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NEN-EN 1090

NEN-EN 1090-1: CE marking on steel structures

Due to revised laws, all components of a load-bearing steel and/or aluminium structure are required to carry a so-called CE marking as of 1 July 2014. With a CE marking, the manufacturer declares that all construction requirements have been fulfilled. The CE marking not only applies to the steel structure as a whole, but also to all component parts. This means that not only the supplier of the final product must be able to supply a CE marking, but also all sub-suppliers. Kuyer Metaal has held the NEN-EN-1090 certification issued by Lloyds Register since April 2014.

The NEN-EN 1090 is a standard for manufacturers that perform machining operations on basic products to make steel and/or aluminium based construction components.

The EN 1090 is also important for everyone that is involved in steel or aluminium components, such as clients, suppliers, contractors, supervisory authorities, construction companies, designers and engineering bureaus. Quality controls are required for certain processes such as cutting, drilling, welding and preserving. The purpose is to guarantee full oversight and control of the product to ensure proper quality.

Kuyer Metaal is EXC 3 certified for steel, aluminium and stainless steel. The execution classes – thus also the components – are classified under classes EXC 1 – 4. These execution classes have been established to designate the level of control and oversight. The execution classes range from EXC 1, which applies to non-load-bearing structures, to execution class EXC 4, for heavy load-bearing structures.

Quality controls are required for certain processes, such as cutting, drilling, welding and preserving. The purpose is to guarantee full oversight and control of the product to ensure proper quality.

In order to meet the requirement as a manufacturer to apply the CE mark, the manufacturer will have to meet all the requirements specified in NEN-EN 1090-1, such as Factory Production Control (FPC) and welding certificates, etc.

Manufacturers must be FPC certified in accordance with EN 1090-1 in order to be authorised to apply a CE mark. With this certificate, a manufacturer can show it fulfils the requirements and that it is permitted to apply a so-called CE mark to the product. When applying for FPC certification, the authority verifies whether the quality of the people, the production resources and the site are adequate enough to supply the requested product. A DoP (Declaration of Performance) must also be issued along with this CE declaration, which is available on Kuyer Metaal’s website.

The ISO 3834-2 standard forms the basis for earning the NEN-EN-1090, which contains a quality assurance system for fusion welding. The ISO 3834-2 lists the extensive quality requirements in detail. For example, it contains requirements for evaluating the welding work from a technical standpoint, such as welding method qualification, requirements for the welders, inspections and non-destructive testing.

A NEN-EN 1090 certified company works under the stringent oversight of an accredited, independent quality assurance authority, which is Lloyds Register LRQA in the case of Kuyer Metaal.


Download the NEN-EN 1090 Certificate here.

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