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  1. jskernahan

    "Predict Storage Tank Heat Transfer Precisely" Example Error?

    That was my thinking too quark, just wanted to see if anyone else had come across this. Thanks
  2. jskernahan

    "Predict Storage Tank Heat Transfer Precisely" Example Error?

    Hi All, I'm building a tank heat loss spreadsheet with reference to the article "Predict Storage Tank Heat Transfer Precisely" and have noticed that in the article example they are multiplying the liquid phase Grashof number by 100 and not the vapour phase. I can't figure out why they would do...
  3. jskernahan

    A105 Valves in Low Temp Service - CSA Z662

    Thanks GD2, they are small bore valves so I suspect you're right about the hoop stress justification.
  4. jskernahan

    A105 Valves in Low Temp Service - CSA Z662

    All, I need some help with a CSA Z662 interpretation. Here's the situation: - I have a CSA piping spec that calls for the use of A105 valves in a LVP (oil), low temp (-45 deg C), PN100 (9930 kPag) service. - CSA Z662 table 5.1 states that LVP service is categorized at Cat. 1 with no min...
  5. jskernahan

    Carbon Steel Corrosion from Produced Water

    Great thanks for the help guys. I'll look into beefing up the CA and will round my numbers for future posts :)
  6. jskernahan

    Carbon Steel Corrosion from Produced Water

    Hi all, I'm replacing an old section of produced water pipe and am trying to figure out if I should internally coat the carbon steel (A106-B). I don't have any info an the existing pipe so can't use that as a benchmark, however I have a water analysis that shows a chloride content of 13,896...
  7. jskernahan

    8" and Larger Globe Valve Not Allowed in Spec

    Awesome, thanks guys
  8. jskernahan

    8" and Larger Globe Valve Not Allowed in Spec

    Hi All, I have a piping spec that does not allow 8" or larger globe valves and insists on a v-ball or gate valves as an alternative. I'm not sure the reason for this and am wondering if anyone has any insight? Below are the spec conditions: Flange rating: 600# (max pressure: 10,210 kPag @ 38...
  9. jskernahan

    CSA gr. 359 flanges in lieu of ASME A350 Flanges

    Hi Guys, Does anyone know if you can use CSA gr. 359 flanges in lieu of ASME A350 Flanges in a B31.3 piping system? I'm not sure if B31.3 will recognize the gr. 359 material. Thanks, James
  10. jskernahan

    Beric Valves

    I haven't had much luck at all! But I have decided to go ahead and use the valves. Apparently Exxon has these valves in service and the they are manufactured to the specifications needed for my application. Delivery time was the reason I was considering using them so I was on a short time frame...
  11. jskernahan

    Trim 8 in lieu of trim 12

    Thanks for the input guys. Here was the resolution: I tried to get a spec waiver approved for trim 8, with my justification being that trim 8 is certified under NACE if the PH is greater than 3.5 and the process fluid is produced vapour at a temp above 60 deg C with chlorides present (trim 8...
  12. jskernahan

    Beric Valves

    Has anyone had any experience with Beric Valves? www.bericvalves.com
  13. jskernahan

    Trim 8 in lieu of trim 12

    OK, thanks for the input guys.
  14. jskernahan

    Trim 8 in lieu of trim 12

    Ok thanks hsbcn! Yes I've seen the trim chart, I just don't know much about metallurgy so didn't know if 410 could be used in lieu of 316. From what you're saying it seems like 316 is the better choice but 410 can be used, correct? The specs I'm using calls for 316 but my valve vendor only has...
  15. jskernahan

    Trim 8 in lieu of trim 12

    Hi there, I'm wondering if trim 8 can be used in lieu of trim 12 for an A105-N check valve in a sour hydrocarbon service with a design temp of 294 deg C and pressure of 7832 kPA. From what I've read the only difference seems to be trim 8 uses 410SS, while trim 12 uses 316SS Thanks

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