Steel pipe knowledge: anti-corrosion treatment of ductile iron pipe

Steel pipe knowledge: anti-corrosion treatment of ductile iron pipe
1. Asphalt paint coating Asphalt paint coating is used to transport gas pipelines. Preheating the pipe before painting can improve the adhesion of asphalt paint and accelerate drying
2 Cement Mortar Lining Special coating The internal anti-corrosion measures are applicable to the pipelines for conveying sewage, and can improve the corrosion resistance of the lining.
3. Epoxy coal tar coating The epoxy coal tar coating is applicable to both gas and sewage pipelines. It is a two-component coating with high adhesion and a very smooth surface
4. Epoxy ceramic lining Epoxy ceramic lining is suitable for sewage pipelines and gas pipelines, but due to the difficulty and cost of the manufacturing process, there are certain limitations in its use. Epoxy ceramic linings have excellent adhesion and finish and are an excellent anti-corrosion coating.
5. The two types of special cement coatings, aluminate cement coating and sulfate cement coating, are suitable for internal corrosion protection of ductile iron pipes for sewage pipelines.
Improve resistance to acid and alkaline components in wastewater.
6. Polyurethane coating is a special coating, a kind of high-grade secondary coating Second: The performance of anti-corrosion treatment of ductile iron pipe Ductile iron pipe is a type of cast iron, an alloy of iron, carbon and silicon. The graphite in graphite ductile iron exists in a spherical form, generally the size of graphite is 6-7 grades, and the quality requires that the spheroidizing grade of the cast pipe be controlled to 1-3 grade (spheronization rate ≥80%
Therefore, the mechanical properties of the material itself have been improved, with the nature of iron and the performance of steel. Annealed ductile iron pipe, the metallurgical structure of ferrite plus a small amount of pearlite, good mechanical properties.
The source of the information.

Illuminators

The light source (which is often also called a fiber optic projector or fibre optic illuminator) provides the illumination to any fibre optic lighting system. They contain the lamp or LED and any additional control gear to provide special lighting effects.

Light sources are the only part of a fibre optic system which contains electricity, and they are the only part that, depending on the type, can get warm to the touch.

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