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  1. quizzical1

    Surface finishes for molded rubber parts...

    Hi All, Maybe a stupid question, but are there surface finish callouts for molded rubber parts? I know of the ARPM mold finishes F1 thru F4 but wasn't sure if that transferred to the molded part surface finish as well. TIA, Q~
  2. quizzical1

    Seeking Corrosion Engineer Consultant to work with for solving DHWR piping issue...

    thanks Steve. EdStainless, i just messaged you on linkedin
  3. quizzical1

    Seeking Corrosion Engineer Consultant to work with for solving DHWR piping issue...

    thanks dik! @EdStainless, can you please let me know how to get in contact with you for some consulting work?
  4. quizzical1

    Seeking Corrosion Engineer Consultant to work with for solving DHWR piping issue...

    Hi All, Can anyone recommend a good Consultant to work with me on solving a few issues we are having? TIA, Q~
  5. quizzical1

    Vintage airplane bypass valve identification...

    Hi All, Any idea who made this valve? It came in from the Aero Vintage Academy in France and they are asking us. TIA ~Q https://files.engineering.com/getfile.aspx?folder=37cebbe5-434e-480c-921c-65c2a22d2876&file=valvepic3.JPG
  6. quizzical1

    Electrician Apprentice opportunities?

    thanks, guys!
  7. quizzical1

    Electrician Apprentice opportunities?

    I have a friend who’s graduating BTI also known as Berks technical institute at the end of November and he is in the electrical program and has a GPA of 4.0. Does anyone know of any good electrical apprenticeship opportunities in the Lancaster/Ephrata PA area where he can apply? TIA Q~
  8. quizzical1

    316SS machining vendors....

    Hi All, Can anyone recommend reputable ones? Mainly round stock turning parts from 1/8" up to 3" Dia. Located in the NorthEast if that matters.... TIA ~Q
  9. quizzical1

    Best plastic to use for potable hot water

    Sorry guys, some clarification: Tug - largest size would be 1" NPT (thanks for the link) Pedarrin2 - nominal temp ~140F and 180F for disinfection. Or the use of chemical (Chlorine Dioxide) Working pressures would typically be 50 - 80 psig but am concerned about structural integrity (hence...
  10. quizzical1

    Best plastic to use for potable hot water

    Hi All, Can anyone recommend a plastic or range of plastics for use as a potable water commercial plumbing valve body / internals that can accept the stress of NPT connections and water pressures up to 200F @ 150 psig? We were considering PVC, CPVC, PE, PEX, PE-RT, PP, SP, ABS, and 30%...
  11. quizzical1

    NPT pipe thread sealant for steam...

    Thanks everyone.
  12. quizzical1

    NPT pipe thread sealant for steam...

    Thanks everyone, yes, very familiar with Swagelok fittings but never thought to use it here. also never tried 577 but willing to see if there's an improvement.
  13. quizzical1

    NPT pipe thread sealant for steam...

    Hi Ed, Saturated steam up to 150 psig 366F that is used ~ 8 hrs / day then shut off overnight and left to cool off. we can add traps to the line ends to keep the line near 200F if that helps in reducing the huge temp swing to within 166F.
  14. quizzical1

    NPT pipe thread sealant for steam...

    Hi All, We're experiencing leaking pipes - mainly in the 304 SS material - at the threaded connections over time as the piping is exposed to thermal cycling between 338F and room temp daily. We have tried Loctite 567, Rectorseal, X-Pando and MegaLoc sealants but all have eventually leaked...
  15. quizzical1

    Centrifugal pump idling cooling water flow calculation

    thanks everyone!
  16. quizzical1

    Centrifugal pump idling cooling water flow calculation

    georgeverghese, that's exactly what i'm looking for. can you cite any references?
  17. quizzical1

    Centrifugal pump idling cooling water flow calculation

    Thanks again everyone. I really appreciate the help!
  18. quizzical1

    Centrifugal pump idling cooling water flow calculation

    No, not an NFPA installation - I was just quoting from their Standard and it made me wonder if there were any online calculators that could estimate the minimum continuous thermal flow for a given pump setup. Here's what i found...
  19. quizzical1

    Centrifugal pump idling cooling water flow calculation

    thanks, guys - i really appreciate all the help!
  20. quizzical1

    Centrifugal pump idling cooling water flow calculation

    Hi All, NFPA 20 4.13.1.4 states “The valve shall provide sufficient water flow to prevent the pump from overheating when operating with no discharge”. Does anyone know where I can find the equations or an online calculator to quantify the required flow for keeping an idling centrifugal pump...

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