Our finned tubes are used wildly approved by LRS, BV, ABS, etc classification societies, and go down well with numerous customer

specification of fin tube
material	specification(mm)	OD of fin	heat exchanging area(M2)	height of fin	thickness of fin(mm)	distance between fin(mm)	longest(m)
carbon steel tube with extruded aluminium fin	Φ 18 X 2.0	Φ38	0.72	10	0.3	3	6
	Φ 21 X 2.0	Φ44	0.96	12	0.3	3	6
	Φ 21 X 2.0	Φ51	1.15	15	0.3	3	6
	Φ 25 X 2.5	Φ50	1.2	12.5	0.3	3	6
	Φ 25 X 2.5	Φ55	1.37	15	0.3	3	6
	Φ 32 X 2.5	Φ62	1.56	15	0.3	3	6
carbon steel tube  with crimped carbon steel fin	Φ 18 X 2.0	Φ38	0.57	10	0.3	4 to 5	6
	Φ 21 X 2.0	Φ51	0.68	15	0.3	5 to 8	6
	Φ 21 X 2.0	Φ45	0.76	12	0.3	5 to 8	6
	Φ 25 X 2.5	Φ50	0.96	15	0.3	5 to 8	6
	Φ 25 X 2.5	Φ55	1	15	0.3	5 to 8	6
	Φ 32 X 2.5	Φ62	1.1	15	0.3	8 to 10	6
	Φ 32 X 2.5	Φ72	1.21	20	0.3	8 to 10	6
stainless steel tube  with crimped stainless steel fin	Φ 18 X 2.0	Φ38	0.62	10	0.3	4	6
	Φ 21 X 2.0	Φ51	0.75	15	0.3	5	6
	Φ 21 X 2.0	Φ45	0.87	12	0.3	5	6
	Φ 25 X 2.5	Φ50	1	12.5	0.3	5	6
	Φ 25 X 2.5	Φ55	1.25	15	0.3	5	6
stainless steel tube with extruded aluminium fin	Φ 18 X 2.0	Φ38	0.72	10	0.3	3	6
	Φ 21 X 2.0	Φ51	0.96	12	0.3	3	6
	Φ 21 X 2.0	Φ45	1.15	15	0.3	3	6
	Φ 25 X 2.5	Φ50	1.2	12.5	0.3	3	6
	Φ 25 X 2.5	Φ55	1.37	15	0.3	3	6
	Φ 32 X 2.5	Φ62	1.56	15	0.3	3	6
copper tube  with crimped copper fin	Φ 16 X 1.0	Φ36	0.56	10	0.3	3.2 to 3.5	6
	Φ 16 X 1.0	Φ36	0.66	10	0.3	2.6 to 2.8	6

finned tube for industry boiler