SS409/SS410 of fin materials are welded onto TP304 /TP304L, spiral fin tube heater , solid & serrated fins
ASTM A240/A240M : Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications

Quick Detail:

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

Description:

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.
3. Acceptance criteria: INTERNATIONAL STANDARD FOR DIMENSIONS, TOLERANCES, AND TESTS OF HIGH FREQUENCY RESISTANCE WELDED FINS or the delivery conditions (TDC) of clients.
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.

Applications:

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….

Specifications:

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

Dimensions Data Sheet We Can Supply.

Competitive Advantage:

1. We have more than 10,000 square meters workshop, including 4 ERW high Frequency welding fining lines, daily production capacity around 40 Tons;
2. Our quality assurance plan for High Frequency Welding Spiral Steel Tubes. (2.1) Raw material control for both plain tubes and fins. (2.2) In process control with reports,as WPS, PQR&WPQ; weld deposition efficiency test before fabrication, Non-destructive test and tensile test etc. (2.3) Final inspection control with reports (Visual and dimensional check etc…).
3. The High Frequency Resistance Welded Fin Tube is integrally extended for the max surface area to achieve efficiency. The heat transfer ratio of high frequency welding fin tube is about 8~9 times higher than other plain tubes.
4. This Welded Helical Fin Tubes is a singular integral unit, eliminating heat contact resistance and losses. Generally tube side temperature up to 800 degree for stainess steel fins; Low carbon steels, withstanding up to 475 degree is the most common choice.

About Reliance

Jiangsu Reliance Thermal Equipment Co., Ltd is all about thermal transfer finned tubes products. We have a long-term fabrication and supply experience in the business of FINING MACHINES and FINNED TUBES used in air-cooled heat exchanger, economizers, boilers, gas turbines, refining and petrochemical industries ect.

Advantages

• One-stop manufacturer shop from core tube supply to fin tube machines
• ISO 9001:2015 certified company
• Experienced and dedicated management and qualfied manpower
• Quickest response, competitive price, highese quality and shortest schedule
• Tube stock availability for general grades of carbon steel and stainless steel
• Technical support services for fin tube machines and replacement accessories

FINNED TUBES PRODUCTS & SERVICE AVAILABLE

Fabrication Capacities

(1)  Fourteen extrusion fining lines, daily capacity around 15,000 meters

(2)  Five type L/LL/KL fining lines, daily capacity around 5000 meters

(3)  Seven G- base fining lines, daily capacity around 7000 meters

(4)  Two ERW studding lines, daily capacity around 80000 studs

(5)  Four ERW High Frequency Spiral fining lines, daily capacity around 30 tons

(6)  Three bending machines, maximum capacity 76X4

(7)  Five DC ERW H/HH fining lines, daily capacity around 20 tons

(8)  One PLC high speed punch presser 

Reliance have become a qualified manufacturer and reliable supplier for high-quality thermal transfer finned tubes used in air-cooled heat exchanger,economizers,boilers,gas turbines,refining and petrochemical industries ect.

If you are interested in any of our products, please do not hestitate to contact us @reliancemfg@126.com