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 178.338 only, with the same insulation system.