---
kind: "section"
citation: "49 C.F.R. § 179.2"
title: "49"
number: "179.2"
heading: "Definitions and abbreviations."
url: "https://uscodex.org/cfr/49/179.2"
---

# §179.2. Definitions and abbreviations.

- (a) **The following apply in part 179—**
  - (1) AAR means Association of American Railroads.
  - (2) Approved means approval by the AAR Tank Car Committee.
  - (3) ASTM means American Society for Testing and Materials.
  - (4) [Reserved]
  - (5) **Definitions in part 173 of this chapter also apply.**
  - (6) F means degrees Fahrenheit.
  - (7) NGT means National Gas Taper Threads.
  - (8) NPT means an American Standard Taper Pipe Thread conforming to the requirements of NBS Handbook H-28 (IBR, see [§ 171.7](/cfr/49/171.7.md) of this subchapter).
  - (9) [Reserved]
  - (10) Tank car facility means an entity that manufactures, repairs, inspects, tests, qualifies, or maintains a tank car to ensure that the tank car conforms to this part and [subpart F of part 180](/cfr/49/part180-subpartF.md) of this subchapter, that alters the certificate of construction of the tank car, that ensures the continuing qualification of a tank car by performing a function prescribed in parts [179](/cfr/49/part179.md) or [180](/cfr/49/part180.md) of this subchapter, or that makes any representation indicating compliance with one or more of the requirements of parts [179](/cfr/49/part179.md) or [180](/cfr/49/part180.md) of this subchapter.
  - (11) Tanks means tank car tanks.
- (b) [Reserved]

## Notes

### Amendments

[29 FR 18995, Dec. 20, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967, and amended by Amdt. 179-10, 36 FR 21344, Nov. 6, 1971; Amdt. 179-50, 60 FR 49076, Sept. 21, 1995; Amdt. 179-50, 61 FR 33255, June 26, 1996; 63 FR 52850, Oct. 1, 1998; 66 FR 45186, 45390, Aug. 28, 2001; 68 fR 75759, Dec. 31, 2003]

### Authority

Authority: 49 U.S.C. 5101-5128; 49 CFR 1.81 and 1.97.

### Source

Source: 29 FR 18995, Dec. 29, 1964, unless otherwise noted. Redesignated at 32 FR 5606, Apr. 5, 1967.

### Amendments

[29 FR 18995, Dec. 20, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967, and amended by Amdt. 179-10, 36 FR 21344, Nov. 6, 1971; Amdt. 179-50, 60 FR 49076, Sept. 21, 1995; Amdt. 179-50, 61 FR 33255, June 26, 1996; 63 FR 52850, Oct. 1, 1998; 66 FR 45186, 45390, Aug. 28, 2001; 68 fR 75759, Dec. 31, 2003]