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  1. 1503-44

    US REFINERIES CANNOT PROCESS LITE OIL

    I think the smaller refineries make those higher octane additives and speciality oils, so they have a better margin. From what I've found out, larger refineries might have a break even year or two, then they get a pretty damn good one. Surprisingly enough that's when the oil prices are going...
  2. 1503-44

    Air India 787 crashes on take off

    Runway is 3500m (11500ft) and the dust cloud after rotation seems to say they used every inch of it. FlightRadar24 corrected their initial position to show they used the full runway. There appears to be a missing ADSB transmission before receiving a position much farther down the runway...
  3. 1503-44

    Air India 787 crashes on take off

    Anybody have a flight track file? FlightRadar24 Initial ADS-B data from flight #AI171 shows that the aircraft reached a maximum barometric altitude of 625 feet (airport altitude is about 200 feet) and then it started to descend with an vertical speed of -475 feet per minute.
  4. 1503-44

    I asked my AI

    Makes sense. I guess. Kind of a good thing for engineers and accountants.
  5. 1503-44

    Single Line on Piping

    JUST DRAW A SINGLE LINE DOWN THE CENTER OF THE PIPE
  6. 1503-44

    advice on construction of a gantry crane frame for a portable demountable hoist

    Post this in the Structural engineering forum. Not much traffic here.
  7. 1503-44

    I asked my AI

    They'll have to walk around with their little Casios. Why can't LLMs hand off their calculations to XL? I checked with https://checalc.com/solved/gasPipeSizing.html The General, or AGA equation should be used. This pipe is too small and short to use other equations. That gives flows 4x the...
  8. 1503-44

    Question on V-Loops

    No, although I think conversing with AI for long periods of time has had a significant effect on my writing style. Why do V-Loops have lower allowable pressures as size increases? Is "Because size increases." not a perfectly logical, if not obvious, answer to the question asked? I am...
  9. 1503-44

    Struggling to Bridge Academic Success & Practical Experience in Aero Eng. Help

    Like drilling dry oil wells. In the quarterly report appears, "We are successfully delineating the reservoir. "
  10. 1503-44

    Axial pipe load - how is this transferred to the pad foundation

    They're about as close to no load, no restraint as you can get. Always used on refinery heat exchanger pedestals. Make the top pad larger than the bottom to keep out the dirt and sand and thereby reduce wear.
  11. 1503-44

    Grim news... Trump's 2026 budget would slash NASA funding by 24% and its workforce by nearly one third

    Elon and his 4 coders will take up the slack. Just tell us what planet you want to go to. We can simulate anything. AI makes very good pictures of anything nobody has ever seen before and hopefully never will again. 3rd world? Such high hopes you have.
  12. 1503-44

    Struggling to Bridge Academic Success & Practical Experience in Aero Eng. Help

    Look at Musk's 9 rockets. "All of them were successful." You just need to change the (verbal) spin.
  13. 1503-44

    Question on V-Loops

    Because size increases. Consider 2 pipes One is 10" diameter, one is 20" Both have walls 1" thick. Allowable Stress in the walls = 500 psi Calculate allowable pressure Take a 1" length of pipe. Wall Area is 2 walls x 1"wt x 1"length = 2in^2 Stress = PD/2/wt Stress x 2 x wt / D = P For 10" pipe...
  14. 1503-44

    Axial pipe load - how is this transferred to the pad foundation

    Why are you not using a steel/steel or Teflon slide plate to limit axial load transmission to the supports?
  15. 1503-44

    I asked my AI

    I need to design a 10-inch steel pipeline that will carry 1000 PSIG of natural gas with a steel yield stress of 52,000 psi and a design factor of 0.72, you can use the design formula specified in 49 CFR § 192.105: $$ P = \frac{2St}{D} \times F \times E \times T $$ Where: - \( P \) is the...
  16. 1503-44

    I asked my AI

    to determine the flow rate of natural gas in a 10-inch steel pipe that is 5000 feet long, with an inlet pressure of 100 psia and an outlet pressure of 75 psia, we can use the Weymouth equation, which is suitable for high-pressure gas pipelines. According to the context, the Weymouth equation is...
  17. 1503-44

    Trenching Groundwater

    You will need to reevaluate the pipeline's stability in regards to buoyancy. If it's unstable, you may need to increase the pipe's weight with saddle blocks, or concrete coating the pipe, or some other means. I have used screw anchors in such situations. They are often cheaper and easier to...
  18. 1503-44

    US REFINERIES CANNOT PROCESS LITE OIL

    https://chemengvirtual.uwaterloo.ca/distillation-lab/simulator.html
  19. 1503-44

    Vertical pipe support load

    I agree with Snickster's approach. Consider it as a vertical pipe with an end cap load. Reactions at all supports on the vertical pipe are thereafter distributed according to the stiffness of the supporting points. If the first support is fully rigid, the end cap load cannot go any further up...
  20. 1503-44

    Axial load profile for a submerged pipe. How can this textbook be correct?

    A= angle from vertical Total Buoyant Force = 22,000 lbs Weight in air = 170,000 lbs Weight in water = 148,000 lbs Think of the pipe being closed with a welded end plate with area =4.96 in2 The axial load on the bottom of the pipe due to pressure = 4.96/144 * 10,000 *64 pcf * cos(A) The...

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