# Valve maintenance; sour gas pipelines

- **operation:** document
- **citation:** Mich. Admin. Code R 460.20431
- **title:** Valve maintenance; sour gas pipelines
- **source type:** regulation
- **agency:** Michigan Public Service Commission
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** 2026-05-04
- **summary:** Rule 431. In addition to the requirements set forth in 49 C.F.R.§192.745, which is adopted by reference in R 460.20606, an operator of pipeline facilities used in the transportation of sour gas shall inspect and partially operate each pipeline valve that might be required during an emergency at inte
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**body:**

Rule 431. In addition to the requirements set forth in 49 C.F.R.§192.745, which is adopted by reference in R 460.20606, an operator of pipeline facilities used in the transportation of sour gas shall inspect and partially operate each pipeline valve that might be required during an emergency at intervals of not more than 7 1/2 months, but not less than twice each calendar year.

History: 2003 AACS. PART 5. RECORDS AND REPORTS
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