American Railroad Association is a non-profit technical association, which aims to ensure the safety, speed, efficiency, neatness and advanced technology of North American railways. Its members include the United States, Canada, Mexico and the railway freight companies of the American National Railway Passenger Transport Company. In the American railway transportation exchange service, the interchangeability and compatibility of locomotives and rolling stock and their components of each company are guaranteed by AAR's interaction rules and technical standards.
AAR's standard manuals and recommended specifications are divided into three categories. Add "M" in general technical specifications, "S" in standards and "RP" in recommended specifications. The exchange rules of railway operators are mainly about the use and maintenance of equipment; Equipment manufacturer's standard and recommended practice manual (MRSP), which mainly covers the mechanical properties of equipment and parts; The cargo loading rules are applicable to the loading regulations of railways, international trade and freight.
Consultation-establishing system-applying for certification-product testing-on-site audit-obtaining certification.
There are two institutions in China that can provide consultation, namely HEROSKY in Beijing and IRISTOM in Shenzhen.