國家現行標(biao)準CJJ／T 28《城鎮(zhen)供熱(re)管(guan)(guan)網工(gong)程施(shi)工(gong)及驗(yan)收(shou)規范(fan)》適用于(yu)采用明挖(wa)、暗挖(wa)、頂管(guan)(guan)、定向(xiang)鉆(zhan)等(deng)施(shi)工(gong)工(gong)藝(yi)，并(bing)符合(he)下列參數的城鎮(zhen)供熱(re)管(guan)(guan)網工(gong)程的施(shi)工(gong)及驗(yan)收(shou)：

  工(gong)作(zuo)壓力小(xiao)于或(huo)(huo)等于1.6MPa，介(jie)質溫度(du)小(xiao)于或(huo)(huo)等于350℃的蒸汽管(guan)網(wang)(wang)；工(gong)作(zuo)壓力小(xiao)于或(huo)(huo)等于2.5MPa，介(jie)質溫度(du)小(xiao)于或(huo)(huo)等于200℃的熱水管(guan)網(wang)(wang)。