CFR›Title 46›Chapter I›Part 164›Subpart 164.139 ContainsSections 164.139-1–164.139-4CorpusDaily eCFRDisplayed edition2026-06-04Last updated2026-06-04 Subpart 164.139-Dampers Sections 164.139-1 § 164.139-1 Scope. 164.139-2 § 164.139-2 Incorporation by reference. 164.139-3 § 164.139-3 Testing, marking, and inspection requirements. 164.139-4 § 164.139-4 Approval procedures. SourceUSCG-2012-0196, 81 FR 48289, July 22, 2016, unless otherwise noted. Previous 164.138 Subpart 164.138—Fire Stops (Penetration Seals) Next 164.141 Subpart 164.141—Plastic Pipes