Pipelines at 1000 deg C 1

[hmatos]

Hi,

I´m working in a process plant design, and there are some pipelines of gas, at 1000 deg C (1832 deg F). And now, we need to specify the material for the pipes and fittings. I was looking for SS 310S, but I've never worked with this conditions before.
At the Triflex Analysis software, the SS 310S can be used until 816 deg C.

Can anyone please help me with this spec?

Thanks a lot,
Helio.

 

[TGS4]

Does the process require that the gas be in contact with metal, or can the pipe be refractory-lined?

 

[hmatos]

The customer prefer that the gas be in contact with metal, but if doesn't have any solutions we can use refractory-lined pipes.

 

[MJCronin]

You are interested in a piping design for 1000C (1832F) !!!!!!!

How hot do you think it gets inside a modern supercritical boiler ?

You have done the analysis and you are looking for a material !!!

The hottest tubes inside of a modern boiler are the superheater tubing and run at less than 1400F.

1600 F is a goal for the US Boiler program.

http://www.ms.ornl.gov/fossil/pdf/Proj463USCBoiler.PDF

Exotic chrome molly materials are used in this range....

At these high temperatures, all material have little strength and creep is the primary consideration.

 

[TGS4]

To follow-up with what MJCronin said - creep is the primary design consideration at these temperatures. What would the OPERATING temperature of the pipe actually be, and what is the desired life?

 

[stanweld]

Is this piping installed in a furnace in an olefins unit? If so, 35%Cr-45% Ni cewnt cast alloys are used as well as HP modified.

 

[XL83NL]

Centrifugally cast pipe may be an option, and recently I found a paper of fairly new alloys (I think it was Menaurite or something similar) which can go beyond 1000 C. Ill see if I can find the paper asap and provide you with a link. It may be the same kind of alloy as stanweld posted. Is it a pipeline or a piping system? Whats the code of construction? What lengths do you require? Are flanged/bolted joints required?

 

[GHartmann]

Here's a brief on the Menaurite:

http://www.manoir-industries.com/site/docs_wsw/fichiers_communs/docs/0409_hydrocarbon.pdf

Good luck.

 

[jtseng123]

I worked in the ethylene furnnce radiant coil in the past. The tube is in extreme high temperature like yours, the material is HP MOD alloy as stanweld has mentioned. Radiant coil in furnance is a evry long U tube that you can not put any support due high thermal growth. You just let it hang in there like spaghetti.

 

[XL83NL]

I think the link provided by GHartmann is the pdf I meant.
I have no experience with these high temperature, and Im not even sure which Code you're using ,and which pressure is required, but Manaurite may be a solution based on it's mechanical properties.
Not sure about corrosion, metallurgy, weldability etc.