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  • Users: Shmulik
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  1. Shmulik

    Non-Surge closing Check Valve

    I'm looking for a non-surge closing check valve for fuel service / petroleum industries. NPS 6" flanged #150 May you please link a reliable supplier / manufacturer? Thank you!
  2. Shmulik

    Pressure Vessel Head Thickness

    Hi all, Head of a pressure vessel made of ASME B16.9 Cap, NPS: 24" ; Nominal W.T: XS (12.7 mm) ; Material: SA-234 WPB Design wall thickness calculated acc. to the requirements of ASME VIII-1 / UG-44 is: 10.75 mm Actual wall thickness measured on cap: 12.4 mm at welding end ; 9.6 mm (min) at...
  3. Shmulik

    SA-193 Gr. B7 Retightening

    Hello all. Is there any code (or other) restriction for bolting material SA-193 Gr. B7 Retightening?
  4. Shmulik

    Opening in Bolted Flat Cover

    Hi all, In order to design Opening and required reinforcement in Bolted Flat Cover, Figure UG-34 (j) or (k): finding the required cover thickness per UG-34 using Eq. (2) or Eq. (5), the thickness shall be calculated for both operating conditions and gasket seating, and the greater of the two...
  5. Shmulik

    Flange Overstressed during Hydrotest

    Hi, I'm dealing with a flange connection that exposed to piping system hydrostatic test pressure preformed exceeding the allowable by ASME B16.5 (2.6). Flanges: Class 150 WN.RF. Material: SA-105N. Gasket: Spiral-wound metal, with nonmetallic filler (group Ib). Bolts & Nuts: SA-193 B7 / SA-194...
  6. Shmulik

    SA/EN 10028-2 P235GH MAX. ALLOWABLE STRESS VALUE

    I'm not able to find this material's Max. Allowable Stress value at Section II Part D – Table 1A. Is it possible that P235GH is not listed in Section II Part D even though it appears in VIII-1 / TABLE UCS-23 ? Thanks in advance.
  7. Shmulik

    Opening on Ellipsoidal Head

    I'm trying to understand the intent of UG-37(a) requirement for tr: " tr = required thickness of a seamless shell based on the circumferential stress, or of a formed head, computed by the rules of this Division for the designated pressure, using E = 1, except that… " What E value shall be...
  8. Shmulik

    Clamp Screws DIN 28152 in ASME VIII-1 Vessel?

    Is there an acceptable procedure enable use of clamp screws for quick-opening flange in ASME VIII-1 vessel? http://www.vba-edelmann.com/english/images/pdf/vba-edelmann-clamp-fasteners.pdf
  9. Shmulik

    Cast-Iron Hot Water Boilers

    Kindly, which European standards are applicable for the design and manufacture of Cast-Iron Hot Water Boilers?Thank you!
  10. Shmulik

    Cast-Iron Hot Water Boilers

    Kindly, which European standards are applicable for the design and manufacture of Cast-Iron Hot Water Boilers? Thank you!
  11. Shmulik

    Vacuum Tank with Half-Pipe Jacket

    For a vacuum tank with external half-pipe jacket: Can I credit the moment of inertia that comes from external spiral half-pipe jacket instead of adding stiffening rings on a cylindrical shell section (for UG-29)?
  12. Shmulik

    Ellipsoidal Head Acceptable Approximation

    UG-32(d) defines Acceptable Approximation for 2:1 ellips. head as one with knuckle radius of 0.17D and a spherical radius of 0.9D. Kindly, my question is: may a head still be considered 2:1 ellipsoidal where knuckle rad. > 0.17D and/or spherical rad. < 0.9D ? Can we have any answer for it from...
  13. Shmulik

    Branch on B16.9 Fitting?

    ASME B31.3 basically considers a branch as it welded on a run-PIPE. ASME B31.3 and ASME B16.9 consider a fitting as a seamless pipe. My question is: when a branch is welded on a B16.9 Fitting (elbow / reducer / tee / cap) – has this fitting been considered as "Unlisted component" acc. to...
  14. Shmulik

    UG-45 minimum nozzle thickness

    For what stand-out length of nozzle does this requirement apply? For what outer length a nozzle is still been defined as a nozzle? Does this length limited to the UG-37 Limit of Reinforcement (2.5t or 2.5 tn+te)? How about threaded or Victaulic connections? Are these types permitted when...
  15. Shmulik

    B.Sc. / M.Sc. grade - USA

    Hi all, I would appreciate whether someone may direct me how could I get access to the proper US federal authority in order to check out about academic technical institutes and whether they permitted to provide B.Sc. / M.Sc. grade. I'm not US citizen, trying to dig some info for a friend that...
  16. Shmulik

    Flue gases flow in fire-tube steam boiler

    I'm looking for a good and reliable source (books, website, etc.) which I can learn from the foundations of flue gases flow + heat transfer in low-pressure fire-tube steam boiler. I would greatly appreciate any help or guidance.
  17. Shmulik

    Openings in Pressure Vessels UG-36

    May anyone explain the philosophy of paragraph VIII-1 / UG-36 (c)(3)(a) ?
  18. Shmulik

    Low Temp. Joint Type

    Acc. to UW-2 (b) Low Temp. Welds using metal backing strips which remain in place are not permitted. My question is, what is the reason for that? Is that refer to MDMT colder than –55 ºF or –20 ºF ?
  19. Shmulik

    PV Nozzle of SA-479 ?

    Does VIII–1 restricts apply of nozzle made of SA-479 (316L on shell of SA-240 316L) ? Many thanks in advance.
  20. Shmulik

    Chemical Resistance of Perspex

    Hi all, I'm looking for chemical resistance information for Perspex. Working condition I have to inquire is for water and NaOH 5% at temperature up to 60 °C Thank you very much on advance.

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