49 CFR § 192.477 - Internal corrosion control: Monitoring.

---
identifier: "/us/cfr/t49/s192.477"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 192.477 - Internal corrosion control: Monitoring."
title_number: 49
title_name: "Transportation"
section_number: "192.477"
section_name: "Internal corrosion control: Monitoring."
chapter_name: "PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "D"
subchapter_name: "PIPELINE SAFETY"
part_number: "192"
part_name: "TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "30 U.S.C. 185(w)(3), 49 U.S.C. 5103, 60101  and 49 CFR 1.97."
regulatory_source: "35 FR 13257, Aug. 19, 1970, unless otherwise noted."
cfr_part: "192"
---


# 192.477 Internal corrosion control: Monitoring.

If corrosive gas is being transported, coupons or other suitable means must be used to determine the effectiveness of the steps taken to minimize internal corrosion. Each coupon or other means of monitoring internal corrosion must be checked two times each calendar year, but with intervals not exceeding 7
1/2 months.

[Amdt. 192-33, 43 FR 39390, Sept. 5, 1978]