直埋預(yù)制保溫管由輸送介質(zhì)的鋼管，聚氨酯硬質(zhì)泡沫保溫層和高密度聚乙烯外套管緊密結(jié)合而成，該產(chǎn)品主要用于城
鎮(zhèn)集中供熱管網(wǎng)，石油輸送管線，高寒地區(qū)輸水管線及廠區(qū)工業(yè)管道工程，它具有高效保溫、防水防腐和施工簡便，不怕
植物根刺的優(yōu)點，施工不需地溝敷設(shè)，能在0.6-1.2米凍土層內(nèi)直埋，熱損失比傳統(tǒng)工藝可降低40%，使用壽命比其他絕熱
防腐材料提高3-5倍以上，使用壽命可達30-50年。
Direct-buried prefabricated thermal insulation pipe is made by closely attach- ing the transm-
ission medium of steel pipe ,polyurethane hard foamed thermal insulation layer and HDPE outer casing This project is mainly used on urban central heating networks, petroleum transmission pipelines ,
water supply pipe- lines in high and cold areas and industrial pipeline projects in factory areas .
It has the advantages of highly effective thermal insulation,water resistance and corrosion resis－
tance and resistance to puncture by plant roots. Trench laying is not required during construct－
ion and it can be directly buried in the frozen earth layer 0.6to 1.2m deep。The amount of thermal
loss can be reduced by 40%as compared with the traditional process. Its service life can reach 30
to 50 years, which is 3to 5 times longer than other thermal insulat-ion and corrosion resistant materials.
預(yù)制直埋熱水保溫管性能指標
| 項目 |
單位 |
技術(shù)指標 |
| 密度 |
kg/m3 |
≥60（任意位置） |
| 導(dǎo)熱系數(shù) |
kg/m3 |
≤0.033 |
| 徑向壓縮強度 |
Mpa |
≥0.3 |
| 吸水率 |
% |
≤10 |
| 閉孔率 |
% |
≥88 |
| 使用溫度 |
℃ |
140℃ |
預(yù)制直埋熱水保溫管規(guī)格型號
| 鋼管規(guī)格 |
外套管規(guī)格 |
保溫層厚度（mm) |
長度（m) |
| Ф60×3.0 |
Ф125×2.5 |
30 |
6 |
| Ф76×3.0 |
Ф140×3.0 |
29.5 |
6 |
| Ф89×4.0 |
Ф160×3.0 |
32.5 |
6 |
| Ф114×4.0 |
Ф200×3.2 |
39.8 |
6 |
| Ф140×4.5 |
Ф225×3.5 |
39 |
6 |
| Ф165×4.5 |
Ф250×3.9 |
38.6 |
6 |
| Ф219×6.0 |
Ф315×4.9 |
43.1 |
12 |
| Ф273×6.0 |
Ф365×5.6 |
40.4 |
12 |
| Ф325×7.0 |
Ф420×7.0 |
40.5 |
12 |
| Ф377×7.0 |
Ф500×7.8 |
53.7 |
12 |
| Ф426×7.0 |
Ф550×8.8 |
53.2 |
12 |
| Ф478×7.0 |
Ф600×8.8 |
52.2 |
12 |
| Ф529×8.0 |
Ф655×9.8 |
53.2 |
12 |
| Ф630×8.0 |
Ф760×11 |
53.9 |
12 |
| Ф720×9.0 |
Ф850×12 |
53.0 |
12 |
| Ф820×10.0 |
Ф960×13 |
57.0 |
12 |
| Ф920×10.0 |
Ф1054×14 |
53.0 |
12 |
| Ф1020×12 |
Ф1155×14 |
53.5 |
12 |
| Ф1220×12 |
Ф1380×15 |
65.0 |
12 |
