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  1. genericmech03

    Detecting porosity in Aluminium Castings

    Hello, I thinking of using ultrasonic or x ray porosity detectors to pick up porosity in aluminum die castings. The porosities are located under the surface of a raw casting so we currently only find them after we machine them. We would like to detect porous parts before wasting money on...
  2. genericmech03

    Porosity Detection in Aluminum castings

    Hello, I was wondering if anyone had any experience in detecting porosity in aluminium die castings . We currently only detect the porosities after machining the surface away, but I would like to detect them before we waste money on the machining. I was thinking of maybe using NDI techniques...
  3. genericmech03

    Eng work in Japan

    Hello, I am heading to Japan for 12-18 months to teach english, however I would like to stay in touch with the engineering side of things. Can someone give me the lay of the land with regards to getting part time/short term mech eng work in Japan. My plan currently is to start knocking on doors...
  4. genericmech03

    Removal of Safety Relief Valves with out losing pressure

    Hi, It's a bit of a long shot but does anyone know of anyway of removing a safety relief without removing the contents of the vessel and losing pressure. We have an anhydrous NH3 chilling system, so in order to perform routine maintenance on our relief valves, each vessel must be emptied, which...

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