Material characteristics and pressure-bearing capacity of large-diameter internal and external plastic-coated steel pipes

First, material characteristics of large-diameter internal and external plastic-coated steel pipes:
1. Plastic coating layer: The inner and outer layers of large-diameter internal and external plastic-coated steel pipes are protected by plastic coating. This coating has good corrosion resistance and wear resistance, which can effectively prevent the inside of the pipe from being corroded by chemicals and microorganisms, and extend the service life of the pipe.
2. Steel matrix: The matrix of large-diameter internal and external plastic-coated steel pipes is made of steel, which has high strength and pressure resistance. This makes the steel pipe less likely to deform when under pressure, thereby ensuring the safety and stability of the pipeline.

Second, factors affecting the service life of large-diameter internal and external plastic-coated steel pipes
1. Material selection: The material selection of large-diameter internal and external plastic-coated steel pipes has a great influence on their service life. Generally speaking, good quality steel has a longer service life. Therefore, when choosing plastic-coated steel pipes, products made of steel should be selected as much as possible.
2. Use environment: The use environment of large-diameter internal and external plastic-coated steel pipes will also affect their service life. For example, factors such as temperature, humidity, and pH value will have a certain impact on the pipeline. During the design and use process, these factors should be fully considered to ensure the normal operation of the pipeline.
3. Maintenance: Large-diameter internal and external plastic-coated steel pipes need regular maintenance during use. For example, cleaning, anti-corrosion treatment, and other measures can effectively extend the service life of the pipeline. Therefore, during use, the maintenance of the pipeline should be strengthened.

Third, the service life prediction of large-diameter internal and external plastic-coated steel pipes According to current technology and experience, the service life of large-diameter internal and external plastic-coated steel pipes can usually reach more than 50 years. Of course, the specific service life needs to be determined according to actual use conditions and maintenance conditions.

Fourth, how much pressure can large-diameter internal and external plastic-coated steel pipes withstand:
1. The pressure-bearing capacity of large-diameter internal and external plastic-coated steel pipes depends on the quality of the material and the design of the pipeline. Generally speaking, large-diameter internal and external plastic-coated steel pipes have a higher pressure-bearing capacity and can withstand greater pressure. However, in actual projects, we need to choose suitable pipes according to the specific use environment and engineering requirements.
2. The pressure-bearing capacity of large-diameter internal and external plastic-coated steel pipes is also affected by the installation and use process. During the installation process, it is necessary to ensure that the pipeline connection is firm and the sealing is good to prevent problems such as water leakage. During use, it is necessary to regularly check the operation of the pipeline and perform maintenance and upkeep on time.
3. The pressure that large-diameter internal and external plastic-coated steel pipes can withstand is also related to the diameter and wall thickness of the pipe. Generally speaking, the larger the diameter and the thicker the wall thickness, the greater the pressure that the pipe can withstand.

Fifth, the advantages of large-diameter internal and external plastic-coated steel pipes:
1. Strong corrosion resistance The large-diameter internal and external plastic-coated steel pipes use epoxy resin and polyethylene as coating materials, which have strong corrosion resistance. This kind of pipe material can withstand the erosion of chemicals such as acids, alkalis, and salts, and is suitable for environments that transport corrosive media.
2. Good wear resistance The inner wall of large-diameter internal and external plastic-coated steel pipes is smooth and has a small friction coefficient, so it has good wear resistance. This allows large-diameter internal and external plastic-coated steel pipes to reduce pipe wear and extend the service life of pipes when conveying abrasive media.
3. High compressive strength Large-diameter internal and external plastic-coated steel pipes have high compressive strength and can withstand greater pressure. This enables it to ensure the safe and stable operation of the pipeline when conveying high-pressure media.
4. Low thermal resistance coefficient Large-diameter internal and external plastic-coated steel pipes have low thermal resistance coefficients and good thermal insulation performance. This allows it to effectively reduce heat loss and energy consumption when transporting high-temperature media.
5. Easy installation and simple maintenance Large-diameter internal and external plastic-coated steel pipes are light in weight, high in strength, corrosion-resistant, and not easy to scale, making their installation and maintenance very convenient. In addition, since its surface coating can prevent the growth and adhesion of bacteria, it also has broad application prospects in hospitals, laboratories, and other places.

Sixth, the application field of large-diameter internal and external plastic-coated steel pipes
1. Chemical industry: Large-diameter internal and external plastic-coated steel pipes can be used to transport corrosive, abrasive, high-temperature, and other media, such as acid, alkali, salt, petroleum, chemical raw materials, etc.
2. Construction industry: Large-diameter internal and external plastic-coated steel pipes can be used to transport hot and cold water, air conditioning water, fire water, and other media, and are widely used in building water supply and drainage systems.
3. Natural gas industry: Large-diameter internal and external plastic-coated steel pipes can be used to transport flammable and explosive media such as natural gas, with good safety performance.
4. Pharmaceutical industry: Large-diameter plastic-coated steel pipes can be used to transport pharmaceutical intermediates, drugs, and other media to ensure safe and pollution-free transmission of drugs.
5. Environmental protection industry: Large-diameter plastic-coated steel pipes can be used in sewage discharge, wastewater treatment, and other fields to effectively prevent pollutants from harming the environment.