49 CFR § 179.220-3 - Type.
---
identifier: "/us/cfr/t49/s179.220-3"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 179.220-3 - Type."
title_number: 49
title_name: "Transportation"
section_number: "179.220-3"
section_name: "Type."
chapter_name: "PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "C"
subchapter_name: "HAZARDOUS MATERIALS REGULATIONS"
part_number: "179"
part_name: "SPECIFICATIONS FOR TANK CARS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 5101-5128; 49 CFR 1.81 and 1.97."
regulatory_source: "29 FR 18995, Dec. 29, 1964, unless otherwise noted. Redesignated at 32 FR 5606, Apr. 5, 1967."
cfr_part: "179"
---
# 179.220-3 Type.
(a) Tanks built under these specifications must consist of an inner container, a support system for the inner container, and an outer shell.
(b) The inner container must be a fusion welded tank of circular cross section with formed heads designed convex outward and must have a manway on top of the tank as prescribed herein. When the inner container is divided into compartments, each compartment must be considered a separate container.
(c) The outer shell must be a fusion welded tank with formed heads designed convex outward.
[Amdt. 179-9, 36 FR 21340, Nov. 6, 1971]