46 CFR § 188.10-21 - Compressed gas.

---
identifier: "/us/cfr/t46/s188.10-21"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 188.10-21 - Compressed gas."
title_number: 46
title_name: "Shipping"
section_number: "188.10-21"
section_name: "Compressed gas."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "U"
subchapter_name: "OCEANOGRAPHIC RESEARCH VESSELS"
part_number: "188"
part_name: "GENERAL PROVISIONS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "6 U.S.C. 2103, 2113, 3306; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277, sec. 1-105; DHS Delegation No. 00170.1, Revision No. 01.4."
regulatory_source: "CGFR 67-83, 33 FR 1113, Jan. 27, 1968, unless otherwise noted."
cfr_part: "188"
---


# 188.10-21 Compressed gas.

This term includes any material or mixture having in the container an absolute pressure exceeding 40 p.s.i. at 70 °F.; or regardless of the pressure at 70 °F., having an absolute pressure exceeding 104 p.s.i. at 130 °F.; or any liquid flammable material having a vapor pressure exceeding 40 p.s.i. absolute at 100 °F. as determined by the Reid method covered by the American Society for Testing Materials Method of Test for Vapor Pressure of Petroleum Products (D-323). Compressed gases are discussed in more detail in 49 CFR parts 171-179.

[CGFR 67-83, 33 FR 1113, Jan. 27, 1968, as amended by CGD 86-033, 53 FR 36026, Sept. 16, 1988]