StacksVerified U.S. regulatory reference

49 CFR §230.59

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
If boilers are equipped with fusible plugs, the plugs shall be removed and cleaned of scale each time the boiler is washed but not less frequently than during every 31 service day inspection. Their removal shall be noted on the FRA Form No. 1 or FRA Form No. 3. (See appendix B of this part.)