ERW 325 Tube Mill Machine

ERW 325 Tube Pipe Mill Machine-7
ERW 325 Tube Pipe Mill Machine-9
ERW 325 Tube Pipe Mill Machine-5

ERW 325 Tube Mill Description

ERW 325 high frequency longitudinal welded pipe production line tube mill is designed to produce welded pipes of 140mm-325mm in OD and 4.0mm-10.0mm in wall thickness, as well as corresponding square and rectangular pipe.


Double Cone Decoiler is used to support the coil and provide raw materials for the production line. The reel is cantilever type, pneumatic expansion and contraction; in order to maintain the tension of the strip and prevent loose coiling, the reel adopts pneumatic brake.

Shearing Welding Machine2

Shearing and Automatic Welding Machine is connect the strips after cutting the preceding coil tail end and the succeeding coil top end and being welded together by CO2 gas shielding welding to keep the Pipe Welding Line running continuously. Type: Automatic welding by TIG welder

Tube Mill Accumulator

The vertical accumulator is used to store steel strips to ensure continuous operation of the host when welding two coils. Occupy small space.

The horizontal accumulator is used to store steel strips to ensure continuous operation of the host when welding two coils.
Advantage: The feeding is more stable, without bending, while reducing the resistance of the feeding, it will not cause damage to the galvanized layer surface, and the noise is relatively lower.

Forming and Sizing Unit

The steel strip of a certain width is bent into corresponding specifications of round pipe, rectangular pipe or open profile through roll forming. This unit consists of five parts: forming machine, welding machine, cooling part, sizing machine, and straightening machine.

High frequency welding equipment

High frequency welding equipment designed for both single and dual coil induction application and HF contact welding processes, these welders offer optimal flexibility for your production. Power range: from 150 to 500kW, Low industrial water consumption

Cold Flying Saw

Commonly known as chopping saw, computer flying saw, also called friction saw. High-speed cutting is accompanied by high temperature and sparks, and the cutting end surface is purple.

ERW 325 Tube Mill Advantages

Electric control and automatic adjustment, high precision,high roller change speed
With direct square forming technology, one set of roller can produce all pipe sizes
ZTF forming process save roller up to 60%

Technical Parameter

Round Pipe140mm-325mm4.0mm-10.0mm
Square & Rectangle Tube90mm*90mm-250mm*250mm4.0mm-10.0mm
Length6m-12m Length Tolerance: ±3mm
Production Speed40 m/min
Production Capacity55,000 ton/year
Carbon Steel CoilQ235B(ASTM GR·D,σs 230)
Coil ID610-700mm
Coil ODMax 2000mm
Coil Weight15.0T
Mill Installed Capacity430Kw
Line Area130m(Length)*11m(Width)
Worker6-8 Workers

Component Brands

NO.Parts NameBrand
1Main Drive MotorJiangsu King
2Main ReducerJiangsu Guomao
3Motor Driver (DC-digital converter)PARKER
4Bearing SeatHRB, LYC, ZWZ
5Pneumatic ComponentsAIR TAC

Production Process

Scrolling up → Uncoiling → Shear and Welding → Spiral accumulator→ Forming → H.F. induction welding → External burr removing → Cooling → Sizing → Flying saw → Run out table →Inspecting→ Packing→ Warehouse

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