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  • Users: clay87
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  1. clay87

    coated fasteners for corrosion resistance

    I am attaching two carbon-steel parts (pump columns) together using flanged connections. The application is underwater in brackish environment (let's say 3600 us/cm). In the past when we've used carbon steel parts in this application, we see some surface corrosion at the location of the B8...
  2. clay87

    Update - Name that corrosion

    Referencing this: thread338-320414 What if I told you the shaft was Monel and not XM19...
  3. clay87

    Cooling Water Dissolved Gasses

    We have a demineralized, low-oxygen cooling water system that has H2 as the cover gas in the surge tank. We have some air or O2 inleakage somewhere in the system that is raising the dissolved O2 in our cooling water (normally less than 3 ppb dissolved O2). In order to reduce the dissolved O2...
  4. clay87

    Coupling Guards

    I had a question about coupling guards so I reviewed OSHA 1910.219(c), 1910.219(i), ASME 15.1, API 610 and some interpretations of these. I now have a worse understanding[banghead]. Is there a good article or position paper that summarizes this for pump end-users? Two specific questions: 1...
  5. clay87

    Vertical Pump Soleplate

    We have an old soleplate that has corroded pretty bad and is out-of-level. Readings show about 0.020" per foot out of level. We don't have time to set a new soleplate or machine the existing one. Has anyone out there every shimmed under a vertical pump discharge head (wet pit pump) to correct...
  6. clay87

    Name that corrosion

    Application: Raw Water Pump Shaft Material: A276 XM19 (Nitronic 50) Fluid: Pond water. Slightly brackish (170 ppm Cl- or 1300 um/cm2). We do inject biocide (i think NaOCl). I can't recall ever seeing this corrosion in this application with the same material. We may have a material issue...
  7. clay87

    pad welding cast iron fits

    Does anyone have a weld procedure for pad welding register fits on cast iron or cast ni-resist pump bowls/casings?
  8. clay87

    PWHT of NiAlBr

    We are in a situation where we would like to relax a requirement (in our equipment specification) for PWHT following any welding on a NiAlBr pump impeller. The weld repair is just for dimensional restoration of an impeller bore. Base metal material is B148 C955. Weld filler is CuNiAl...
  9. clay87

    SCH160S

    To what size specification is Schedule 160 Stainless Steel (316) pipe made? B36.19 (Stainless Steel Pipe) doesn't include Sch 160 but does state:
  10. clay87

    Machining Thermal Spray Coating

    We are having difficulty machining a thermal spray coating buildup. We have never had a problem with this coating but in this application it is flaking off - it appears to be in layers. The coating is aluminum-bronze arc-wire thermal spray (hand-held). We have machined this same coating...
  11. clay87

    Brackish Water

    We currently have vertical pumps circulating brackish raw water for cooling in the plant (50-95degF). Chlorides are about 1000 mg/L and usually two of the three pumps are running. The pump columns and castings are Ni-Resist, some other internals are 300 series stainless. We experience quite a...

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