在施工历程中施工单元每每漏算钢丝网骨架塑料复合管的电熔三通应该加个相应规格电熔套筒,
| 公称直径/mm | D/mm | ∮/mm | L3/mm | L1/mm | L2/mm |
| 32*32*32 | 47 | 32 | 110 | 70 | 37.5 |
| 40*40*40 | 56.2 | 40 | 128 | 80 | 43.5 |
| 50*50*50 | 69.4 | 50 | 148 | 94 | 46.5 |
| 63*63*63 | 83.5 | 63 | 179 | 125 | 57.5 |
| 90*90*90 | 117 | 90 | 225 | 137 | 68.5 |
| 110*110*110 | 152 | 110 | 256 | 162 | 78.5 |
| 63*63*40 | 85 |
