A seamless rolled ring starts as a pierced billet that is expanded on a ring mill, so the finished ring has no weld and the grain runs continuously around its circumference. That is the difference between a rolled ring and a ring cut from plate or welded from bar.
We roll rings up to 1,500 mm OD and 240 mm thick on our D51 ring rolling mill. Larger rings, up to 10,000 mm OD and 500 mm thick, are forged by partner forges near our plant in Dingxiang that run presses up to 10,000 t. Heavier-section or awkward proportions are open-die forged instead, and rings can be supplied as-forged, rough-machined or finish-machined. The drawing gives OD, ID, height, wall thickness, machining allowance and tolerance, and the material follows the ASTM or EN standard named on it.
These go into pressure vessels, bearing and gear blanks, rotating equipment, and wind, mining and power assemblies. Ovality and flatness after heat treatment are the real constraints on a large thin ring, so both should be stated rather than left to a general tolerance note. Inspection is UT, hardness, a dimensional report, the heat-treatment record, MTC 3.1 and traceability.
Product family: Custom Forged Components
Custom forged ring RFQs are reviewed by drawing, OD, ID, height, material, machining allowance, tolerance and inspection process.
| Scope and rating | |
|---|---|
| Ring size review | OD, ID, wall thickness and height define feasibility. We roll rings up to 1,500 mm OD and 240 mm thick on our D51 ring rolling mill. Larger rings, up to 10,000 mm OD and 500 mm thick, are forged by partner forges near our plant in Dingxiang that run presses up to 10,000 t. |
| Standards and materials | |
| Standards / drawings |
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| Material grades |
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| Geometry, tolerance and inspection | |
| Shape scope | Rolled rings, open-die rings, rough-machined rings and drawing-based ring blanks. |
| Critical dimensions | OD, ID, height, wall thickness, ovality, flatness, machining allowance and tolerance. |
| Inspection depth | UT, hardness, dimensional report, heat-treatment record, MTC 3.1 and traceability. |
| Reviewed before quotation |
|
| Buying logic | |
| Best-fit RFQ | Best for rolled or open-die forged rings made to drawing rather than stock flange dimensions. |
| Buyer application | Pressure vessels, bearings, rotating equipment, wind, mining, power and heavy industrial assemblies. |
Your standard, drawing revision and project specification govern.
Also known as
We confirm each step against your drawing or standard before we quote.
Material grade, heat number, certificate basis and substitution limits are checked against the Custom Forged Rings drawing or standard before procurement is released.
The forging or ring-rolling route is selected around OD, ID, height, wall thickness, allowance and grain-flow expectations for the finished ring geometry.
Heat treatment is planned against ring section thickness, material grade, hardness or mechanical-test requirements and any low-temperature impact condition.
Rough machining opens OD, ID, end faces or datum bands so ovality, wall allowance and final ring machining risk can be checked early.
Final machining controls OD, ID, height, end-face parallelism, grooves or customer-specified profiles before dimensional inspection is issued.
Inspection covers OD, ID, height, wall thickness, dimensional report, MTC 3.1 and required UT, MT or PT records before shipment release.
Marking, packing and export documents are prepared by PO line item so the Custom Forged Rings shipment can clear customs and be identified at site receiving.
List document requirements in the first RFQ; they affect price and schedule.
When the section is heavy or the proportions are awkward. We roll rings up to 1,500 mm OD and 240 mm thick on our D51 ring rolling mill. Larger rings, up to 10,000 mm OD and 500 mm thick, are forged by partner forges near our plant in Dingxiang that run presses up to 10,000 t. Either route can be supplied as-forged, rough-machined or finish-machined.
A rolled ring starts as a pierced billet expanded on a ring mill, so it has no weld and its grain runs continuously around the circumference - unlike a ring cut from plate or welded from bar.
Ovality and flatness after heat treatment. They are the real constraints on a large thin ring, so state both rather than leaving them to a general tolerance note.
Email quote@bldforgedirect.com with standard, drawing, material, quantity and inspection requirements.