Sedelon Valve Painting Standard

Date:2021-11-10 03:04:50 click:34

Different engineering environments and corrosion classes have different standards for valve painting.


Sedelon valve painting standard is as follows:

Corrosion Class

Weight Loss/
Thickness Loss

External Environment

Internal Environment

C1, C2

<10-200g/㎡
(1.3-25μm)

Country/dry area
low pollution

Heated/unheated buildings/neutral atmospheric environment

C3

200-400g/㎡
(25-50μm)

Urban and industrial atmospheric environment

moderate SO₂pollution
coastal areas with low salinity

Workshops with high humidity and mild air pollution

C4

400-650g/㎡
(50-80μm)

Industrial areas and coastal areas with moderate salinity

Chemical plant
swimming pool

C5-I(industry)

650-1500g/㎡
(80-200μm)

Industrial areas with high humidity and harsh atmospheric environment

Almost long-term condensate/heavily polluted buildings or areas

C5-M(ocean)

650-1500g/㎡
(80-200μm)

Coastal and offshore areas

Almost long-term condensate/heavily polluted buildings or areas


Category

DFT Range(μm)

(Contains Zinc-Rich Primer)
Least dft(μm)

Expected Anti-corrosion Years

C2

80


Low(2-5 years)

80-120


Middle(5-15 years)

160-200

80

High(>15 years)

C3

120-160


Low(2-5 years)

160-200

80

Middle(5-15 years)

200-240

160

High(>15 years)

C4

160-200

160

Low(2-5 years)

200-240

200

Middle(5-15 years)

240-320

240

High(>15 years)

C5I
C5M

200-240

200

Low(2-5 years)

240-280

240(C5I), 280(C5M)

Middle(5-15 years)

280-400

280(C5I), 320(C5M)

High(>15 years)


Usually, except for carbon steel material(WCB,LCB,etc.),valves material of stainless steel, bronze and other materials do not need to be painted due to themselves are corrosion-resistant.


In addition, Sedelon can customize the valve painting color according to customer requirements.

The following are various valves with different painting colors for your reference.