---
kind: "section"
citation: "46 C.F.R. § 151.50-36"
title: "46"
number: "151.50-36"
heading: "Argon or nitrogen."
url: "https://uscodex.org/cfr/46/151.50-36"
---

# §151.50-36. Argon or nitrogen.

- (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 (CG-ENG) on a case by case basis.
- (c) [Section 151.50-30](/cfr/46/151.50-30.md) also applies to the carriage of argon or nitrogen.

## Notes

### Amendments

[CGD 88-100, 54 FR 40040, Sept. 29, 1989]

### Authority

Authority: 33 U.S.C. 1903; 46 U.S.C. 3703; Department of Homeland Security Delegation No. 0170.1.

### Source

Source: CGFR 70-10, 35 FR 3714, Feb. 25, 1970, unless otherwise noted.

### Amendments

[CGD 88-100, 54 FR 40040, Sept. 29, 1989]