New in 2021: Printing version of the âOEVAâ articulated tank wagon in the design of the epoch V. In the early 1990s, the first tank wagons were built with a so-called âkinking tankâ. The boilers were designed in such a way that the two halves of the boiler tilt toward the center by 3° each. Therefore, the contents of the boiler, mainly mineral oil products, are almost completely discharged without any other aids. Since the lightweight steel vehicles are suitable for higher speeds, they were soon also procured by other companies throughout Europe. These wagons can be found as P (=private) wagons in the stock of all European railway companies.This text is machine translated.