USA Canada

Contact Us

Physical Address
1420 Industrial Way
Union Gap, Washington, USA 98903
Map & Directions »

Mailing Address
1420 Industrial Way
Union Gap, Washington, USA 98903

(Toll-Free in North America)

Fax Number

E-mail -

You do not have the Flash plugin installed, or your browser does not support Javascript. To view the video presentation on this page, please click here to download the current Flash player.


Our vessels vent normally due to the natural vaporization of the products we transport. As the liquid begins to warm above temperatures that allow it to remain in a liquefied state, it essentially boils, vaporizing into a gas.

If the vessel isn't vented and the pressures are not regulated to remain below the normal working pressure, two things will happen. The first being the vessels' safety system will begin to automatically vent the pressure. The second being if the safeties cannot keep up with the pressures, a secondary relief will begin to vent.

There are always dual redundant safety systems on our vessels. Another bit of equipment that constantly vents is our Road Relief. This allows our vessels to go over the road at a safely maintained pressure of 21 PSI. Anything over 21 PSI over the road constitutes a different regulation under MCC 331.

« Back to Safety Information