49 CFR 172 Special Provision R1 (R-Codes)

These provisions apply only to transportation by rail.
DescriptionA person who offers for transportation tank cars containing sulfur, molten or residue of sulfur, molten may reference the Sulfur Institute's, “Molten Sulphur Rail Tank Car Guidance document” (see §171.7 of this subchapter) to identify tank cars that may pose a risk in transportation due to the accumulation of formed, solid sulfur on the outside of the tank.
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