在GB50974《消(xiao)防給水及消(xiao)火栓系(xi)統(tong)(tong)技術規范》埋(mai)地管(guan)(guan)(guan)道(dao)，當(dang)(dang)系(xi)統(tong)(tong)工(gong)(gong)(gong)作(zuo)(zuo)壓力(li)(li)(li)不(bu)(bu)大(da)(da)于(yu)(yu)(yu)(yu)(yu)1.20MPa時(shi)，宜采用球墨鑄鐵管(guan)(guan)(guan)或(huo)鋼(gang)(gang)(gang)(gang)絲(si)網(wang)骨架塑料復(fu)合管(guan)(guan)(guan)給水管(guan)(guan)(guan)道(dao)；當(dang)(dang)系(xi)統(tong)(tong)工(gong)(gong)(gong)作(zuo)(zuo)壓力(li)(li)(li)大(da)(da)于(yu)(yu)(yu)(yu)(yu)1.20MPa小于(yu)(yu)(yu)(yu)(yu)1.60MPa時(shi)，宜采用鋼(gang)(gang)(gang)(gang)絲(si)網(wang)骨架塑料復(fu)合管(guan)(guan)(guan)、加(jia)厚鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)和(he)無縫鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)；當(dang)(dang)系(xi)統(tong)(tong)工(gong)(gong)(gong)作(zuo)(zuo)壓力(li)(li)(li)大(da)(da)于(yu)(yu)(yu)(yu)(yu)1.60MPa時(shi)，宜采用無縫鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)。鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)連(lian)接(jie)(jie)(jie)宜采用溝槽(cao)連(lian)接(jie)(jie)(jie)件(jian)（卡箍）和(he)法蘭，當(dang)(dang)采用溝槽(cao)連(lian)接(jie)(jie)(jie)件(jian)連(lian)接(jie)(jie)(jie)時(shi)，公稱直(zhi)徑(jing)小于(yu)(yu)(yu)(yu)(yu)等于(yu)(yu)(yu)(yu)(yu)DN250的溝槽(cao)式管(guan)(guan)(guan)接(jie)(jie)(jie)頭系(xi)統(tong)(tong)工(gong)(gong)(gong)作(zuo)(zuo)壓力(li)(li)(li)不(bu)(bu)應大(da)(da)于(yu)(yu)(yu)(yu)(yu)2.50MPa，公稱直(zhi)徑(jing)大(da)(da)于(yu)(yu)(yu)(yu)(yu)等于(yu)(yu)(yu)(yu)(yu)DN300的溝槽(cao)式管(guan)(guan)(guan)接(jie)(jie)(jie)頭系(xi)統(tong)(tong)工(gong)(gong)(gong)作(zuo)(zuo)壓力(li)(li)(li)不(bu)(bu)應大(da)(da)于(yu)(yu)(yu)(yu)(yu)1.60MPa。


  常用地下管道材(cai)料見(jian)表4-21。


21.jpg


 

  這些材料選用的設計要求，也影響裝置、罐(guan)區的布置。