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  • Users: ktgottfr
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  1. ktgottfr

    Bearing lubrication flowrate effect on lubrication regime

    Hi Folks! I have a question here that I hope to use to improve my intuition of how rolling bearing lubrication works, and to settle a disagreement with a colleague if possible :) Basically, what we would like to know is whether or not the particular oil flowrate to the bearing has much of...
  2. ktgottfr

    Piping system or pressure vessel or category H fitting?

    Greetings all, I have a question regarding whether a system is considered a piping system or a category H fitting. We have a small piping system that consists of a few feet of 1" pipe at 200psi, with a small radiator in the line. The radiator is just an air radiator with an air driven fan...
  3. ktgottfr

    Pressure components sourced from China

    Hi Guys, We're in a bit of a quandary over here regarding an aftercooler system we are ordering from China. The aftercooler is simple, just a radiator and a moisture separator. We are purchasing from the OEM and so we were assuming that this was a pre-engineered system. However, we are...
  4. ktgottfr

    304 stainless 1/4 to 1/2 hard plate availability?

    Greetings all - I have recently started a project for a prototype engine. There are some papers in the literature that suggest 304 stainless hardened to 1/4-1/2 hard (125ksi UTS 80ksi yield) will have the fatigue properties we want for UHCF. However, I am having a hard time sourcing this...
  5. ktgottfr

    seal welding non-weldable materials from ASME Section II part D

    Greetings! I have a question pertaining to welding of materials listed in ASME Section II part D. Specifically, bar stock of SA 564 type 630 (S17400) is listed with a W1 note, which indicated that this material is not for welded construction. However, I wish to use this material in a...
  6. ktgottfr

    high strength pressure vessel materials

    Hello, I am in the process of doing the preliminary design on a pressure vessel with a couple of unusual parts. The main part I am concerned about at the moment is a 'spring tube' that will be welded to an opening on the main pressure vessel body. This spring tube is basically a series...
  7. ktgottfr

    Can I use 17-4 stainless for vessel wall using ASME section vii div 1?

    Section VIII Div. 1 part UHA-11 general (a) seems to say that I can use any of the materials listed in table UHA-23 for my pressure vessel wall. Included in table UHA-23 is material "SA-705 S17400 630", which is 17-4 stainless. I was hoping someone could confirm this, as in Section VIII Div. 2...
  8. ktgottfr

    higher strength materials for pressure vessels in ASME B31.3

    Greetings, I am designing a small fitting to be installed inline on a 1-1/2" pipe. This fitting is basically a small pressure vessel packed full of components (so that there is very little free internal volume) and is required to be machined out of a solid block of material. Now, here is...
  9. ktgottfr

    Nitriding over hard chrome plating

    Greetings, I have a shaft of which a small area has been hard chrome plated. I now wish to liquid nitride the remaining surface of the shaft. I have been told by another engineer that nitriding will not affect the chrome plated layer, but I was hoping to get an opinion from someone with...
  10. ktgottfr

    Nitriding over hard chrome plating

    Greetings, I have a shaft of which a small area has been hard chrome plated. I now wish to liquid nitride the remaining surface of the shaft. I have been told by another engineer that nitriding will not affect the chrome plated layer, but I was hoping to get an opinion from someone with...
  11. ktgottfr

    larger diameter mechanical face seals

    Greetings! Does anyone know of a manufacturer that makes a seal with a 6" bore that can seal at least 750psi at 1800rpm? I have been looking into off the shelf mechanical seals for my application, and have noticed that most seals top out at around 400psi at this bore dia. and rotational...
  12. ktgottfr

    Windchill effect in simplified methods?

    Greetings all, I have been working on an HVAC calculation for a shelter made from a standard sea container. I have been using ASHRAE 2001 as a guide. However, I was asked by the clients to take a 50km/hr wind into account in the heat loss and/or gain through the walls. My problem is that...
  13. ktgottfr

    Wind effect on heat loss/gain through walls

    Greetings all, I have been working on an HVAC calculation for a shelter made from a standard sea container. I have been using ASHRAE 2001 as a guide. However, I was asked by the clients to take a 50km/hr wind into account in the heat loss and/or gain through the walls. My problem is that...
  14. ktgottfr

    multi-phase joules-thompson effect problem

    Hi all, I am currently using the NIST SUPERTRAPP database to determine the liquid/gas phase composition of a mixed fluid. The fluid is raw natural gas from a pipeline, and so contains c1, c2, etc plus some water. Now, here is my problem. This fluid passes through a pressure regulator valve...

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