"Vagono-remonten zavod - Karlovo" PLC, mostly known as VRZ Karlovo, was established in 1964 with principal business activities in maintenance and repairs of freight wagons / railcars and production of spare parts. Over the past few years, the company added to its portfolio and design and manufacturing of freight wagons for the Bulgarian and European markets - railcars type Sgnss (container wagon), Zas/Zaes/Zacns (tank wagons for ligh and heavy petroleum products, acids), tanks ( replacement ), custom design wagons, different types of frames, rolling stock and many other. VRZ Karlovo have implemented ISO9001 quality system, certificates for RID classes 3,6.1, 8 and additionally have certified welding procedures via EN15085/DIN6700 and qualified welding teams and engineers.