自應力(li)(li)鋼筋混凝土壓(ya)力(li)(li)管(guan)(guan)(RCCP管(guan)(guan))有平口式管(guan)(guan)和(he)承插式管(guan)(guan)兩種,已成功地用于輸(shu)送水(shui)、煤氣和(he)熱(re)電廠粉(fen)煤灰等。它與鑄(zhu)鐵管(guan)(guan)相比(bi)有下(xia)(xia)列優點:剛性(xing)好(hao),據(ju)介紹,這(zhe)種管(guan)(guan)道(dao)在地下(xia)(xia)可(ke)(ke)(ke)使(shi)用80年(nian)以上;不導電,能(neng)避免雜散電流對管(guan)(guan)線(xian)的腐蝕;熱(re)導率低,外界溫度變化(hua)對管(guan)(guan)內影響小;長(chang)期輸(shu)水(shui)內表面不長(chang)銹瘤,通(tong)水(shui)能(neng)力(li)(li)不變;有裂縫閉合(he)和(he)愈合(he)能(neng)力(li)(li),若出現寬(kuan)度小于0.25mm裂紋(wen),在自壓(ya)應力(li)(li)作(zuo)用下(xia)(xia)能(neng)閉合(he),通(tong)常仍可(ke)(ke)(ke)作(zuo)壓(ya)力(li)(li)為0.6MPa以內的輸(shu)水(shui)管(guan)(guan)使(shi)用;鋪設簡(jian)便;接頭密封(feng)性(xing)好(hao),使(shi)用可(ke)(ke)(ke)靠;價格便宜(yi)。缺點是:自重(zhong)大;性(xing)脆(cui)、易斷;當輸(shu)送含有面體顆粒的介質時,耐磨性(xing)不及鑄(zhu)鐵管(guan)(guan)。RCCP管(guan)(guan)的參考標(biao)準有AWWA C302、AWWA C303等。