Tanker driver question

That's why trailers that contained flammables should not be vented to the atmosphere after being pressured off with nitrogen. Vapor recovery is a thing, for good reason.

 

Don't do that.

 

Thus the reason you never remove placards even when the trailer is unloaded. Let the tank wash people do it.

 

2 employees died at our company tankwash because it had been pressurized with Nitrogen. Even after relieving pressure enough nitrogen remained to suffocate the 1st employee to enter trailer and the 2nd employee that tried to rescue #1.

 

Be careful venting nitrogen. It has the same approximate atomic weight as oxygen. So it hangs in the air, neither rising up or sinking to the ground. It may be an inert gas ( won't ignite ), if it enters your lungs, you will suffocate.

Pressured tank should not affect hsndling. But opening a pressured tank without knowing about the pressure can be dangerous. The water cannons usefd by riot police are ONLY 6 psi.

Good questions. Be careful. Your questions indicate you are. Good luck ghoing forward.

 

I'm curious as to why you are draining "residue". At every tanker company I worked, you could not leave a cusstomerr with a "heel". How do you capture your "residue" at yyour yard? That sounds fishy.

 

No DOT ruled for pulling a pressurized tank trailer. Many products are waterr sensiyive and neef a nitrogen blanket. Also cryogenic trailers are under pressure as well as LP and CNG trailers.

But a 307/407 trailer under pressure should be marked or tagged to cvommunicate the risk.

 

We bring retain back to the yard all of the time what’s fishy about it?

 

My tank jobs were with for hire carriers. Bringing back more than gallons of product could get you fired. Unless you are delivering gasoline/fuel oil. Maybe you are doing a dedicated run?

For a for hire carrier, going to a tank wash with a heel leads to charges for drumming it off and disposal.

Again, maybe your run is unusual, but most companies don't want product coming back.