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  1. Shmulik

    Non-Surge closing Check Valve

    Thank you!
  2. 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!
  3. Shmulik

    254 SMO piping material

    Pipe A312 UNS No. S31254 exists in 2016 edition. Please see in Table A-1 / A-1M at 20Cr–18Ni–6Mo Please note that tensile values are not the same for thk. >3⁄16 and ≤3⁄16 Please consider Basic Quality Factor acc. to Table A-1B for the relevant pipe description.
  4. Shmulik

    Recent brittle behavior of carbon steel (A105/A106/A234/A53)

    API 570 - 2016:
  5. Shmulik

    API 570 exam, ASME B 16.5 question

    Please recheck which edition of B16.5 this exam sample refer to. Paragraphs 6.1.1 and 6.1.2 regarded only to Table 9 (Class 150) and 12 (Class 300) flanged fittings. Flanged fittings of class 400 and higher are listed only with Nonmandatory annexes since the edition of 2003
  6. Shmulik

    Hi. What's the name of these branch

    Branch connection fitting 90° Branch Outlets – Socket Welding: MSS SP-97
  7. Shmulik

    Pressure Vessel Head Thickness

    r6155 Material grade designation marking includes the prefix “WP” as it required for standard fittings (B16.9 4.4.1) Pressure rating designation is not applicable for fittings such as caps. There is no rating similarity to ASME B16.5 flanges since it's class designation is a dimensionless...
  8. Shmulik

    Pressure Vessel Head Thickness

    Hi friends, Thanks for your concern. No, nothing is placed on this end cap (the vessel is horizontal). I am very well aware about that any operation on a butt weld fitting outside it's welding end made it been considered as "Unlisted component" and it is no longer accepted under the provision of...
  9. Shmulik

    Pressure Vessel Head Thickness

    Thank you metengr Very well explained!
  10. Shmulik

    Pressure Vessel Head Thickness

    Thanks, metengr Your approach, as well as the other posts here, is B16.9's required minimum wall thickness is for entire fitting surface. How may you refer to the phrase: "minimum dimensional requirements" in Interpretation 1-4 (quoted above)? Should it exclude wall thickness? Namely: does a...
  11. Shmulik

    Pressure Vessel Head Thickness

    This is the point of the question: Pressure temperature rating for B16.9 fittings shall be calculated. So, where shall we measure fitting's thickness? From the following interpretation of ASME B16.9 it seems that thickness shall be measured at welding end: Interpretation 1-4: Subject: B16.9...
  12. 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...
  13. Shmulik

    how to recognize pipe & tube?

    It seems you probably have a pipe there. Its coming into the bore of a Slip-On flange. Standard flanges (ASME B16.5) are made acc. to nominal pipe sizes. You may simply measure the outside diameter (do it on a straight section). The OD for NPS 1/2" is 0.84" (21.336 mm) regardless to the sch...
  14. Shmulik

    what is the diffrence between material SA-516-GRADE 60 AND GRADE 70

    thanks weldstan
  15. Shmulik

    what is the diffrence between material SA-516-GRADE 60 AND GRADE 70

    SA-516 Gr. 60 has better Charpy impact toughness properties at low temperature.
  16. Shmulik

    PWHT chart,

    nkvon, There is no code requirement anywhere for separated record sheet for each thermocouple. Very simple, the client is honorable man and he carefully tries not to express his suspicion that you cheat him. Since you have several thermocouples located at separated places, it is expected that...
  17. Shmulik

    Charpy Question

    ASME IX ; QW-401.3 "When a procedure has been previously qualified to satisfy all requirements other than notch toughness, it is then necessary only to prepare an additional test coupon using the same procedure with the same essential variables, but additionally with all of the required...
  18. Shmulik

    Hydrotest of 3000# fitting

    Hi, ASME B31.3 (Process Piping) requires a test pressure of not less than 1.5 times the design pressure (for hydrostatic test). Additional important consideration is the allowable stress ratio I've mentioned at no. 2 above. Please see ASME B31.3 ; 345.4.2(b) If the design temperature is high -...
  19. Shmulik

    Hydrotest of 3000# fitting

    A forged fitting is rated according to ASME B16.11 (Forged Fittings, Socket-Welding and Threaded), while ASME B16.34 is a standard for valves (Valves – Flanged, Threaded, and Welding End). You are not able to test a Socket Weld fitting when it stands on its own. You may do it only when it is a...
  20. Shmulik

    Flange 4" 150 RF Blind c/w 2" NPT Center Tap A105 N

    Friends, the description in the question is misleading. Making 2" NPT thread on 4" Blind flange is prohibited by ASME B16.5 (regardless to flange class) Please see in Table 6 for reducing flanges, at columns 3+4: the smallest size of reducing outlet requiring Hub Flange for NPS 4" is 1.1/2" As...

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