Swivel Flanges

Field misalignment during flange connections delays commissioning, increases rework, and drives up installation costs. Our Swivel Flanges solve these issues with 360° ring rotation and tight bolt circle tolerances for fast, genaue alignment.

Standard Specification

API 6A (Type 6R), ASME B16.5 (Modified), ISO 10423

Pressure Rating

Class 150 to 2500 (PN10 to PN420) [Lower than fixed flanges]

Material

Carbon Steel (A105), Stainless Steel (A182 F316), Duplex (A995 4A)

Nominal Size

2″ to 24″ (DN50 to DN600) [Max 16″ for full pressure rating]

Flange Type

Rotating Ring + Hub Assembly [360° continuous rotation]

Product Description

They pflegen structural integrity under pressure while simplifying assembly in offshore, subsea, and modular systems. Each unit combines a forged hub with a machined rotating ring, tested for field durability and long-cycle performance.

Facing Type

Raised Face (RF) or Ring-Type Joint (RTJ) [Both sides identical]

Dimensions

Overall thickness = 1.25×standard flange

Bolt Circle Diameter

Matches standard flange [±0.5mm tolerance for rotation]

Number & Size of Bolt Holes

Matches standard flange [Counterbored for rotation clearance]

Surface Finish

63-125 μin RA (sealing faces), 250-500 μin RA (bearing surfaces)

Corrosion Resistance

Hard-faced bearing surfaces (Stellite 6 overlay)

Temperature Rating

-29°C to +121°C [Limited by seal materials]

Material Certification

API Q1, NACE MR0175, PED 2014/68/EU Annex I

Gasket Compatibility

API 6A RX/BX gaskets or Spiral Wound [With anti-rotation feature]

Coating/Plating

None on bearing surfaces [External Xylan coating optional]

Manufacturing Method

Forged hub + Machined ring [Precision-ground bearing surfaces]

Technical Advantages

Conventional flanges force precise pre-alignment, increasing rework and delaying bolt tightening. Our Swivel Flanges fix this using counterbored bolt holes and ±0.5mm tolerance on rotation, preserving ASME B16.5 compatibility.
Hard-faced bearing zones with Stellite 6 overlay avoid galling during field rotation, even after repeated thermal cycles. Forged hub construction resists deformation under pipeline loading, while the 1.25× thickness profile handles sustained pressure and vibration without cracking.

Let's Get Started

Need reliable Flanges for your next project? Get in touch with us today, and we’ll help you find exactly what you need!

Industry Applications

Offshore Piping Systems

Simplifies bolt alignment during rig installations, reducing diver time and flange stress in ROV-assisted assembly.

Subsea Manifolds

Swivel design compensates for restricted-access conditions and avoids field cutbacks or spool misfits.

Floating Production Units (FPSO)

Absorbs pipeline movement during turret rotation, maintaining leak-tight integrity under load cycling.

Modular Skid Packages

Allows fast on-site assembly without needing rework on spool orientation or bolt circle matching.

Refinery Expansion Projects

Accelerates brownfield tie-ins with minimal hot work and no need for pipe cutting or additional fittings.

High-Pressure Injection Lines

Supports Class 1500 systems with rotating face alignment, preventing bolt shear during thermal expansion.

Efficient Piping Alignment with Built-In Flexibility

Smart sourcing requires fit-for-purpose solutions that cut installation hours without sacrificing safety. Our Swivel Flanges provide field-proven alignment capability across demanding applications without specialty tools or seal changes.
We support full traceability with API Q1 and NACE MR0175-certified materials for all pressure classes. Our engineering team works directly with you to validate facing, sealing, and dimensional specs.

Having Doubts? Our FAQ

Check all our Frequently Asked Question

Does the rotating ring maintain sealing integrity under pressure cycling?

Yes, the rotating ring uses a fixed hub-to-ring interface with hard-faced bearing surfaces that prevent galling during rotation. It retains consistent gasket compression even under pressure fluctuations. Testing shows no seal loss after 500+ thermal cycles between -29°C and +121°C.

Can Swivel Flanges be directly swapped with fixed flanges without layout changes?

Yes, they match the same bolt circle diameter and bolt pattern as standard flanges within ±0.5mm tolerance. Only the overall thickness increases slightly by 25%. This allows direct substitution in most existing piping systems.

What is the maximum size available with full pressure rating?

Full pressure rating up to Class 2500 applies up to 16 inches nominal size. Sizes beyond 16 inches follow a de-rated pressure curve. We provide pressure-derating charts and thickness data for all sizes on request.

Are both RF and RTJ options available on the same flange design?

Yes, both facing types are offered with identical profiles on each side. This helps in multi-orientation assembly or when interfacing two different piping ends. It also reduces need for inventorying separate parts.

How is rotational clearance ensured during bolt tightening?

Each bolt hole is counterbored to avoid ring binding during torque. The rotation clearance is validated using plug gauge inspection after machining. This guarantees smooth adjustment during field alignment.

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LOCATIONS

Sitz

10-A, First Floor, V. V Komplex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, Indien.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti Coimbatore-641035, Tamil Nadu, Indien. ㅤ

Swivel Flanges

Standard Specification

Pressure Rating

Material

Nominal Size

Flange Type

Product Description

Facing Type

Dimensions

Bolt Circle Diameter

Number & Size of Bolt Holes

Surface Finish

Corrosion Resistance

Temperature Rating

Material Certification

Gasket Compatibility

Coating/Plating

Manufacturing Method

Technical Advantages

Let's Get Started

Industry Applications

Efficient Piping Alignment with Built-In Flexibility

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Having Doubts? Our FAQ

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Wir freuen uns auf Herstellung für Sie!

LOCATIONS

Sitz

Operations Office

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Swivel Flanges

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Swivel Flanges

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