Design Pressure Rail Car Tanks

[krossview]

This may not by the right forum for this question, but I am calling on people's experience.

We are working on a project that involves loading rail cars at a terminal with crude oil. For this project we need to know what the common design pressure, used in the industry, for the tank on the rail car. This information is required to size vent headers and determine the allowable back pressure in the piping system. We currently have no idea what this design pressure is. Is it similar to an API 650 storage tank or is it much higher? The tank capacity of the rail car is 60 m3. The crude oil is treated (water removed) and has a low vapour pressure of 1 Psia or lower.

Your help and advise in this mater would be greatly appreciated.

Regards,

Krossview

 

[butelja]

In the USA, reference AAR Standard M-1002 SPECIFICATIONS FOR TANK CARS. The standard non-pressure car for commodity service is typically a DOT 111A100W1, which is a carbon steel car, insluated, with external heating coils. This type of car has a pressure relief valve set at 75 PSIG, which must be bubble tight to 60 PSIG. You really need to find out exactly what type of cars you will be handling to properly answer your question.

 

[krossview]

Butelja

Thanks for the info. The rail cars are not insulated and do not have heating coils on the outside. I hope this results in some more replies

Regards,

Krossview