---
kind: "section"
citation: "49 C.F.R. § 179.102-4"
title: "49"
number: "179.102-4"
heading: "Vinyl fluoride, stabilized."
url: "https://uscodex.org/cfr/49/179.102-4"
---

# §179.102-4. Vinyl fluoride, stabilized.


Each tank used to transport vinyl fluoride, stabilized, must comply with the following special requirements:

- (a) All plates for the tank must be fabricated of material listed in [paragraph (a)(2)](#a-2) of this section, and appurtenances must be fabricated of material listed in paragraph [(a)(1)](#a-1) or [(a)(2)](#a-2) of this section.
  - (1) Stainless steel, ASTM A 240/A 240M (IBR, see [§ 171.7](/cfr/49/171.7.md) of this subchapter), Type 304, 304L, 316 or 316L, in which case impact tests are not required; or
  - (2) Steel complying with ASTM Specification A 516 (IBR, see [§ 171.7](/cfr/49/171.7.md) of this subchapter); Grade 70; ASTM Specification A 537 (IBR, see [§ 171.7](/cfr/49/171.7.md) of this subchapter), Class 1; or AAR Specification TC 128, Grade B, in which case impact tests must be performed as follows:
    - (i) ASTM A 516/A 516M and A 537/A 537M material must meet the Charpy V-Notch test requirements, in longitudinal direction of rolling, of ASTM A 20/A 20M (IBR, see [§ 171.7](/cfr/49/171.7.md) of this subchapter).
    - (ii) AAR Specification TC 128 material must meet the Charpy V-Notch test requirements, in longitudinal direction of rolling, of 15 ft.-lb. minimum average for 3 specimens, with a 10 ft.-lb. minimum for any one specimen, at minus 50 °F or colder, in accordance with ASTM A 370 (IBR, see [§ 171.7](/cfr/49/171.7.md) of this subchapter).
    - (iii) **Production welded test plates must—**
      - (A) Be prepared in accordance with AAR Specifications for Tank Cars, appendix W, W4.00 (IBR, see [§ 171.7](/cfr/49/171.7.md) of this subchapter);
      - (B) Include impact specimens of weld metal and heat affected zone prepared and tested in accordance with AAR Specifications for Tank Cars, appendix W, W9.00; and
      - (C) **Meet the same impact requirements as the plate material.**
- (b) Insulation must be of approved material.
- (c) Excess flow valves must be installed under all liquid and vapor valves, except safety relief valves.
- (d) A thermometer well may be installed.
- (e) Only an approved gaging device may be installed.
- (f) A pressure gage may be installed.
- (g) Aluminum, copper, silver, zinc, or an alloy containing any of these metals may not be used in the tank construction, or in fittings in contact with the lading.
- (h) The jacket must be stenciled, adjacent to the water capacity stencil,
- (i) The tank car and insulation must be designed to prevent the vapor pressure of the lading from increasing from the pressure at the maximum allowable filling density to the start-to-discharge pressure of the reclosing pressure relief valve within 30 days, at an ambient temperature of 90 °F.

## Notes

### Amendments

[Amdt. 179-32, 48 FR 27707, June 16, 1983, as amended at 49 FR 24317, June 12, 1984; 49 FR 42736, Oct. 24, 1984; Amdt. 179-45, 55 FR 52728, Dec. 21, 1990; Amdt. 179-52, 61 FR 28680, June 5, 1996; 65 FR 58632, Sept. 29, 2000; 66 FR 33452, June 21, 2001; 66 FR 45186, 45390, Aug. 28, 2001; 67 FR 51660, Aug. 8, 2002; 68 FR 75758, 75760 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

[Amdt. 179-32, 48 FR 27707, June 16, 1983, as amended at 49 FR 24317, June 12, 1984; 49 FR 42736, Oct. 24, 1984; Amdt. 179-45, 55 FR 52728, Dec. 21, 1990; Amdt. 179-52, 61 FR 28680, June 5, 1996; 65 FR 58632, Sept. 29, 2000; 66 FR 33452, June 21, 2001; 66 FR 45186, 45390, Aug. 28, 2001; 67 FR 51660, Aug. 8, 2002; 68 FR 75758, 75760 Dec. 31, 2003]