Boilers, as high-temperature and high-pressure equipment, have their tube selection directly impacting operational safety and service life. Correct material selection must not only consider current usage needs but also provide guarantees for the long-term safe operation of the equipment. The core of selection lies in choosing materials according to the working temperature grade, ensuring perfect matching between material properties and service conditions.

Material Selection Principle by Temperature

Low-Temperature Zone (≤450°C)

Recommend using 20G carbon steel tubes, suitable for economizers, water-cooled walls, and other components. This material offers excellent plasticity and weldability, with mature processes and high cost-effectiveness, fully meeting the requirements of low-pressure boilers.

Medium-Temperature Zone (450-580°C)

Alloy steel tubes are required. 15CrMoG is suitable for superheaters below 550°C; its chromium-molybdenum alloy composition provides better hot strength. 12Cr1MoVG offers superior performance; the addition of vanadium refines the grain structure, allowing its use in high-temperature pipelines below 580°C. Both materials possess excellent hot strength and microstructural stability.

High-Temperature Zone (≤650°C)

High-performance materials such as T91/P91 must be selected. These martensitic heat-resistant steels, through complex alloy design, exhibit exceptional creep resistance and high-temperature strength, making them the preferred choice for critical sections in supercritical units.

Key Considerations for Material Selection

Beyond the core factor of working temperature, it is essential to comprehensively consider working pressure, medium characteristics, expected service life, and cost budget. Simultaneously, it is crucial to recognize that the production process and quality control of the materials are equally important as the material selection itself. Always choose reputable manufacturers possessing the special equipment production license.

Recommended Professional Supplier

Changzhou Tenjan Tube Co., Ltd., as a professional supplier of seamless boiler tubes, holds significant advantages in this field. The company possesses complete qualifications, complying with all requirements for boiler tube production.

Regarding technical capability, Tenjan Tube is equipped with comprehensive production and testing equipment. It features advanced heat treatment production lines capable of precisely controlling key process parameters such as normalizing and tempering. Furthermore, it is equipped with testing instruments including spectrometers, ultrasonic flaw detectors, and universal testing machines, ensuring strict control over every step from raw materials to finished products.

It is worth specifically mentioning that Tenjan Tube has established a complete quality traceability system. Each batch of products is accompanied by detailed material certificates, heat treatment reports, and test reports. This rigorous quality management approach ensures stable and reliable product performance, providing customers with ample quality assurance.

The company specializes in the manufacturing of alloy steel and high-pressure boiler tubes, possessing deep understanding and extensive practical experience in the composition control and heat treatment processes of materials like 15CrMoG and 12Cr1MoVG. Whether for standard products or special requirements, Tenjan Tube can provide professional technical selection advice and comprehensive after-sales service.

Selecting suitable boiler tube materials is a technical task that requires comprehensive consideration of multiple factors. It is recommended to fully communicate with professional suppliers like Tenjan Tube. Based on the specific design parameters and operating conditions of the boiler, choose the most scientific and reasonable tube material solution to ensure the safe and stable operation of the boiler equipment.