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  • Users: Cobra17
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  1. Cobra17

    PCC-2: Insert Plate With A Nozzle

    Can someone confirm/correct me if I have the following wrong: I'm using PCC-2, 2022 Edition for reference. I have a circular insert plate that will have a NPS 10 nozzle in it, the vessel is designed to VIII-1. The insert plate is located on the shell (0.375" thick) and will not be close to any...
  2. Cobra17

    VIII-1, Applying nozzle thrust

    I'm working on a project with an end user requirement to include nozzle thrust. I've talked to a few other people and no one has seen a request like this, or is sure how to do it. As usual, the end user might as well be the Riddler (from Batman). Hopefully someone here is able to help with...
  3. Cobra17

    VIII-1 Table UW-16.1

    I have a manufactures standard fitting that is attached with a single fillet weld from the outside and meets all the requirements of UW-16(f)(3)(-a) NPS = 3/4" (ID of 1.05") OD = 1.438" Wall = 0.194" the fitting passes internal pressure requirements, weld sizes, etc.. but fails UG-44...
  4. Cobra17

    NBC-2015, hn & hx

    In NBC-2015, when calculating hn and hx to be used for Ax (height factor), if I have a piece of equipment sitting on the ground outside, only elevated by a skirt, hx and hn are 0, or is hx (elevation on structure) the skirt length, and hn (structure overall height) is the ground to the top of...
  5. Cobra17

    Flange Factors (VIII-1, App. 2)

    Just curious if anyone knows if there is a source that has Figures 2-7.2 , 2-7.3, 2-7.4, 2-7.5, 2-7.6 in table format? I use the long equations in excel, but I'd like to use lookups to reduce space
  6. Cobra17

    Neutral Axis & Inertia

    I'm hoping someone can help me determine the neutral axis and Inertia lx-x of a rolled plate (OD = 30"), but only for a specific angle (42.20981°). the chord length is 10.6673" at an angel of 42.20981°. I've attached a sketch to make it more clear (I...
  7. Cobra17

    Appendix 13, 13-14 External Pressure

    I'm making some spreadsheets to do figure 13-2(a), sketch 1. I used the PTB-4 example to do the internal pressure calculations but now I'd like to add the external pressure calculations as well. 13-14(a), no issues, but for 13-14(b), is there a formula for figure 13-14(a), or a chart of the...
  8. Cobra17

    B31.3 Stress ratio per 323.2.2(b)(1)

    I'm trying to calculate the stress ratio per 323.2.2(b)(1) to determine the MDMT reduction in figure 323.2.2B. per B31.3 (1) circumferential pressure stress for the condition under consideration (based on minimum pipe wall thickness less allowances) divided by the basic allowable stress at the...
  9. Cobra17

    UCS-67

    I have a vessel with 1.75" thick heads and shell made out of SA-516 70N. The material is impact test exempt (MDMT = -20°F) per fig. UCS-66.1. All the nozzles are HB or LWN made out of SA-350 LF2 Cl.1. 'Everyone' is telling me they always do production impact testing above 1.375" thick material...
  10. Cobra17

    Skirt With 'Seismic Clips'

    I'm looking for a valid way to verify 'Seismic Clip'. The clips are pieces of angle welded to a skirt and bolted to the ground. The skirt on it's own is enough for seismic conditions and I'm thinking that if I do procedure 4-15 from the 4th edition of the Pressure Vessel Design Manual (Moss)...
  11. Cobra17

    Reverse Loose Flange With Full Face Gasket

    How do you handle reverse loose flanges with full face gaskets? I have Compress and it can't do them, but because loose flanges don't take into consideration any of the shell/nozzle or connection, using the Taylor Forger method for a full face loose flange should be the same as a reverse loose...
  12. Cobra17

    API-650: EC.9.4.6

    I'm going through the example problems in API-650 - 2020 edition and for EC.9.4.6, I can't figure out how they go from Xc=23.0 ft to 8,795,200 ft-lb... or Xr for that matter. I get that they are using Ac (convective spectral acceleration parameter), but how does 23ft become 162,874,400? Xc *...
  13. Cobra17

    Figure UCS-66.1

    Is there a formula or somewhere that has table values for the MDMT reduction curve of Figure UCS-66.1?
  14. Cobra17

    Record set looping

    I'm trying to loop through a table records and fields. The field loops work fine, but I can't get it to move down to the next "tbl" record.. i'm using 3 record sets all based on the same table tbl = the set I want to loop through rst1 = loops through table field names and compares against rst2...
  15. Cobra17

    Moving to a specific tab stop

    I'm grabbing some information from an access table and putting it into word and I'm trying to do the following: 1. Move to tabstop 2 2. insert a string, "Components" in this case 3. move to tabstop 6 4. insert a string, "Material" in this case the issue is that "Components" varies in length...
  16. Cobra17

    Access to Word - Naming Sections For Use

    is there a way to add a "description" to a section in VBA so that I can reference it when coding? so if I insert a new section I don't have to adjust all my section call outs currently I'm creating a section from Access VBA to Word like so: wd.Selection.InsertAfter Text:=vbTab & "TAG...
  17. Cobra17

    II-D 1995 Edition

    I'm working on an older vessel that was fabricated from P355NL1 material. I know in the 2019 Edition they removed P355GH, but was P355NL1 ever in II-D, specifically the 1995 Edition.. or if the stress tables were in VIII-1, was it there?
  18. Cobra17

    VIII-1: App. 2, Figure 2-4(4b)

    I'm looking to verify the weld in ASME VIII-1 Appendix 2, Figure 2-4(4b). I remember in older code books, I HAD a 1986 book, that the upper flange weld leg was dimensioned as 'c' and the lower weld (outside of pipe) was as it's currently shown, min. = 0.7c. Looking at Figure (3) & (3a) they...
  19. Cobra17

    Appendix 2 Flange Factors (F, V, f)

    Hey, long time viewer as a guest but I've run into something I need a little help with. I'm trying to do appendix 2 integral flange calculations in excel and I want the long formulas found in Table 2-7.1. I've got them all there and checked, double checked, checked by 2 other people... but I...

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