HELP TO CHOOSE MATERIALS

[RogerF]

I have to choose materials for the following equipment with parameters as under:

Separator
medium = oil, gass, water * pressure 16 bar * temp 67 deg C * Partial pressure CO2=0,06 bar * 280ppm H2S

Gas Cooler
medium = oil, gass, water,seawater * pressure 3 bar * temp 37 deg C * Partial pressure CO2=0 bar * 280ppm H2S

Cooler
medium = oil, gass, water * pressure 36 bar * temp 50 deg C * Partial pressure CO2 0,04 bar * 280ppm H2S

Cooler
medium = oil, gass, water * pressure 139 bar * temp 73 deg C * Partial pressure CO2 0,57 bar * 280ppm H2S

Scrubber
medium = oil, gass, water * pressure 11 bar * temp 30 deg C * Partial pressure CO2 0,04 bar * 280ppm H2S

Scrubber
medium = oil, gass, water * pressure 138 bar * temp 88 deg C * Partial pressure CO2 0,57 bar * 280ppm H2S

Compressor
medium = oil, gass, water * pressure 138 bar * temp 88 deg C * Partial pressure CO2 0,57 bar * 280ppm H2S

need materials with low density because of weight problems.

Can anyone help me??

 

[JimMetalsCeramics]

Cost can be a factor in materials selection. Ignoring that, it sounds like your biggest concerns are pressure differential, thermal transfer and corrosion resistance.

For some of your parts, ceramics might be an ideal solution. For others, stainless steel might be. It will be necessary to know more about you parts, in particular:

-overall size,
-key properties you wish to have for each, and
-tolerable costs.

Also, will these parts be of particularly complex shapes. You may wind up making your final selection for reasons of cost and fabricability and not just performance.