49 CFR 172 Special Provision B30 (B-Codes)

These provisions apply only to bulk packagings. Except as otherwise provided in this subchapter, these special provisions do not apply to UN portable tanks or IBCs.

Code	B30
Description	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(b) of this subchapter. 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 of this subchapter; c. Have a MAWP or design pressure of at least 87 psig: and d. Have a bolted manway cover.
HazMat with 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

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