New Zealand
    Reliance has looked after us really well , and most because of your good service and products quality.
    You did show a full professional way of doing business industrial deal. Im very happy that i have the opportunity to cooperate with u and ur company.
    Quick response,good price, excellent delivery date and service, of course, the best quality.
Contact Person : Jennifer
Phone Number : +86-1381 2020 947
WhatsApp : +8613812020947

BS3059 OD 2" HH Fins Marine Boiler Square Fin Tube With 90 Degree Bends

Place of Origin China.
Brand Name Reliance
Certification CE,ISO...
Model Number HH FIN
Minimum Order Quantity N/A
Price N/A
Packaging Details (1) Waterproof steel frame bundle with each end capped; (2) Steel frame case sealed by plywoods with each end capped.
Delivery Time Ex-work within 5 weeks after order.
Payment Terms T/T, L/C
Supply Ability Daily capacity up to 3,000 Meters

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Product Details
Company Type Manufacturer Fin Tube Type H Fin Or HH Fin
Fins Shape Square Or Rectangular Tube Material Carbon Steel, Stainless Steel, Alloy Steel... No Limit
Fin Material Carbon Steel, Stainless Steel, Alloy Steel... No Limit Surface Painting Black Or Red
Tube Nos Of HH 2 Pieces Of Plain Tubes
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90 Degree Bends Square Fin Tube


Marine Boiler Square Fin Tube


BS3059 boiler fin tube

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Product Description

BS3059 PT 2 GR 360 , OD 2'' , HH Fins Marine Boiler Tube with 90 Degree Bends 

Description of BS3059 Tubes


For high, middle, low pressure boiler and pressure purpose.

Steel Grade

 BS3059-Ⅰ 320 CFS

End protection

Plastic Caps

Outside coating

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

Surface treatment

Oil,varnish,Passivation,Phosphating,Shot Blasting

Inspection and test

Chemical Composition Inspection,Mechanical Properties Test.

Surface and Dimension Test, Non-destructive Test, Hydrostatic Test.

Delivery condition

 Annealed, Normalized, Normalized and tempered


 General fin tube production capacity General specfications of HH(Double H) fin tube

 Production Facility: 6 finning machines;

 Daily capacity up to 20 tons;

 Tube OD: 51 mm max.

 Tube Length: 18 meters max.

 Fin Thickness: 1.5mm ~3.5mm

 Fin Pitch: 10mm Min.


Manufacturing Process
Square or Rectangular  Fins are welded on 2 steel base tubeS. We call it HH or Doule 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


Items 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...



Why we choose HH welding fin tube: High efficiency, minimum power loss, easy cleaning.

Descriptions of HH Fin Tube

Popular Specifications we make

Tube OD(mm)

   25mm to 51mm

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.