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聚氨酯預(yù)制直埋保溫管
抗壓強(qiáng)度：徑向壓縮強(qiáng)度或徑向相對(duì)形變?yōu)?0%時(shí)的壓縮應(yīng)力不應(yīng)小于0.3MPa；
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聚氨酯預(yù)制直埋保溫管
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聚氨酯預(yù)制直埋保溫管
聚氨酯預(yù)制直埋保溫管及管件保溫層主要技術(shù)要求：
閉孔率：≥ 88%
泡孔平均尺寸：≤0.5mm
任意位置密度：≥60kg/m3
吸水率：（100℃，90min）≤10%
導(dǎo)熱系數(shù)：（50℃）≤0.033W/m.K
抗壓強(qiáng)度：徑向壓縮強(qiáng)度或徑向相對(duì)形變?yōu)?0%時(shí)的壓縮應(yīng)力不應(yīng)小于0.3MPa；
耐溫：峰值140℃，長(zhǎng)期運(yùn)行130℃
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第一廠區(qū)地址：天津市靜海區(qū)西翟莊鎮(zhèn)安莊子工業(yè)園
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