FENGQI MACHINERY
Complete Tube Mill Solutions
ERW tube mills, API pipe lines and precision roll forming systems engineered for your products.
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DIRECT FORMING TO SQUARE TUBE MILL
Direct Forming to Square Tube Mill
Direct forming to square progressively bends flat strip into an open square or rectangular section before high-frequency welding and final sizing, avoiding the conventional round-to-square route.
Reference range: 20×20–500×500 mm, 0.5–12 mm wall
Discuss your production range
APPLICATIONS
What this line can produce
- HSS structural hollow sections
- Machinery frames
- Large steel-structure columns
- Square and rectangular guardrail tube
CONFIGURATION FOCUS
Engineering features
- One roll set can cover a designed section range
- Reduced unnecessary deformation
- Quick roll-change configuration available
- Potential roll-cost and energy savings
TYPICAL PROCESS FLOW
A complete production sequence
Uncoiling → strip joining → accumulation → corner pre-bending → direct square forming → HF welding → sizing → straightening → cutting
Final process flow and equipment scope are confirmed after the product range and quality requirements are reviewed.TECHNICAL FAQ
Common buyer questions
What is direct forming to square?
It forms square or rectangular tube directly from strip instead of first making a round tube and reshaping it.
Can one set of rolls produce every square size?
A designed range can share rolls, but the exact common-roll coverage depends on section dimensions, wall thickness and corner requirements.
Need a line matched to your product?
Send the size range, wall thickness, material grade, speed target, coil data and destination country.
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