Material description: stainless steel 304 and 316, steel pipe (10#, 20#), duplex steel 2205, titanium pipe

Specification	wall thickness(mm)	Pitch(mm)	Fin Height(mm)	Defining high wall thickness(mm)
Ф16	1.2	0.8-1.33	0.8-1	0.8
	2		0.8-1.45	1.6-1.2
Ф19	2.1		1-1.45	1.6-1.2
	2.77			2.3-1.6
Ф25	2			1.5-1.2
	2.77			2.3-2.1
Ф28	2.77			2.5-2.1

List of low finned tube dimensions and heat transfer area

①、Outer Diameter:19mm

Material	Fin Span(mm)	Fin Height(mm)	External Surface Area	Fin Ratio
Stainless Steel	0.75	0.5	0.134	2.23
	1.0	0.8	0.147	2.45
	1.3	1.30	0.164	2.73
Carbon Steel	1.0	1.0	0.168	2.8
	1.3	1.5	0.178	2.97
Light Pipe	–	–	0.06	–

②、Outer Diameter:25mm

Material	Fin Span(mm)	Fin Height(mm)	External Surface Area	Fin Ratio
Stainless Steel	0.75	0.5	0.18	2.25
	1.0	0.8	0.199	2.49
	1.3	1.30	0.223	2.79
Carbon Steel	1.0	1.0	0.227	2.84
	1.3	1.5	0.243	3.04
Light Pipe	–	–	0.08	–

In order to forward you a promt offer we would be pleased to receive you detailed enquiry including:
• Base tube material
• Base tube size (OD x WT x Length)
• Fin material
• Fin type
• Fin diameter or height
• Fin thickness
• Fins per inch, meter or fin pitch
• Lenght of plain, unfinned ends
• Finned Tube Quantity
(Additional fabrication, such as bend or weld the tubes into tubeplate or assembly)