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  1. dannyo

    Pipe Flow (Sudden Contraction)

    Thanks guys for the response, I think I'm getting a better handle on the situation. I believe I was wrong to even think of doing an orifice calculation. I actually found an example problem in one of my old textbooks. When I followed the text's example (it uses the Bernoulli equation with...
  2. dannyo

    Pipe Flow (Sudden Contraction)

    We are to assume the length of the pipe @ 100 ft for bidding. Also, I believe the exiting fluid is saturated liquid (at least initially). The pressure drop along the way to the blowdown tank is going to make the liquid flash, but I really haven't taken that into account. I was using just an...
  3. dannyo

    Pipe Flow (Sudden Contraction)

    Hi all! I have a problem with my calculations. A customer has a boiler operating @ 1385 psi. For blowdown (to atmospheric tank) they intend to open a valve on a line attached to the boiler (connected to blowdown tank) and I'm trying to calculate the maximum flow possible through the 1.5&quot...
  4. dannyo

    Allowable Stress

    Can someone explain to me how the allowable axial stress for a W shape column (being used as a support leg ~ 24" high) is determined? I have two differnt (or maybe the same?) ways, but am not sure which to use. AISC has a table that depends on the value of (K1*L/r). There is a table...
  5. dannyo

    Anchor bolt design / "effective bearing length" meaning & calculat

    KRH: Actually, I found them in the "Pressure vessel design manual" by Dennis Moss. In previous dealings with this book, I have learned to take his "knowledge" with a bit (quite a bit) of skepticism. Being a typical curious (and cautious) engineer I am wanting (mainly) to...
  6. dannyo

    Anchor bolt design / "effective bearing length" meaning & calculat

    On the drawing, the effective bearing length looks to be the length of a triangular load (uniformly increasing - greatest on the outside of the base plate) from a point designated as the "pivot point" to the end of the base plate (covering a distance of "Y"). This load is...
  7. dannyo

    Anchor bolt design / "effective bearing length" meaning & calculat

    I am trying to verify some equations relating to the design of anchor bolts on the saddle of a horizontal vessel in a seismic / wind load design situation. My understanding is that anchor bolt design is governed by one of three load cases including: longitudinal load, shear load, and...
  8. dannyo

    Anchor bolt design / "effective bearing length" meaning & calculat

    I am trying to verify some equations relating to the design of anchor bolts on the saddle of a horizontal vessel in a seismic / wind load design situation. My understanding is that anchor bolt design is governed by one of three load cases including: longitudinal load, shear load, and...
  9. dannyo

    Anchor bolt design / "effective bearing length" meaning & calculat

    I am trying to verify some equations relating to the design of anchor bolts on the saddle of a horizontal vessel in a seismic / wind load design situation. My understanding is that anchor bolt design is governed by one of three load cases including: longitudinal load, shear load, and...
  10. dannyo

    Anchor bolt design / "effective bearing length" meaning & calculat

    I am trying to verify some equations relating to the design of anchor bolts on the saddle of a horizontal vessel in a seismic / wind load design situation. My understanding is that anchor bolt design is governed by one of three load cases including: longitudinal load, shear load, and...
  11. dannyo

    Anchor bolt design / "effective bearing length" meaning & calculat

    I am trying to verify some equations relating to the design of anchor bolts on the saddle of a horizontal vessel in a seismic / wind load design situation. My understanding is that anchor bolt design is governed by one of three load cases including: longitudinal load, shear load, and...
  12. dannyo

    Anchor bolt design / "effective bearing length" meaning & calculat

    I am trying to verify some equations relating to the design of anchor bolts on the saddle of a horizontal vessel in a seismic / wind load design situation. My understanding is that anchor bolt design is governed by one of three load cases including: longitudinal load, shear load, and...
  13. dannyo

    Anchor bolt design / "effective bearing length" meaning & calculat

    I am trying to verify some equations relating to the design of anchor bolts on the saddle of a horizontal vessel in a seismic / wind load design situation. My understanding is that anchor bolt design is governed by one of three load cases including: longitudinal load, shear load, and...
  14. dannyo

    Bending stress in horizontal pressure vessel saddle base plate

    welding1: Thank you so much for the response. Your post was extremely helpful for my understanding of the formula and its origin!
  15. dannyo

    Bending stress in horizontal pressure vessel saddle base plate

    I am looking for a correct formula for the bending stress in the saddle base plate of a horizontal pressure vessel. The current formula I have has incorrect units. fb = [(6*M)/(tb^2)] is the formula I'm using (units of lb/in instead is lb/in^2), where fb = bending stress, M = bending moment...
  16. dannyo

    Bending stress in horizontal pressure vessel saddle base plate

    I am looking for a correct formula for the bending stress in the saddle base plate of a horizontal pressure vessel. The current formula I have has incorrect units. fb = [(6*M)/(tb^2)] is the formula I'm using (units of lb/in instead is lb/in^2), where fb = bending stress, M = bending moment...
  17. dannyo

    Bending stress in horizontal pressure vessel saddle base plate

    I am looking for a correct formula for the bending stress in the saddle base plate of a horizontal pressure vessel. The current formula I have has incorrect units. fb = [(6*M)/(tb^2)] is the formula I'm using (units of lb/in instead is lb/in^2), where fb = bending stress, M = bending moment...
  18. dannyo

    Bending stress in horizontal pressure vessel saddle base plate

    I am looking for a correct formula for the bending stress in the saddle base plate of a horizontal pressure vessel. The current formula I have has incorrect units. fb = [(6*M)/(tb^2)] is the formula I'm using (units of lb/in instead is lb/in^2), where fb = bending stress, M = bending moment...
  19. dannyo

    Bending stress in horizontal press. ves. saddle base plate

    I am looking for a correct formula for the bending stress in the saddle base plate of a horizontal pressure vessel. The current formula I have has incorrect units. fb = [(6*M)/(tb^2)] is the formula I'm using (units of lb/in instead is lb/in^2), where fb = bending stress, M = bending moment...
  20. dannyo

    boiler corrosion pitting

    Cowtown: If you are getting 1.5 ppm boiler feed water, you need to check the operation of your Deaerator. The industry standard for BFW out of the DA is < 7ppb. I don't have a clue about the reaction kinetics mentioned above, but if it is oxygen limited, you should probably reduce the O2...

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