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  • Users: rkuhn
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  1. rkuhn

    velocity - pulp in suspension

    You should take a look at: - "Generalized method for determining the pipe friction loss of flowing pulp suspensions”, TAPPI TIS 0410-14 (1988) - Lindsay, J.D. and Gullischsen J. “Pulp Pumping and Hydraulics”, IPST Technical Paper Series Number 562, Institute of Paper Science and Technology...
  2. rkuhn

    water hamer pictures

    Thank you all for your responses. bucs2047: I need them for November, so I have time, thanks. MJCronin: Thanks for the sarcasm; I didn't mean to bother you with my request. Of course I google it but couldn't find anything worthy, so that's why I asked. Best regards, RK
  3. rkuhn

    water hamer pictures

    Hi, I have to give a one-hour brown-bag lunch training on water hammer (just the very basics!) I am looking for some pics to illustrate the consequences of water hammer. I wonder if anyone can kindly point out where to find or send me some photos with pipe/support failure due to surge. Thank...
  4. rkuhn

    Nozzel Loads

    if the pumps are API, you can use API610 Annex F.
  5. rkuhn

    Equal water rating in stock pumps

    Hi, Thanks TenPenny and Artisi for your help. The curve's issue date is June/89. This pump service is blending tank feed from a Hi-density storage tank. Air-entrainment can be an issue here, but I have no data about this. I've made some measurements (head, flow and input power) and got an...
  6. rkuhn

    Equal water rating in stock pumps

    Hi, In a stock pump manufacturers'curve two capacities and corresponding TDH are indicated: The rated one for stock (5675 USGPM @ 73.5ft)and the "equal water rating" (5900 GPM @77 ft). The fluid is unbleached kraft with 3.5% consistency. Nevertheless, from Gould pumps' "centrifugal pump...
  7. rkuhn

    Seismic loads in a 2500m straight pipe

    bvi It's considered that the maximum temperature difference is only 7°C, so the thermal loads in the 32" diameter and 1" thickness pipe are "only" 120 tons. Thanks !
  8. rkuhn

    Branch outlet fitting

    kokopei, Look at B16.9 Factory-MAde Wrought Buttwelding Fittings, or B16.11 Forged Fittings, Socket-Welding and Threaded. For reinforcement of Welded Branch Connections look at ASME B31.3 para. 304.3
  9. rkuhn

    Seismic loads in a 2500m straight pipe

    Hi JStephen, Thanks for your answer. The pipe is under B31.11. For seismic loads it call for seismic codes. Seismic codes are very general and they hardly speak of pipes. Maybe because the pipe is pressurized (and full) the effects of this thrust load can be neglected. But I'm not so sure...
  10. rkuhn

    Seismic loads in a 2500m straight pipe

    Hi, I have a 32" slurry pipe inside a tunnel (2500 m length). The pipe is straight and is anchored in 5 points, evenly distributed. At both end of the tunnel the pipe bends and then get underground. The weight of the pipe is 600 kg / m The weight of the internal fluid is...
  11. rkuhn

    How to integrate results normal to an area

    I'm looking for statement 1), to add up the stresses distributed over a given area. I can list stresses in all nodes with the report writer tool from the Post Processing and then add them , but I don't know how to list only the stresses in the area of my interest. Is there any easy way to do...
  12. rkuhn

    How to integrate results normal to an area

    Hi Ed, I intend to design a reinforced concrete solid, modeling the solid only as an isotropic concrete. Then dimension the reinforcing steel to meet the stress demands of the applied tractions obtained from the FE analysis. In order to dimension the reinforcing steel, I need to integrate the...
  13. rkuhn

    How to integrate results normal to an area

    Hi, Is there any easy way to integrate results in a selected area from a plane cutt ? Regards, R. Kühn
  14. rkuhn

    BS7159 Code for GRP piping system

    thanks you both. I've another question: Can the BS:7159 be used with underground FRP pipe? thanks
  15. rkuhn

    BS7159 Code for GRP piping system

    Hi, I've a copy of the British Code BS7159:1989 for design of GRP piping system. In point 7.3.4.2 it dictates for the longitudinal pressure stress the folowing equation: Long. pressure stress = p (Di+t)/40t where p : internal design pressure Di : internal diameter...
  16. rkuhn

    Thrust Restraint

    Hi, I' m checking the stress analysis of a 28" GRP buried pipe with weld joints. Does CAESAR II considers the thrust restraints due to internal pressure at changes of direction? Should I provide thrust blocks at all bends ans tees ?? Yours, R.Kühn
  17. rkuhn

    ASTM A778 Gr, TP 316L

    Thanks John R. Kühn
  18. rkuhn

    ASTM A778 Gr, TP 316L

    Hi, I'm checking the stress analysis of a 12" stainless steel pipe, but I can´t find the allowable stress in the B31.3 code ( material ASTM 778 Gr. TP 316L) Yours, R. Kühn
  19. rkuhn

    Fuel Oil N¦ 6 vapor pressure

    Thanks TD2K, I'm doing NPSH calculations. I'll use the 0.1 psia and hope no bubbles will be present at the pump !!
  20. rkuhn

    Fuel Oil N¦ 6 vapor pressure

    Hi, I need the vapor pressure value for: - Fuel Oil N°6 at 140°F ( known also as Buncker C ) - Diesel at 68 °F Thanks

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