Pieces of pipes to bundles

Steel pipes (NPS≤ 8) usually be packaged into hexagons as below table: (red numbers are preferred)

NPS

PCS at the edge of the bundle Total PCS in One Bundle Sectional Area (㎡)
1/2 6, 7, 8, 9 91, 127, 169, 217 0.04, 0.06, 0.08, 0.10
3/4 6, 7, 8, 9 91, 127, 169, 217 0.07, 0.09, 0.12, 0.15
1 6, 7, 8, 9 91, 127, 169, 217 0.10, 0.14, 0.18, 0.23
5, 6, 7, 8 61, 91, 127, 169 0.12, 0.17, 0.23, 0.30
5, 6, 7 61, 91, 127 0.15, 0.22, 0.30
2 4, 5, 6 37, 61, 91 0.15, 0.23, 0.34
3, 4, 5 19, 37, 61 0.12, 0.22, 0.34
3 3, 4 19, 37 0.18, 0.33
4 2, 3 7, 19 0.13, 0.30
5 2, 3 7, 19 0.21, 0.47
6 2, 3 7, 19 0.29, 0.66
8 2 7 0.5