material for pump impeller
material for pump impeller
(OP)
Gents,
we have a duble suction pump for tar service (dirty) fitted with ductile iron material. last inspection , the impeller were erroded very badly and pin holes were on the wearing ring location. the inlet blad tips are toptaly erroded and the discharge blade tips are erroded as well.
this pump is operted at cavitation condtions and pumping polymer sluges.
is SS316 or 410 adequate for the service?
upm
we have a duble suction pump for tar service (dirty) fitted with ductile iron material. last inspection , the impeller were erroded very badly and pin holes were on the wearing ring location. the inlet blad tips are toptaly erroded and the discharge blade tips are erroded as well.
this pump is operted at cavitation condtions and pumping polymer sluges.
is SS316 or 410 adequate for the service?
upm





RE: material for pump impeller
RE: material for pump impeller
If the above is not possible then CA6NM can beused instead of 410 or316.
Ductile iron is a wrong selection of material for such an application.
RE: material for pump impeller
thanks for the information and sorry for the reply delay.
i need to work out the running clearances for the new material. any idea where can i find the thermal expansion constant
upm
RE: material for pump impeller
RE: material for pump impeller
thanx
upm
RE: material for pump impeller
-Simple electroplating of chromium.
-Thermal spray coatings (e. g., Cr, MCrAlY, ceramic).
-Conversion coating (furnace carburizing, nitriding or boronizing, or plasma nitriding).
With a good coating, you might avoid the need for stainless steel. A quench-hardened steel would be a plus.
NO, on the bronze.
RE: material for pump impeller
RE: material for pump impeller
RE: material for pump impeller
Thanks for the great help. ceramic spry coating would be the best as we can do it locally. can we do the coating with brush or it needs to be spray coating?
do i need to coat the impeller only or the impeller and the wearing rings? if so , i need to work out the new running clearances as the thermal expantion will be different, am i correct?
thx. gents and hope to hear from you
upm
RE: material for pump impeller
RE: material for pump impeller
can you tell me pls. how can i get the coating procedure for the spry ceramic coating? we are shortage of coating againts here and i need to explain to the local againt the way it should be
thanx again
upm
RE: material for pump impeller
Feel free to contact me directly if you would like some additional information (matt.hinckley@tmtresearch.com)
RE: material for pump impeller
RE: material for pump impeller
i am located in the middle east where such a specilized application is very limited.
upm
RE: material for pump impeller
http://metalock.co.il/
Ceramic coatings are applied through high deperature spraying (above the meting point of the ceamic). Such processes include:
HVOF, Super D-Gun, and Vacuum Plasma Spraying. If you have enough volume, you might purchase a system.
RE: material for pump impeller
Thanks for the info.
RE: material for pump impeller