This British Standard is the UK implementation of EN ISO It supersedes BS EN ISO which is withdrawn. The UK. ISO. Third edition. Hot dip galvanized coatings on fabricated Details of the software products used to create this PDF file can be found in. Part 1 and 2. EN ISO coating minimum masses/ thickness on articles that are not centrifuged Datasheet 4b. Galvanizing to Standard BS EN ISO
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Hot dip galvanizing to EN ISO and CE marking of structural steelwork to EN Guidance Document. European General. Galvanizers Association. download your copy of BS EN ISO as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards. Specifications and test methods (ISO ) . EN ISO Metallic coatings – Hot dip galvanized coatings on ferrous materials.
The European and International standard covering post-fabrication hot dip galvanizing of steelwork I. EN ISO The standard excludes products processed by an automated process such as sheet, wire and tubes. Initially a visual inspection is conducted to access surface finish. The standard then lays down a post-galvanizing inspection regime indicating the minimum number of samples which should be taken for inspection based upon the size of the lot galvanized Table 1.
In addition, it also gives guidance upon the number of areas in an individual article from which batches of coating thickness measurements should be taken Table 2.
For articles in category A the average coating thickness in each reference area should meet the Average Coating Thickness Requirement. For articles in categories B-D the average coating thickness in each reference area should meet the Local Average Coating Thickness Requirement. The standard encourages coating thickness to be determined by non-destructive methods such as the use of a magnetic coating thickness gauge ISO although the Gravimetric Test ISO which is a destructive method remains the referee test in cases of dispute.
The galvanized coating should be continuous, relatively smooth and free from flux staining. The coating does not need to be perfectly smooth and some surface unevenness is permissible. In addition, the standard has no aesthetic requirements and consequently variation in coating appearance is permissible.
This is an important advantage of the galvanizing process; a standard coating thickness is applied almost automatically. The actual thickness of galvanized coating achieved varies with steel section size, surface profile and surface composition.
Actual coating weights are often much more than the minimum specified in the standard.
As coating life expectancy figures quoted are based on the minimum coating thickness they are therefore usually very conservative. The requirements of EN ISO include cleaning and preparation of steelwork as well as galvanizing.
Guidance on the design for hot dip galvanizing is contained in EN ISO 'Zinc coatings - Guidelines and recommendations for the protection against corrosion of iron and steel in structures - Hot dip galvanizing' and further guidance is available from Galvanizers Association.
EN ISO 'Zinc coatings - Guidelines and recommendations for the protection against corrosion of iron and steel in structures - General principles of design and corrosion resistance' contains data for performance of galvanized coatings. General guidance on corrosion protection is also given.
In the unlikely event of being unable to identify the correct clause for a particular galvanizing application, please contact Galvanizers Association for specific advice. BS Uploaded by Vikas Taneja. Flag for inappropriate content.
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Search inside document. Standards The basic specification for hot dip galvanized coatings on iron and steel articles is defined by a single standard, EN ISO "Hot dip galvanized coatings on iron and steel articles - specifications and test methods". Documents Similar To BS Bui Chi Tam.
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