Available in material grades:
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(S)A106 / API 5L Grade B, Grade C
(S)A333 Grade 6, Grade 3
(S)API 5L Grade B, X42, X52, X60, X65, X70 PSL 1
and PSL 2
(S)A335 P1, P11, P22, P5, P9, P91
(S)A312 TP 304L, 304H, 310, 310H, 310S, 316L, 316H, 317L, 321H, 347H, 904L
UNS S31803
254 SMO / UNS S31254, UNS S32750, UNS S32760
 
Alloy C276 / UNS N10276
Alloy 400 / UNS N04400 
Alloy 600 / UNS N06600, Alloy 601 / UNS N06601,
Alloy 625 / UNS N06625, 
Alloy 800 / UNS N08800, Alloy 800H / UNS N08810,
Alloy 800HT / UNS N08811
Alloy 825 / UNS N08825
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Welded Finned Tubes in Type L, KL, LL, G Embedded, Extruded
 
Finned Tubes are helically wound and continuously welded to the tube by high frequency electric resistance welding of solid or serrated steel fins. This produces a homogeneous, clean and continuous 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 supply finned tubes with intermediate plain portions where required.
 
The use of high-frequency current results in extremely localized 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.