"Starting July 1, all tank car pressure relief valves (PRV) being qualified (built or rebuilt) by the Association of American Railroads (AAR) must be entered into the..." (Luczak, 2021)
References:
Luczak, Marybeth. (2021, June 14th). Supply Side: AAR/Railinc, Siemens, TRAINFO Corp., HDR. Retrieved from Railway Age: https://www.railwayage.com/news/supply-briefs-aar-railinc-siemens-trainfo-corp-hdr/?RAchannel=news
Published on June 15, 2021