Boiler Cooler 3.3mm Serrated Solid 32mm Helical Fin Tube

SA213-TP304H , NPS 2'' X SCH80S, continuous helical welded heat exchanger fin pipe

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.

Basis parameters for 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.

Our Service:

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

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

3. Our sales send the Proforma Invoice with our seal, or you order online to us

4. Customer make the payment for deposit and send us Bank receipt

5. Initial Production Stage-Inform the clients that we have got the payment, and will make the samples according to your request, send you photos or samples to get your approval. After approval, we inform that we will arrange the production & inform the estimated time

6. Middle Production-send photos to show the production line which you can see you products. Confirm the estimated delivery time again.

7. End Production-Mass production products photos and samples will send to you for approval. You can also arrange the third party inspection

8. Clients make payment for balance and ship goods, inform the tracking number and check the status for clients

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

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