Figure: 43 TAC §21.910(c)(4)(E)
Nominal Diameter |
Min. Thickness for Coated (inches) |
Non-Coated |
14 and under |
0.188 |
0.188 |
16 |
0.219 |
0.281 |
18 |
0.250 |
0.312 |
20 and 22 |
0.281 |
0.344 |
24 |
0.312 |
0.375 |
26 |
0.344 |
0.406 |
28 |
0.375 |
0.438 |
30 |
0.406 |
0.469 |
32 |
0.438 |
0.500 |
34 and 36 |
0.469 |
0.531 |
38, 40 and 42 |
0.500 |
0.563 |
44 and 46 |
0.531 |
0.594 |
48 |
0.563 |
0.625 |
50 |
0.594 |
0.656 |
52 |
0.625 |
0.688 |
54 |
0.656 |
0.719 |
56 and 58 |
0.688 |
0.750 |
60 |
0.719 |
0.781 |
62 |
0.750 |
0.813 |
64 |
0.718 |
0.844 |
66 and 68 |
0.813 |
0.875 |
70 |
0.844 |
0.906 |
72 |
0.875 |
0.938 |