Federal regulations · Through 2026-08-25 · Newer source version available

49 CFR 179.201-1: -1 Individual specification requirements.

In addition to § 179.200, the individual specification requirements are as follows:
DOT Specification 1 Insulation Bursting pressure (psig) Minimum plate thickness (inches) Test pressure (psig) Bottom outlet Bottom washout References (179.201 - ***)
111A60ALW1 Optional 240 1⁄2 60 Optional Optional 6(a).
111A60ALW2 Optional 240 1⁄2 60 No Optional.
111A60W1 Optional 240 7⁄16 60 Optional Optional 6(a).
111A60W2 Optional 240 7⁄16 60 No Optional.
111A60W5 Optional 240 7⁄16 60 No No 3, 6(b).
111A60W6 Optional 240 7⁄16 60 Optional Optional 4, 5, 6(a), 6(c).
111A60W7 Optional 240 7⁄16 60 No No 4, 5, 6(a).
111A100ALW1 Optional 500 5⁄8 100 Optional Optional 6(a).
111A100ALW2 Optional 500 5⁄8 100 No Optional.
111A100W1 Optional 500 7⁄16 100 Optional Optional 6(a).
111A100W2 Optional 500 7⁄16 100 No Optional.
111A100W3 Yes 500 7⁄16 100 Optional Optional 6(a).
111A100W4 Yes (see 179.201-11) 500 7⁄16 100 No No 6(a), 8, 10.
111A100W5 Optional 500 7⁄16 100 No No 3.
111A100W6 Optional 500 7⁄16 100 Optional Optional 4, 5, 6(a) and 6(c).
111A100W7 Optional 500 7⁄16 100 No No 4, 5, 6(c).
1 Tanks marked “ALW” are constructed from aluminum alloy plate; “AN” nickel plate; “CW,” “DW,” “EW,” “W6,” and “W7” high alloy steel or manganese-molybdenum steel plate; and those marked “BW” or “W5” must have an interior lining that conforms to § 179.201-3.

Where this section sits in the code

Title 49—Transportation
Subtitle B—Other Regulations Relating to Transportation
CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
SUBCHAPTER C—HAZARDOUS MATERIALS REGULATIONS
PART 179—SPECIFICATIONS FOR TANK CARS
Subpart D—Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)

In addition to § 179.200, the individual specification requirements are as follows:

DOT Specification 1 Insulation Bursting pressure (psig) Minimum plate thickness (inches) Test pressure (psig) Bottom outlet Bottom washout References (179.201 - ***)

111A60ALW1 Optional 240 1⁄2 60 Optional Optional 6(a).

111A60ALW2 Optional 240 1⁄2 60 No Optional.

111A60W1 Optional 240 7⁄16 60 Optional Optional 6(a).

111A60W2 Optional 240 7⁄16 60 No Optional.

111A60W5 Optional 240 7⁄16 60 No No 3, 6(b).

111A60W6 Optional 240 7⁄16 60 Optional Optional 4, 5, 6(a), 6(c).

111A60W7 Optional 240 7⁄16 60 No No 4, 5, 6(a).

111A100ALW1 Optional 500 5⁄8 100 Optional Optional 6(a).

111A100ALW2 Optional 500 5⁄8 100 No Optional.

111A100W1 Optional 500 7⁄16 100 Optional Optional 6(a).

111A100W2 Optional 500 7⁄16 100 No Optional.

111A100W3 Yes 500 7⁄16 100 Optional Optional 6(a).

111A100W4 Yes (see 179.201-11) 500 7⁄16 100 No No 6(a), 8, 10.

111A100W5 Optional 500 7⁄16 100 No No 3.

111A100W6 Optional 500 7⁄16 100 Optional Optional 4, 5, 6(a) and 6(c).

111A100W7 Optional 500 7⁄16 100 No No 4, 5, 6(c).

1 Tanks marked “ALW” are constructed from aluminum alloy plate; “AN” nickel plate; “CW,” “DW,” “EW,” “W6,” and “W7” high alloy steel or manganese-molybdenum steel plate; and those marked “BW” or “W5” must have an interior lining that conforms to § 179.201-3.

Collected 2026-08-27T02:26:34Z. Source file · JSON

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