Urban heating—Prefabricated directly buried insulating pipes and fittings with polyurethane(PUR)foamed-plastics and glass fiber reinforced plastics protect layers
全国城镇供热标准化技术委员会(SAC/TC 455)
本标准规定了玻璃纤维增强塑料外护层聚氨酯泡沫塑料预制直埋保温管及管件的术语和定义、结构、要求、试验方法、检验规则及标志、运输和贮存。
本标准适用于输送介质温度（长期运行温度）不高于120 ℃，偶然峰值温度不大于140 ℃的预制直埋保温管及管件。
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