SS for this water?
SS for this water?
(OP)
Hello.
We are currently designing some piping to convey sea water for RO plant.
Please help to find an optimal kind of SS for such analysis of water:
Na 6200 mg/l
Mg 45
Ca 40
HCO3 100
Cl 7300
SO4 1200
(temp=2-20 C)
We're examine such variant:SS316L.
Is there any reason to use SS316ti or duplex?
Sea water near Odessa (Ukraine)
We are currently designing some piping to convey sea water for RO plant.
Please help to find an optimal kind of SS for such analysis of water:
Na 6200 mg/l
Mg 45
Ca 40
HCO3 100
Cl 7300
SO4 1200
(temp=2-20 C)
We're examine such variant:SS316L.
Is there any reason to use SS316ti or duplex?
Sea water near Odessa (Ukraine)





RE: SS for this water?
Mark Hutton
RE: SS for this water?
RE: SS for this water?
RE: SS for this water?
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: SS for this water?
http://w
http://www.stainless-steel-world.net/pdf/11004.pdf
hope this help
S
Corrosion Prevention & Corrosion Control
RE: SS for this water?
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Plymouth Tube
RE: SS for this water?
The temperatures of the seawater are good for HDPE plastic pipe and the HDPE is also a good choice for underground installations. Look for KWH, Weholite, Polypipe, Rinker, Performance Pipe, Kanalrohrsysteme, and others for polyethylene piping systems. Diameter to 750 mm and larger are available. You might consider some of the plastic / lined valves for these temperatures. Many DI water systems use polypropylene lined steel piping around the resin beds. I would avoid the PVC plastic piping due to brittle material properties at the lower temperatures. If the pressures and temperatures are increased, then the need for duplex stainlesses will need to be evaluated.
RE: SS for this water?
The HDPE pipe is a good option, for above ground high pressure application also consider HDPE lined Steel too. PIHA is a good manufacturer who has got around the problems of the HDPE liner "walking" out of the steel liner due to thermal expansion.
Mark Hutton
RE: SS for this water?
RE: SS for this water?
RE: SS for this water?
2205 would work for a while.
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Plymouth Tube
RE: SS for this water?
Prices for super duplex materials are very competitive if you buy in quantity. there is spare capacity at the mills.
Be advised that it is not only the materials but the welding and post treatment that will be needed to mee these corrosive conditions. (refer ASTM A380)
RE: SS for this water?
Now We're examine such variant 1.4410 or 1.4462.
Concentration of hypoclorit (NaOCl) 1 ppm in our water.
What abou this choice?
RE: SS for this water?
Admit defeat and look at 25Cr super-duplex grades.
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Plymouth Tube
RE: SS for this water?
Read Section 1.2 of the report.
http://ww
RE: SS for this water?
Interesting report, though quite high level. I am currently involved in the Adelaide Desalinatin Plant, so it is particularly relevant.
Mark Hutton
RE: SS for this water?
I was responsible for the Durability Plan for Adelaide Desal. Back in Sydney now. Must talk sometime.
What organisation are you with?
RE: SS for this water?
Mark Hutton
RE: SS for this water?
RE: SS for this water?
The most economical alternative would be a 25% Cr duplex. With their high strength you can use less metal. And you will get good service life.
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Plymouth Tube
RE: SS for this water?
What about chinese duplex and superduplex stainless steel (quality/price)?
What chinese brand can you advise?
Has cooperation with chinese producers any specifical moments?
RE: SS for this water?
"It is unwise to pay too much. But it is worse to pay too little. When you pay too much, you lose a little money; that is all. When you pay too little, you sometimes lose everything because the product you bought is incapable of doing what it was bought to do."
"The common law of business prohibits paying a little and getting a lot. It can't be done. If you deal with the lowest bidder, it is well to add something for the risk you run. And if you do that, you would have enough to pay for something better."
"There is hardly anything in this world that someone can't make a little worse and sell a little cheaper-and people who consider price alone are this man's lawful prey."
By John Ruskin 1819-1900