Material of Construction (500ppm Chlorides)
Material of Construction (500ppm Chlorides)
(OP)
I am looking for some direction on the material of construction for pumping a fluid with 500ppm chlorides. (45-50 GPM). I do not have a temperature, which affects the considerations. Is there any reference material anyone can direct me towards? I am pretty sure that 316SS is not the correct choice for longevity. Any ideas are welcome. Thanks.





RE: Material of Construction (500ppm Chlorides)
RE: Material of Construction (500ppm Chlorides)
RE: Material of Construction (500ppm Chlorides)
1. Past operating experience in the same or similiar service per client's Rotating Equipment Engineer.
2. Chapter 5, Pump Handbook, Third Edition, McGraw-Hill
3. Chapter TECH-B, Goulds Pump Manual, 8th Edition
4. Corrosion Data Survey, 6th Edition, NACE International
5. Various publications (usually available free) from International Nickel(INCO), Haynes International and The Nickel Institute.
Velocity in the impeller vanes can promote erosion-corrosion where passivating layer is mechanically eroded from base metal, promoting rapid corrosion.
Free chlorine is a consideration in handling sodium hypochlorides where you will need titanium.
For non-acidic applications, you may be able to use copper based alloys such as bronze or Monel.
You should not use austentic stainless steels such as the 300 series or Alloy 20 above 140 oF as they will crack.
FRP, PVDF, PTFE, Alloy 2205, Nickel 200, Hasteloy, Inconel and Titanium all have application niches for chloride service.
API S-6 (400 series ferritic stainless steels) and Alloy 2205 (duplex stainless steels) are a good starting point and not subject to the cracking of 300 series SS.
Post this question also in the Metal and Metallurgy Engineering Forum.
RE: Material of Construction (500ppm Chlorides)
RE: Material of Construction (500ppm Chlorides)
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdoweb/
RE: Material of Construction (500ppm Chlorides)
RE: Material of Construction (500ppm Chlorides)
What about Cu alloys? The Al and NiAl bronze grades would probably be good options for this.
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Plymouth Tube
RE: Material of Construction (500ppm Chlorides)
Johnny Pellin
RE: Material of Construction (500ppm Chlorides)
Adam Nemastil