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  1. mr0426

    API-6A BX ring grooves

    We recently encountered an issue we were not previously aware of. When a BX159 ring was inserted into a BX159 groove, we found that it only contacted on the outer edge. There was a gap on the inner edge of approx 0.8mm (0.030"). I drew (AutoCAD) the groove and ring to scale using the sizes in...
  2. mr0426

    screw thread torque calculations

    If you are in the UK there is a British Standard that provides such a method (BS3580). One of the best references I have found for bolting issues is by John H Bickford - An introduction to the design and behaviour of bolted joints (ISBN: 0-8247-8167-8 published by Marcel Dekker inc). This also...

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