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预保温管道及其生产方法公开号 :1332 832 /公开日 :2 0 0 2 .0 1.2 3/申请人 :壳牌国际研究有限公司摘要 :提供一种预保温管道 ,它包含一个内管 ,其周围环绕一个外壳 ,以及位于两者之间装有包含一种多异氰酸酯改性聚氨酯泡沫的单块保温材料层。这类预保温管道能以连续法生产 ,
Pre-insulated pipe and its production method Publication number: 1332 832 / Date of publication: 200 0 2 .0 1.2 3 / Applicant: Shell International Research Limited Abstract: A pre-insulated pipe is provided which comprises an inner pipe around Surrounds a housing, and a single layer of insulation between the two containing a polyisocyanate-modified polyurethane foam. Pre-insulated pipes of this type can be produced in a continuous process,