Different engineering
environments and corrosion classes have different standards for valve painting.
Sedelon valve painting
standard is as follows:
| Corrosion Class | Weight Loss/ | External Environment | Internal Environment |
| C1, C2 | ＜10-200g/㎡ | Country/dry area | Heated/unheated buildings/neutral |
| C3 | 200-400g/㎡ | Urban and industrial atmospheric environment moderate SO₂pollution | Workshops with high humidity and |
| C4 | 400-650g/㎡ | Industrial areas and coastal areas with moderate | Chemical plant |
| C5-I(industry) | 650-1500g/㎡ | Industrial areas with high humidity and harsh atmospheric | Almost long-term |
| C5-M（ocean） | 650-1500g/㎡ | Coastal and offshore areas | Almost long-term |
| Category | DFT Range(μm) | （Contains Zinc-Rich Primer） | 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 | 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.
