49 CFR 179.220-22 - Closure for openings.

§ 179.220-22 Closure for openings.
(a) All plugs must be solid, with NPT threads, and must be of a length which will screw at least six threads inside the face of fitting or tank. Plugs, when inserted from the outside of the outer shell tank heads, must have the letter “S” at least three-eighths inch in size stamped with steel stamp or cast on the outside surface to indicate the plug is solid.
(b) Openings in the outer shell used during construction for installation must be closed in an approved manner.
[Amdt. 179-9, 36 FR 21343, Nov. 6, 1971]

Title 49 published on 2014-10-01

no entries appear in the Federal Register after this date.

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United States Code

Title 49 published on 2014-10-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 49 CFR 179 after this date.

  • 2015-01-23; vol. 80 # 15 - Friday, January 23, 2015
    1. 80 FR 3788 - Hazardous Materials: Miscellaneous Amendments (RRR)
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Pipeline and Hazardous Materials Safety Administration
      Notice of Proposed Rulemaking (NPRM).
      Comments must be received by March 24, 2015.
      49 CFR Parts 107, 171, 172, 173, 175, 176, 177, 178, 179 and 180