NF EN ISO 12624
Thermal insulating products for building equipment and industrial installations - Determination of trace quantities of water-soluble chloride, fluoride, silicate, sodium ions and pH
This document specifies the equipment and procedures for determining trace quantities of the water-soluble chloride, fluoride, silicate and sodium ions in an aqueous extract of the product. It also describes a procedure for the determination of the pH of the aqueous extract. It is applicable to thermal insulating products. NOTE The determination of these parameters can be relevant for thermal insulating products intended for application to stainless austenitic steel surfaces. The presence of chloride, fluoride, silicate and sodium ions under certain conditions can influence the risk of stress corrosion cracking. See Annex B for further information on general use of this document.
This document specifies the equipment and procedures for determining trace quantities of the water-soluble chloride, fluoride, silicate and sodium ions in an aqueous extract of the product. It also describes a procedure for the determination of the pH of the aqueous extract. It is applicable to thermal insulating products.
NOTE The determination of these parameters can be relevant for thermal insulating products intended for application to stainless austenitic steel surfaces. The presence of chloride, fluoride, silicate and sodium ions under certain conditions can influence the risk of stress corrosion cracking. See Annex B for further information on general use of this document.
- Avant-propos
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1 Domaine d'application
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2 Références normatives
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3 Termes et définitions
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4 Principe
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5 Appareillage
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6 Éprouvettes
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7 Mode opératoire
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8 Calcul et expression des résultats
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9 Exactitude de mesure
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10 Rapport d'essai
- Annexe A (normative) Mesure des fluorures par spectrophotométrie avec le complexe SPADNS du zirconium
- Annexe B (informative) Informations générales relatives à l'application du présent document
- Annexe C (informative) Exemple d'appareillage en verre borosilicaté utilisé pour la préparation des solutions de lixiviation de matériaux isolants thermiques flottants
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