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  • Users: bayardwv
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  1. bayardwv

    30" Swage/Transition Nozzle & Nozzle Reinforcement?

    Several questions below, Has anyone ever designed or fabricated a 30" Swage/Transition Nozzle? I've been directed to determine the minimum Vessel ID needed to attached a 30" 600# flange using a Swage/Transition Nozzle. I can narrow that down to 38" ID min., because that's needed to meet other...
  2. bayardwv

    WASHER MATERIAL

    What is the best way to determine what specification/s a washer needs to adhere to on an ASME Section VIII, Div.1 pressure vessel? Is there anywhere in Section VIII, Div.1 stating carbon steel washers SHALL be made from material listed in Table UCS-23 or Section II materials? The washer isn't...
  3. bayardwv

    SECT. VIII, DIV.1, APPENDIX 2, ROLLED RING HUBLESS, FIG. 2-4 SKETCH (8)

    I have a question regarding whether or not a Flanges made from 3/4" Plate rolled into a Ring, used in a design rated for 500 PSI @ 200°F can be designed as a LOOSE Flange. Years ago we were directed to design all flanges used on designs with pressures greater than 300 PSI as an Optional...
  4. bayardwv

    Mandatory Appendix-2-3 "G" value for O-Ring seal ?

    When designing a flange with an O-Ring seal, which is 31" OD x 30.45" ID with a 0.275" C/S, should the "G" value be determined as stated in 2-3, or, should the "G" value = the OD of the O-Ring as noted in 2-5(c)(2). Example: If using the 2-3 definition of G, and assuming that "N" from table...
  5. bayardwv

    Parallel Tangential nozzles through the knuckle

    I'm looking for help with finding the proper way to calculate reinforcement for (2) 12" tangential nozzles that are going thru the knuckle of a 48" Ellip Head, into the shell & thru the head to shell seam, and are parallel to each other. One of the nozzles is set on and the other will project...
  6. bayardwv

    Hollow Pipe Plugs

    We have a vendor asking if we'll accept pipe plugs that are solid up until the threads but hollow where the threads are. I looked at ASME B16.11 and it appears hollow plugs are not addressed. Has anyone accepted these types of plugs and if so what justification was used to qualify them to...
  7. bayardwv

    U-Stamped vessel requires Replacement Cover Assembly,

    Our Customer has requested a replacement cover for an ASME Section VIII Div.1 U-Stamped pressure vessel., supplied by our company. The cover is a blind flange designed in accordance with App.2. Welded to the cover are 2 lift lugs and a vent coupling. I believe the cover assembly needs to be...
  8. bayardwv

    Loose vs Option/Integral flange requirements per Appendix 2, 2-4 (3) ?

    I have an old internal design memo stating that for vessels over 300 PSIG the flange has to be calculated as an INTERGRAL flange in accordance with App.2, 2-4(3). I question the accuracy of this because ASME B16.5 Slip-On style flanges are rated greater than 300 PSIG yet are still attached...
  9. bayardwv

    Welded Clamp Ferrules on Code stamped vessels and CRN

    #1. Which section of ASME Section VIII Division 1,U-1 addresses the SCOPE of commercially available Tri-Clamp fittings butt-welded to a pipe extension on a Code stamped vessel? (NOTE: Fitting is attached in accordance with VIII, Div.1 requirements) Not Included: U-1(c)(2)(-e) & U-1(e)(1)(-a)...
  10. bayardwv

    Weld Repair and "E" value used in Head Calc

    A small nozzle hole was incorrectly placed and repaired by using the material drop from the correct hole as the plug for the incorrectly located opening, and the weld was LP tested. If the calculations were originally performed using a seamless ellip head with "E" value noted below...
  11. bayardwv

    When calculating the Moment Bending

    When calculating the Moment Bending Stress on a Pin, should the allow stress for a pin made from SA193B7 be taken from Sect.II-D, Table 3 or can a less conservative, larger percentage of the Max. Yield Strength be used? Attached is a basic sketch of the closure bolting design...
  12. bayardwv

    EN 10204 3.1 for GX2CrNiMo 19-11-2 DIN 17445 14409

    I'VE BEEN TOLD THAT A 3.1 MATERIAL CERTIFICATE DOES NOT HAVE TO INCLUDE PHYSICAL AND MECHANICAL PROPERTIES. CAN SOMEONE PLEASE TELL ME WHERE I CAN FIND WHAT HAS TO APPEAR ON A MATERIAL CERT FOR A CAST PART WITH A MATERIAL SPEC CALLED OUT AS EN 10204 3.1 for GX2CrNiMo 19-11-2 DIN 17445 14409?
  13. bayardwv

    UG-101(m) Su E vs. Su avg vs. Su r

    Here's my scenario....I have a SMALL (less than 4" dia) NON-Code Pressure Vessel that needs to have it's CRN renewed. Quebec has told me we have to do a new proof test and I've never done this before. The previous Proof test was performed by an outside manufacturing company and the documents...
  14. bayardwv

    PV ELITE Separator Plate/ Tubesheet design

    We fabricate pressure vessels that are used with proprietary internal parts used for filtration. The separator plate welded inside of the shell has openings that except our filtration elements. The only pressure the separator plate is subjected to is Differential pressure between the Dirty and...
  15. bayardwv

    Tubesheet/Separator Plate with nozzle

    We fabricate pressure vessels that are used with proprietary internal parts used for filtration. These often use a separator plate sandwiched between 2 body flanges. This plate has openings that filtration elements are connected to and the only pressure the separator plate is subjected to is...
  16. bayardwv

    PVELITE : CPLG LOCATED ON HEAD STRAIGHT FLANGE?

    Can anyone suggest how I get PVELITE 2014 to let me add a coupling on the straight flange portion of an F&D head?
  17. bayardwv

    Small Hole in ASME B16.5 Blind Flange

    I am using an 8" 150# ASME B16.5 Blind flange with a 1/2" NPT connection drilled & tapped directly into the flange 3" off center. I am being told the Flange is no longer an ASME Flange and that calculations are required. I disagree for several reasons, 1.) The Flat head formulas in UG-34 don't...
  18. bayardwv

    Appendix 2 Flange Made from Rolled Ring w/ Butt Joint ?

    Has anyone been asked to modify the Appendix 2 thickness calc because of a welded ring. Here's my situation.... We use Loose type Flanges designed in accordance with ASME Sect. VIII Div.1, 2013 Appendix 2, fabricated from a rolled and welded ring using the lower stress values per Note G5 in...
  19. bayardwv

    ASME VIII APPENDIX 24 ?

    Has anyone had any success at finding/creating a spread sheet to calculate a Clamp & Hub(ferrule) using ASME VIII Appendix 24? This isn't something I'd normally get into but I've been elected to figure it out. The Clamp maunafacturer supplied me with the clamp Calc but I see some...

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