Used in conjunction with the Elcometer 145 Dust Tape Roller the kit can be used in accordance with the recommendations of BS EN ISO 8502-3 either as a pass/fail test or as a permanent record of the presence of dust.
Iso 8502-3 Pdf Free Download --
International Standard IS0 8502-3 was prepared by TechnicalCommittee ISO/TC 35, Paints and varnishes, Sub-Committee SC 12,Preparation of steel substrates before application of paints andrelated products.
In the painting schedule requirements of contractual documentsgiving details of surface preparation by blast-cleaning, it isnormally specified that all surfaces shall be free from surfacecontamination including oil, grease, dirt, dust and water-solublesalts.
Dust on blast-cleaned steel surfaces may reduce the adhesion ofsub- sequently applied organic coatings and, by absorbing moisture,may promote the corrosion of the blast-cleaned steel surfaces.Accumulation of dust more naturally occurs on horizontal surfaces,the interior of pipes, and in structural cavities. Specialinspection should be carried out to ensure that such areas areadequately cleaned and adequately free from dust beforepainting.
1.4 While a test procedure in which pressure is applied to atape using the thumb is subjective, it is usually adequate,especially for use in situations where surfaces free from dust arerequired. In cases of dispute, except when rust grade C or D is in-volved, pressure may be applied to the back of the adhesive tapeusing a spring-loaded roller.
May 2017 Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness - Part 3: Assessment of dust on steel surfaces prepared for painting (pressure-sensitive tape method) (ISO 8502-3:2017)
ISO 8502-3:2017 describes a method for the assessment of dust remaining on cleaned steel surfaces prepared for painting. It provides pictorial ratings for the assessment of the average quantity of dust. It also provides descriptive classes for the assessment of the average size of the dust particles.
2ff7e9595c
Comments