1. 伴管(guan)管(guan)徑(jing)及根數(shu)的選(xuan)用
①. 伴(ban)管管徑(jing)宜(yi)為(wei)10、12、DN15、DN20、DN25，伴(ban)管根數不宜(yi)超(chao)過4根。
②. 在不同環(huan)境(jing)(jing)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)及工藝操作(zuo)條(tiao)件(jian)下(xia)，蒸汽(qi)(qi)伴(ban)(ban)(ban)管(guan)(guan)管(guan)(guan)徑及根數(shu)(shu)從SH／T 3040提(ti)(ti)供的(de)四(si)個表(biao)(biao)（表(biao)(biao)1蒸汽(qi)(qi)伴(ban)(ban)(ban)管(guan)(guan)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)143℃／183℃、環(huan)境(jing)(jing)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)5℃；表(biao)(biao)2蒸汽(qi)(qi)伴(ban)(ban)(ban)管(guan)(guan)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)143℃／183℃、環(huan)境(jing)(jing)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)-5℃；表(biao)(biao)3蒸汽(qi)(qi)伴(ban)(ban)(ban)管(guan)(guan)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)143℃／183℃、環(huan)境(jing)(jing)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)-15℃；表(biao)(biao)4蒸汽(qi)(qi)伴(ban)(ban)(ban)管(guan)(guan)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)143℃／183℃、環(huan)境(jing)(jing)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)-25℃）中(zhong)選擇(ze)；熱水伴(ban)(ban)(ban)管(guan)(guan)管(guan)(guan)徑及根數(shu)(shu)從SH／T 3040提(ti)(ti)供的(de)四(si)個表(biao)(biao)（表(biao)(biao)5蒸汽(qi)(qi)伴(ban)(ban)(ban)管(guan)(guan)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)90℃／100℃／110℃、環(huan)境(jing)(jing)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)5℃；表(biao)(biao)6蒸汽(qi)(qi)伴(ban)(ban)(ban)管(guan)(guan)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du) 90℃／100℃／110℃、環(huan)境(jing)(jing)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)-5℃；表(biao)(biao)7蒸汽(qi)(qi)伴(ban)(ban)(ban)管(guan)(guan)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)90℃／100℃／110℃、環(huan)境(jing)(jing)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)-15℃；表(biao)(biao)8蒸汽(qi)(qi)伴(ban)(ban)(ban)管(guan)(guan)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)90℃／100℃／110℃、環(huan)境(jing)(jing)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)-25℃）中(zhong)選擇(ze)。
③. 環境溫(wen)度(du)、伴管介質(zhi)的操作條件、保溫(wen)材料制品(pin)的熱導率及傳熱系數(shu)等數(shu)據與(yu)表(biao)1～表(biao)8不同時，伴管管徑及根數(shu)（采用硬(ying)質(zhi)或半(ban)硬(ying)質(zhi)圓形保溫(wen)材料制品(pin)）按下面(mian)公式計算。
2. 蒸汽分配站(zhan)和疏水站(zhan)
①. 對于蒸汽(qi)分配站和疏水站的(de)(de)管徑(jing)也給出(chu)了下面的(de)(de)公式，計算出(chu)S值(zhi)，再(zai)查(cha)詢SH3040相(xiang)應的(de)(de)表格來(lai)獲(huo)得蒸汽(qi)分配站和疏水站的(de)(de)管徑(jing)。
S=A+2B+3C 式中A-DN15、612、10伴管(guan)根(gen)(gen)數(shu)；B-DN20伴管(guan)根(gen)(gen)數(shu)；C-DN25伴管(guan)根(gen)(gen)數(shu)。
②. 在(zai)3m半徑范圍內(nei)如有3個或3個以上的(de)伴(ban)熱點(dian)及回收(shou)點(dian)時，蒸(zheng)汽(qi)伴(ban)熱系統應設置(zhi)蒸(zheng)汽(qi)分(fen)配站(zhan)(zhan)(zhan)和疏水(shui)站(zhan)(zhan)(zhan)，熱水(shui)伴(ban)熱系統應設置(zhi)熱水(shui)分(fen)配站(zhan)(zhan)(zhan)和熱水(shui)回水(shui)站(zhan)(zhan)(zhan)。站(zhan)(zhan)(zhan)的(de)設置(zhi)應考(kao)慮(lv)統一考(kao)慮(lv)，布局合理，方(fang)便操作和維修。
3. 蒸(zheng)汽伴管(guan)沿被伴熱管(guan)的最大允許(xu)有效伴熱長度（包括垂直管(guan)道(dao)）（表6-34）
凝結水不(bu)回收(shou)時，最大(da)允許(xu)有效(xiao)伴(ban)(ban)熱長度(du)可延長20％；采用導熱膠(jiao)泥時，最大(da)允許(xu)有效(xiao)伴(ban)(ban)熱長度(du)宜(yi)縮短20％；對于(yu)出現(xian)U形(xing)彎時，在超過規定數值（蒸(zheng)汽壓力0.3～0.5MPa，累計(ji)上(shang)(shang)升(sheng)(sheng)4m；蒸(zheng)汽壓力大(da)于(yu)0.5～0.7MPa，累計(ji)上(shang)(shang)升(sheng)(sheng)5m；蒸(zheng)汽壓力大(da)于(yu)0.7～1MPa，累計(ji)上(shang)(shang)升(sheng)(sheng)6m）時宜(yi)適(shi)當減少最大(da)允許(xu)有效(xiao)伴(ban)(ban)熱長度(du)，但伴(ban)(ban)管累計(ji)上(shang)(shang)升(sheng)(sheng)高度(du)不(bu)宜(yi)超過10m。
注：1. 蒸(zheng)(zheng)(zheng)汽分配(pei)(pei)(pei)站(zhan)安裝(zhuang)位置高于(yu)(yu)蒸(zheng)(zheng)(zheng)汽總(zong)管(guan)時(shi)，分配(pei)(pei)(pei)站(zhan)低(di)點(dian)可不設排放冷凝水(shui)(shui)的(de)蒸(zheng)(zheng)(zheng)汽疏水(shui)(shui)閥系統，水(shui)(shui)平(ping)安裝(zhuang)的(de)分配(pei)(pei)(pei)站(zhan)應(ying)無袋形(xing)并(bing)坡向(xiang)蒸(zheng)(zheng)(zheng)汽總(zong)管(guan)。蒸(zheng)(zheng)(zheng)汽分配(pei)(pei)(pei)站(zhan)低(di)于(yu)(yu)蒸(zheng)(zheng)(zheng)汽總(zong)管(guan)時(shi)，其上游不得(de)有下凹的(de)袋形(xing)彎(wan)，分配(pei)(pei)(pei)站(zhan)的(de)低(di)點(dian)應(ying)設蒸(zheng)(zheng)(zheng)汽疏水(shui)(shui)閥組。
2. 蒸汽(qi)分配站至(zhi)(zhi)少(shao)有(you)3根伴(ban)管(guan)（DN15）送至(zhi)(zhi)半徑為3m范圍內的地點(dian)時才設(she)置，否則伴(ban)熱供汽(qi)管(guan)可(ke)直(zhi)接從蒸汽(qi)總管(guan)上引(yin)出。
3. 分(fen)配站應布置在不妨礙通行(xing)、便于(yu)操作(zuo)的地方，布置應考慮(lv)整齊和美觀。
4. 供汽管的(de)閥門應(ying)布置在便于接近的(de)地方(fang)。
5. 分配站(zhan)的蒸汽應從蒸汽總管的頂部引(yin)出。
4. 熱(re)水伴管沿(yan)被伴熱(re)管的(de)最大允許(xu)有(you)效伴熱(re)長(chang)度（包括垂直管道）（表6-35）
注：按SH／T 3040，應注意(yi)有效(xiao)伴(ban)熱長度(du)和其他(ta)標準規(gui)定(ding)的數值的不同，根據項(xiang)目實際情況選(xuan)用。
注：按 SH／T 3040，應(ying)注意有效伴熱長度和其他標準規定的數值(zhi)的不(bu)同，根據項目實(shi)際(ji)情況選用(yong)。
