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AVAILABLE USED EQUIPMENT
Used 325 Square Tube Mill Production Line
An available 325-class used square-tube production line from a top-tier Chinese manufacturer. The present tooling package covers square tubes from 150 × 150 mm to 300 × 300 mm.
Included square-tube tooling: 150 × 150–300 × 300 mm | 800 kW HF welder included
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PRODUCT OVERVIEW
Equipment description and reference data
The line is currently available in China and is configured as a large square-tube mill. Unlike the separate ERW355 listing, this package includes the high-frequency welder, electrical control cabinet and operator console.
The technical data below is a strict translation of the equipment information supplied. Final product capability and delivery scope should be reconfirmed during technical inspection.
Process Features
- Main mill section — top-tier Chinese brand
- Matching roll tooling for square tubes from 150 × 150 mm to 300 × 300 mm
- 800 kW high-frequency welder, electrical control cabinet and operator console
- Computer-controlled flying saw
- Run-out roller table and steel-tube bundling rack
Production Process Flow
Entry and levelling → forming → guide and squeeze → HF welding → weld-bead scarfing and polishing → sizing → rough straightening → flying saw → run-out table → bundling
Technical Parameters
- Availability
- Available
- Equipment class
- Used 325 square tube mill
- Reference mill
- 300 × 300 mm square tube mill
- Included tooling range
- 150 × 150–300 × 300 mm square tubes
- Horizontal stand — horizontal shaft
- Ø230 mm; bearing seat Ø170 mm
- Horizontal stand — side shaft
- Ø120 mm; bearing seat Ø120 mm
- Vertical roll
- Ø140 mm; bearing seat Ø95/100 mm
- Squeeze side roll
- Ø170 mm; bearing seat Ø150 mm
- Squeeze upper roll
- Ø80 mm; bearing seat Ø80 mm
- Squeeze support roll
- Ø145 mm; bearing seat Ø120 mm
- Guide upper / lower rolls
- Ø100 / Ø80 mm; bearing seats Ø85 / Ø80 mm
- Rough straightening shaft
- Ø135 mm; bearing seat Ø110 mm
- Main motor
- Z4-315-22, 250 kW, 750 r/min
- Forming drive
- 2 sets, each driving 6 stands
- Sizing drive
- 1 set, driving 4 stands
- Main reducers
- ZSY450-28-I × 2; ZSY450-28-II × 1
- Forming arrangement
- First side: 4 horizontal + 1 vertical; second side: 5 horizontal + 1 vertical; finish forming: 3 horizontal + 3 vertical
- Sizing arrangement
- 4 horizontal + 4 vertical stands
- Rough straightening
- 2 stands
Applications
- Large square structural hollow sections
- Steel structures and factory buildings
- Industrial frames and heavy fabricated structures
Price, dismantling scope, delivery terms and commissioning support are available after the buyer confirms the required products and destination.
APPLICATIONS
What this line can produce
- Large square structural hollow sections
- Steel construction and industrial frames
- Heavy equipment structures
- Large square-tube production
CONFIGURATION FOCUS
Included equipment and key points
- Top-tier Chinese-brand main mill section
- Complete matching tooling for 150 × 150–300 × 300 mm square tubes
- 800 kW high-frequency welder with electrical cabinet and operator console
- Computer-controlled flying saw, run-out table and bundling rack
LINE ARRANGEMENT
A complete production sequence
Entry and levelling → forming → guide and squeeze → HF welding → weld-bead scarfing and polishing → sizing → rough straightening → flying saw → run-out table → bundling
Final capability, condition and delivery scope are subject to technical inspection and the signed supply agreement.TECHNICAL FAQ
Common buyer questions
Why is it called a 325 line when the included tooling ends at 300 × 300 mm?
The equipment is identified as a 325-class mill; the currently included tooling package is specifically confirmed for 150 × 150–300 × 300 mm square tubes.
Is the high-frequency welder included?
Yes. The current scope includes an 800 kW HF welder, electrical control cabinet and operator console.
Are videos available?
Yes. Current-condition equipment videos and additional machine information can be provided to serious buyers.
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Send your target size, wall thickness, steel grade, destination country and preferred delivery scope.
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