เหล็กท่อกลม  (Carbon Steel Pipes)

ขนาด (นิ้ว)                  ขนาด OD (มม.)              ความหนา (มม.)

1/2”(4หุน)                     19.6                           1.5

3/4”(6หุน)                     25.4                           1.5

1”                                   31.8                          1.5-2.3

11/4”                             41.3                          1.5-2.3

11/2”                             45.7                          1.5-2.3

2”                                    58.5                         1.5-2.3

3”                                    89.10                       2.3-3.2

4”                                    114.30                     2.3-3.2