Design type
Design type means one or more cargo tanks that are made -
(1) To the same specification;
(2) By the same manufacturer;
(3) To the same engineering drawings and calculations, except for minor variations in piping that do not affect the lading retention capability of the cargo tank;
(4) Of the same materials of construction;
(5) To the same cross-sectional dimensions;
(6) To a length varying by no more than 5 percent;
(7) With the volume varying by no more than 5 percent (due to a change in length only); and
(8) For the purposes of ยง 178.338 only, with the same insulation system.
Source
49 CFR § 178.320
Scoping language
Definitions. For the purpose of this subchapter: