NBN EN 253 : 2009 + A2 2015现行
DISTRICT HEATING PIPES - PREINSULATED BONDED PIPE SYSTEMS FOR DIRECTLY BURIED HOT WATER NETWORKS - PIPE ASSEMBLY OF STEEL SERVICE PIPE, POLYURETHANE THERMAL INSULATION AND OUTER CASING OF POLYETHYLENE
出版：Belgian Standards
专家解读视频
基本信息
标准编号： NBN EN 253 : 2009 + A2 2015
标准类别：Standard
出版单位：Belgian Standards
标准页数：0
标准简介
Defines requirements and test methods for straight lengths of prefabricated thermally insulated pipe-in-pipe assemblies for directly buried hot water networks, comprising a steel service pipe from DN 15 to DN 1200, rigid polyurethane foam insulation and an outer casing of polyethylene.
