49 CFR 179.220-6 - Thickness of plates.

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There is 1 rule appearing in the Federal Register for 49 CFR 179. View below or at eCFR (GPOAccess)
§ 179.220-6 Thickness of plates.
(a) The wall thickness, after forming of the inner container shell and 2:1 ellipsoidal heads must be not less than specified in § 179.221-1, or not less than that calculated by the following formula:
Where:
d = Inside diameter in inches;
E = 0.9 welded joint efficiency; except E=1.0 for seamless heads;
P = Minimum required bursting pressure in psig;
S = Minimum tensile strength of plate material in p.s.i. as prescribed in AAR Specifications for Tank Cars, appendix M, Table M1;
t = Minimum thickness of plate in inches after forming.
(b) The wall thickness after forming of the inner container heads, if flanged and dished, must be not less than specified in § 179.221-1, or not less than that calculated by the following formula:
Where:
E = 0.9 welded joint efficiency; except E=1.0 for seamless heads;
L = Main inside radius to which head is dished, measured on concave side in inches;
P = Minimum required bursting pressure in psig;
S = Minimum tensile strength of plate material in psi as prescribed in AAR Specifications for Tank Cars, appendix M, Table M1 (IBR, see § 171.7 of this subchapter);
t = Minimum thickness of plate in inches after forming.
(c) The wall thickness after forming of the cylindrical section and heads of the outer shell must be not less than seven-sixteenths of an inch.
(d) See § 179.220-9 for plate thickness requirements for inner container when divided into compartments.
[Amdt. 179-9, 36 FR 21340, Nov. 6, 1971, as amended at 66 FR 45390, Aug. 28, 2001; 68 FR 75762, Dec. 31, 2003]

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.

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  • 2013-10-02; vol. 78 # 191 - Wednesday, October 2, 2013
    1. 78 FR 60745 - Hazardous Materials: Minor Editorial Corrections and Clarifications (RRR)
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      DEPARTMENT OF TRANSPORTATION, Pipeline and Hazardous Materials Safety Administration
      Final rule.
      Effective date: October 1, 2013. The incorporation by reference of certain publications listed in the rule was approved by the Director of the Federal Register as of January 7, 2013.
      49 CFR Parts 107, 130, 171, 172, 173, 174, 177, 178, 179, and 180

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United States Code

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 179 after this date.

  • 2014-08-01; vol. 79 # 148 - Friday, August 1, 2014
    1. 79 FR 45016 - Hazardous Materials: Enhanced Tank Car Standards and Operational Controls for High-Hazard Flammable Trains
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      DEPARTMENT OF TRANSPORTATION, Pipeline and Hazardous Materials Safety Administration
      Notice of proposed rulemaking (NPRM).
      Comments must be received by September 30, 2014.
      49 CFR Parts 171, 172, 173, 174, and 179