El tamaño | OD. | ID. | A largo |
La Norma BS | 2'' (50,8 mm) | 1 3/8'' (34,9mm) | 18'' (457mm) o 24'' (610mm) |
ASTM | 2'' (50,8 mm) | 1 4/8'' (38,1 mm) | 18'' (457mm) o 24'' (610mm) |