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雙層復(fù)合管道、管件存放處與施工現(xiàn)場(chǎng)溫差較大時(shí),連接前應(yīng)將管材、管件在施工現(xiàn)場(chǎng)放置至少半小時(shí),使其溫度接近施工現(xiàn)場(chǎng)溫度。雙層復(fù)合管道連接時(shí),管道、管件的切割必須采用供應(yīng)商提供的專用管剪或管刀。切割斷面需平整、光滑、去毛刺,且斷面應(yīng)垂直于管軸線。