雙(shuang)壁纖(xian)(xian)維(wei)網鋼(gang)骨架復合(he)(he)管(guan)以(yi)聚乙(yi)烯（PE）樹脂為(wei)(wei)(wei)原材料，采用(yong)雙(shuang)層(ceng)共(gong)擠工(gong)藝成型為(wei)(wei)(wei)內(nei)(nei)壁藍色(se)、外壁黑色(se)的內(nei)(nei)層(ceng)“凹”形中(zhong)空板帶，用(yong)鍍鋅鋼(gang)帶軋制成型為(wei)(wei)(wei)“Ω”形的鋼(gang)骨架機械(xie)卡扣(kou)在“凹”形中(zhong)空板帶中(zhong)作為(wei)(wei)(wei)主要支(zhi)撐結(jie)構，外壁用(yong)纖(xian)(xian)維(wei)網（玄武巖纖(xian)(xian)維(wei)或玻璃纖(xian)(xian)維(wei)）增強的復合(he)(he)聚乙(yi)烯層(ceng)，使用(yong)纏繞(rao)成型工(gong)藝，加(jia)工(gong)制成內(nei)(nei)壁平直(zhi)光滑、外壁呈(cheng)螺(luo)旋波紋(wen)狀的雙(shuang)壁纖(xian)(xian)維(wei)網鋼(gang)骨架復合(he)(he)管(guan)（簡稱“DFSP”管(guan)道）。