Choose an ID-mounted beveler when you have an open pipe end and want the fastest, lightest setup; choose a split-frame OD-mounted machine when the pipe is installed, has no free end, or must be cut as well as beveled. Both cut cold and leave a weld-ready bevel; the difference is where they clamp and what they can do.
How ID-mounted bevelers work
An ID-mounted beveler has a mandrel that expands against the inside of the pipe. The motor turns a tool holder around that mandrel and the operator feeds the tool into the pipe end. Because the machine references the bore, the bevel follows the pipe even if it is slightly oval.
- Light: from about 9 kg for small bore models.
- Fast to set up on open ends.
- Can face, bevel, counterbore and inner-bevel.
- Cannot cut a pipe; it only machines the end.
How split-frame machines work
A split-frame (clamshell) machine opens into two halves that close around the outside of the pipe. A rotating ring carries tool slides; one tool can part the pipe while another bevels it. Because it mounts on the outside, it works in the middle of an installed line.
- Cuts and bevels at the same time.
- Works on in-line pipe with no free end.
- Low radial and axial clearance in tight racks.
- Heavier, and each frame covers a narrower range of diameters.
Decision checklist
| Question | If yes |
|---|---|
| Is the pipe already installed with no free end? | Split frame |
| Do you need to cut the pipe as well as bevel it? | Split frame |
| Is this shop prefabrication of spools? | ID-mounted |
| Is the bore very small (under 76 mm)? | ID-mounted or OD self-centring |
| Is it a hazardous area? | Either, with pneumatic or hydraulic drive |
Sizing tips
Check the actual bore, not just nominal pipe size — schedule changes the ID considerably. For split frames, confirm the radial clearance around the pipe and whether the machine must pass between adjacent lines. And tell your supplier the wall thickness: heavy wall may need a heavy-duty tool slide.
Frequently asked questions
Can an ID-mounted beveler cut pipe?
No. ID-mounted machines face and bevel the pipe end. To cut the pipe and bevel it in one step, use a split-frame OD-mounted machine.
Which machine is better for pipeline maintenance?
Split-frame OD-mounted machines, because they clamp around installed pipe and cut cold without sparks.
What information do I need to size a pipe beveler?
Pipe OD and ID (or schedule), wall thickness, material, bevel shape, and available power: electric, pneumatic or hydraulic.
