61:08:09:07Internal inspection -- Openings.
Section · Administrative Rules of South Dakota · View on sdlegislature.gov ↗
The inspector shall examine all openings into a boiler for evidence of defects. If possible, the openings for water glass connections, safety valves, steam gauges, blowoff valves, and fusible soft plugs must be inspected during each internal inspection.
Source: 23 SDR 139, effective March 5, 1997.