Bench type vs chuck type vs roller bed: which large pipe CNC plasma cutting machine should you buy?

Bench type vs chuck type vs roller bed - which large pipe CNC plasma cutting machine should I buy?

It depends on pipe diameter and weight. Small-to-medium pipes up to about 300 mm suit a chuck-type machine where chucks grip and rotate the pipe. Large-diameter, heavy pipes - the YOMI YM-LBP class - need a bench/roller-bed design: pipe rests on high-strength support wheels while a floating 3-jaw chuck rotates and centers it, supporting pipes up to 10,000 kg, diameters from 219 mm up to 1620-2000 mm, and lengths of 6-12 m. The floating chuck raises/lowers (W axis, 747 mm lift) so you load big pipes by crane without adjusting roller spacing, and the chuck floats rather than dragging the pipe - keeping large pipes concentric for cleaner cuts. If you cut occasional small tube, a chuck machine is cheaper; if you profile large structural or pipeline pipe daily, the bench/roller-bed with floating chuck is the right architecture.

Which CAD software works with the machine - do I have to program G-code manually?

No manual G-code programming is needed. The YOMI YM-LBP runs an Advantech industrial PC with YOMI PIPE software and includes a parametric curve library covering saddles, T/Y/K/X intersections, oblique and off-center joints, elbows and miter ends. For real project geometry, it imports directly from Tekla Structures, 3D3S, AutoCAD and SolidWorks and generates the G-code automatically, with automatic nesting, kerf compensation and 3D collision simulation. When evaluating suppliers, ask specifically whether the post-processor is open or proprietary - an open one lets you keep your existing design workflow and switch CAM tools later, while a locked ecosystem ties you to one vendor's software.

How does the machine handle out-of-round (ovality) or slightly bent pipes?

The machine is specified for pipes with ovality of 1% or less; within that range the software applies automatic ovality error compensation to the cutting path, and the floating chuck follows minor runout instead of forcing the pipe. Beyond 1% ovality or visibly bent pipe, cut quality and fit-up accuracy degrade - the practical fix is to sort or press-straighten such pipes before loading. For very heavy, long pipes, make sure your loading method (crane + slings or vacuum lifter) doesn't add sag; support the pipe on the roller brackets at proper spacing so the profile being cut stays within the compensation range.

How good is the bevel cut quality for welding, and which standards does it meet?

The YM-LBP cuts bevels with the A/B torch swing axes (radial ±55°, axial ±60°) and plasma bevels up to ±45° (flame up to 60°), with cutting length accuracy of ±1.5 mm and angle error around ±1°. Execution standards are ISO 9013-2002, ISO 8206-1991 and JB/T10045.4. In practice, a CNC-cut beveled saddle goes to the welder ready to fit - no template marking, no grinding to shape - which is where most of the labor saving comes from on T/K/Y branch joints with intersection angles from 15° to 170°. For high-integrity work (pipeline, offshore, petrochemical), keep the plasma consumables fresh and air dry: a worn electrode or wet air shows up immediately as a rough, dross-loaded bevel face that fails visual inspection.

What safety precautions does a large pipe plasma cutting machine require?

Four areas matter. Rotating pipe: never reach over a spinning 500+ kg pipe, and keep chuck/clamp interlocks functional - a slipping heavy pipe can whip a sling or a person. Arc radiation and fume: plasma arcs emit intense UV; use screens and extract cutting fume, with extra filtration required when cutting stainless (hexavalent chromium). Electrical: the plasma source is high-current DC - keep the work clamp on the pipe, cables off walkways, and the machine properly earthed (4 ohms or better). Compressed gas: oxy-fuel torches add fuel gas cylinders and flashback arrestors to the checklist. Train operators on emergency stops and never bypass the Z-axis anti-collision or limit switches - they exist because torch crashes on a 10 m pipe are expensive.

How should I run factory acceptance testing before paying the balance?

Do it on your own pipe drawings, not the supplier's demo parts. A solid acceptance protocol: (1) run a dial-indicator check on chuck concentricity and axial runout with a loaded representative pipe; (2) dry-run a complex multi-branch saddle program to verify multi-axis synchronization and contour smoothness; (3) make a first-article cut of your hardest joint - say a 60° oblique off-center branch with bevel - and check it with a profile gauge against ISO 9013; (4) verify ±1.5 mm length accuracy over a full 12 m cut; (5) pressure-test gas lines and confirm plasma source performance at your thickest wall. Agree the acceptance criteria in the contract, and record consumable hours during the test so you have a baseline for consumable budgeting.

What power, gas and space does the machine need, and how long is delivery and installation?

The YM-LBP bench system needs roughly 12 kW of electrical supply, plasma air at 0.6-0.8 MPa meeting ISO 8573-1 quality (a refrigerated dryer pays for itself in consumable life), and for flame cutting an oxygen/propane manifold. Plan a floor area for the machine plus 12 m pipe infeed and outfeed roller conveyors, crane access for 10-tonne pipes, and fume extraction along the cutting zone. Delivery is typically 30-45 days production plus sea freight in wooden cases (a 20 GP or flat rack depending on configuration), with 2-3 days on-site installation and commissioning including operator training on the YOMI PIPE software. Order the recommended spare-parts kit - electrodes, nozzles, shields and a set of roller bearings - with the machine so consumable supply never blocks production.

Technical Specifications of Bench Type Large Pipe CNC Plasma Cutting Machine

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Applications

The Bench Type Large Pipe CNC Plasma Cutting Machine is widely applied in steel structure prefabricated buildings, bridge and infrastructure construction, shipbuilding and marine engineering, heavy machinery manufacturing, power plant and industrial facilities, and offshore wind power structures.

Learn more about the Bench Type Large Pipe CNC Plasma Cutting Machine:
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For more information about Bench Type Large Pipe CNC Plasma Cutting Machine and other steel structure intelligent equipment, contact YOMI CNC Cutting & Welding Machinery. Our team of experts is ready to help you find the best solution for your manufacturing needs.