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  • Users: FDS2008
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  1. FDS2008

    High Temperature PSA

    I am working on a project that involves a short section of piping that is at 1,800°F and 5 psig design conditions. I have been requested to provide the stress analysis. They want the design to B31.3, even though it is not considered pressure pipe. The conundrum is what allowable stresses to use...
  2. FDS2008

    Buckling Calculations

    Does anyone know if there is some type of rough calculations that we can use to verify whether a larger pipe (D/t>100) will buckle if we have a compressive load, bending and external pressure? Or do we need to carryout FEA on this? Thanks FDS2008
  3. FDS2008

    SETTLE A FRICTION ARGUMENT?

    I have a physics question that I can't seem to answer using textbooks. I have a vertical pipe that will be clamped to some structural steel. We are trying to calculate the forces required to restraint the pipe based on friction. The clamp will pull the pipe towards the structural base and...
  4. FDS2008

    Too Much Steam Pipe Slope?

    My fellow knowledgeable ones! Is there such a thing as too much slope on a steam line? I am working on a few lines, one which is superheated (540°F @ 185 pisg) and another that is 185 psig saturated.I realize the norm is approx. 1:100, but what about 1:200. This suits our pipe elevation...
  5. FDS2008

    Too much Steam Piping Slope?

    My fellow knowledgeable ones! Is there such a thing as too much slope on a steam line? I am working on a few lines, one which is superheated (540°F @ 185 pisg) and another that is 185 psig saturated. I realize the norm is approx. 1:100, but what about 1:200. This suits our pipe elevation...
  6. FDS2008

    Welding Extruded Aluminum 6061-T6 or 6063-T6

    Fellow experts, I am working on a security gate which will have an extruded rail beam acting as the track rolling on bearings and also supporting the fencing. We will need to weld the fence (2 x 2 aluminum tube) to the rail beam. Is there any literature out there (free of course) that I can...
  7. FDS2008

    Full Flange Rating Hydrostatic Pressure

    Can someone clarify what this concept is? I am working for an engineering firm who is working for a client in the oil and gas and they indicate that for new oilfield projects, they typically determine the Hydrostatic test pressure by the "full flange rating". I understand this as the maximum...
  8. FDS2008

    Rack & PInion

    I am looking into a rack & pinion drive system for a parking lot security gate and wanted to know if anyone has any experience with the max. allowable displacement (from vibration) between the two. I selected a gear with DP=5, PA=20° and a pinion of 2.4" pitch dia. with 12 teeth. The overall...
  9. FDS2008

    CONDENSATE AT START-UP OF SUPERHEATED 900# STEAM LINE

    My fellow engineers, I have an issue that is somewhat related to the thread "Condensate in a superheated steam line (#391-142624 (16-Dec-05)". No I don't want to recesitate this thread, but it relates to my problem slightly. Here goes...... We designed a steam downcomer (14" A-335 P11 Sch...
  10. FDS2008

    Clamped shoe - Max, axial load allowable

    Greetings fellow pipers, I am working on a project in which we have a 14" dia. 900# steam line riser which requires horizontal restraint. We sepcified 24" long shoes that are clamped to the pipe with chrome molly clamps. The piping is also chrome molly. We are using a proprietary design...

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