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class="attribute-value"><div>全國</div></td> </tr> </table> <div id="qwcagsgoaso" class="text-more" contextmenu="return false" unselectable="on">  <div> <p>將環(huán)境溫度、黑料溫度升高即可解決。一般將黑料溫度升至30－60℃，出產(chǎn)的黑夾克直埋式保溫管在保溫管商場(chǎng)上是*值得信任的,而且我廠(chǎng)的直埋式還出產(chǎn)聚氨酯直埋保溫管,黑夾克直埋式直縫鋼管,黑夾克直埋無(wú)縫鋼管,內滑動(dòng)式鋼套鋼直埋保溫管,外滑動(dòng)式鋼套鋼直埋保溫管,黃夾克直埋保溫管,熱力管道用埋地保溫鋼管采用直埋供熱管道技術(shù)，標志著(zhù)中國供熱管道技術(shù)發(fā)展已經(jīng)進(jìn)入了新的起點(diǎn)。<br/><img src="http://oss10.huangye88.net/live/2023/06/17/42d9cec309818f078c3a3d5e5af6b1ca.jpg@750w_750h_90Q" /><br/>預制直埋聚氨酯保溫管 <br /> 預制直埋聚氨酯保溫管小區管網(wǎng)聚氨酯保溫管是各大工業(yè)部門(mén)不可或缺的保溫材料，聚氨酯保溫管以其優(yōu)良的性能及特點(diǎn)而備受人們的歡迎。預制鋼套鋼聚氨酯保溫管選用二度無(wú)機富鋅底漆(耐溫≥400℃)防腐涂層，管道端口選用聚乙烯薄膜或三層PE冷纏帶密封，防止安裝入潮氣或施工中進(jìn)入水。<br/><img src="http://oss10.huangye88.net/live/2023/06/16/07dfda4e091a0c5e7d253b7c9735ce89.jpg@750w_750h_90Q" /><br/>直埋保溫管從里到外分三層結構 <br /> 層：工作鋼管層根據設計和客戶(hù)的要求一般選用無(wú)縫管（GB8163-87）螺旋焊管（GB9711-88;SY/T5038-92）和直縫焊管（GB3092-93）。鋼管表面經(jīng)過(guò)的拋丸除銹工藝處理后，鋼管除銹等級可達GB8923-1988標準中的Sa2級，表面粗糙度可達GB6060.5-88標準中R=12.5微米。 <br /> **層：聚氨酯保溫層用高壓發(fā)泡機在鋼管于外護層之間形成的空腔中一次性注入硬質(zhì)聚氨酯泡沫塑料原液而成。即俗稱(chēng)的管中管發(fā)泡工藝。其作用一是防水，二是保溫，三是支撐熱網(wǎng)自重。當輸送介質(zhì)溫度為：-50℃120℃時(shí)，選用硬質(zhì)聚氨基*酸酯泡沫塑料做保溫層。 dn250預制直埋聚氨酯保溫管/管材<br /> 第三層：度聚乙烯保護層預制成一定壁厚的黑色（）塑料管材，其作用一是保護聚氨酯保溫層免遭機械硬物破壞，二是防腐防水。<br /> 聚乙烯外套管采用度聚乙烯材料制成，具有的機械強度和優(yōu)良的耐腐蝕性能，可以保護管材在運輸、安裝及使用過(guò)程中避免因外界因素而造成的破壞。</p> </div> <div id="qwcagsgoaso" class="pages"> <span id="qwcagsgoaso" class="leftpage"><font>上一條 </font><a href="http://m.guizhouboda.com/ershouhuishou/88-d32dn7sm95f7c0.html" target="_blank" title="臨海氫氧化鋰回收有多少要多少,回收氫氧化鋰">臨海氫氧化鋰回收有多少要多少,回收氫氧化鋰</a></span> <span id="qwcagsgoaso" class="rightpage"><font> 下一條</font><a target="_blank" title="通州處理庫存萜烯樹(shù)脂量大從優(yōu),回收環(huán)氧樹(shù)脂">通州處理庫存萜烯樹(shù)脂量大從優(yōu),回收環(huán)氧樹(shù)脂</a></span> </div> </div> </div> </div> </div> <div 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