作废 CJ/T 114-2000
高密度聚乙烯外护管聚氨酯泡沫塑料预制直埋保温管 高密度聚乙烯外护管聚氨酯泡沫塑料预制直埋保温管 Preformed directly buried insulating pipes for polyurethand[PUR]foamed-plastics and high density polyethylene[PE]protect pipes
发布日期:2000-04-12
实施日期:2000-10-01
分类信息
标准简介

本标准规定了由高密度聚乙烯外护管、聚氨基甲酸酯(以下简称聚氨酯)硬质泡沫塑料保温层及钢管组成的预制直埋保温管(以下简称保温管)的结构、技术要求、试验方法和检验规则等。 本标准适用于输送介质温度(连续工作温度)不高于120℃,偶然峰值温度不高于140℃,工作压力不大于2.5MPa保温管的制造与验收。工作在不同温度下聚氨酯硬质泡沫塑料最短预期寿命的计算见附录B(提示的附录)

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最后更新时间 2025-08-30