Delfin Tubes

You are in: Products > Welded Finned Tubes

Welded Finned Tubes

FINNED TUBES

FINNED TUBES

FINNED TUBES WITH WELDED RETUNR BENDS

FINNED TUBES WITH WELDED RETUNR BENDS

SERRATED AND SOLID FIN TYPES

SERRATED AND SOLID FIN TYPES

FINNED TUBE BUNDLE

FINNED TUBE BUNDLE

BENDING OF FINNED TUBES BARE ENDS

BENDING OF FINNED TUBES BARE ENDS

HIGH FREQUENCY FINNING MACHINE

HIGH FREQUENCY FINNING MACHINE

FINNED TUBE HAIRPINS

FINNED TUBE HAIRPINS

BENDING OF TUBES OVER FIN

BENDING OF TUBES OVER FIN

 

Manufacturing Process

L. P. S. p. A. Steel Fin Tubes are helically wound and continously welded to the tube by high frequency electric resistance welding of solid or serrated steel fins. This produces an homogeneous , clean and continous fin - to - tube bond with no additional weld material, for a very efficient heat flow and resistance to corrosion.

This manufacturing process is carried out under strict standards. We also produce finned tubes with intermediate plain portions where required.

The use of high-frequency current results in very localised heating of the tube surface and the edge of the fin. This skin effect produces higher weld speeds, hence post-weld heat treatment is not considered necessary because of the superficial nature of the changes in the microstructure.

Cold bending:

Of bare and finned tubes, single or multiple coil bends.

  • Bending range: 3 / 4 '' (25 mm.) to 3 '' (88.9 mm.).
  • Bending radius: max. 16 '' (406.4 mm.), min. 1 x D.

Protective Coating:

Where external corrosion of finned tube is expected, suitable protective coatings can be applied.

 

Uses of welded finned tubes

The main uses for high frequency welded finned tubes are in the heat recovery associated with boilers for power generation and in furnace applications for the petrochemical industry.

Sizes and materials

Our high frequency welding finning machines are capable of handling tube diameters from 33 mm o/d to 273 mm o/d and tube lengths of up to 26 meters. Fin sizes range from 6 mm to 38 mm high and from 0.8 mm to 3 mm thick.

 Dimensional Data Sheet

Any combination of the following materials may be used for fin and tube: carbon, alloy, stainless steels and high nickel alloys.

 

© L. P. S. p. A. All rights reserved

Via Campo dei Fiori, 28 21040 Venegono Superiore

Telephone: +39-0331-827911 | Fax: +39-0331-827722

E-mail: lp@lpspa.it

 

Company registered in VARESE  P.IVA/VAT Nr. 00531940120

Company's capital 560.920,64 €