Regulationcurrent
Mich. Admin. Code R 460.20307
Welding preheating
Current as of 2026-05-04 Government source
Michigan Public Service CommissionOfficial agency material
View source Rule 307. In addition to the requirements contained in 49 C.F.R.§192.235, which is adopted by reference in R 460.20606, if preheating is required, then an operator shall monitor the preheat temperature to ensure that the required preheat temperature is reached before beginning, and is maintained during, the welding operation.#
History: 1998-2000 AACS.#