46 C.F.R. § 151.50-36 Argon or nitrogen.
Title 46 - Shipping
(a) A cargo tank that contains argon or nitrogen and that has a maximum allowable working pressure of 172 kPa (25 psig) or greater must have one of the following arrangements: (1) A refrigeration system that keeps the tank pressure below the safety relief valve operating pressure when ambient temperatures are 46 °C (115 °F) air and 32 °C (90 °F) water. (2) A relief valve or pressure control valve that maintains the tank pressure below the setting of the tank's required safety relief valve in ambient temperatures of 46 °C (115 °F) air and 32 °C (90 °F) water. (b) A cargo tank with a maximum allowable working pressure of less than 172 kPa (25 psig) is approved by the Commandant (G-MSO) on a case by case basis. (c) Section 151.50–30 also applies to the carriage of argon or nitrogen. [CGD 88–100, 54 FR 40040, Sept. 29, 1989]
Title 46: Shipping
PART 151—BARGES CARRYING BULK LIQUID HAZARDOUS MATERIAL CARGOES
Subpart 151.50—Special Requirements
§ 151.50-36 Argon or nitrogen.
