It is a great honor that our company has obtained the CE certificate of EN14399-4, which will further enhance our company's pursuit of quality.
Below document on structural bolting reflects the situation in Europe where two technical solutions exist to achieve the Necessary ductility of bolt/nut/washer assemblies. These solutions utilize different systems (HR and HV) of Bolt/nut/washer assemblies.Both systems are well proved and it is up to the experts responsible for Structuring bolting whether they use the one or the other system.
However, important for the performance of the assembly to avoid mixing up the components of both systems. Therefore, the bolts and nuts for both systems are standardized in one single part of this European Standard each And the marking of the components of the same system is uniform.
|Bolt/nut/washer assembly System HR||Bolt/nut/washer assembly System HV|
|General Requirements||EN 14399-1|
|Bolt/nut assembly||EN 14399-3||EN 14399-4|
|Property classes||8.8/8 10.9/10||10.9/10|
|Washer(s)||EN 14399-5 or EN 14399-6||EN 14399-5 or EN 14399-6|
|Suitability test for preloading||EN 14399-2||EN 14399-2|