According to GB / T 30790-2014 (ISO 12944), from weakly corrosive indoor or inland (C2 and C3) to strongly corrosive industrial and marine environments (C4 and C5), the appropriate coating is recommended depending on the service life and the valve protective coating system.
System 1: Carbon steel surface, in the chemical industry, oil refining, marine and other atmospheric environment
Coating Products
Dry Film Thickness Microns
Applicable Environment (GB / T 30790)
Option One
H06-1-1 high solid epoxy zinc-rich primer
80
Corrosive atmosphere environment C4 C5I and C5M
H53-6 high solid epoxy mica iron rust-proof paint
100
BS52-12 Acrylic polyurethane top coatings
80
Option Two
H53-30 Epoxy zinc phosphate antirust paint
150
B52-12 Acrylic top coatings
80
System 2: Non-carbon steel non-ferrous metal surface, such as stainless steel, galvanized parts, aluminum and other surfaces
Coating Products
Dry Film Thickness Microns
Applicable Environment (GB / T 30790)
H53-10 non-ferrous metal epoxy primer
50
Atmosphere environment C3 C4 C5I and C5M
H53-6 high solid epoxy mica iron rust-proof paint
80
BS52-12 Acrylic polyurethane top coatings
80
System 3: Epoxy coal tar coating
Coating Products
Dry Film Thickness Microns
Applicable Environment (GB / T 30790)
HL52-3 Epoxy bitumen high build primer coatings
125
Buried or soaking Im1 Im2 Im3
HL52-3 Epoxy bitumen high build topcoat coatings
125
System 4 : High performance epoxy coatings
Coating Products
Dry Film Thickness Microns
Applicable Environment (GB / T 30790)
H53-16 High performance epoxy high build primer
150
Buried or soaking Im1 Im2 Im3
H52-15 Epoxy high build coatings
150
Note: Used in European countries where bituminous coating are forbidden
System 5: Solvent-free epoxy coatings
Coating Products
Dry Film Thickness Microns
Applicable Environment (GB / T 30790)
H52-20 solvent-free epoxy primer
200
Buried or soaking Im1 Im2 Im3
H52-20 solvent-free top coatings
200
Note: Used in countries and areas with stringent environmental requirements and in European countries where bituminous coating are forbidden
System 6: High temperature environment: 160 ° C
Coating Products
Dry Film Thickness Microns
Applicable Environment (GB / T 30790)
HS61-160 Epoxy polyurethane heat resistant corrosion protective primer
