49 C.F.R. § 178.347-2 Material and thickness of material.
Title 49 - Transportation
(a) The type and thickness of material for DOT 407 specification cargo tanks must conform to §178.345–2, but in no case may the thickness be less than that determined by the minimum thickness requirements in §178.320(a). Tables I and II identify the specified minimum thickness values to be employed in that the determination: (b) [Reserved] [Amdt. 178–89, 54 FR 25030, June 12, 1989, as amended at 55 FR 37064, Sept. 7, 1990; Amdt. 178–104, 59 FR 49135, Sept. 26, 1994; 68 FR 19285, Apr. 18, 2003]
Title 49: Transportation
PART 178—SPECIFICATIONS FOR PACKAGINGS
Subpart J—Specifications for Containers for Motor Vehicle Transportation
§ 178.347-2 Material and thickness of material.
Table I_Specified Minimum Thickness of Heads (or Bulkheads and Baffles When Used as Tank Reinforcement) Using Mild Steel (MS), High Strength Low Alloy Steel (HSLA), Austenitic Stainless Steel (SS), or Aluminum (AL)_Expressed in Decimals of an Inch After Forming---------------------------------------------------------------------------------------------------------------- 10 or Over 10 Over 14 Over 18 Over 22 Over 26 Volume capacity in gallons per inch less to 14 to 18 to 22 to 26 to 30 Over 30----------------------------------------------------------------------------------------------------------------Thickness (MS)............................ 0.100 0.100 0.115 0.129 0.129 0.143 0.156Thickness (HSLA).......................... 0.100 0.100 0.115 0.129 0.129 0.143 0.156Thickness (SS)............................ 0.100 0.100 0.115 0.129 0.129 0.143 0.156Thickness (AL)............................ 0.160 0.160 0.173 0.187 0.194 0.216 0.237----------------------------------------------------------------------------------------------------------------
Table II_Specified Minimum Thickness of Shell Using Mild Steel (MS), High Strength Low Alloy Steel (HSLA), Austenitic Stainless Steel (SS), or Aluminum (AL)_Expressed in Decimals of an Inch After Forming---------------------------------------------------------------------------------------------------------------- 10 or Over 10 Over 14 Over 18 Over 22 Over 26 Volume capacity in gallons per inch less to 14 to 18 to 22 to 26 to 30 Over 30----------------------------------------------------------------------------------------------------------------Thickness (MS)............................ 0.100 0.100 0.115 0.129 0.129 0.143 0.156Thickness (HSLA).......................... 0.100 0.100 0.115 0.129 0.129 0.143 0.156Thickness (SS)............................ 0.100 0.100 0.115 0.129 0.129 0.143 0.156Thickness (AL)............................ 0.151 0.151 0.160 0.173 0.194 0.216 0.237----------------------------------------------------------------------------------------------------------------
