Excerpts from 49 CFR §172.102. Verify against the current official rule text before relying on them.
Provision text
MC 312, MC 330, MC 331 and DOT 412 cargo tanks and DOT 51 portable tanks must be made of stainless steel, except that steel other than stainless steel may be used in accordance with the provisions of §173.24b. Thickness of stainless steel for tank shell and heads for cargo tanks and portable tanks must be the greater of 7.62 mm (0.300 inch) or the thickness required for a tank with a design pressure at least equal to 1.5 times the vapor pressure of the lading at 46 °C (115 °F). In addition, MC 312 and DOT 412 cargo tank motor vehicles must:
a. Be ASME Code (U) stamped for 100% radiography of all pressure-retaining welds;
b. Have accident damage protection which conforms with §178.345-8;
c. Have a MAWP or design pressure of at least 87 psig: and
d. Have a bolted manway cover.
Materials referencing this code
- UN 1092 - Acrolein, stabilized
- UN 1745 - Bromine pentafluoride
- UN 2481 - Ethyl isocyanate
- UN 1185 - Ethyleneimine, stabilized
- UN 1994 - Iron pentacarbonyl
- UN 2486 - Isobutyl isocyanate
- UN 2483 - Isopropyl isocyanate
- UN 2605 - Methoxymethyl isocyanate
- UN 1238 - Methyl chloroformate
- UN 1239 - Methyl chloromethyl ether
- UN 2480 - Methyl isocyanate
- UN 1251 - Methyl vinyl ketone, stabilized
- UN 1244 - Methylhydrazine
- UN 2482 - n-Propyl isocyanate
- UN 1834 - Sulfuryl chloride
- UN 2484 - tert-Butyl isocyanate
- UN 3389 - Toxic by inhalation liquid, corrosive, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50
- UN 3488 - Toxic by inhalation liquid, flammable, corrosive, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50
- UN 3383 - Toxic by inhalation liquid, flammable, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50
- UN 3381 - Toxic by inhalation liquid, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50
- UN 3387 - Toxic by inhalation liquid, oxidizing, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50
- UN 3490 - Toxic by inhalation liquid, water-reactive, flammable, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50
- UN 3385 - Toxic by inhalation liquid, water-reactive, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50