I.S. EN 523:2003现行
Steel Strip Sheaths for Prestressing Tendons - Terminology, Requirements, Quality Control
出版：National Standards Authority of Ireland
专家解读视频
Pertains to uncoated cylindrical steel sheaths with a corrugated profile and with a nominal internal diameter of up to 130 mm and their connectors (couplers) which are assembled to form ducts for prestressing tendons in post-tensioned prestressed concrete structures.
NBN EN 523:2003 - Identical
UNI EN 523:2005 - Identical
UNE EN 523:2005 - Identical
NF EN 523:2004 - Identical
SS EN 523 Ed. 2 (2003) - Identical
NEN EN 523:2003 - Identical
SN EN 523:2003 - Identical
BS EN 523:2003 - Identical
