CERTIFICATE Norsok M-501 Coating System 6

CERTIFICATE Norsok M-501 Coating System 6

CERTIFICATE Norsok M-501 Coating System 6

 

A.6 Coating system no. 6

Application (if not specified under others) Surface preparation Coating system  DFT μm 
Coating system no. 6A:Un-insulated stainless steel when painting is required.

Aluminium when painting is required.

Sweep blasting with non-metallic and chloride free grit to obtain anchor profile of approximately 25 μm to 85 μm. 1 coat epoxy primer: 50
1 coat two component epoxy: 100
Coating system no. 6B:Hot dipped galvanised steel when paining is required. 1 coat topcoat: 75
Cleaning with alkaline detergent followed by hosing with fresh water. Minimum DFT (μm) of complete coating system: 225
Coating system no. 6C:Insulated stainless steel piping and vessels at temperatures < 150 °C.
Sweep blasting with non-metallic and chloride free grit to obtain anchor profile of approximately 2 coats epoxy phenolic: 2 x 125
25 μm to 85 μm. Minimum DFT(μm) of complete coating system:  250
NOTE 1 Coatings for stainless steel shall not contain metallic zinc.
NOTE 2 6Mo and 25Cr duplex stainless steel valves may be left uncoated. When such valves are welded into the piping system, the coating shall cover the weld zone and an additional 40 mm of the valve.
NOTE 3 When coating stainless steel with maximum operating temperatures above 150 °C, a high temperature modified coating suitable for the operating temperatures shall be used.
NOTE 4 Aluminium handrails located in living quarter shall be anodised.
NOTE 5 Aluminium including handrails and ladders located outdoors in marine atmosphere shall only be painted if specifically required e.g. due to safety requirements
NOTE 6 Hot dip galvanized steel may be coated with a 75 μm polyester powder coating. Surface preparation of the zinc prior to powder coating: Zinc manganese phosphate conversion coating.
NOTE 7 Aluminium may be coated with a 75 μm polyester powder coating. Surface preparation of the aluminium prior to powder coating: Chromate conversion coating.
NOTE 8 Only topcoats already pre-qualified in coating system no. 1 shall be used for coating system 6A and system no. 6B.