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Recent content by cycguy

  1. cycguy

    Attachment to pad, or pad around attachment

    Thanks for your responses. Yes a WRC-107 analysis has been done for the edge of lug and edge of pad, with the thicknesses described by code1. The way I see it if the lug has a large load on it, say producing stresses to 3/4 the allowable stresses then I think the lug should be welded to the...
  2. cycguy

    Attachment to pad, or pad around attachment

    The attachment of the lug to shell is still reinforced by the pad which is welded at the junction of the lug to shell. It's common practice. See Moss's, Pressure Vessel Design Manual,3rd edit, page 431, Type 1, showing a pad around the trunnion. In the side elevation you can see the pipe...
  3. cycguy

    Attachment to pad, or pad around attachment

    A client has supplied a design of a 15"H x 12"W temporary support lug welded to a 30"H x 30"W x 1"thk pad to be welded to 3/8" thick support skirt. There is a 14" moment arm on the load. Most times we would weld the lug to the shell, then cut the pad to fit around the lug, and weld the pad to...
  4. cycguy

    1995 vs 2005 NBCC National Building Code of Canada

    We are supplying a replacement in kind vessel which originally was designed to the 95 NBCC (National Building Code of Canada) for wind and seismic. The client requires the vessel be designed to the 2005 NBCC for wind and seismic. The Compress vessel software does not offer the 2005 design. Does...
  5. cycguy

    vacuum rating and stiffener rings

    I believe it is telling you the Maximum Allowable External Pressure (MAEP)for each shell course. The courses were the MAEP is equal to the ring is probably because the shell is just suitable for the external pressure probably because of the ring spacing. If you make the rings closer together the...
  6. cycguy

    WRC 107 - nozzle loads

    Gentlemen, It is also important to point out that in Compress, that the WRC loads applied to the nozzles do not get transfered to the analysis of the vessel. The WRC analysis only checks the nozzle to shell junction for stresses. The loads should also be applied to the vessel via the "Loads"...
  7. cycguy

    FLUE GASES DUCTS: ROUND vs RECTANGULAR

    For design of a rectangular duct use ASME, Section 8,Div.1, Appendix 13. The rectangular duct will need reinforcing depending on the pressure.
  8. cycguy

    High Temperature Flange Bolting

    On a ss304H Sect.8, Div.1 pressure vessel with a design temperature of 1380 F, and max. operating temperature of 1310 F there is a class 600 flange subjected to high external nozzle loads. Per my Compress program if the loads were imposed on the flange, the flange would need to be a class 1500...
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