8/19/2019 Extras Durata de Viata Din ISO 12944

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ISO 12944-5:2007(E) 10 © ISO 2007 – All rights reserved

• the condition of the substrate before preparation;

• the surface preparation grade;

• the quality of the surface preparation or!;• the condition of any "oints# edges and elds before preparation;

• the standard of the application or!;

• the conditions during application;

• the e$posure conditions after application%

 &he condition of an e$isting paint coating can be assessed by the use of ISO '(2)*+#ISO '(2)*2# ISO '(2)*,# ISO '(2)*'# ISO '(2)*- and ISO '(2)*(# and thee.ectiveness of surface preparation or! can be assessed using ISO )-0+*+ and ISO)-0+*,%It has been assu/ed in co/piling the tables in Anne$ A that the rst /a"or/aintenance painting ould nor/ally need to be carried out for reasons of corrosionprotection once the coating has reached 1i , as dened in ISO '(2)*,%

ased on this precondition# durability has been indicated in this part of ISO +23'' inter/s of three ranges4a) low (L): 2 years to 5 years;b) medim (!): 5 years to 15 years;") #i$# (%): more t#a& 15 years'

 &he durability range is not a 5guarantee ti/e6% urability is a technical considerationthat can help the oner set up a /aintenance progra//e%A guarantee ti/e is the sub"ect of clauses in the contract and is not ithin the scopeof this part of ISO +23''% &here are no rules that lin! the to periods of ti/e% Seealso (%2% &he guarantee ti/e is usually shorter than the durability range%8aint syste/s classied beteen - years and +- years durability are all classied as5/ediu/6% It is essential that users are aare of the ide e$tent of the /ediu/durability range and ta!e this into consideration hen developing specications%

9aintenance is often required at /ore frequent intervals because of fading# chal!ing#conta/ination or ear and tear# or for aesthetic or other reasons%