Product Parameters
| Item | Specification |
|---|---|
| Material | Carbon Steel (1020, 1045), Alloy Steel (4130, 4140) |
| Manufacturing | Ring Rolling, Open-Die Forging |
| Size Range | 50 mm – 500 mm OD |
| Application | Flanges, bearing races, ring gears, structural rings |
| Heat Treatment | Annealed, Normalized |
| MOQ | 5 pcs |
description
Forged ring flanges are ring-shaped forgings where the grain flow follows the ring circumference - producing stronger rings than those cut from plate or bar stock. The ring rolling process starts with a pierced cylindrical billet that is rolled into a ring with controlled wall thickness and diameter. The grain flow in a rolled ring is circumferential, matching the stress distribution in most ring applications. Ring rolled flanges have consistent wall thickness, good surface finish, and mechanical properties that exceed plate or bar stock for ring-shaped applications.
Rolled Ring vs. Cut-From-Plate
Cutting a ring from plate means the grain runs parallel to the plate surface, not around the circumference. Under hoop stress - the stress that tries to split a ring like a barrel hoop - this orientation is weak. Rolled ring forging orients the grain around the circumference, matching the stress direction. For pressure vessels, large bearings, and structural rings, the rolled ring forging is worth the extra cost.
FAQ
Q1: MOQ?
A1: 5 pieces for ring forgings.
Q2: Size range?
A2: 50 mm to 500 mm outside diameter.
Q3: Manufacturing method?
A3: Ring rolling produces consistent wall thickness and good grain flow in circumferential direction.
Q4: Materials?
A4: 1020, 1045 carbon steel. 4130, 4140 alloy steel.
Q5: Heat treatment?
A5: Annealed or normalized supply. Final heat treatment after machining.
Q6: Applications beyond pipe flanges?
A6: Yes. Bearing races, ring gears, structural rings, machinery components.
Quality is non-negotiable in precision manufacturing. Every component undergoes rigorous inspection at each stage of production.
- ISO 9001:2015 - Quality management system covering design and manufacturing
- API 6D / API 600 - Design and testing compliance for valve components and flanges
- Hydrostatic Pressure Testing - Every valve body pressure-tested to 1.5× rated pressure
- MPI / LPI - Magnetic particle and liquid penetrant inspection for weld integrity
- CE / ATEX - Pressure equipment directive compliance for EU market available
- Passivation / Electropolishing - ASTM A967 procedures for corrosion resistance
- Material Traceability - Heat number tracking from raw material to finished part
From raw material to finished product, every step is controlled and documented:
- Billet Heating - Precision heating to forging temperature with temperature monitoring
- Forging - Closed-die, open-die, or ring rolling to near-net shape
- Trimming / Piercing - Flash removal and bore operations
- Heat Treatment - Through-hardening, case-hardening, or age-hardening as required
- Finishing Machining - CNC machining, grinding, or super-finishing to final dimensions
- Surface Treatment - Anodizing, plating, or shot peening as specified
- Inspection & Testing - Dimensional check, hardness testing, surface inspection
- Cleaning & Packaging - Degreasing, rust prevention, and protective packaging
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