ASME A106 Gr.B Carbon Steel Studded Fin Tube for Refinery Fired Heater Convection Section

The ASME A106 Gr.B carbon steel studded fin tube is the most widely used finned tube solution for the convection section of fired heaters in oil refineries and petrochemical plants. Manufactured from seamless carbon steel base tube per ASME SA106 Grade B with resistance welded studs, it effectively extends the heat transfer surface in high-temperature flue gas service while resisting erosion and coking, ensuring long-term reliable performance in refinery fired heater convection banks. In crude distillation heaters, coker heaters and hydroprocessing charge heaters, the studded fin tube significantly improves thermal efficiency and reduces fuel consumption, while its open stud geometry allows soot blowers to clean the surface effectively during operation, minimizing fouling-related shutdowns and maintenance costs.

Material Analysis - ASME SA106 Grade B Carbon Steel

The base tube of this studded fin tube is manufactured from ASME SA106 Grade B seamless carbon steel, a material specifically qualified for high-temperature pressure service and widely specified for convection section tubing in refinery fired heaters. Its balanced chemical composition and controlled mechanical properties ensure reliable performance under continuous flue gas exposure, thermal cycling and soot blowing conditions.

Why ASME SA106 Grade B Suits Refinery Fired Heater Convection Section:

• High-Temperature Service Qualification: SA106 Gr.B is code-qualified for elevated-temperature service, providing stable strength within the operating envelope of convection section tubes under continuous flue gas heating.
• Excellent Weldability: The controlled carbon content ensures sound resistance stud welding and reliable shop fabrication without complex preheat procedures for standard wall thicknesses.
• Proven Flue Gas Performance: Decades of service in crude, vacuum, coker and hydroprocessing heater convection banks confirm its oxidation resistance and compatibility with soot blowing and steam air decoding cycles.
• Full Traceability: Supplied with ASME SA106 mill test certificates, hydrostatic testing and optional third-party inspection, meeting refinery procurement and quality requirements.
• Cost-Effective Reliability: Delivers the required high-temperature strength at significantly lower cost than alloy grades, making it the standard economic choice for convection section finned tubing.

Key Features

• Seamless A106 Gr.B Base Tube: Full-length seamless construction per ASME SA106 Gr.B, suitable for high-temperature and high-pressure service.
• Resistance Welded Studs: Studs are attached by advanced resistance stud welding, ensuring firm metallurgical bonding and excellent anti-vibration performance.
• Enhanced Heat Transfer: Studs effectively extend the heat transfer surface area, significantly improving thermal efficiency of fired heater convection banks.
• Anti-Coking & Erosion Resistant: Ideal for flue gas environments with high dust and coking tendency; easy to clean with soot blowers and maintain.
• Customized Dimensions: Stud diameter, stud height, pitch and arrangement (in-line or staggered) can be tailored to your process requirements.

Quality Assurance

All studded fin tubes are manufactured under strict quality control. Our factory holds a complete certificate system in the finned tube field: ASME certification, ISO 9001, ISO 14001 and ISO 18001 management system certificates, together with classification society approvals including ABS, LR, DNV-GL, BV, KR and CCS. Hydrostatic testing, material test certificates and third-party inspection (SGS, BV, TUV) are available upon request.

Applications

• Convection sections of fired heaters in oil refineries (crude heaters, coker heaters, charge heaters)
• Petrochemical plant furnaces and reformers
• Waste heat recovery boilers
• Ethylene cracking furnace convection banks