I deal with these numbers every day at work and still have no clue what they are.
On the 33000 gal tank cars that I get brought to me out at Verne Jct, that I load Propane and Butane on, There are these numbers that I have to record off every car. One is most commonly used is 112W340, the other is 102W340. (Don’t quote me on the exact number because I cant remember them off the top of my head.)
What are the numbers used for?
Perhaps it is 112J340W, which is a common LPG tankcar type. Here is the meaning, if I remember correctly. The 112J is the tankcar type, in this case a pressure car with certain features (which I do not remember). The 340 is the test pressure. The W means fusion welded construction.
Eric’s right about the definition of a 112J car–the “J” means “jacketed” (with insulation). The other type would probably be a 112A340W, or perhaps a 105A-series number; those are all pressure tanks. Most common non-pressure tanks these days are the 111A and 211A tanks. If you really saw a 102-type tank, let me know–those would be ancient domed cars!
Sometimes I’ve heard passing tankers give off a really loud hissing noise. Is it just venting pressure?
Here I thought it was some really thick oil. [swg]
Dan, you cracked me up. It’s well I had already finished my coffee. [:D]
Johnny
Yep. Those are the right numbers. I had thought that the 340 might have been the pressure. I had been told to keep my pressure near 300 and I know my high pressure switch trips at 315.