Self-Propagating ceramic composite pipes

- Dec 21, 2020-

Self-propagating ceramic compostite pipes are made by self-propagating high-temperature synthesis-centrifugal method. And it creates a new generation of abrasion and corrosion resistant engineering pipeline. The composite pipe is composed of three layers: ceramic, intermediate, and steel layers. The ceramic layer is formed by molten alumina at a temperature above 2500 degree. The molten alumina produced from the reaction Fe2O3+2Al=2Fe+Al2O3 spreads on the inside wall of the steel pipe under the influence of a centrifugal force, then solidifies, so the ceramic layer has high density and smooth surface and bonds to the steel pipe.

Advantage

-- Free equilibrium state

This performance is very useful in engineering construction.

Only when the temperature rises above 400 °C, the thermal stress coefficient is different, and the new stress field generated by thermal expansion and the original stress field in the ceramic steel pipe cancel each other out, so that the ceramic layer and the steel layer are in a free equilibrium state. When the temperature is raised to 900 °C, the self-propagating ceramic composite pipe is placed in the hydrophobic water, repeatedly soaked several times, the composite layer is not cracked, showing the unmatched thermal shock resistance of ordinary ceramics.

 

-- Easy to install

Because the outer layer is steel, and the inner layer does not crack when it is heated, flanges can be welded during construction, and can also be connected by direct welding method. It is better than wear-resistant cast stone pipe, bi-metal composite pipe, steel-plastic pipe and steel rubber pipe, because these pipes are not easy to weld or can not be welded in construction.

 

-- Mechanical impact resistance

The self-propagating ceramic composite pipe has good mechanical impact resistance, and the composite layer does not rupture and fall off during transportation, installation and knocking, and self-weight bending deformation between the two brackets.

 

-- High abrasion resistance

The self-propagating ceramic composite pipe has high abrasion resistance and strong resistance to fluid scouring. In a single air duct, the elbow wears quickly, and the wear resistance of the self-propagating ceramic composite elbow is more than 5 times higher than that of the thick-wall wear-resistant cast steel elbow. Accompany the ender owner in the on-site inspection,  self-propagating ceramic composite pipe which is used in 1-2 years,  is opened and observed and measured , the composite layer has no obvious wear or shedding.

 

-- Lower weight and cost

In the same specification and unit length of the pipe, the self-propagating ceramic composite pipe weighs about 1/2 of the bimetallic composite pipe, its engineering cost per metre is reduced by 30-40%. And only about 2/5 of the weight of the cast stone pipe , and the engineering cost per meter is reduced by more than 20%.

 

-- High corrosion resistance

When the material with large grouting material is transported in the pipeline (such as ash, coal powder, mineral fine powder, tailings cement, etc.), there is a problem that the pipeline wears quickly, especially the elbow wears quickly; When there is a strong corrosive gas, liquid or solid, there is a problem that the pipe is corroded and is quickly destroyed; when the material having a higher temperature is transported in the pipe, there is a problem that the use of the heat-resistant steel pipe is very expensive. However with the self-propagating ceramic composite pipe available, these problems are solved.

 

Application

Power industry,

Metallurgy,

Coal,

Petroleum,

Chemical,

Building materials,

Machinery and other industries.