H HH Finned Tubes Square or Plate Fin Type Finned Tubes, High Frequency Welded Solid and Serrated Finned Tubes, L LL KL KLM G Bimetallic Finned Tubes, Extruded Finned Tube Bimetallic 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

H HH Finned Tubes Square or Plate Fin Type Finned Tubes

Product Specification

Tube Outside Diameter:	25 to 73 (mm)	1/2" to 2 1/2" (NPS)
Tube Wall Thickness:	3.0 to 6.0 (mm)	0.118" to 0.236"
Tube Length:	max 18500 (mm)	max 60.7 ft
Fin Thickness:	1.5 to 4.0 (mm)	0.060" to 0.157"
Fin Height:	25 to 45 (mm)	0.98" to 1.77"
Fin Length:	50 to 250 (mm)	1.97" to 9.8"
Fin Pitch:	20 to 117 FPM	1 to 3 FPI
Fin Type:	H, HH

Material

Fin Material:	C.S. (most common grade: Q235B)
	S.S. (most common grade: AISI304, 316, 321, 347, 409, 410)
	A.S. (most common grade: 12Cr1MoV)
Tube Material:	C.S. (most common grade: SA106 Gr.B)
	S.S. (most common grade: 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

Square finned tube can be manufactured in almost any shape or size. This style of fin is commonly referred to as "Square Fin" or "Plate Fin". Although any shape is possible, square and round are the norm. An electric current is applied by contacts on the square fins (by using special contours) and tube and the resistance in this circuit produces the heat necessary for welding. Maximum resistance and therefore maximum heating occur at the interface between the fin and the tube. Pressure to forge the square fins and the tube together at the point of maximum heating is applied by various forms of tooling. These resistance welding processes produce a strong metallurgical bond between the fin and the tube while minimizing the heat affected zone (HAZ) in the tube.

Codes and Standards

- As per drawings and client's requirements

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 for transportation and site storage purpose, normally the coat will provide a period of 3 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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