| 摘要 |
<p>A sight glass apparatus for viewing the interior of a pressurised vessel, chamber or pipe conveying fluid under pressure, the sight glass apparatus comprising: a sight glass assembly mounted over an opening into the vessel, the site glass assembly comprising a sight glass 2 adjacent the opening which provides a window to the inside of the vessel; and a containment vessel 16 mounted behind and/or around the site glass assembly for containing fluid exiting the opening in the vessel in the event that the site glass assembly fails. Also disclosed is a sight glass apparatus for viewing the interior of a pressurised vessel, chamber or pipe conveying fluid under pressure, the sight glass apparatus comprising: a sight glass assembly mounted over an opening into the vessel the site glass assembly comprising a sight glass adjacent the opening and a second site glass 5 mounted behind and spaced away from the first site glass, the first and second sight glasses providing a window to the inside of the vessel; in which either the space between the first site glass and the second site glass contains a transparent liquid or gel; or the first site glass and the second site glass are sufficiently close together that in the event of the first site glass failing, the debris from the first site glass will strike the second site glass before reaching a velocity sufficient to cause the second site glass to fail; or a valve assembly 30 is mounted inside the vessel, chamber or pipe, the valve assembly being responsive to the failure of the site glass assembly to close off the opening.</p> |
