<a href="//commons.wikimedia.org/wiki/Category:Gas_flares" title="Category:Gas flares">Flaring of gas</a> at the chemical plant <a href="https://de.wikipedia.org/wiki/Category:Rheinland_Raffinerie" class="extiw" title="de:Category:Rheinland Raffinerie">Rheinland Raffinerie</a> in <a href="https://en.wikipedia.org/wiki/Wesseling" class="extiw" title="en:Wesseling">Wesseling</a>, Germany: 
<dl><dd>In the chemical industry, flares are usually used for the safe removal of combustible gases that do not occur continuously. The use is often as a high torch.</dd></dl>
When industrial plant equipment items are over-pressured, the pressure relief valve is an essential safety device that automatically release gases and sometimes liquids. Those pressure relief valves are required by industrial design codes and standards as well as by law.
<p><a href="//commons.wikimedia.org/wiki/User:Spielvogel" title="User:Spielvogel">Spielvogel</a>
</p>
<dl><dd>For a gallery of some more of my uploaded pictures you may see: <a href="//commons.wikimedia.org/wiki/User:Spielvogel" title="User:Spielvogel">here</a>.</dd></dl>
<span class="int-own-work" lang="en">Own work</span>