---
kind: "section"
citation: "33 C.F.R. § 154.2113"
title: "33"
number: "154.2113"
heading: "Alkylene oxides—Special requirements."
url: "https://uscodex.org/cfr/33/154.2113"
---

# §154.2113. Alkylene oxides—Special requirements.


A vapor control system (VCS) that controls vapors of an alkylene oxide, except for carriage under [46 CFR part 151](/cfr/46/part151.md) (listed in Table 151.05 with “Pressure” entry in the “Cargo identification, Pressure, b” column), must comply with paragraphs [(a)](#a) and [(b)](#b) of this section.

- (a)
  - (1) The VCS's equipment, hoses, piping, and all piping components, including valves, flanges, and fittings, must be of a type and constructed out of materials suitable for use with alkylene oxide;
  - (2) The VCS used for collecting an alkylene oxide vapor must not be used for collecting other vapors and must be separated from any other VCS, except as specified by [paragraph (b)](#b) of this section; and
- (b) The VCS must be adequately cleaned in accordance with [33 CFR 154.2150(p)](/cfr/33/154.2150.md?p=p) and either recertified by a certifying entity or approved by a marine chemist if—
  - (1) The VCS is used to control other vapors; or
  - (2) **The VCS is returned to alkylene oxide service after being used to control other cargo vapors.**

## Notes

### Source

Source: USCG-1999-5150, 78 FR 42618, July 16, 2013, unless otherwise noted.

### Authority

Authority: 33 U.S.C. 1321(j)(1)(C), (j)(5), (j)(6), and (m)(2); 46 U.S.C. 70011, 70034; sec. 2, E.O. 12777, 56 FR 54757; Department of Homeland Security Delegation No. 00170.1, Revision No. 01.2. Subpart F is also issued under 33 U.S.C. 2735. Vapor control recovery provisions of Subpart P are also issued under 42 U.S.C. 7511b(f)(2).