NBN EN 253 : 2009 + A2 2015現行
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
專家解讀視頻
基本信息
標準編號： NBN EN 253 : 2009 + A2 2015
標準類別：Standard
出版單位：Belgian Standards
標準頁數：0
標準簡介
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.
