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DELLOK HH Fin Bends​ DIN 17175 304 Stainless Steel Square Tube

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DELLOK HH Fin Bends​ DIN 17175 304 Stainless Steel Square Tube
Features Gallery Product Description Request A Quote
Fin Tube Type: H Fin Or HH Fin
Tube OD: 73 Mm Max.
Tube Length: 18 Meters Max.
Fin Thickness: 1.5mm ~3.5mm
Standard: DIN17175
Fin Pitch: 10mm Min.
High Light:

1.5mm 304 Stainless Steel Square Tube


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Basic Infomation
Place of Origin: China
Brand Name: DELLOK
Certification: CE. ISO,EN10204. 3.1 Cert.
Model Number: HH FIN
Payment & Shipping Terms
Packaging Details: (1) Waterproof steel frame bundle package;(2)Steel frame case sealed by plywoods with each end capped.
Delivery Time: Ex-work within 5 weeks after order.
Payment Terms: L/C, T/T Contact us for details
Supply Ability: 60000 meters month
Product Description

H HH Fin Bends​ DIN 17175 304 Stainless Steel Square Tube


DIN 17175 ST35.8 / I SMLS Carbon Steel Square H Fin Tubing with 90 Degree Bends​






A53B, A106B, API5LB,X42,X46,X52,X60, X65


End protection

Plastic Caps

Outside coating

Black painting, anti-corrosion oil, galvanized or as per required by customers


wooden boxes, plastic film bags or according to different customers’ requests

Inspection and test

UT, ET, HT, RT, etc. and others according to the standard, or as the requests of the customers

Delivery condition

Annealed, Normalized, Normalized and tempered


Product Details

Tube details:

Tube OD: 73 mm max.

Tube Length: 18 meters max.

Fin Thickness: 1.5mm ~3.5mm

Fin Pitch: 10mm Min.

Production Capacity:

Daily capacity up to 20 tons;


Manufacturing Process

Square or Rectangular H Fins are welded on a steel base tube. We call it H Fin Type Tubing.

Acceptance Criteria
Approved drawing and the delivery conditions (TDC) of clients.

Additional Services
Tube swaging, elbows, bends(90° / 180° or as per client's design).

Quality Tests
The Square or Rectangualr H Finned Tube quality is assured by hydrostatic or pneumatic tests, eddy current tests and tensile tests in order to verify the mechanical bonding between inner tubes and outer fins.

Surface Coating
Outside-Red oxide zinc phosphate primer and inside volatile corrosion inhibitor (VCI) in water soluble tablet form.

Delivery Condition: Tube ends are square cut, free burrs, internally dried and air blown clean, externally coated with varnish at both ends of Square or Rectangualr Fin Tube.


  1. Economizers ,

  2. Heat exchangers

  3. Marine boilers



General Materials

Popular ASTM /ASME Materials

Core Tube Material

Carbon Steel
Alloy Steel
Heat Resistant Steel,
Stainless Steel

1. Carbon Steel: A106 / A179 /A192 / A210 etc...
2. Stainless Steel: TP304/304L,TP316/TP316L, TP347 etc...
3. Alloy Steel: P5,T5,P9,T9,T11,T22


Carbon Steel
Stainless Steel

1. Carbon Steel
2. Stainless Steel:
TP409/410,TP304/304L,TP316/TP316L etc...


Dimensions Data Sheet We're Supplying.

General Descriptions of H-fins

Popular Specifications we make

Tube OD(mm)

25mm to 73mm

Tube Wall thickness(mm)

2.5mm Min.

Tube length(mm)

18000mm Max.

Fin thickness(mm)

1.5mm to 3.5mm

Fin pitch(mm)

10mm Min.

Please email us for more information.

Competitive Advantage:

  1. We have more than 10,000 square meters workshop, including 6 H-FIN TYPE finning machines, daily extrusion capacity up to 20 tons.

  2. The Square or Rectangular Fins H-Finned Tubes are the preferred tube choice for high pressure boilers.

  3. Fins can be manufactured by stamping process in almost any shape and size.

  4. In-line fin and tube spacing allows for cleaning with excellent choice in sooting or fouling atmospheres.

  5. Fin height and spacing are limited only by heat transfer considerations.

  6. Fins and tubing can be similar or dissimilar metals.

DELLOK HH Fin Bends​ DIN 17175 304 Stainless Steel Square Tube 0DELLOK HH Fin Bends​ DIN 17175 304 Stainless Steel Square Tube 1DELLOK HH Fin Bends​ DIN 17175 304 Stainless Steel Square Tube 2

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Get in touch with us
Contact Person : Pax Yang
Tel : +862569521609
Fax : 86-25-6952-5709
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