Our stainless steel tubing for various types of boilers and heat exchangers excels in resisting high temperatures and corrosive environments. The use of stainless steel or high performance alloys ensures longevity and reliability, even under harsh conditions, where ordinary carbon steel may corrode or degrade. These tubes are ideal for industrial processes, including power generation, chemical processing and oil refining.
Common challenges for boiler tube
Boiler tubes face a wide range of challenges, depending on the specific application and operating conditions. Common challenges include the following:
1. Corrosion: This is a significant concern in boiler tubes, particularly in environments with high temperatures, high pressures, and corrosive substances present in the heated fluid. Corrosion can weaken the tubes, leading to leaks or ruptures.
2. Scale and deposits: Scaling and deposition of minerals and other impurities on the inner surface of boiler tubes can reduce heat transfer efficiency and lead to overheating, which can cause tube failure. Regular cleaning and water treatment are necessary to mitigate this issue.
3. Thermal Stress: Boiler tubes experience significant thermal stress due to rapid temperature changes during start-up, shutdown and operation. This thermal cycling can lead to fatigue failure over time, especially in areas with welds or other discontinuities.
4. Erosion and Abrasion: In certain boiler applications, such as those involving high-velocity fluid flows or abrasive substances, erosion and abrasion of the tube surfaces can occur. This can lead to thinning of the tube walls and eventual failure if not addressed.
5. Creep: At high temperatures and pressures, boiler tubes may experience creep, which is the slow deformation of metal over time under constant stress. Creep can lead to distortion and ultimately tube failure if operating conditions exceed the material's creep resistance.
6. Water Chemistry Issues: Poor water chemistry control can lead to corrosion, scale formation, and other issues within boiler tubes. Controlling parameters such as pH, dissolved oxygen, alkalinity, and conductivity are crucial to preventing tube damage to and ensuring efficient operation.
7. Material Selection: Choosing the right material for boiler tubes is essential to ensure they can withstand the specific operating conditions they will face. Factors such as temperature, pressure, corrosion resistance, and mechanical properties must be carefully considered during material selection.
Addressing these challenges requires a combination of proper design, material selection, maintenance practices, and water treatment strategies to ensure the safe and efficient operation of boiler systems. Regular inspection, testing, and monitoring of boiler tubes are also essential to identify potential issues early and prevent costly downtime or accidents.
Our products are used in most types of boilers, such as:
- Advanced ultra supercritical (AUSC) boilers
- Biomass-fired boilers
- Black liquor recovery boilers
- Coal-fired power boilers
- Concentrated solar power (CSP) boilers
- Reheaters
- Superheaters
- Syngas coolers
- Waste heat boilers
Increased efficiency in coal-fired power boilers
Our new material Sanicro® 25 is engineered for the next generation of coal-fired power boilers, contributing to significantly greater efficiency and sharply lower CO2 emissions. Sanicro® 25 is ideal for superheater and reheater tubes, allowing for material temperatures of up to 700ºC (1290ºF).
Read more about Sanicro® 25.
Wide variety of boiler applications
The Alleima program provides a wide range of tubes for many types of boiler applications. We offer, for example, superheater tubes and reheater tubes in a comprehensive range of stainless steels and nickel alloys. We also produce composite tubes, consisting of two different alloys fully bonded together.
Our products are used in most types of boilers, such as:
- Advanced ultra supercritical (AUSC) boilers
- Biomass-fired boilers
- Black liquor recovery boilers
- Coal-fired power boilers
- Concentrated solar power (CSP) boilers
- Reheaters
- Superheaters
- Syngas coolers
- Waste heat boilers
Increased efficiency in coal-fired power boiler
Sanicro® 25 is our advanced material engineered for the next generation of coal-fired power boilers. It significantly enhances efficiency and reduces CO2 emissions. Sanicro® 25 is ideal for superheater and reheater tubes, withstanding material temperatures of up to 700ºC (1290ºF). Read more about Sanicro® 25.
Fully integrated manufacturing sets us apart
From advanced R&D to one controlled melt, to extrusion of hollows and final boiler tube manufacturing, we ensure the very highest quality and full traceability.
Quality Management, safety and sustainability
Alleima has quality management systems approved by internationally recognized organizations. Approvals (USA): ASME Code Case 2982. Boiler and Pressure Code, Section VIII, Division I and II. Approvals (EU): Pre-approval for Particular Material Appraisal (PMA), TÜV file 1326W043219. We are committed to the UN Sustainability Goals (SDGs) and Science Based Targets initiative (SBTi).