonderful for developing short stories, screen plays, movies and lesson plans its use may be folly when designing and selecting expensive refinery piping.
Always remember, here at ENG-TIPS.COM .... you get what you pay for !!!
MJCronin
Sr. Process Engineer