DN1200雙線供水

供水(shui)(shui)管(guan)(guan)(guan)網的布置有枝(zhi)狀和(he)環狀兩種基(ji)本(ben)形(xing)(xing)(xing)式。前者(zhe)干(gan)管(guan)(guan)(guan)和(he)支管(guan)(guan)(guan)分明(ming)，形(xing)(xing)(xing)成樹枝(zhi)狀；后者(zhe)管(guan)(guan)(guan)道(dao)縱橫相互(hu)接通形(xing)(xing)(xing)成環狀。供水(shui)(shui)管(guan)(guan)(guan)網由眾多水(shui)(shui)管(guan)(guan)(guan)連接而成，水(shui)(shui)管(guan)(guan)(guan)材(cai)料可分非金屬管(guan)(guan)(guan)（鋼(gang)筋混(hun)凝土管(guan)(guan)(guan)、塑料管(guan)(guan)(guan)、加強玻(bo)璃(li)纖維管(guan)(guan)(guan)、鋼(gang)塑復合管(guan)(guan)(guan)、鋼(gang)套筒預應力(li)鋼(gang)筋混(hun)凝土管(guan)(guan)(guan)等）和(he)金屬管(guan)(guan)(guan)（鑄鐵管(guan)(guan)(guan)、球墨鑄鐵管(guan)(guan)(guan)、鋼(gang)管(guan)(guan)(guan)等）。