Pipe coating is to apply a layer of protective fuel to the surface of the pipeline to extend the life and improve the performance of the pipeline. The coating can be solid, liquid or powder. Pipeline coating is the key to protecting the pipeline.
The main purpose of Pipe coating
Anti-corrosion
The coating can effectively isolate the external air or liquid and effectively prevent the pipeline from being corroded.
Reduce wear
There will be friction and impact inside and outside the pipeline, and the coating can effectively buffer the friction, thereby extending the life
Prevent scaling and deposition
Pipeline coating can effectively reduce the accumulation of dirt and thus reduce the flow rate.
Provide insulation
Insulator coating can be applied to achieve the function of anti-electricity and ensure safety
Improve fluid delivery efficiency
The coating surface is smooth to reduce the resistance to flow and ensure the delivery capacity.
Extend the service life of the pipeline:
Through measures such as anti-corrosion, wear reduction and anti-scaling, the service life of the pipeline is extended.
Environmental adaptability
Protect the pipeline so that it can still work normally under extreme conditions.
Types of Pipe coating materials
- Epoxy resin: It has good corrosion resistance and chemical resistance, suitable for metal and concrete.
- Polyurethane: has good wear resistance and elasticity, and also has certain chemical resistance. It is usually used in situations where high mechanical strength and flexibility are required.
- Polyethylene: It is often used in buried pipes to prevent corrosion and isolate substances in the soil.
- Coal tar pitch: It is low in price and has good corrosion resistance. It is often used in buried and humid environments.
- Polypropylene: It has chemical and heat resistance. .
- Ceramic coating: It provides extremely high wear resistance and heat resistance. It is suitable for industry and mining and is often used under extreme conditions.
- Powder coating: Powder coating applied by electrostatic spraying has chemical resistance and UV resistance.
- Fluoride coating: It has extremely high corrosion resistance and temperature resistance and is suitable for pipes in extreme chemical environments.
Pipe coating procedures
- Surface preparation (cleaning, grinding or sand blasting)
- Inspection and repair
- Base coating
- Application of main coating:
- Drying and curing
- Inspect coating
