---
kind: "section"
citation: "49 C.F.R. § 192.475"
title: "49"
number: "192.475"
heading: "Internal corrosion control: General."
url: "https://uscodex.org/cfr/49/192.475"
---

# §192.475. Internal corrosion control: General.

- (a) Corrosive gas may not be transported by pipeline, unless the corrosive effect of the gas on the pipeline has been investigated and steps have been taken to minimize internal corrosion.
- (b) Whenever any pipe is removed from a pipeline for any reason, the internal surface must be inspected for evidence of corrosion. If internal corrosion is found—
  - (1) The adjacent pipe must be investigated to determine the extent of internal corrosion;
  - (2) Replacement must be made to the extent required by the applicable paragraphs of §§ [192.485](/cfr/49/192.485.md), [192.487](/cfr/49/192.487.md), or [192.489](/cfr/49/192.489.md); and
  - (3) Steps must be taken to minimize the internal corrosion.
- (c) Gas containing more than 0.25 grain of hydrogen sulfide per 100 cubic feet (5.8 milligrams/m .3) at standard conditions (4 parts per million) may not be stored in pipe-type or bottle-type holders.

## Notes

### Amendments

[Amdt. 192-4, 36 FR 12302, June 30, 1971, as amended by Amdt. 192-33, 43 FR 39390, Sept. 5, 1978; Amdt. 192-78, 61 FR 28785, June 6, 1996; Amdt. 192-85, 63 FR 37504, July 13, 1998]

### Source

Source: Amdt. 192-4, 36 FR 12302, June 30, 1971, unless otherwise noted.

### Authority

Authority: 30 U.S.C. 185(w)(3), 49 U.S.C. 5103, 60101 et. seq., and 49 CFR 1.97.

### Source

Source: 35 FR 13257, Aug. 19, 1970, unless otherwise noted.

### Amendments

[Amdt. 192-4, 36 FR 12302, June 30, 1971, as amended by Amdt. 192-33, 43 FR 39390, Sept. 5, 1978; Amdt. 192-78, 61 FR 28785, June 6, 1996; Amdt. 192-85, 63 FR 37504, July 13, 1998]