“TINHORN CULVERT CORRUGATED METAL PIPE PLASTIC STEEL”

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In the picture above, we replaced a single 36″ cmp with 1-36″ n-12 and 2-30″ n-12 on 2% grade, and increased the flow 5X!

      2021    FLOW CHART GPM’S   GPM’S   GPM’S
pcs Dia. CMP Grade .01% Grade 1.5% C.F.S. @ 1.5% Grade 2% C.F.S. @ 2% Grade 2.5 %
    n-12 DW 20′ = 0″ 20′ = 3.6″   20′ = 4.8″   20′ = 6″
1 12″ cmp 123 gpm 1500 gpm 3.34 1733 gpm 3.86 1938 gpm
1 12″ n-12 173 gpm 2125 gpm 4.74 2455 gpm 5.47 2745 gpm
1 15″ cmp 187 gpm 2312 gpm 5.15 2676 gpm 5.96 2989 gpm
1 15″ n-12 314 gpm 3859 gpm 8.6 4454 gpm 9.92 4982 gpm
1 18″ cmp 309 gpm 3758 gpm 8.37 4344 gpm 9.68 4851 gpm
1 18″ n-12 515 gpm 6271 gpm 14 7238 gpm 16.13 8094 gpm
1 21″ cmp 464 gpm 5676 gpm 12.65 6550 gpm 14.59 7227 gpm
1 24″ cmp 663 gpm 8104 gpm 18 9358 gpm 20.85 10457 gpm
1 24″ n-12 1099 gpm 13501 gpm 30 15587 gpm 34.73 17419 gpm
1 30″ cmp 1189 gpm 14688 gpm 32.73 16956 gpm 37.78 18960 gpm
1 30″ n-12 2004 gpm 24465 gpm 54.51 28253 gpm 62.95 31600 gpm
1 36″ cmp 1934 gpm 23877 gpm 53 27587 gpm 61 30822 gpm
1 36″ n-12 3234 gpm 39796 gpm 89 45947 gpm 102 51370 gpm
1 42″ cmp 2935 gpm 36039 gpm 80.3 41607 gpm 92.7 46527 gpm
1 42″ n-12 4921 gpm 60036 gpm 133.76 69316 gpm 154.44 77517 gpm
1 48″ cmp 4228 gpm 51412 gpm 114.55 59417 gpm 132.38 66407 gpm
1 48″ n-12 6990 gpm 85743 gpm 191 98991 gpm 220.55 110660 gpm
1 60″ cmp 7575 gpm 93280 gpm 207.83 107726 gpm 240 120409 gpm
1 60″ n-12 12684 gpm 155466 gpm 346.38 179513 gpm 400 200653 gpm
1 72″ cmp 12430 gpm 151700 gpm 338 175165 gpm 390 195840 gpm
1 84″ cmp 18645 gpm 228751 gpm 510 264143 588 295391 gpm
1 96″ cmp 26608 gpm 326738 gpm 728 377248 840 421670 gpm
1 108″ cmp 36530 gpm 447204 gpm 996 516553 1151 577341 gpm
1 120″ cmp 468269 gpm 592269 gpm 1320 683875 gpm 1524 764560 gpm

Legend:

cmp = corrugated metal pipe,  requires 2.5% minimum grade for proper installation.

n-12 = n-12 double wall polyethylene pipe, n-12 recommended minimum grade is 2%.

gpm = gallons per minute.

c.f.s. = cubic feet per second.

How important is setting the pipe on the proper grade?

Compare the volume (gpm) between 0% grade vs. the recomended grade to see the results.

Note: Maximum performance result from proper installation, which requires setting the pipe at the minimum recomended grades.

In the picture above, we replaced a single 36″ cmp with 1-36″ and 2-30″ on 2% grade,and increased the flow 5X!

Please use the flow chart tool to take advantage of the potential to install your pipe for maximum performance.

 

 

 

 

“TINHORN CULVERT CORRUGATED METAL PIPE PLASTIC STEEL”