General DescriptionThe proposed Tube Mill is a combination of equipment installed in a line for the production of High Frequency Induction Welded (HFIW) carbon steel tubes. The process involved is cold forming of carbon steel strip in circular shape, longitudinal welding, sizing, converting into specified shape and cutting to pre determined length.
Ф90 high-frequency welded tube mill line is designed to produce round tubes with diameter of Φ38.1~Φ90mm with wall thickness of 1.0~4.5mm and square/rectangular tubes of corresponding size. This line utilizes roll forming to process steel strip into various shapes. Using high frequency induction heating, this line is capable of producing section material of various diameters and sizes by squeezing weld seam together into closed shape. The products conform to BS/ASTM Standard. Adopting the advantages of the equipment of the same kind at home and abroad, each element of the line is designed with new ideas. The application of advanced technology, PLC automatic control system and British Eurasia Digital speed regulating unit ensure that the production line works reliably、operates and maintains easily. Being the best production line in China, it can also compete with the advanced ones in the world.
Advantages of the line: It is easy to operate,adjust and maintain with good welding seam quality and rigid machine structure.
Tube Mill Line Technical Specification
Direction of Operation: (To be confirmed by Buyer)
·Total Power: 900kW
·Compressed Air: 5m2/min Pressure: 0.4~0.7MPa
·Capacity of cooling liquid: 20t/h~30 t/h
·Tube welding speed: 20-60m/min
(Square and Rectangular Hollow Shapes are produced at lower speeds depending on side to wall thickness ratio)
Raw Material Specification
Material: Carbon Steel, Cold or Hot Rolled pre slit strip coils of weld able grade with max. 0.2% carbon.
Material.: σb≤345Mpa σs≤520Mpa
Strip thickness: Min 1.2mm Max 4.5mm
Width of strip: 120~ 280mm
Strip Width Tolerance: ±0.1 mm
O.D of coil: φ1000-φ1800mm
I.D of coil: 508mm,(To be confirmed by Buyer)
Coil weight: 5.0T( Max)
Product Specifications
· Round Tube diameter: Minφ38.1mm Max φ90mm
· Round tube wall thickness:Min1.5mm Max 4.5mm
· Square tube: Min 40x40mm, Max 70x70 mm
· Rectangle Min30x50 mm, max 40x100 mm
· Wall thickness square & rectangle tube: 1.2- 4.5 mm
· Sizing length: 4m~12m
· Cut Length Tolerance: ±3.0 mm
· Tube Thickness/Diameter Ratio:Min 0.02 Max 0.10
· Tube Standard: Apply to relevant international standard ASTM A513, ASTM A500
· Outside Diameter Tolerance: ±0.2% or ±0,15