NORSOK R-002 Rev. 2

5.24 Corrosion protection, Surface preparation,Protective coating and Bolting• Due consideration to risk of corrosion when selecting materials and materialcombinations• Surface preparation and protective coating shall be in accordance with NORSOKM-501 and/or ISO 12944-1.• Corrosion resistant steel shall be used for external bolting of 10 mm diameter andsmaller. (NB: For temperaturer >50 grader bør en ikke bruke vanlig 316 eller 316Lpga. Chloride cracking)• Larger bolts shall normally be hot-dip galvanised low alloy steel. If other qualitiesare used, special corrosion protection measures shall be applied, e.g. protectedcups grease filled.• Bolt assemblies that are essential to mechanical safety, shall be in accordance withISO 898-1 and DNV Standard for certification of lifting appliances, No.2.22, Ch.2,Sec. 2, C200 and D400.52Classification: Internal 2012-02-20