A Swivel Ring Flange is a flange assembly designed with a rotating outer ring. The swivel ring can rotate around the hub or inner flange body, allowing bolt holes to be aligned easily with the mating flange during installation.
This design is especially useful when pipe rotation is difficult or impossible, such as subsea pipelines, offshore platforms, marine piping, skid-mounted equipment, and field installation projects.
Compared with a standard fixed flange, a swivel ring flange helps reduce installation time, alignment stress, and bolting difficulty.
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图片建议：放一张横幅图，标题为 MAIN PRODUCTS，展示 Swivel Ring Flange、Weld Neck Flange、Blind Flange、Anchor Flange、Flange Ring 等产品。
图片标题：Main Flange Products
| Standard | Type | Class / Pressure Rating | Size Range | Material Options |
|---|---|---|---|---|
| ASME B16.5 | Swivel Ring Flange / Rotating Flange | Class 150-2500 | NPS 1/2”-24” | ASTM A105, A182, A350 |
| ASME B16.47 | Large Size Swivel Ring Flange | Class 75-900 | NPS 26”-60” | Carbon Steel, Alloy Steel |
| EN 1092-1 | Swivel Ring Flange / Custom Flange | PN6-PN100 | DN15-DN1200 | P250GH, 1.4301, 1.4404 |
| DIN | Rotating Ring Flange | PN6-PN100 | DN15-DN1200 | Carbon Steel, Stainless Steel |
| JIS | Swivel Type Flange | 5K, 10K, 16K, 20K | DN15-DN1000 | SS400, SUS304, SUS316 |
| Custom Drawing | Non-standard Swivel Ring Flange | Customized | Customized | Customized Materials |
| Sealing Surface | RF, FF, RTJ, Custom Face | - | - | - |
| Coating | Black Paint, Anti-rust Oil, Galvanizing, Epoxy | - | - | - |
| Material | Grade |
|---|---|
| Carbon Steel | ASTM A105, Q235, S235JR, ASTM A350 LF2 |
| Alloy Steel | ASTM A182 F1, F5, F9, F11, F12, F22, F91 |
| Stainless Steel | ASTM A182 F304, 304L, F316, 316L, 321 |
| Duplex Steel | F51, F53, F55, S31803, S32205, S32750 |
| Nickel Alloy Steel | Inconel 600, Inconel 625, Incoloy 825, Hastelloy C276 |
| Custom Material | According to customer drawings and project requirements |
Image Position 3: Swivel Ring Flange Dimension Drawing
图片标题：Swivel Ring Flange Dimension Drawing
| Dimension Item | Description |
|---|---|
| OD | Overall outside diameter of the flange |
| ID | Inside bore diameter |
| Thickness | Flange body or ring thickness |
| Swivel Ring Diameter | Diameter of the rotating outer ring |
| Hub Diameter | Diameter of the inner hub section |
| Ring Width | Width of the swivel ring section |
| Bolt Hole | Bolt hole quantity and diameter |
| BCD | Bolt circle diameter |
| Sealing Face | RF, FF, RTJ, or customized sealing surface |
Easy Bolt Alignment
The rotating outer ring allows bolt holes to be adjusted during installation.
Reduced Installation Stress
It helps avoid forced pipe rotation and reduces stress on pipeline joints.
Reliable Sealing Performance
Precision-machined sealing faces help improve leakage resistance.
Suitable for Difficult Installation Sites
Ideal for offshore, subsea, marine, and field pipeline connections.
Customized Manufacturing
OD, ID, thickness, bolt holes, swivel ring diameter, sealing face, and material can be customized.
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图片标题：Swivel Ring Flange Workshop
Offshore Platforms
Used where pipe rotation is limited and bolt alignment is difficult.
Subsea Pipeline Systems
Suitable for underwater pipeline connections requiring flexible bolting alignment.
Oil and Gas Pipelines
Applied in high-pressure transmission and process pipeline systems.
Marine Engineering
Used in shipbuilding, offshore modules, and marine piping systems.
Petrochemical Plants
Suitable for process pipelines, equipment connections, and skid-mounted systems.
Image Position 5: Application Scenarios
图片建议：放海上平台、海底管线、油气管道、船舶管路、化工厂场景图。
图片标题：Swivel Ring Flange Application Scenarios
Q: What is a Swivel Ring Flange?
A: It is a flange with a rotating outer ring that allows bolt holes to be aligned easily during installation.
Q: Where is Swivel Ring Flange commonly used?
A: It is commonly used in offshore, subsea, marine, oil and gas, and industrial pipeline systems.
Q: Can Swivel Ring Flange be customized?
A: Yes. OD, ID, thickness, ring diameter, bolt holes, sealing face, material, and coating can be customized.
Q: What face types are available?
A: RF, FF, RTJ, and customized sealing faces are available.
Ready to improve installation efficiency with premium Swivel Ring Flange solutions? Contact kevin.zhao@hkflange.com for technical specifications and competitive quotations today.
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