StacksVerified U.S. regulatory reference

49 CFR §229.107

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Each steam generator shall have an illuminated steam gauge that correctly indicates the pressure. The steam pressure gauge shall be graduated to not less than one and one-half times the allowed working pressure of the steam generator.
  2. (b)Each steam pressure gauge on a steam generator shall have a siphon that prevents steam from entering the gauge. The pipe connection shall directly enter the separator and shall be steam tight between the separator and the gauge.