Boiler Tube

Tianjin Lefin Industrial Co., Ltd is one of the most experienced manufacturers and suppliers of boiler tube in China. Please feel free to buy high quality boiler tube from our factory. Good service and reasonable price are available.

Boiler tubes are the key pipeline materials for transporting high-temperature and high-pressure media in boiler equipment. They are mainly used in thermal power plants, industrial boilers, centralized heating systems, as well as in chemical, metallurgical and other fields. They need to possess characteristics such as high temperature and high pressure resistance, corrosion and oxidation resistance, high strength and high toughness.

Boiler tubes are the core components that form the "vascular system" of a boiler, and they are specifically used for:

• Power plant boilers: water-cooled walls, economizers, superheaters, reheaters, main steam pipes, etc.
•  Industrial boilers: Supplying steam and providing heat exchange systems for industries such as chemical, textile, and paper manufacturing.
• Central heating: The hot water supply pipelines of the centralized heating system in northern regions.

• Resistant to high temperature and high pressure: Can operate stably for a long time at temperatures ranging from 450℃ to 650℃ and pressures above 9.8MPa.
• Corrosion and oxidation resistance: Resistant to corrosion and oxidation by media such as steam and smoke.
• Excellent mechanical properties: High strength and high toughness, ensuring safe pressure-bearing.
• Good thermal conductivity: Efficiently transmits heat energy.
• Strict process requirements: Must pass tests such as water pressure, flattening, expansion, and ultrasonic flaw detection.

The production of boiler tubes adheres to strict international standards, which mainly include:

The mechanical performance requirements for boiler tubes of different materials and standards vary. The following are the performance indicators of common grades:

• Medium-low pressure boiler tubes (such as 20# steel from GB3087) are typically used in working conditions with a temperature of ≤ 450℃ and a pressure of ≤ 5.88MPa. Their tensile strength is ≥ 410MPa and their yield strength is ≥ 245MPa.
• High-pressure boiler tubes (such as those made of alloy steel in GB5310) are used in ultra-supercritical and super-supercritical units, demanding higher temperature strength and creep resistance. For instance, 12Cr2MoWVTiB (G102) has a tensile strength of 540-735 MPa and a yield strength of ≥ 345 MPa.
• International standard differences: The American standard distinguishes between tubes (Tube, such as A213) and pipes (Pipe, such as A335), but the chemical composition is usually the same (such as T/P91). In the European EN 10216-2 standard, similar grades like X10CrMoVNb9-1 correspond to the American T/P91.

Currently, supercritical and ultra-supercritical power plant boilers mostly adopt high-performance materials such as T/P91 and T/P92 (corresponding to 12Cr2MoG and 10Cr9MoW2VNbBN in China), which exhibit excellent creep rupture strength at temperatures ranging from 600 to 625 degrees Celsius. These materials have become the main materials for units operating at the 600-degree level.