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  • Users: SNORGY
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  1. SNORGY

    CAESAR II Licensing Options

    Sorry all, it’s been a long time since I e been to this site. My question is simple, I’m not looking for pricing information or anything. I am just asking here if COADE still has an option for a limited run license, or are they all time lease options? I might need to do the odd “one off”...
  2. SNORGY

    Credible overpressure scenario TEG reboiler

    Hello all. I have always thought it prudent to look at fire case PSV sizing on TEG Dehydrator packages, specifically on the regenerator. I have encountered an instance in which it is being proposed to not consider this case. The issue at hand is the question of whether or not anything other...
  3. SNORGY

    Looking for ASME II Part D 1995 S values SA106-B

    I am just checking a Code calculation for tubes in a Section I boiler. The S values from 500 F to 800 F would be useful; I do have the 2010 Code values. Many thanks in advance... Who is right doesn't matter. What is right is all that matters.
  4. SNORGY

    ASME B16.11 9000# fittings

    Hi all. Is there such a thing as a published pressure versus temperature rating table for 9000# ASME B16.11 fittings and, if so, where can I find it? Many thanks in advance... Who is right doesn't matter. What is right is all that matters.
  5. SNORGY

    Estimate rate of reverse flow through centrifugal pump when it has stopped

    Hi folks. Is there an accepted methodology to estimate the reverse flow through a centrifugal pump assuming the discharge check valve has failed simultaneously with the pump not in operation? I have a situation where I am being asked to size a relief valve on the suction side piping on the...
  6. SNORGY

    Transient analysis S+T heat exchanger to evaluate rupture disks vs PSVs for tube rupture

    A colleague and I have an opportunity to undertake a study to evaluate the transient pressure rise in S+T heat exchangers due to guillotine tube rupture. These units are liquid-liquid, not liquid-gas. We are not in possession of CFD software like AFT Impulse, and I am of the opinion that we...
  7. SNORGY

    MathCad

    I have observed that a number of folks in these fora make reference to, or frequently use, MathCad. This summer, I mentored a university student who is proficient in its use and who advised me that engineering students these days are all issued a graduation-date limited but full featured...
  8. SNORGY

    5% vs 10% radiography of butt welds in normal service

    ASME B31.3 calls for 5% of all butt welds in a lot to be radiographed for 100% of their lengths. However, common industry practice - for decades - appears to have been 10%. Does anyone know what started that and why?
  9. SNORGY

    MAWP of vessel vs flange rating

    A vessel has been specified with MAWP = 740 psig. This is coincident with a 300# ANSI flange rating of A-105-N below 38 C. Vessel fabricator states that the vessel (horizontal, 1829 mm OD) cannot be registered with MAWP = 740 psig because, if liquid is in the vessel, the flanges at the bottom...
  10. SNORGY

    mating pipe of slightly different wall thicknesses and its effect on In Line Inspection tools

    Hi folks. Quick one here... Have a 16" Sch 30 riser (9.53 mm W.T.), and it is proposed to use SCH 40 (12.7 mm W.T.) for a 5 meter straight length of pipe between riser and pig barrel. P/L riser designer states that ILI will be impossible, irrespective of how the transition weld is beveled or...
  11. SNORGY

    Pipe shoe / anchor / guide detail allowable forces and moments

    Hi folks, just a quick one here. I am tasked with (actually tasking myself with) writing an in-house set of standards for shoes, anchors and guides for both welded and non-welded (clamped-onto-pipe) pipe supports. What I want to develop is a table that lists the detail number and pipe size on...
  12. SNORGY

    Small volume of propane released suddenly into flare

    I am looking at a propane condenser (air cooler) with a relief valve discharging to a flare system. I interpret API-521 to suggest that, with free drainage to the accumulator, I do not need to size for fire based on bundle bare tube area; in fact, I don't need to put the relief valve in at all...
  13. SNORGY

    The future of handheld scientific and graphing calculators (or pen + paper, for that matter)

    I had a few days off over the holidays, so passing the time in front of NFL football and World Junior hockey on TV (-25 C outside...), I started transferring iPad apps onto my new iPad Air. While doing this, I decided to search for new apps that emulate graphing calculators. I now have four...
  14. SNORGY

    Is there an error in NFPA 58 calculation of equivalent SCFM of air regarding PSV relieving rate?

    The equation that I see, based on an earlier version of the pamphlet, is: SCFM (air) = (3.09)(W)[(ZT)/(M)]^0.5 where SCFM (air) is equivalent air flow W is relieving capacity of product vapor at relieving conditions in lb/hr Z is compressibility factor of product vapor at relieving conditions...
  15. SNORGY

    Pump data sheet specified "pressure" versus "head" and confusion ensued

    I just want to make sure I am not missing something. A pump data sheet for a PD pump specified three operating conditions: low flow, normal flow and rated flow, with suction and discharge PRESSURES expected for each. The PD pump was long lead, so a very well known vendor quoted a centrifugal...
  16. SNORGY

    Required / suggested NDE for in-service compressor suction separator and stage 1 suction bottle

    Client has an existing compressor proposed to be relocated from Site A to Site B (Alberta, Canada). To achieve suitability in the new service, the nameplate pressure needs to be increased from about 4520 kPag @ 149 C to 4960 kPag @ 55 C. An in-service inspection is planned prior to relocation...
  17. SNORGY

    Blocked in line heater coil

    Hi all... I have an indirect fired line heater with a 50/50 EG/Water bath maintained at 90 C. Gas enters the line heater preheat (first pass) coil at a known wellhead pressure, temperature and flow rate. Under a certain condition, the wellhead ESDV and the angle choke on the coil outlet close...
  18. SNORGY

    NSF-61 certified expansion joint or hose for tank nozzle

    Hello folks. I have an AWWA potable water tank on a gravel pad. Design consolidated settlement is in excess of 1.5 inches. The piping is not particularly flexible, so I need an expansion joint between the tank and the closest pipe support. Can anyone suggest suppliers from whom I might...
  19. SNORGY

    CAESAR II (Latest) API-650 Nozzle Loads

    After I have modeled through the tank to the tank node and then identified the associated nozzle(s) node between which the API-650 stiffnesses are to be inserted... The preprocessor (error checker) computes the stiffnesses etc. and then I run the static analysis. My questions are simply this...
  20. SNORGY

    Allowable stress values for API 5LX Grade (xx) pipe above 400 F?

    I have searched past threads on this topic, but my situation is as follows. It is proposed to use CSA Z662 Clause 14 to design some steam distribution pipelines (Canada). Clause 14 directs the designer to ASME B31.3, in which some "Funk & Wagnalls" mental gyrations leads the designer to...

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