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  1. TheRyno

    Socket weld leaks at overlap/crater

    The volume is open to vent. The leaks still occur, they are only about 1% of total parts, but they always still leak at the same location. I haven't had much time to do further trials but might be able to soon. Again I appreciate the help from everyone.
  2. TheRyno

    Socket weld leaks at overlap/crater

    Thanks for the responses so far. WBH: The weld leaks always on the tube side of the weld, see the attached pic for clarity. It seems to be lack of fusion on the thin wall and creates a pinhole leak path...
  3. TheRyno

    Socket weld leaks at overlap/crater

    Yes, the weld goes past 360 degrees, about 3/8" overlap.
  4. TheRyno

    Socket weld leaks at overlap/crater

    Hi All, I'm trying to decrease frequency of weld leaks in an automated GMAW-P socket weld process. It is a weld between a "cap" and a tube which are pressed together, then welded in an automated rotating fixture. It is SAE 1010 steel, and the cap has wall thickness .080" and the tube is .049"...
  5. TheRyno

    NPSHR for Grainger pump 4RU77

    Yes, the temp is rising, its water and it starts at about room temp and gets up to 100 F max. Really I'm trying to get the pressure drop to match the data we already have, so I'm just trying to leave every stone unturned and control and check as much as possible to figure out this pressure drop...
  6. TheRyno

    NPSHR for Grainger pump 4RU77

    Dubmac: I'm worried about NPSHR because I'm getting vacuum readings on the suction side of the pump while running the system (about -.6 psi max). I'm trying to figure out why I'm getting unusually high differential pressure drop across a filter thats being testing in a closed loop with this...
  7. TheRyno

    NPSHR for Grainger pump 4RU77

    Hi All, I have called grainger about getting the technical data for their DAYTON 4RU77 pump, i.e. I wanted a pump curve and NPSHR. They faxed me basically a maintenance and repair guide. The only useful piece of info I got from it was that for swimming pool application the Suction head can be...

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