1. 伴(ban)管(guan)管(guan)徑及(ji)根數的(de)選(xuan)用(yong)

  ①. 伴管(guan)管(guan)徑宜為10、12、DN15、DN20、DN25，伴管(guan)根數不宜超(chao)過4根。

  ②. 在不同(tong)環(huan)(huan)境(jing)(jing)(jing)溫(wen)(wen)度(du)(du)(du)(du)(du)及(ji)(ji)工藝操作條件(jian)下，蒸(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)(qi)(qi)伴(ban)(ban)管(guan)(guan)(guan)管(guan)(guan)(guan)徑及(ji)(ji)根數(shu)從SH／T 3040提供(gong)的四個(ge)表(biao)(biao)(biao)（表(biao)(biao)(biao)1蒸(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)(qi)(qi)伴(ban)(ban)管(guan)(guan)(guan)溫(wen)(wen)度(du)(du)(du)(du)(du)143℃／183℃、環(huan)(huan)境(jing)(jing)(jing)溫(wen)(wen)度(du)(du)(du)(du)(du)5℃；表(biao)(biao)(biao)2蒸(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)(qi)(qi)伴(ban)(ban)管(guan)(guan)(guan)溫(wen)(wen)度(du)(du)(du)(du)(du)143℃／183℃、環(huan)(huan)境(jing)(jing)(jing)溫(wen)(wen)度(du)(du)(du)(du)(du)-5℃；表(biao)(biao)(biao)3蒸(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)(qi)(qi)伴(ban)(ban)管(guan)(guan)(guan)溫(wen)(wen)度(du)(du)(du)(du)(du)143℃／183℃、環(huan)(huan)境(jing)(jing)(jing)溫(wen)(wen)度(du)(du)(du)(du)(du)-15℃；表(biao)(biao)(biao)4蒸(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)(qi)(qi)伴(ban)(ban)管(guan)(guan)(guan)溫(wen)(wen)度(du)(du)(du)(du)(du)143℃／183℃、環(huan)(huan)境(jing)(jing)(jing)溫(wen)(wen)度(du)(du)(du)(du)(du)-25℃）中選擇；熱水伴(ban)(ban)管(guan)(guan)(guan)管(guan)(guan)(guan)徑及(ji)(ji)根數(shu)從SH／T 3040提供(gong)的四個(ge)表(biao)(biao)(biao)（表(biao)(biao)(biao)5蒸(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)(qi)(qi)伴(ban)(ban)管(guan)(guan)(guan)溫(wen)(wen)度(du)(du)(du)(du)(du)90℃／100℃／110℃、環(huan)(huan)境(jing)(jing)(jing)溫(wen)(wen)度(du)(du)(du)(du)(du)5℃；表(biao)(biao)(biao)6蒸(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)(qi)(qi)伴(ban)(ban)管(guan)(guan)(guan)溫(wen)(wen)度(du)(du)(du)(du)(du) 90℃／100℃／110℃、環(huan)(huan)境(jing)(jing)(jing)溫(wen)(wen)度(du)(du)(du)(du)(du)-5℃；表(biao)(biao)(biao)7蒸(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)(qi)(qi)伴(ban)(ban)管(guan)(guan)(guan)溫(wen)(wen)度(du)(du)(du)(du)(du)90℃／100℃／110℃、環(huan)(huan)境(jing)(jing)(jing)溫(wen)(wen)度(du)(du)(du)(du)(du)-15℃；表(biao)(biao)(biao)8蒸(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)(qi)(qi)伴(ban)(ban)管(guan)(guan)(guan)溫(wen)(wen)度(du)(du)(du)(du)(du)90℃／100℃／110℃、環(huan)(huan)境(jing)(jing)(jing)溫(wen)(wen)度(du)(du)(du)(du)(du)-25℃）中選擇。

  ③. 環境溫(wen)(wen)度(du)、伴(ban)管介質(zhi)(zhi)的操作(zuo)條(tiao)件、保溫(wen)(wen)材料(liao)制(zhi)(zhi)品的熱(re)導(dao)率(lv)及傳熱(re)系數等數據(ju)與表1～表8不同時，伴(ban)管管徑及根數（采(cai)用硬質(zhi)(zhi)或(huo)半硬質(zhi)(zhi)圓形保溫(wen)(wen)材料(liao)制(zhi)(zhi)品）按下面公式計算。

2. 蒸(zheng)汽(qi)分(fen)配站和(he)疏(shu)水(shui)站

  ①. 對于蒸汽(qi)分(fen)配(pei)站和疏水站的(de)管徑(jing)也給出了下面的(de)公(gong)式，計算出S值(zhi)，再查詢SH3040相(xiang)應的(de)表格來獲(huo)得蒸汽(qi)分(fen)配(pei)站和疏水站的(de)管徑(jing)。

     S=A+2B+3C 式(shi)中A-DN15、612、10伴管(guan)根(gen)數(shu)；B-DN20伴管(guan)根(gen)數(shu)；C-DN25伴管(guan)根(gen)數(shu)。

  ②. 在3m半徑范圍內如有3個或3個以(yi)上的伴熱(re)(re)點(dian)及(ji)回收點(dian)時，蒸(zheng)(zheng)汽伴熱(re)(re)系(xi)統(tong)應(ying)(ying)設置蒸(zheng)(zheng)汽分配站(zhan)(zhan)和疏水(shui)站(zhan)(zhan)，熱(re)(re)水(shui)伴熱(re)(re)系(xi)統(tong)應(ying)(ying)設置熱(re)(re)水(shui)分配站(zhan)(zhan)和熱(re)(re)水(shui)回水(shui)站(zhan)(zhan)。站(zhan)(zhan)的設置應(ying)(ying)考慮(lv)統(tong)一考慮(lv)，布局合理，方便操作和維修。

3. 蒸汽伴(ban)管沿被伴(ban)熱管的最大允許(xu)有效伴(ban)熱長(chang)度（包括垂(chui)直管道）（表6-34）

  凝(ning)結(jie)水不回收時，最大允(yun)許有(you)(you)效伴熱(re)(re)長度可延長20％；采用導熱(re)(re)膠(jiao)泥時，最大允(yun)許有(you)(you)效伴熱(re)(re)長度宜縮短(duan)20％；對于(yu)出現U形彎時，在(zai)超過規定數值（蒸(zheng)汽壓力(li)0.3～0.5MPa，累計上升4m；蒸(zheng)汽壓力(li)大于(yu)0.5～0.7MPa，累計上升5m；蒸(zheng)汽壓力(li)大于(yu)0.7～1MPa，累計上升6m）時宜適當減少最大允(yun)許有(you)(you)效伴熱(re)(re)長度，但(dan)伴管(guan)累計上升高度不宜超過10m。

注：1. 蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)分(fen)(fen)(fen)(fen)配(pei)站(zhan)安裝(zhuang)位置高于蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)總管時(shi)，分(fen)(fen)(fen)(fen)配(pei)站(zhan)低(di)點(dian)可不設(she)排放冷凝水(shui)(shui)的蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)疏水(shui)(shui)閥(fa)系(xi)統(tong)，水(shui)(shui)平安裝(zhuang)的分(fen)(fen)(fen)(fen)配(pei)站(zhan)應(ying)無(wu)袋形(xing)并坡向蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)總管。蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)分(fen)(fen)(fen)(fen)配(pei)站(zhan)低(di)于蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)總管時(shi)，其上游(you)不得有下凹的袋形(xing)彎，分(fen)(fen)(fen)(fen)配(pei)站(zhan)的低(di)點(dian)應(ying)設(she)蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)疏水(shui)(shui)閥(fa)組。

      2. 蒸汽分配站至少有3根伴管（DN15）送(song)至半徑為3m范圍內的地點時才設置(zhi)，否則伴熱供(gong)汽管可直接(jie)從蒸汽總管上引出。

      3. 分(fen)配站應布置在不妨礙通行(xing)、便于操(cao)作的地方，布置應考慮整齊和美觀。

      4. 供汽(qi)管的(de)閥門應布置在便于接(jie)近的(de)地方。

     5. 分配站(zhan)的(de)蒸汽應(ying)從蒸汽總管的(de)頂(ding)部引出。

4. 熱(re)水伴管(guan)沿被伴熱(re)管(guan)的最大(da)允(yun)許有效(xiao)伴熱(re)長(chang)度(du)（包括垂(chui)直管(guan)道(dao)）（表6-35）

  注：按SH／T 3040，應注意有效伴熱長度和其他標(biao)準規定的(de)數值的(de)不同，根據(ju)項目實(shi)際情況選用。

  注(zhu)：按 SH／T 3040，應注(zhu)意有效伴(ban)熱長度和其他標準(zhun)規定的數值的不同，根據項(xiang)目(mu)實際情(qing)況選(xuan)用。