Over time, rail car vessels need attention. Whether the interior walls have thickened from overuse or the rail car owner is planning a service upgrade, a caustic wash is often used. Based on our experience we recommend a caustic wash any time a rail car vessel is due for HM-201 compliance testing.
Our experienced team uses a commercial alkaline wash water solution containing 1-2 percent sodium hydroxide to perform a caustic wash procedure. The caustic soda and solutions that are employed are Kosher certified and meet Food Chemical Codex specifications.
When that step is completed, we repeat the cleaning process with the fogger wash system. The process returns the tank’s interior to a bare metal condition. Our process is extremely effective in removing baked on vegetable oil skins and solidified residues.
Our Best Practice Approach
Our service offerings also include wiping down the interior of the tank to condition or season carbon steel services. Rail cars constructed from carbon steel can develop surface rust that can contaminate the flavor, color or other characteristics of the products loaded into that tank. Our company’s best practices approach suggests that an oil wipe should follow soon after a tank has been washed with a caustic solution unless it is scheduled for release or compliance testing.
Oiling tanks protects the metal from corrosion and prevents rust from forming. We work closely with our customers to ensure that the oils used are compatible with the vessels scheduled service.