PUMP MATERIAL

[purnawan]

Which material is the best for pump to handle Ammoniated phosacid liquid, HA 28.5 : 654 SMO : HV 9
Ammoniated phosacid : 28-48% P2O5 - N/P :0.1-0.l42 - 10% solids - 5% H2SO4 (MAX). Traces Cl- , F
HA 28.5 : 26-28 % Cr : 5-7 % Ni : 3-4 % Mo : 0.03-0.46 % C
654 SMO : 24 % Cr : 22 % Ni : 7.3 % Mo : 0.01 % C
HV 9 : 19-22 % Cr : 24-26 % Ni : >4 % Mo : 0.04 % C

 

[BRT549]

A good material to use is CD4MCu, a cast duplex stainless steel (UNS J93370). It's composition is 26%Cr, 5.4%Ni, 2.0%Mo, 0.04%C. We use it extensively in our mono-ammonium phosphate granulation plant, as well as the phos acid production facility.

I know it's available in Wilfley and Duriron pumps, and it is probably offered by other pump manufacturers as well.

The HA 28.5 you mentioned should be a good material. The others (654SMO and HV9) have higher Nickel content and will be higher cost without improved performance.

 

[GRoberts]

ASTM A890 lists several 25% chrome duplex stainless steel available as cast pump bodies. Flowserve, Union, Goulds, & sulzer also offer duplex sst pumps.

 

[PVRV]

API-610, Appendix H