49 CFR 172 Special Provision B47 (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	B47
Description	Each tank may have a reclosing pressure relief device having a start-to-discharge pressure setting of 310 kPa (45 psig).
HazMat with this Code	UN 2031 - Nitric acid other than red fuming with not more than 20 percent nitric acid UN 2031 - Nitric acid other than red fuming, with at least 65 percent, but not more than 70 percent nitric acid UN 2031 - Nitric acid other than red fuming, with more than 20 percent and less than 65 percent nitric acid UN 2031 - Nitric acid other than red fuming, with more than 70 percent nitric acid

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