| 摘要 |
<p>PURPOSE:To enable a large inside inspection device to be used by attaching a carry-in and carry-out device for an inside inspection device which internally inspects the inside of a low temperature liquefied gas tank in operating condition to a displacer type nozzle flange or a manhole flange. CONSTITUTION:The diameter of a displacer type nozzle 1 is generally about 600mm, and there is no valve or the like in the middle space. Therefore, a large inside inspection device can be used utilizing said space profitably. A carry-in and carry-out device 18 for an inside inspection device is attached to the flange 8 of a manhole 7 for maintenance. A flaw detector and a television camera are incorporated into inside inspection device 24.</p> |
