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  • Users: Tankman650
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  1. Tankman650

    Steel Stack Design

    I am looking for some good reference books on steel stack design. Does anyone have good refernce books they will recommend? Thanks
  2. Tankman650

    AISC Guidelines for Seismic Design

    I need a reference by AISC dated 1984. I tried the AISC web page and they do not list it. Also tried Linda Hall and other libraries and google search. Can someone tell me where to obtain AISC "Guideline for the Seismic Design of Oil and Gas Pipeline Systems", Douglas Nyman, Ed. 1984 Thanks
  3. Tankman650

    High Temperature

    I have a PV that must be designed for upset condition of 1200 deg. F. The code material for CS only goes to 1000 deg. F. Any thoughts or ideas for getting allowable stresses at this temperature. Creep and distortion is not a concern.
  4. Tankman650

    API 620 Stiffener

    40 years ago, a major tank company built a tank for my customer (I don't think the tank company is in business now). They now want to replace it in kind. The tank has a body cone with a compression stiffener. The original construction shows the cone welded to the horizontal leg of the...
  5. Tankman650

    Repads on Nozzles

    API650 has repad sizes for nozzles. It also says that repads can be designed per API620. In API620, the size of the OD of the pad is limited to 2d of the nozzle. Anyone know why the OD of the repad for API650 is called out as larger than permitted per API620???
  6. Tankman650

    Piping in Blinds

    I see a lot of instances where 10" piping is inserted into 20" blinds. The blind has a hole cut out and the 10" pipe is fillet welded in to the blind. I am wondering how this is allowed in the piping codes. If I do this for a sight glass in a blind for a presure vessel, ASME will require that...
  7. Tankman650

    ANSI B16.47

    Does ANSI B16.47 have a pressure/temperature chart like B16.5??? I have a B16.47 150# flange at 300 degrees and need to document the allowable pressure. I don't have the code but will get one if there are charts for pressure/temp. Thanks.
  8. Tankman650

    Vacuum on Pipe

    For large diameter pipe under full vacuum (FV) attached to pressure vessel, I always check using ASME VIII, Div 1 external pressure curves. This may be conservative but are there other ways of verifying the vacuum loads??
  9. Tankman650

    Stainless Steel Pipe

    I have a chart of pipe properties that indicates that the thickest 14" pipe for ss is 10S. The chart references ANSI B36.19 stainless steel pipe schedule numbers. I have been told by our field services that stainless steel pipe can be purchased in sch 40S with no problem. If this is...
  10. Tankman650

    Swing Bolts

    Does anyone know of a web site/catalogue for ASME swing bolts?? I have done a google search and not found any bolts that meet ASME requirements.
  11. Tankman650

    Flange Rating

    I think this has been asked before because I remember the question but can't recall the answer. For SA105, 150# flanges, ASME 16.5 shows the pressure rating decressing down to 140 psig at 600 degress F. Using App. 2 of ASME BPV Code and Section II for material stresses at 600 F, the same...
  12. Tankman650

    UL 142 TANK

    I am looking at a 20,000 gallon gasoline tank constructed to UL 142. UL 142 does not have a design method or allowable stresses , rather, there are minimum thickness for a given size. I notice that they require a hydro test pressure of 25 psig! If this was an ASME Pressure vessel designed to...
  13. Tankman650

    Tables for pipe support spacing

    Are there published tables for the maximum unsupported run of pipe per given pipe size??? I can calculate the maximun stress values but was wondering if there are standard tables for support apacing based on stress and deflection.
  14. Tankman650

    Certify Fabrication Drawings

    From time to time I have been asked to provide steel fabrication drawings with PE certification. I am asking what it means to the engineer that stamps each fab. drawing?? I assume that the engineer looks at each connection and runs calculations to assure that the connection meets the loads...
  15. Tankman650

    API650 Wind Girder Weld to Shell

    API 650 weld of Wind Girder to Shell is not addressed. ASME VII Sec 8 , UG-30 has rules for stiffener to shell as stitch weld with 2" min by 8t on both sides. For a 3/16" shell, this is almost continuous welding and seems excessive. Does anyone have a rule of thumb for this weld...
  16. Tankman650

    Pipe Allowable Stress

    Allowable pipe stress for A106 material is 20000psi at 400 deg. F. Is there an allowable increase (ANSI B31.3)due to mechanical or thermal loading like ASME SEC VIII Div. 1 ???? The pipe is well overdesigned for pressure but the thermal loading is a big problem. Thanks
  17. Tankman650

    Expansion Joint in Heat Exchanger

    I have a Heat exchanger (TEMA BEM) with an expansion Joint. The analysis per TEMA 8.xx is rather involved. I have decided to analize using FEA. I can set up the model and do the analysis and feel comfortable with the results rather than go through the TEMA calcs. My question is has anyone...
  18. Tankman650

    STAAD Pro question

    I got an advertisement from Staad. I recall that it is used for beam analysis. For shell analysis I recall someone stating that analysis results are given at mid element rather than at nodes. For those that use this program, can you correct this statement if incorrect. Thanks

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