Our rotary flange (swivel flange) is a high-performance pipeline connection solution designed to simplify bolt hole alignment in high-pressure industrial piping systems. Unlike conventional fixed flanges, rotary flanges allow controlled angular rotation before final tightening, enabling faster installation and improved assembly efficiency during pipeline construction.
These industrial rotary flanges are widely used in oil & gas transmission pipelines, LNG terminals, petrochemical plants, offshore platforms, and EPC pipeline installation projects, where reliable alignment and sealing performance are critical. The rotating design helps engineers overcome common installation challenges such as heavy flange weight, limited working space, and complex piping layouts.
Manufactured through open-die forging or ring rolling combined with CNC precision machining, our swivel flanges provide excellent mechanical strength, corrosion resistance, and long-term reliability in demanding industrial environments. Available in a wide range of sizes, pressure ratings, and materials, they fully comply with international standards including ASME B16.5 and ASME B16.47.
As an experienced rotary flange supplier for Middle East oilfield and offshore pipeline projects, we offer flexible production capability, strict quality control, and full material traceability to meet global EPC contractor requirements.
Pipeline installation in oilfield and offshore environments often faces bolt hole misalignment, especially in large diameter or heavy pipeline systems. Limited installation space and complex routing can significantly increase assembly difficulty and labor cost.
Our swivel flange alignment solution allows engineers to rotate the flange orientation before tightening, reducing crane time, minimizing manpower requirements, and improving overall pipeline construction efficiency.
| Feature | Rotary Flange | Welding Neck Flange |
|---|---|---|
| Alignment | Free rotation | Fixed |
| Installation Time | Faster | Longer |
| Labor Cost | Lower | Higher |
| Offshore Suitability | Excellent | Moderate |
| EPC Installation Efficiency | High | Medium |
Free rotating design enables fast bolt hole alignment in pipeline installation
Reduces installation difficulty in large diameter and high-pressure piping systems
Improves on-site assembly efficiency for EPC contractors and offshore projects
Suitable for medium and high-pressure industrial pipeline applications
Excellent corrosion resistance for LNG, marine and petrochemical environments
Precision forged and CNC machined swivel flange ensures tight sealing performance
Helps reduce overall installation time and pipeline construction labor cost
Size Range: DN15 (1/2") – DN3600 (144")
Pressure Rating: PN2.5 – PN160 / ASME Class 150 – Class 2500
Facing Type: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
Manufacturing Method: Open Die Forging / Ring Rolling + CNC Precision Machining
Manufactured according to major global flange standards:
ASME B16.5 / ASME B16.47 / MSS SP-44
EN 1092-1 / DIN flange standards
BS 4504 / BS10
AWWA C207
GB/T 9124 / SH/T 3406 / HG/T 20592
Fully compatible with global EPC pipeline construction and offshore engineering projects.
Stainless Steel: ASTM A182 F304 / F304L / F316 / F316L
Duplex & Super Duplex: ASTM A182 F51 / F53 / F55
Carbon Steel: ASTM A105 / A350 LF2
Alloy Steel: ASTM A182 F11 / F22 / F5 / F9
Nickel Alloys: Inconel 625 / Incoloy 825 / Monel 400
Titanium & other special materials available
All rotary flanges are supplied with Mill Test Certificates (MTC) and full traceability documentation.
Oil & gas transmission pipeline installation projects
LNG plant construction and module fabrication yards
Offshore platforms and FPSO piping systems
Petrochemical and refinery process pipelines
Pressure vessel nozzle flange alignment solutions
Large diameter water injection and hydraulic pipeline systems
Rotary flanges are ideal where pipeline installation flexibility and precise alignment are required.
Allows flexible flange orientation adjustment before tightening
Minimizes bolt hole mismatch during offshore installation
Improves installation safety in confined work areas
Reduces crane operation time and manpower requirement
Increases overall EPC pipeline construction efficiency
Professional rotary flange manufacturer with export experience in Middle East oilfield projects
Wide production capability up to DN3600 large diameter swivel flanges
High-pressure solutions available up to ASME Class 2500
Multi-standard manufacturing capability for global pipeline projects
Strict quality inspection and full documentation support
OEM production and customized engineering solutions for EPC contractors
Q: What is the main advantage of a rotary flange?
A: Rotary flanges allow angular adjustment before tightening, reducing installation time and improving alignment efficiency in pipeline construction.
Q: Are swivel flanges suitable for offshore pipelines?
A: Yes, they are widely used in offshore oil & gas, LNG and EPC projects due to their flexible installation performance and reliable sealing.
Q: What pressure ratings are available?
A: Rotary flanges are available from ASME Class 150 to Class 2500, suitable for medium to high-pressure industrial piping systems.
