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  • Users: chris456s
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  1. chris456s

    Bolt checks

    Regarding bolt calcs in EN 1993-1-8 Is the bolt tensile load F_t,Ed equal to total tensile load including preload or is it only applied load external to preload? The question arises for the following reasons: 1. Notice the tensile resistance check F_t,Ed <= F_t,Rd. Where resistance is...
  2. chris456s

    Bolts F_t

    Regarding bolt calcs in EN 1993-1-8 Is the bolt tensile load F_t,Ed equal to total tensile load including preload or is it only applied load external to preload? The question arises for the following reasons: 1. Notice the tensile resistance check F_t,Ed <= F_t,Rd. Where resistance is...
  3. chris456s

    ASME BPVC Viii.2 4.4.12.2

    In the 2019 ASME BPVC Viii.2,section 4.4.12.2(e) gives allowable compressive stress under axial compressive stress and Hoop Compression. Subsection (e)-1 discusses Fxha for lamda <= 0.15. But subsection (e)-3 also discusses Fxha for lamda <= 0.15. Which one is correct? They seem to condradict.
  4. chris456s

    Vessel Classes

    I only have access to BPVC 2019 and 2015 BPVC.III.2-Annex 3-A 2019 says, for carbon steel in class 1 vessels allowable stresses comes from Sec II, Part D Table 2a and table 5A for class 2 vessels. While 2015 Annex 3-A makes no class distinction and says carbon steel allowable stress comes from...
  5. chris456s

    Y Stress factor without a hub

    In BPVC VIII.2- Section 4.16 Stress listed on Table 4.16.8 for "loose-type flange without a hub" includes a "Y" stress factor. Stress factors for all other types of flanges are listed on tables 4.16.4 and 4.16.5. However, neither of these tables list "loose-type without a hub". Where is the calc...
  6. chris456s

    ASME MAterials

    Notice how VIII.1 referes to BPVC II Table 1A for Allowable Stresses but BPVC VIII.2 refer to BPVC II table 5A. Many materials (like A-53 and P235) are listed in table 1A but not on Table 5A or on BPVC VIII.2 table 3-A.1....So, A-53 and P235 are suitable materials if you use methods in VIII.1...
  7. chris456s

    ASME Materials

    I have been reading posts regarding an issue I commonly encounter. How to use API-5L pipe or ASTM A694 flanges with ASME codes when ASME VIII and II does not list them? Often the answer is that the ASME just doesn't cover these materials and you can use unlisted stuff provided huge list of...
  8. chris456s

    Friction in Caesar

    I am reviewing report with references to analysis done in Caesar. Friction is involved and I am not sure if the author has applied friction correctly My question is simple but I'm not finding a straight answer in the Caesar help text Imagine a support where: the Y direction is pipe normal...
  9. chris456s

    Gasket Seating Area

    Two questions relating bolt load in the gasket seating condition to pretension. 1) Notice in ASME PCC-1 App O-1.3 the gasket area is listed as pi/4 (OD^2-ID^2), which makes sense In ASME BPVC VIII.2 and VIII.1 gasket area in load equations is (pi)bG, which also makes sense Both expressions are...
  10. chris456s

    Autopipe Review

    I have been tasked with reviewing a subcon's autopipe results related to a subsea pipe line I have never used autopipe While reviewing the input files, I found some confusing inputs and cannot get a straight answer. Hoping someone here can clarify Each node in the input file seems to have a...
  11. chris456s

    ASME Sec VIII Pt2 Stress

    In BPVC Sec VIII pt 2 paragraph 4.3.10.2, the middle term for stress sigma_sm for spherical shells has a sin squared phi in the denominator. Phi is listed as a spherical location in the Nomenclature section. So for infinitesimal values of phi, the stress on externally loaded spherical shell...
  12. chris456s

    STAAD Pro Report

    I'm using STAAD PRo V8i (Select Series 4) I have a frame structure made of tubular members with an API code check The API code check assesses the tubulars to API RP 2A section 3 and assesses joints to API RP 2A Section 4 The results of both the Section 3 and Section 4 checks are presented in...
  13. chris456s

    Wave loads

    Is there a way to assign more than 4 wave conditions? My wave loads page seems to be limited to 4.
  14. chris456s

    Flange lengths

    I found my mistake...cant seem to delete this post..
  15. chris456s

    Custom Report Templates

    I have a some results. I want to change a column width in the default template. So I hit edit report template. In the editor I change the width on the correct field. The preview looks good so I save the template with a new name and close. But when I try to generate the same report again, the...
  16. chris456s

    Wave direction and Axial Loads

    Again. I'm new to Ceasar I was very surprised to see the way that Ceasar defines wave/current direction. The cosines method it uses is different than any of the codes or other software I use. It is not how ANSYS, ORCAFLEX or Ariane8 defines direction. But fine...every software is different...
  17. chris456s

    Restraints

    I have a long bend. Not a standard elbow, but a 3000mm radius curved pipe I need to put a pipe support on the curve. When a try to beak the element at the correct location for the support, the resulting elements are wrong. One element becomes straight and the curved other element becomes...
  18. chris456s

    Caesar Flange Checks

    New to Caesar I can't get my flange checks to work Always showing allowable pressure as zero 1) does the software treat a flange pair differently than two adjacent flanges? 2) When I insert a flange pair, the pair element is not on the centre of the scoped node. It takes its entire length from...
  19. chris456s

    Flange length

    I'm new to Caesar II, so please bear with the silly questions. I have just added a 300# flange to a 16" pipe. The flange from Caesar is 149.225mm long. However, ANSI 16.5 shows 144mm as the length of a weld neck flange (without the raised face). Raised faces on 300# flanges are around 1.6mm...
  20. chris456s

    Array Ouput

    I have an Array that I want to output to a txt file When I use *MWRITE it works fines. I get a great text file. Organized just how I like it. However, I want to add headers. A label above each column. So I moved all the data down one row and assigned text strings as column labels to each...

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