StacksVerified U.S. regulatory reference

49 CFR §179.103-2

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)The manway cover must be an approved design.
  2. (b)If no valves or measuring and sampling devices are mounted on manway cover, no protective housing is required.