As the industry progresses, so does the demand for pipe fittings. According to the number of branches of pipe fittings, pipe fittings can be divided into tee pipes and tee pipes, and tee pipes can be divided into the metal tee and non-metal tee according to different materials. Among the many non-metal tees, The more common is the ceramic lined tee pipe.
The ceramic lined tee pipe is composed of three parts: corundum ceramic, transition layer, and steel. The ceramic layer forms dense corundum porcelain at a high temperature above 2200 ℃ and creates a strong bond with the steel pipe through the transition layer. It has good wear resistance, heat resistance, corrosion resistance, mechanical shock resistance, thermal shock resistance, weldability, and other comprehensive properties. It is an ideal wear-resistant and corrosion-resistant pipeline for conveying granular materials, grinding corrosion, and other media.
Ceramic technical parameters
|Content of alumina||≥92%||≥95%|
|Rockwell A hardness||≥82HRA||≥85HRA|
|Impact strength||≥1200 MPA||≥1500 MPA|
Good wear resistance: Since the ceramic lined tee pipe is corundum ceramic, its hardness can reach 9.0, which is equivalent to HRC 90. Therefore, it is widely used in metallurgy, electric power, mining, coal, and other industries.
Low running resistance: The inner surface of the ceramic tee pipe is smooth and will not be corroded, unlike the convex helix on the inner surface of the seamless steel pipe, the flatness of the inner surface of the test device is better than that of any metal pipe, and the gap resistance coefficient is 0.0193, slightly lower For seamless pipes, it has the characteristics of low operating resistance, which can reduce operating costs.
Good high-temperature resistance: Since corundum ceramic is a single stable crystal structure, the composite material can work normally for a long time in the temperature range of minus 50 degrees to 700 degrees, and its linear expansion coefficient is 6-8×10-6/ 0C, about half of the steel pipe, has good thermal stability.
Low project cost: The ceramic tee has lightweight, has good wear and corrosion resistance, long service life, has a low installation cost, and a low operating cost. Compared with the wear-resistant alloy pipe, the engineering cost of the ceramic tee is reduced by about 20%.
Convenient construction and installation: Due to the light weight of the ceramic pipe, welding, flange, quick connection, and other methods can be used, which is convenient for construction and installation, and can reduce installation costs.
How to Avoid Ceramic Falling Off
1. The wear-resistant ceramic patch is pasted to the surface of the steel part, and the rust removal must be thorough. In order to obtain a good construction effect, the steel part must be pretreated by sandblasting. It is also necessary to wipe the steel surface with acetone to achieve a certain degreasing and ash removal effect;
2. Pay attention to the proportion of wear-resistant ceramic glue, the proportion of glue is not suitable and cannot reach the predetermined viscosity;
3. The wear-resistant ceramic glue needs to be applied evenly. After the construction is completed, it should be gently tapped with a rubber hammer to ensure that the construction surface is flat;
4. Pay attention to the working temperature before construction of wear-resistant ceramics, and choose glues with different temperature resistance at different temperatures, otherwise the wear-resistant ceramic patches will easily fall off as the temperature rises;
Construction technology and process
The construction steps of wear-resistant ceramics are generally to repair, polish, glue, apply glue, paste, and cure the equipment first. Special products also need welding and other work.
The construction work of wear-resistant ceramics is divided into adhesive type, direct-adhesive type, impact-resistant type, cemented type, assembly type, heat-resistant adhesive type, cold-resistant adhesive type, wear-resistant ceramic lining and lining, which can be used for wear-resistant bending Head, wear-resistant straight pipe, wear-resistant tee, wear-resistant special-shaped pipe fittings, and other wear-resistant ceramic pipes.
During the operation of the equipment, due to the constant friction, corrosion, collision, and impact of the hard medium, the system is prone to leakage, resulting in environmental pollution. Therefore, various manufacturers pay more attention to the construction of wear-resistant ceramics, and the requirements are very high. The anti-wear of equipment is a systematic project. The construction methods adopted by different manufacturers are different, and the results will be very different.