CFR › Title 46 › Part 197 › §197.33646 CFR §197.336Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkPiping systems that are not an integral part of the vessel or facility, carrying fluids under pressures exceeding 15 psig must—(a)Meet the ANSI Code;(b)Have the point of connection to the integral piping system of the vessel or facility clearly marked; and(c)Be tested after every repair, modification, or alteration to the pressure boundaries as set forth in § 197.462.