Michigan Administrative Code
Department - Licensing and Regulatory Affairs
Public Service Commission
Michigan Gas Safety Standards
Part 4 - SOUR GAS PIPELINES
Section R. 460.20417 - Internal corrosion control; monitoring

Rule 417. In addition to the requirements set forth in 49 C.F.R.§192.477, which is adopted by reference in R 460.20606, an operator of pipeline facilities used in the transportation of sour gas shall use coupons or other suitable means to determine the effectiveness of the steps taken to minimize internal corrosion. Initially, each coupon or other means of monitoring internal corrosion shall be checked 4 times each calendar year, but with intervals of not more than 3 1/2 months until a monitoring schedule can be developed that will adequately identify internal corrosion. The monitoring schedule shall not exceed the schedule set forth in 49 C.F.R. §192.477.