According to actual laws in Poland, TDT inspection wont't give a permit if trailer has minimal widths of the tank are lower than specified by the mafucaturer.
Its crucial to check widths of the tank and obtain a declaration from the manufacturer about the minimal widths for that kind of trailer
On request, our company will perform the measurements (before purchase of the trailer) and obtain material atests from the manufacturer.
Price for this service stats at 700 PLN and depands on the distance our technician has to travel.