Spiral finned tube (also known as finned tube, finned tube welding equipment performance and parameters of fin tube main performance indicators are shown in the table, the products comply with HG/T3181 the high-frequency resistance welding of spiral fin tube "and JB/T6512" boiler with high frequency resistance welding of spiral fin tube manufacturing technical conditions "requirement.

The performance parameters of the welding equipment of the spiral finned tube

Welding power source (W) 300

Maximum spindle speed (RPM) 300

The welding pipe diameter (mm) ~ Phi Phi 25 168

Thickness of welded steel pipe (mm) 2 to 10

Length of welded steel pipe (m) 0.5 to 25

The width of the welded fin (mm) 13 to 30

Thickness of the welded fin (mm) 0.8 to 2.5

Fin pitch (mm) 4 to 90

Open tooth pitch (mm) 4.5 ~ 8

Weld line speed (m/min) 35

Spiral to the left and right.

Welding material carbon steel, low carbon steel, stainless steel

Main performance index of fin tube

The fin height deviation less than 0.75mm

The fin pitch deviation in any 10 pitch and the average of less than 0.2mm

Straightness per meter of finned tube length is less than or equal to 1mm, less than 10mm

Fin and tube surface verticality (fin tilt angle alpha = 8 DEG)

(measured at the actual weld length of sum and the measurement theory of weld length) La is more than or equal to 0.95Lt fin and pipe surface longitudinal welding rate

Fin and tube surface transverse welding rate (compared with the sum of the average width of strip thickness measurement at the actual weld) Sa = 0.85Sf

The welding specimen tensile strength more than 200MPa

Spiral finned tube