Internal lining of wagon tanks and its inspection

The inspection interval of tank-car tanks with rubberized interior shall be changed from two years to one year, or else the cars shall be taken out of service.

In view of transportation of hydrosilicofluoric acid and other substances, a chemical analysis of the material (Soulplethane or other) replacing the rubber shall be produced and the suitability of the material for tank interior lining shall be specified. The analysis shall be delivered in connection with the next general inspection to the car inspector, and an indication thereof shall be included in the pressure-vessel inspection record. The interval of the car-interior inspection shall be cut from two years to one year until further notice, considering the necessary experiences to be gained of the resistance of the lining.