49 CFR Part 238, Appendix D to Part 238 - Requirements for External Fuel Tanks on Tier I Locomotives

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There is 1 rule appearing in the Federal Register for 49 CFR 238. View below or at eCFR (GPOAccess)
View PDF at GPO Pt. 238, App. D
Appendix D to Part 238—Requirements for External Fuel Tanks on Tier I Locomotives
The requirements contained in this appendix are intended to address the structural and puncture resistance properties of the locomotive fuel tank to reduce the risk of fuel spillage to acceptable levels under derailment and minor collision conditions.
(a) Structural strength—(1) Load case 1—minor derailment. The end plate of the fuel tank shall support a sudden loading of one-half the weight of the car body at a vertical acceleration of 2g, without exceeding the ultimate strength of the material. The load is assumed to be supported on one rail, within an eight inch band (plus or minus) at a point nominally above the head of the rail, on tangent track. Consideration should be given in the design of the fuel tank to maximize the vertical clearance between the top of the rail and the bottom of the fuel tank.
(2) Load case 2—jackknifed locomotive. The fuel tank shall support transversely at the center a sudden loading equivalent to one half the weight of the locomotive at a vertical acceleration of 2g, without exceeding the ultimate strength of the material. The load is assumed to be supported on one rail, distributed between the longitudinal center line and the edge of the tank bottom, with a rail head surface of two inches.
(3) Load case 3—side impact. In a side impact collision by an 80,000 pound Gross Vehicle Weight tractor/trailer at the longitudinal center of the fuel tank, the fuel tank shall withstand, without exceeding the ultimate strength, a 200,000 pound load (2.5g) distributed over an area of six inches by forty-eight inches (half the bumper area) at a height of thirty inches above the rail (standard DOT bumper height).
(4) Load case 4—penetration resistance. The minimum thickness of the sides, bottom sheet and end plates of the fuel tank shall be equivalent to a 5/16-inch steel plate with a 25,000 pounds-per-square-inch yield strength (where the thickness varies inversely with the square root of yield strength). The lower one third of the end plates shall have the equivalent penetration resistance by the above method of a 3/4-inch steel plate with a 25,000 pounds-per-square-inch yield strength. This may be accomplished by any combination of materials or other mechanical protection.
(b) Sideswipe. To minimize fuel tank damage during sideswipes (railroad vehicles and grade crossings), all drain plugs, clean-out ports, inspection covers, sight glasses, gauge openings, etc., must be flush with the tank surface or adequately protected to avoid catching foreign objects or breakage. All seams must be protected or flush to avoid catching foreign objects.
(c) Spill controls. Vents and fills shall be designed to avert spillage of fuel in the event of a roll over.

Title 49 published on 2013-10-01

The following are only the Rules published in the Federal Register after the published date of Title 49.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2013-11-29; vol. 78 # 230 - Friday, November 29, 2013
    1. 78 FR 71786 - Passenger Train Emergency Systems II
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Federal Railroad Administration
      Final rule.
      This final rule is effective January 28, 2014. The incorporation by reference of certain publications listed in the rule is approved by the Director of the Federal Register as of January 28, 2014. Petitions for reconsideration must be received on or before January 28, 2014. Comments in response to petitions for reconsideration must be received on or before March 14, 2014.
      49 CFR Parts 238 and 239

Title 49 published on 2013-10-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 49 CFR 238 after this date.

  • 2014-03-26; vol. 79 # 58 - Wednesday, March 26, 2014
    1. 79 FR 16978 - Passenger Train Exterior Side Door Safety
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Federal Railroad Administration
      Notice of proposed rulemaking (NPRM).
      Written comments must be received by May 27, 2014. Comments received after that date will be considered to the extent possible without incurring additional expense or delay. FRA anticipates being able to resolve this rulemaking without a public, oral hearing. However, if FRA receives a specific request for a public, oral hearing prior to April 25, 2014, one will be scheduled and FRA will publish a supplemental notice in the Federal Register to inform interested parties of the date, time, and location of any such hearing.
      49 CFR Part 238