NBN EN 523:2003现行
Steel Strip Sheaths For Prestressing Tendons - Terminology, Requirements, Quality Control
出版：Belgian Standards
专家解读视频
Applies 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.
I.S. EN 523:2003 - Identical
SS EN 523 Ed. 2 (2003) - Identical
UNE EN 523:2005 - Identical
NS EN 523 Ed. 2 (2003) - Identical
I.S. EN 523:1997 - Identical
UNI EN 523:2005 - Identical
NF EN 523:2004 - Identical
ONORM EN 523:2003 - Identical
DIN EN 523 (2003-11) - Identical
BS EN 523:2003 - Identical
NEN EN 523:2003 - Identical
SN EN 523:2003 - Identical
