Abstract: A flange fastening skill determination apparatus includes: a receiver configured to receive output signals from respective tightening force detectors when a testee tightens a plurality of bolts for connecting flanges together, the tightening force detectors corresponding to the plurality of respective bolts; a measurer configured to obtain measurement results indicating transition of change in each of the output signals from a start to an end of tightening a corresponding bolt; a calculator configured to obtain a first calculation result indicating variation among output signal values during the tightening, a second calculation result indicating variation among output signal values at a time of completion of the tightening, and a third calculation result indicating a degree of tightening force of each of the plurality of bolts at the time of completion; and a determiner configured to determine a skill level of the testee based on the results.

Abstract: A flange fastening skill determination apparatus includes: a receiver configured to receive output signals from respective tightening force detectors when a testee tightens a plurality of bolts for connecting flanges together, the tightening force detectors corresponding to the plurality of respective bolts; a measurer configured to obtain measurement results indicating transition of change in each of the output signals from a start to an end of tightening a corresponding bolt; a calculator configured to obtain a first calculation result indicating variation among output signal values during the tightening, a second calculation result indicating variation among output signal values at a time of completion of the tightening, and a third calculation result indicating a degree of tightening force of each of the plurality of bolts at the time of completion; and a determiner configured to determine a skill level of the testee based on the results.

Abstract: A shaft sealing apparatus is provided which can easily be assembled and arranged to prevent leakage of a dope from an acetylator or the like system. A screw sleeve having a spiral groove provided in the outer side thereof is mounted on rotary shaft adjacent to a location where the rotary shaft extends through a housing. As the screw sleeve rotates together with the rotary shaft, it can return back the dope into the housing thus providing a sealing effect. The screw sleeve includes six segments fabricated by separating circumferentially into two and axially into three. The six segments are jointed together to assemble a generally cylindrical structure on the rotary shaft. The assembling process can be conducted from two radial directions on the rotary shaft between the housing and each bearing unit supporting the rotary shaft without disassembling the bearing units.

Abstract: A shaft sealing apparatus is provided which can easily be assembled and arranged to prevent leakage of a dope from an acetylator or the like system.