| 摘要 |
<p>A storage tank for a volatile inflammable liquid is provided with an attachment fitting to which an elbow assembly can be attached to support a tapping machine. If the tank primary vessel fails, liquid retained by a secondary containment vessel can be drained out by using the tapping machine to make a hole through the attachment fitting and vessel walls. The attachment fitting is installed, when the tank is built, without impairing the integrity of the primary or secondary vessel walls or providing a hole therein.</p> |
