自應(ying)力(li)(li)(li)鋼筋混凝土(tu)壓(ya)力(li)(li)(li)管(guan)(guan)有(you)平(ping)口式管(guan)(guan)和承插(cha)式管(guan)(guan)兩種，已成功(gong)地用(yong)(yong)(yong)(yong)于(yu)輸送水、煤氣和熱電(dian)廠粉煤灰等。它與鑄鐵管(guan)(guan)相比(bi)、有(you)下(xia)列優點：①. 剛久性好。據介紹，這種管(guan)(guan)道在地下(xia)可(ke)使(shi)用(yong)(yong)(yong)(yong)80年(nian)以上(shang)。②. 不(bu)導電(dian)。能避免雜散電(dian)流(liu)對(dui)管(guan)(guan)線的腐蝕。③. 熱導率低(di)。外界溫度(du)變化對(dui)管(guan)(guan)內影響(xiang)小。④. 長期輸水內表面不(bu)長銹瘤、通水能力(li)(li)(li)不(bu)變。⑤. 有(you)裂縫閉(bi)(bi)合和愈合之能力(li)(li)(li)。若出現寬(kuan)度(du)小于(yu)0.25mm裂紋，在自壓(ya)應(ying)力(li)(li)(li)作用(yong)(yong)(yong)(yong)下(xia)能閉(bi)(bi)合，通常仍可(ke)作壓(ya)力(li)(li)(li)為0.6MPa以內的輸水管(guan)(guan)使(shi)用(yong)(yong)(yong)(yong)。⑥. 鋪設簡便(bian)(bian)。⑦. 接頭密封性好，使(shi)用(yong)(yong)(yong)(yong)可(ke)靠(kao)。⑧. 價(jia)格便(bian)(bian)宜。

  缺點(dian)是：①. 自重大；②. 性(xing)脆、易斷；③. 當(dang)輸送含有(you)面(mian)體顆粒的(de)介(jie)質(zhi)時(shi)，耐磨性(xing)不及鑄鐵(tie)管。