49 CFR 172 Special Provision B81 (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	B81
Description	Venting and pressure relief devices for tank car tanks and cargo tanks must be approved by the Associate Administrator.
HazMat with this Code	UN 2015 - Hydrogen peroxide, stabilized or Hydrogen peroxide aqueous solutions, stabilized with more than 60 percent hydrogen peroxide UN 2014 - Hydrogen, peroxide, aqueous solutions with more than 40 percent but not more than 60 percent hydrogen peroxide (stabilized as necessary)

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