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DELLOK Helical Heat Exchanger serrated 0.8mm Round Steel Tubing

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DELLOK  Helical Heat Exchanger serrated 0.8mm Round Steel Tubing
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Tube OD: 19mm Min
Tube Length: 18 Meters Max
Fin Height: 32 Mm Max
Fin Thickness: 0.8mm Min
Fin Pitch:: Min. 4 Mm For Solid Fins & 3.3mm For Serrated Fins.
HFW Fin Type:: Solid Plain And Serrated.
High Light:

Serrated 0.8mm Round Steel Tubing


0.8mm Pipe Seamless Carbon Steel


EN 10204 Helical Finned Tube

Basic Infomation
Place of Origin: China
Brand Name: DELLOK
Certification: CE. ISO,EN10204. 3.1 Cert.
Model Number: HFW
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 1 month on recepit of order.
Payment Terms: L/C, T/T Contact us for details
Supply Ability: 60000 meters month
Product Description

Helical Heat Exchanger Serrated 0.8mm Round Steel Tubing


Product Details
Tube details: Tube OD: 19mm min.
Tube Length: 18 meters max.
Fin Height: 32 mm max.
Fin Thickness: 0.8mm min
Fin Pitch: min. 4 mm for solid fins & 3.3mm for serrated fins.
Production Capacity: Daily production capacity up to 40 tons;
HFW Fin type: solid plain and serrated.
SA179 Carbon Steel Tube , Welded Helical Steel Fin Tube for HRSG Boiler


Application: Seamless Carbon Steel Boiler Tubes For High-Pressure Service.


Quick Detail:


High Frequency Resistance Welded Helical Steel Fin Tubes is widely used in the recovery of waste heat from boiler flue gas.



General Manufacturing Process: The fin strip is welded continuously and spirally wound onto a polished bare tube. And the tube and fins are bonded together by using high frequency resistance welding technique.

We produce both solid plain and serrated helical welded steel finned tube. And also, all spiral welding tubes could be bent in the middle or at the end of fin tubes, we call it Hairpin tubes.


Additional Services for Solid helical welded fin tubes:

  1. High frequency welding machine output power supply: 200KW or 300KW
  2. The High Frequency Resistance Welded Spiral Fin Tube quality is assured by hydrostatic or pneumatic tests and tensile tests in order to verify the mechanical bonding between bare tube and fin materials.
  4. Visual check: un-welded parts of fin, fin damage after fining, copper pollution, tears, wrap etc…
  5. Dimensional check: fin height, fin spacing, fin inclination, fin corrugation, length of finned & un-finned portion etc…
  6. Bending check: ovality, thickness and area reduction.
  7. Coating: outside-Red oxide zinc phosphate primer and inside volatile corrosion inhibitor (VCI) in water soluble tablet form.
  8. Fin end finish: Bevel(30~35degeree)
  9. Delivery condition: Tube ends are square cut, free burrs, internally dried and air blown clean, externally coated with varnish at both ends of helical welded tubes. The desiccants are put into the each package for continental transportation as well.
  10. Documentation shall include QAP, WPS, PQR& WPQ, raw materials mill certificates, inspection and test samples results and warranty certificate of manufacturer.


The High Frequency Resistance Welded Helical Fin Tubes are widely applied in fired heaters, heat exchanger, boilers, economizers, pre-heaters, coolers, heat pipes, heaters etc….



A wide range of fin and tube materials could be combinations are available.

Items General Materials Popular ASTM Materials
Core Tube Material

Carbon Steel , Alloy Steel, Heat Resistant Steel,

Stainless Steel etc.

10#,20#,15CrMo,Cr5Mo,Cr9Mo,1Cr18Ni9Ti,0Cr18Ni9, 00Cr17Ni14Mo2,SA106B,SA106C, SA192, SA179,

SA178,SA214, SA210-A1, SA210-C,TP304/304L/304H, TP409/410,TP316/316L,TP321/321L,TP347H,T11,T22,T91,etc.


Fins Material

Carbon Steel , Alloy Steel, Heat Resistant Steel,

Stainless Steel etc.

Q235-BF,08F,08AL, 1Cr18Ni9Ti, 0Cr13, 1Cr13, 0Cr18Ni9, 09CrCuSb, CS,A1008-B,SPHC, SPCC, TP304/304L,TP316/316L,TP321/321L,etc.


Dimensions Data Sheet We Can Supply.

Solid Helical Steel Fin Tubes Fabrication Range Solid fins(mm) Serrated fins
Min Max Min Max
Tube OD(mm) 19 219 19 219
Fin Height(mm) 8 26 8 32
Fin Thickness(mm) 0.8 2.8 1 1.6
Fins Density(mm) 4(250FPM) 20 3.3(303FPM) 20
Tube Length(mm) N/A 18000 N/A 18000

Additional supply range :

(1) Tube swaging process for joint of 2 tubes.

(2) Spacer rings (material: steel) are available.

(3) One side is solid plain fins and the other is serrated fins, 2 fin types on same tube.


Our Service:

1. Inquiry-Professional quotation, or send inquiry item more details

2. Confirm the price, lead time, payment term etc

3. Proforma Invoice send or online

4. Make the samples according to your request, send you photos or samples, arrange the production

5. Send the production line photos Confirm the estimated delivery time again.

6. End Production-Mass production products photos and samples will send to you for approval.

7. Inform the tracking number and check the status for clients

8. Order can be say "finish" when you receive the goods and satisfy with them

9. Feedback to our about Quality, Service, Market Feedback & Suggestion. And we can do better


DELLOK  Helical Heat Exchanger serrated 0.8mm Round Steel Tubing 0DELLOK  Helical Heat Exchanger serrated 0.8mm Round Steel Tubing 1DELLOK  Helical Heat Exchanger serrated 0.8mm Round Steel Tubing 2

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Contact Person : Pax Yang
Tel : +862569521609
Fax : 86-25-6952-5709
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