High Frequency Welded Solid and Serrated Finned Tubes, L LL KL KLM G Bimetallic Finned Tubes, Extruded Finned Tube Bimetallic Finned Tubes, H HH Finned Tubes, Integral High Finned Tubes, Integral Low Finned Tubes, Longitudinal Finned Tubes, Studded Tubes, Welded Stud Tubes, Fired Heater Tubes, Stud Fin Tubes, Fire Heater Tubes, Aluminum Fin Tubes, Helically Wound High Fin Tubes, G Type Fin Tubes, Embedded Fin Tubes, Edge Grooved Fin Tubes, L Type Fin Tubes, Shoulder Tension Fins Tubes, Wrap On Fins Tubes, KL Type Fin Tubes, LL Type Fin Tubes, High Frequency Welded Spiral Fin Tubes, HF Welded Fin Tubes, HRSG Tubes, Economiser Tubes, Types of Solid & Serrated Tubes, Welded Square Fin Tubes, Plate Fin Tubes, H Type Fin Tubes, Welded Rectangle Fin Tubes, Welded Trapezoid Fin Tubes, Oval Stud Tubes, Oval Welded Elliptical Stud Tubes, Oval Studded Tubes, Ship Boiler Tubes, Elliptical Stud Fin Tubes, Extruded Aluminum Fin Tubes, Bimetallic Fin Tubes

High Frequency Welded Solid and Serrated Finned Tubes

Product Specification

Tube Outside Diameter:	16 to 273 (mm)	3/8" to 10" (NPS)
Tube Wall Thickness:	2 to 28.6 (mm)	0.08" to 1.1"
Tube Length:	max 28000 (mm)	max 92 ft
Fin Thickness:	0.5 to 3.5 (mm)	0.02" to 0.14"
Fin Height:	8 to 35 (mm)	0.31" to 1.3"
Fin Pitch:	3 to 333 FPM	1 to 8 FPI
Fin Type:	Solid, "U" or "V" Serrated

Material

Fin Material:	C.S. (most common grade: 08F)
	S.S. (most common grade are AISI 304, 316, 409, 410, 321, 347, 2205)
	A.S.
Tube Material:	C.S. (most common grade: SA106 Gr.B)
	S.S. (most common grade are TP304, TP316, TP321, TP347)
	A.S. (most common grade are T/P5, T/P9, T/P11, T/P22, T/P91)

This table is used as a general guide to our capabilities, please call us for any other customized cases.

Welding Process

The steel fin, that may be solid or serrated, is helically wound and continuously welded to the tube by high frequency electric resistance welding (HFERW). This produces an homogeneous, clean and continuous fin-to-tube bond with no additional weld material, for a very efficient heat flow and resistance to corrosion.

Codes and Standards

- HG/T 3181-2009 High Frequency Resistance Welded Spiral Fin Tubes
- International Standard For Dimensions, Tolerances and Tests of High Frequency Resistance Welded Fins
- Client's Requirements or Technical Agreement if any

Surface Treatment and Protection

Each tube except stainless material will be polished by polishing machine to near white condition before welding.
After welding, the finned tubes will be coated with anti-rust oil for transportation and site storage purpose, normally the coat will provide a period of 3~5 months prevention, any other coating material for longer prevention is also available as per clients' requirements.

15 years experiences in manufacturing and supply of Extended Surface Tubes for the petrochemical, power generating and thermal industries.

We offer accepted products and efficient solutions centered on meeting and exceeding quality codes and standards. We provide competitive market price, short lead time and special customizing relied on a high level of communications and trust.

Our Quality

Our quality awareness stems from the roots of our being. Each product is produced as per customer specifications meeting or exceeding applicable codes and standards. Each product is inspected and related documents are maintained to ensure the compliance. Additional testing and Third Party Inspection Agency can be offered if required by customer for further assurance. We are always concentrated on improving the effectiveness of our Quality Management Systems.

Our Service

Our service means getting the job done the way customer want it done. We always have the customer in our mind at all times. We realize that the customers' needs are different and we have the ability to satisfy those needs. Whether processing on customer-supplied materials or supplying a job completely turnkey, you can always count on us.

Our Efficiency

We can work 24/7 to meet your needs. Our proprietary online quote system enables us to rapidly prepare the quotes and reply to you. Our shops can operate 24 hours a day by shifts to satisfy your urgent delivery time. We can also maintain emergency contacts anytime you need, no matter pre-sales or after-sales.

Our Package

Each package is designed and made according to seaworthy packing standard and clients' handling and lifting capability.
Finned tubes will be packed into steel frameworks and wrapped with weather proof PE film and plywood board covering up. In addition, each row of finned tubes will be isolated from adjacent with plywood bar to prevent rigid impact during transportation. For all exporting packages, we only use plywood instead of wood for fumigation free purpose.

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