49 CFR 172 Special Provision TP45 (TP-Codes)

These provisions apply to the transportation of hazardous materials in IM and UN Specification portable tanks.
DescriptionEach portable tank must be made of stainless steel, except that steel other than stainless steel may be used in accordance with the provisions of 173.24b(b) of this subchapter. Thickness of stainless steel for portable tank shells and heads must be the greater of 6.35 mm (0.250 inch) or the thickness required for a portable tank with a design pressure at least equal to 1.3 times the vapor pressure of the hazardous material at 46 °C (115 °F).
HazMat with this Code

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