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

DIN 17175 ST35.8 / I SMLS Carbon Steel Square H Fi
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  • Fax:+86 25 69755709
  • Email:commercial@bestfintube.com
Description

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

Standard

DIN17175

Material

St37.2,St35.4/8,St42,St45,St52,St52.4,

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

STP G38,STP G42,STPT42,STB42,STS42,STPT49,STS49

End protection

Plastic Caps

Outside coating

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

Packing

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

 

General H type Fin production capacity

General specifications of H type fin tubes

Production Facility: 6 finning machines;
Daily capacity up to 20 tons;

Tube OD: 73 mm max.
Tube Length: 18 meters max.
Fin Thickness: 1.5mm ~3.5mm
Fin Pitch: 10mm Min.

 

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.
 
Applications:

  1. Economizers ,

  2. Heat exchangers

  3. Marine boilers

Specifications:
 

ItemsGeneral MaterialsPopular 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

Studs
Material 

 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.


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