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                                                                                                                                                                                                                                                                                                                                                                    聚氨酯預制保溫管結構解析

                                                                                                                                                                                                                                                                                                                                                                    時間:2013-11-05 瀏覽次數:786

                                                                                                                                                                                                                                                                                                                                                                    聚氨酯預制保溫管結構解析:

                                                                                                                                                                                                                                                                                                                                                                    聚氨酯預制保溫管的結構解析為您介紹

                                                                                                                                                                                                                                                                                                                                                                    *層:工作鋼管層,根據設計和客戶的要求一般選用無縫管(GB8163-87)螺旋焊管(GB9711-88;SY/T5038-92)和直縫焊管(GB3092-93)。鋼管表面經過先進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。鋼管表面除污除銹后涂刷一層氰凝防腐材料,其作用一是防水,二是改善保溫層與鋼管之間的粘接表面,使它形成一個整體。

                                                                                                                                                                                                                                                                                                                                                                    第二層:聚氨酯保溫層,用高壓發泡機在鋼管于特制鋼模具之間形成的空腔中一次性注入硬質聚氨酯泡沫塑料原液而成。即俗稱的“模具發泡工藝”。聚氨酯泡沫是否發滿,有任何質量問題便于直接檢驗。其作用一是防水,而是保溫,三是支撐熱網自重。當輸送介質溫度為:-50℃—120℃時,選用硬質聚氨基甲酸酯泡沫塑料做保溫層;當輸送介質溫度為:-50℃—150℃時,選用硬質聚氨基脲酸酯泡沫塑料做保溫層。

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