NF EN ISO 21809-3

Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems — Part 3: Field joint coatings

La présente partie de l''ISO 21809 spécifie les exigences relatives au revêtement des joints soudés sur site des tubes en acier sans soudure et soudés destinés aux tronçons enterrés et immergés des systèmes de transport par conduites utilisés dans les industries du pétrole, de la pétrochimique et du gaz naturel, tels que définis dans la NF ISO 13623. La présente partie de la NF ISO 21809 spécifie la qualification, l''application et les essais relatifs aux revêtements de protection contre la corrosion appliquée aux surfaces d''acier laissées nues après l''assemblage des tubes et raccords (composants) par soudage. Le présent document définit et codifie dans le Tableau 1 les différents types de revêtement des joints soudés sur site pour conduites. Il ne traite pas des exigences relatives à la protection mécanique complémentaire, l''isolation thermique ou le remplissage des joints des tubes lestés avec du béton. Les joints soudés sur site des tubes et raccords revêtus conformément à la présente partie de la NF ISO 21809 sont considérés comme étant adaptés à une protection cathodique complémentaire.

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