A&L_n2_APRILE_2016

Applications
from the refinisher that carries out the single components’
surface treatment.
Doubts could however arise concerning requisites set by
norm 1090 regarding surface treatments (and the companies
that carry out such treatments) of steel and aluminium
components destined to form metal structures in turn requiring
CE Marking.
Norms1090-2and1090-3(thatspecificallyconcernsteel
and aluminium structures respectively) refer to the respect
of norms regulating refinishing (ISO 12944-7 for steel, EN
12206 for powder-coated aluminium) and to other norms
thatconcerntreatmentscarriedoutpriortopanting.
Specifically, norm 1090-3, regarding painting of aluminium
components, states that “Specification, quality assurance
and quality assessment can be done in the framework of
recognised European quality programmes ……. For powder
coatings EN 12206”.
Webelievetherearenodoubtsthat “RecognisedEuropean
quality programmes” include not only technical regulations
but also Specifications and/or Technical regulations
of such European quality markings as, for instance, QUALI-
COAT for coated aluminium, QUALANOD for anodized aluminiumandQUALISTEELCOATforcoatedironandsteel.
This is also the case because such directives can provide
better quality assurance than the mere technical process
and product regulations, as they also foresee the respect
of adequate procedures for production control both as
concerns self-performed controls as well as third party inspections.
Advantages that derive from obtaining these certifications
are self-evident:
themanufacturersofthestructurethatpainttheitems
within their production plants would be equipped with
an instrument that could prove the reliability of the work
done, as a durability guarantee for structural elements;
manufacturers deciding to entrust a subcontractor with
painting may simplify qualification of their suppliers who
would have the best requisite (certification itself) as a
guarantee of the work done
Manufacturers’ and refinishers’ assignments
Themanufacturerisassignedthetaskofpreparinga“painting
specification” - agreed upon with the refinisher – that
represents an extension of the manufacturer’s FPC, without
interrupting the product’s traceability.
Considering only iron constructions, a painting specification
should contain, where applicable, the following elements:
• Type of substrate (steel or zinc-plated steel)
• Substrate surface preparation grade
• Painting system used (as per ISO 12944
or QUALISTEELCOAT specifications);
• Corrosion and durability grade for which the
coating system is designed
• Type of coating (powder or liquid)
• Type of varnishing products;
ra, che possono influenzare, modificare o determinare le caratteristiche
prestazionali delle strutture.
Traqueste,iprocessiditrattamentodellesuperficie,inparticolare,
di verniciatura.
LamarcaturaCEdellestrutturemetalliche
Il processo di rivestimento mediante verniciatura è una delle
modalità per garantire un certo livello di protezione nei confrontidellacorrosionedeglielementistrutturalid’acciaioe
lanormaEN1090-2identificairequisitielelineeguidaper
leaziendediverniciatura.ÈprevistoinfattichelelavorazioniedilrelativoProcessodiControllosianogestitiinaccordoall’AppendiceFdellanormaedallenormedellaserieISO
12944 in esso richiamate.
Non esistono dubbi sul fatto che questa marcatura deve essereappostadalcostruttore/assemblatoredellastrutturametallica
finita e che il requisito della marcatura CE non è richiesto
al verniciatore che effettua il trattamento superficiale dei
singoli componenti.
Potrebberoinvecesorgeredeidubbisuirequisitirichiestidallanorma1090aitrattamentisuperficiali(eallaaziendeche
effettuano gli stessi trattamenti) dei componenti in acciaio e
in alluminio destinati alla realizzazione di strutture metalliche
soggette alla marcatura CE.
Lenorma1090-2e1090-3(specificherispettivamenteperle
struttureinacciaioeinalluminio)rimandanoalrispettodelle
norme sulle verniciatura (per l’acciaio la ISO 12944-7, per
l’alluminio verniciato a polveri alla EN 12206) e ad altre nor-
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