This European Standard is applicable for internally coated cylindrical aluminium tubes, mainly used for the packing of pharmaceutical, cosmetic, hygiene, food or other household products. The internal coating is used as a barrier and should avoid any contact between aluminium and the product. This standard defines the copper sulphate method to detect the electrolyte conductivity as one criterion for the quality of the internal coating. The electrolyte conductivity of the internal coating is only one criterion for evaluation of the quality of an internal coating. It does not give any information on the quantity or size of any pores or uncoated areas, nor any hint on possible reactions between the aluminium tube and the product. The electrolyte conductivity should never be used as the sole criterion for quality evaluation of the internal coating, but always with other parameters e. g. film thickness, acetone and/or ammonia resistance and of course results of enhanced stability studies.
EN 15384-2:2017 Referenced Document
EN 12374:2009 Packaging - Flexible tubes - Terminology
EN 13046:2000 Packaging - Flexible cylindrical metallic tubes - Dimensions and tolerances
EN 13047:2000 Packaging - Flexible conical metallic tubes - Dimensions and tolerances
ISO 2859-1:1999 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
EN 15384-2:2017 history
2017EN 15384-2:2017 Packaging - Test method to determine the porosity of the internal coating of flexible aluminium tubes - Part 2: Copper sulphate test