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  • Users: FLisa
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  1. FLisa

    Torque for NPT connections

    I have done many searches looking for recommended torque by size and material for threaded pipe connections. Almost all sources give a "number of turns" method. Does anyone know why torques are not used?
  2. FLisa

    Lag Left Turn Signals

    Just a general question a driver for you traffic engineers from a Manufacturing Engineer. The city of Tucson, AZ instituted "Lag Left" turn signals a number of years ago. The story was that it would move more vehicles thru the left turn lanes since some would get a chance to turn...
  3. FLisa

    Visual Judgement of Parallel and Perpendicular

    I am looking for information on the accuracy of visual assessment of angles, specifically how many degrees off of parallel or perpendicular do two objects (medium size 1 foot to 4 foot range) have to be for someone to notice?
  4. FLisa

    Torque for Threaded PVC Pipe Joints

    I have been looking for a source of proper torque for pipe threads on PVC Schedule 80 pipe. Most sources list a number of turns method (2 turns past finger tight, 1/2 turn past hand tight, etc.) This seems very open to me. Whose fingers and whose hands?

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