The production speed is adjustable within the suitable pipe diameter and wall thickness. Applicable materials A: internal pipe, hot rolling or cold rolling strip steel B: external pipe, stainless steel strip steel Material: A. internal pipe, soft steel B: External pipe, stainless steel Thickness of metal strip Internal pipe: 0.62.5mm, External pipe: 0.21.0mm Size range of composite pipe processed Outer diameter: Φ13Φ40mm Thickness of wall internal pipe: 0.62.5mm external pipe: 0.21.0mm Length: 49M Process Flow of Steel Pipe Raw material (strip steel roll) →unwinding→cut the both ends of metal strip and butt weld (from the user) → storage silo→non-power flattening→forming rolling→ high frequency welding→remove burr outside weld joint→cooling→weld joint polishing→sizing→blowing -dry→enter into composite unit Process Flow of Composite Pipe Raw material (stainless steel strip steel roll) →unwinding → cut the both ends of metal strip and butt weld (from the user) →Guide Device (the upper is finished steel pipe, the lower is stainless steel metal strip) →composite rolling→argon arc welding→weld joint polishing→sizing →rough straightening→fixed-length cut-off→pipe drop support Rolling speed: 215M/min Power supply (for reference) (a) motor power of equip- Ment: 3KW+2X18.5KW+22KW+5.5KW+5X2.2KW=78.5KW High frequency equipment: 100KW Argon arc welder: 500A Introduction of Main Equipments Unwinding support: 3600 rotation for both sides, manual tension Width of metal strip: 125mm Thickness of metal strip internal pipe: 0.62.5mm, external pipe: 0.21.0mm, outer diameter of strip roll: Φ1200mm Inner diameter of strip roll: Φ350Φ400mm Storage silo of internal welded pipe Structure type: squirrel-cage board welding parts, with auto feeding and discharging mechanism Adjustment mode: screw adjustment by hand Storage capacity: 150300M Internal welded pipe mainframe: Flattening device 1 set Horizontal roller stand 12 sets Vertical roller stand 14 sets Sub-power box 12 boxes Guide roller seat 1 set Squeeze roller seat 1 set Outer weld joint shaper roll frame 2 sets Blowing-dry mechanism 1 set Main drive Main motor: 18.55KW DC motor 2 sets Main speed reducer: ZSY200-31.5 2 sets Outer stainless steel composite pipe mainframe Feeding mechanism 1 set Composite mechanism 1 set Guide roller seat 1 set Squeeze roller seat 1 set Polishing device 3 sets Sizing part of composite pipe Horizontal roller stand 6 sets Vertical roller stand 6 sets Sub-power box 3 boxes (two-assembly) Rough straightening mechanism Structure type: three-horizontal and five-vertical Main drive system Main motor: 22KW DC motor 1 set Main speed reducer: ZSY200-31.5 1 set Computer-controlled saw Structure type: computer tracking, auto cutting Thickness of cutting: δ0.62.5mm Outer diameter of cutting: Φ10Φ40mm Length of cutting: 49m Tolerance of cutting: ≤0.3mm Motor of cutting: 5.5KW Pipe drop support: rail-type pneumatic turn-down device