H Fin Pipe Welding Machine for High-Efficiency Boiler Fin Tube Production

The H Fin Pipe Welding Machine is specially designed for the production of H-shaped fin tubes, which are widely used in utility boilers, industrial boilers, economizers, waste heat recovery systems, and flue gas heat exchangers. The machine can manufacture both single-tube and double-tube H fin tubes with high dimensional accuracy and stable welding quality.

The production line integrates pipe feeding, fin feeding, intermediate-frequency resistance welding, and PLC-based control into one efficient system. With adjustable welding pitch and programmable operating parameters, the machine offers excellent flexibility for different fin tube specifications and customer requirements.

- Steel pipe feeding trolley, step motor driving, precision 0.01mm

- Fin hopper and auto feeding devices, two – 3 x 200kVA intermediate-frequency welding transformers & controller

- Diode rectifier cabinet, one

- PLC + HMI control system

- Fin tube run-out rack, 7m long

- Pneumatic system – Cool water system

H fin tubes are a special type of extended surface heat transfer tube. Unlike spiral fin tubes, H fins are welded symmetrically on both sides of the tube, forming an “H” profile when viewed from the end.

Compared with conventional finned tubes, H fin tubes provide:

Larger heat transfer surface area

Lower flue gas flow resistance

Reduced ash accumulation

Improved heat recovery efficiency

Longer service life in boiler applications

These advantages make H fin tubes particularly suitable for economizers, air preheaters, and waste heat recovery equipment.

The machine uses intermediate-frequency resistance welding technology to achieve a strong metallurgical bond between the steel tube and H-shaped fins.

The production process includes:

Manual loading of steel tubes.

Automatic positioning and feeding by the precision pipe trolley.

Automatic fin feeding from the fin hopper.

Intermediate-frequency resistance welding.

PLC-controlled adjustment of fin pitch and welding length.

Finished fin tube unloading.

The welding pitch can be programmed in advance and even varied along a single tube length to meet special heat exchanger design requirements.

Main Advantages

High Welding Accuracy

The servo-driven feeding system ensures precise positioning with a feeding accuracy of up to 0.01 mm, helping maintain consistent fin spacing throughout the entire tube length.

Flexible Production

The machine can manufacture both single-tube and double-tube H fin configurations. Fin pitch, welding length, and production parameters can be customized through the PLC interface.

Stable Welding Quality

Equipped with dual 3 × 200 kVA intermediate-frequency welding transformers, the machine delivers stable heat input and reliable welding performance.

User-Friendly Control System

The PLC and HMI interface allow operators to easily monitor production status, adjust parameters, and improve production efficiency.

Reliable Components

Major electrical components including PLCs, touch screens, inverters, photoelectric sensors, and proximity switches are sourced from Panasonic, ensuring long-term operational stability.

 

Application Scenarios

The H Fin Pipe Welding Machine is widely used by:

• Boiler manufacturers
• Economizer manufacturers
• Heat exchanger fabricators
• Waste heat recovery equipment suppliers
• Power plant component manufacturers
• Industrial energy-saving equipment producers

The finished H fin tubes are commonly installed in:

• Boiler economizers
• Air preheaters
• Waste heat recovery systems
• Power station boilers
• Industrial furnace heat recovery units

 

Why Choose H Fin Tubes Instead of Conventional Finned Tubes?

Feature	H Fin Tubes	Conventional Spiral Fin Tubes
Heat Transfer Area	High	High
Ash Fouling Resistance	Excellent	Moderate
Flue Gas Flow Resistance	Lower	Higher
Boiler Economizer Application	Excellent	Good
Cleaning Performance	Better	Standard

For high-dust flue gas environments such as coal-fired boilers and waste heat recovery systems, H fin tubes often provide superior operational performance and easier maintenance.

 

Project Experience

Our H fin tube production equipment has been supplied to manufacturers serving boiler, economizer, and heat recovery industries. The machine is designed to meet the demanding requirements of large-scale fin tube production, ensuring consistent welding quality, dimensional accuracy, and long-term reliability.

With years of experience in fin tube manufacturing technology, Datang provides not only equipment but also technical support for process optimization and production line commissioning.

Frequently Asked Questions

What tube diameters can be processed?

The machine can be customized for different tube diameters according to customer requirements.

Can stainless steel tubes be welded?

Yes. The machine can be configured to process carbon steel, stainless steel, and other commonly used tube materials.

Can the fin pitch be adjusted?

Yes. Fin pitch and welding length can be preset through the PLC control system.

Is on-site installation support available?

Technical guidance for installation, commissioning, and operator training can be provided upon request.

Can the machine produce both single and double H fin tubes?

Yes. The production line is designed for both single-tube and double-tube H fin tube manufacturing.

Technical Specifications

[Keep your original specification table here without modification.]

No.	Item	Data
1	Fin section length error (in full length)	±2mm
2	Sectional length error	±0.5mm
3	Linear straightness of finished fin tube	Not more than 1.0mm per meter Not more than 3mm per 5 meters
4	Fin pitch error	±0.3mm
5	Fin pitch deviation at any 10 fins	≤0.5mm
6	Verticality between fin and tube	±0.5º
7	Height difference between fins in one pair	±0.1mm
8	Parallelism between fins in one pair	±0.2mm
9	Center distance between two tubes	±0.2mm
10	Welding transformer	3 x 200kVA, dry-type, isolation level F-grade; 60% duty cycle; compulsive water cooling
11	Active electrodes (wearing part)	CuCoBe alloy, stroke 100mm, welding force 2500N
12	Machine overall dimension	About 16 x 3.5 x 1.7m (L x W x H)
13	Machine weight	About 14 tons
14	Main configurations	PLC, touch screen, inverter, phototubes, approaching switches, reflectors are all Panasonic brand, original from Japan