Tube Mill Machine

Professional ZY-89 tube mill for manufacturing carbon steel pipes with 33.4-101.6mm outer diameter and 1.2-4.5mm wall thickness. Features 90m/min production speed, handles galvanized steel strips, and includes customizable specifications. Exported to 70+ countries with proven manufacturing technology and operational expertise.

Professional ZY-16 tube mill for manufacturing automotive, furniture, and construction pipes. Handles 7.6-16mm diameter tubes with 0.25-1.0mm wall thickness at 120m/min production speed. Features experienced technology integration, global market presence in 70+ countries, and comprehensive model range for various industrial applications.

ZY80 direct forming HF welded tube mill produces square and rectangular tubes 40x40 to 80x80mm, wall thickness 1.6-4.0mm. Rigid structure, full automatic operation, easy adjustment, and good weld quality. Custom options and technical assistance available.

High frequency welded pipe mill for producing steel tubes and profiles. Features durable rollers, high-speed welding, and custom configurations. Suitable for construction, auto, and precision tubes. Exported to 70+ countries with proven reliability.

High-speed tube mill for stainless/carbon steel pipes, producing round, square, and rectangle tubes. Features Siemens motor, argon welding, and abrasive cutting. Max yield 350 MPa, wall thickness 1.8-6.0mm. Ideal for decoration, furniture, and construction.

High-frequency welded pipe mill producing round, square, and rectangular tubes from 88.9mm to 219mm OD with wall thickness 2.0-8.0mm. Features line speed up to 50m/min, custom options, and proven export to 70+ countries.

Produces EN standard steel tubes from low alloy steel strips. Features 90m/min line speed, 1.2-3.75mm wall thickness, and HF welding. Customizable for construction, auto, and precision tubes. Proven export to 70+ countries.

Integration Risk in New Tube Mill Projects Buying a tube mill is only half the job — the line must be laid out, installed and commissioned to actually produce. Buyers who receive only a machine are left to solve foundation, layout and startup problems themselves, delaying production and burning budget. Why Machine-Only Deliveries Delay Startup Without layout and foundation drawings, the buyer cannot prepare the site before the machine arrives. Without on-site commissioning,

Cut-Length Drift and Saw Stoppage Buyers order fixed lengths and reject short or long pieces, so the flying saw must cut accurately while the line runs. Saw systems that lose sync with line speed produce off-length tube, and slow reset after each cut caps throughput. Why Fixed-Length Cutting Drifts A saw that does not track line speed cuts while the tube keeps moving, so length varies with speed changes. Slow reset between cuts also forces the line to pause, and mechanical

Final Size and Roundness Control After Welding The weld does not finish the tube — the sizing section does. Without enough sizing stands and a final straightener, welded tube leaves the line oval, bowed or off-diameter, and fails the dimensional checks that precision and structural buyers require. Why Tubes Leave the Mill Out of Round A welded body carries residual heat and stress that pull it out of round unless it is progressively resized. Too few sizing stands or no final

Weld Bead and Heat Distortion After Welding The outside weld bead and residual heat are the two biggest threats to tube quality right after welding. A rough bead marks downstream rolls and ruins surface finish, while heat that is not removed fast enough warps the body and spoils roundness. Why Bead and Heat Damage the Tube Without deburring, the raised outside bead scores the sizing rolls and transfers marks to every tube. Slow or uneven cooling lets residual heat distort the

Seam Drift and Incomplete Fusion in Welded Tube A weld that drifts off-center or fails to fuse completely is the fastest route to scrap and field failures. For small-diameter φ10-26mm tube, keeping the seam exactly on the squeeze-roll center is what separates a strong, round tube from a weak, oval one. Why the Weld Seam Drifts Off-Center Without a positive guide, the strip edges wander as they approach the weld point, so the squeeze rolls meet the seam off-center and fusion

Costly Downtime During Roll Changeovers Every size change stops production, and on fixed-shaft mills operators must dismantle adjacent stands to reach a roll set. For mills running many φ10-26mm sizes in short batches, changeover time is the single biggest drain on output. Why Conventional Roll Change Is Slow Fixed-shaft designs require removing neighboring rolls to access the target set, and re-aligning the pass after every change is manual and error-prone. The longer the

Premature Roll Wear and Dimensional Drift Roll and shaft wear is the hidden cost of tube production: as shafts wear, the pass opens up and OD, roundness and weld quality drift until the mill must stop for re-roll. Mills with soft shaft material face frequent, expensive re-tooling and inconsistent output. Why Roll Shafts Wear Out Quickly Ordinary shaft steel deforms and wears under continuous rolling pressure and heat, especially on the high-load forming and sizing stands.

Common Defects in Small-Diameter Thin-Wall Tube Welding Tube makers running φ10–26mm precision lines report four recurring problems: edge wave and buckling on 0.4–1.5mm strip, drifting weld seams that leave incomplete fusion, ovality caused by uneven cooling, and cut-length drift on the flying saw. Each defect raises scrap and blocks precision, furniture and structural tube orders that demand tight tolerance and clean zinc coating. Why Thin-Wall Small-Diameter Tube Fails

Problem A strip jam or hard spot sends a shock load through the forming stands, and without protection the rollers, shafts and bearings absorb it, causing expensive damage and long downtime. Cause Unexpected overloads such as strip overlaps, hard inclusions or mis-fed strip exceed the design load, and rigid stands pass that shock straight into the tooling and gearbox. Solution The ZY16 forming stands include overload protection that releases at a set force, so a jam trips the

Problem Single-radius rollers force the strip edge through one sharp bend, creating edge strain, marking and uneven deformation that shows up as weld and roundness defects. Cause A single radius concentrates the bend in one place, so the strip edge is overworked at the entry of each pass and the material flows unevenly around the tube. Solution The ZY16 double-radius roller profile transitions the strip edge through two gentler curves, distributing bending more evenly and

Problem Strip that enters forming with coil set, crown or edge wave produces uneven tube, off-center weld seams and roundness defects that cannot be corrected later in the line. Cause Coiled strip retains a curvature memory, and any edge wave or crown creates uneven tension across the strip width, which the forming stands then amplify into pipe defects. Solution The ZY16 seven-roller leveler works the strip back and forth to relieve coil set and flatten crown and edge wave

Problem A poorly supported coil wobbles, feeds strip with edge damage and inconsistent tension, and forces the line to stop too often for coil changes, cutting output and producing edge-related weld defects. Cause Single-mandrel uncoilers hold the coil only partially, so strip pay-off tension fluctuates and the strip edge can be scored or deformed before it ever reaches the forming section, seeding downstream defects. Solution The ZY16 double-mandrel pneumatic uncoiler

Problem Cold rolled strip is smooth and precise, but any scratch, edge damage or over-forming during tube making immediately shows on the finished pipe and destroys the surface quality the customer paid for. Cause CR strip has a thin gauge tolerance but also a soft, easily marked surface; excessive roll pressure or misaligned passes create scratches and ripples, while dirty or worn rollers transfer marks onto the bright surface. Solution The ZY16 uses double-radius rollers