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  1. Serrand

    Mechanical Engineer lost on civil rebar drawings

    Thank you very much guys. I sat down with manuals and a couple civil engineers and once I had done the first few I understood it's not very hard, just tedious. Regards
  2. Serrand

    Mechanical Engineer lost on civil rebar drawings

    First of all it's a third takeoff for rebar i.e. third redundency and secondly I don't need to know how to place them . All I do is finger out quantities of types by going through drawings, which by now I have no more problems with. Thirdly I don't see how a MTO should be concerning to you... no...
  3. Serrand

    Mechanical Engineer lost on civil rebar drawings

    Hello Guys, hopefully somebody can help me the internet hasn't been too helpful. I am doing a material takedown for rebar in a large bridge construction project. Never having been subjected to civil drawings before the progress is slow and painful. I was wondering if anybody could direct me to a...
  4. Serrand

    Property table

    Hello guys, I am looking for a good website on the internet that has thermodynamic properties on Nitrogen (entropy, enthalpy, specific volume...). Thank you very much for any help. Regards Domenic
  5. Serrand

    Optimization

    I have a simple optimization problem, but have almost no experience with Matlab. Is there a good tutorial website you guys can suggest to me? Thank you Domenic
  6. Serrand

    PE vs PE with FEP liner

    Stainless steel is only stainless as along as it has an oxygen source to replenish its protective layer, however, this system will be submerged for extended periods of time. The experience my company has made with 316 and saltwater has usually ended in rust (sooner or later). So I think...
  7. Serrand

    PE vs PE with FEP liner

    Thank you very much for your input, I should have mentioned that the fluid to be cooled/heated is salt water and the temperature range is between 2 and 40 degrees. I have had a look and I don't think titanium is anywhere near the price of FEP, this will be a one off heat exchanger so all parts...
  8. Serrand

    PE vs PE with FEP liner

    Hello everybody, I am designing a heat exchanger which involves corrosive materials, which excludes any metal as possibilities as materials. I seem to have narrowed it down to PE by comparing polymers with their respective thermal conductivities. Now I am faced with the choice between High...
  9. Serrand

    Tygon Material

    Hello, I am looking for material properties of Tygon, especially thermal conductivity. Has anybody a place they can point me to, the internet doesn't seem to offer too much. Or else can anybody tell me if it is suitable for usage in a heat exchanger. Thank You Domenic
  10. Serrand

    Hydro Static Pressure Testing

    I am conducting tests on a new underwater sensor, one of my scheduled tests is a 15000psi hydrostatic pressure test. With that I mean the sensor will have to be submerged in water and the pressure increased to 15kpsi. This is a mechanical test, i.e. I am looking for structural integrity after...
  11. Serrand

    Hydro Static Pressure Testing

    Hello, not sure if this is the right forum to post the question in, but I have a couple Sensors which I would like to pressure test up to 15000psi in water. Is there anybody that knows of a facility preferably in Canada. Thanks a lot Domenic
  12. Serrand

    Calibration Tank

    Hey guys, I am currently making a calibration tank for underwater sensors. I am using a heat exchanger to bring the tank to a certain temperature, once it has reached it the heat exchanger will turn itself off and only the stirrer will run during the calibration. I am trying to calculate the...
  13. Serrand

    thermal conductivity question/confusion

    If you look at the resistivity, which is going to be the important factor in this case, you will see that the differences in the thermal conductivities don't make a large difference. ln(rout/rin)/(2*pi*L*k) Cheers
  14. Serrand

    Volume Flow through Propeller

    I am looking for a crude way to obtain the volumetric flow of through a propeller immersed in water. My variables are Pitch diameter RPM density and chord of the propeller. Do I need a coefficient, or an I use the relation mass flow = density x Propeller Velocity x Area. And if I can use it, how...
  15. Serrand

    Rotor Pitch

    Sorry I forgot diameter
  16. Serrand

    Rotor Pitch

    Just setting up a new heat exchanger system, in it I need a propeller that is able to overturn the volume of the tank in a given time. Could you please point me to the formula that relates propeller pitch to volume flow rate for one revolution. Thanks a lot for the help Domenic
  17. Serrand

    Nylon Spacers

    a qoute to local suppliers is out at the moment so we are waiting to hear back from them. thanks for the quick reply
  18. Serrand

    Nylon Spacers

    thx a lot guys, but once again I have also looked through microplastics and 9/32 seems to be a real oddball. I will however try the sample method. Cheers
  19. Serrand

    Nylon Spacers

    thank you, but I have tried them already they didn't have the length I need
  20. Serrand

    Nylon Spacers

    Hello everybody, I am looking for a nylon spacer for a 2-56 machine screw with a length of 9/32" or 7mm. I have been looking all over but all I can find is a version on McMaster which is over a dollar per spacer, I could get them machined locally for probably less. So if anybody has an idea...

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