A Swivel Flange (also called a swivel ring flange) combines a weld-on hub with a free-rotating outer ring.
This smart design lets installers rotate the bolt circle into position after the pipe is welded, making bolt alignment simple even in tight or subsea spaces.
Across Riyadh, Dammam, Jeddah, Jubail, and Al-Khobar, engineers choose the Swivel Flange in Saudi to speed up fit-up, reduce rework, and improve sealing reliability on pipelines and process skids.
A Swivel Flange consists of two parts:
Hub/Neck – Welded to the pipe or spool.
Swivel Ring – A separate rotating ring that carries the bolt holes and bears against the gasket face.
After welding the hub, the ring spins 360° to line up with the mating flange.
This eliminates bolt-hole clocking issues and eases assembly where lifting, visibility, or access is limited.
Swivel flanges are commonly supplied with Raised Face (RF) or Ring Type Joint (RTJ) gasket faces for robust sealing at pressure.
Rapid Alignment: Rotate the ring to match bolt holes without cutting or re-welding spools.
Lower Installation Cost: Less crane time and fewer alignment tools at site.
Safer Fit-Up: Reduced risk when working at height, offshore, or in confined spaces.
Repeatable Seal: RF or RTJ faces support stable, high-integrity joints.
Misalignment Tolerance: Helps compensate for clocking and small angular deviations.
Material Flexibility: Carbon, stainless, duplex/super duplex, and nickel alloys available.
Field-Proven: Widely used in oil & gas, desalination, power, and marine projects.
Offshore Tie-Ins & Subsea Spools – Aligns quickly during hook-up with limited access.
Pipeline Manifolds & Headers – Simplifies bolt-up in crowded racks.
Refinery & Petrochemical Units – Speeds brownfield tie-ins and shutdown work.
Desalination & Power Plants – Reliable sealing on high-diameter cooling water lines.
Skid Packages (Pumps, Compressors, Filters) – Eases alignment on modular equipment.
Marine Terminals – Durable connections exposed to vibration and corrosion.
ASME B16.5 – Pipe Flanges and Flanged Fittings
ASME B16.47 – Large Diameter Steel Flanges (Series A/B)
ASME B16.25 – Buttwelding Ends
ASME B31.3 – Process Piping (fabrication & examination)
ISO 7005 – Metallic Flanges
NACE MR0175 / ISO 15156 – H₂S (Sour) Service Materials
1) Where do swivel flanges add most value?
In offshore, subsea, and brownfield work where alignment is hard and time-critical.
2) Are they suitable for high pressure?
Yes. With RTJ faces and the correct class (e.g., 600–2500), they perform reliably.
3) Can I order duplex or CRA-clad versions?
Absolutely. Duplex/Super Duplex and Inconel-clad hubs are common for corrosive service.
4) Do swivel rings lock after alignment?
The ring is captured; the bolt preload and gasket load secure the joint during service.
5) What gaskets are used?
Spiral-wound or kammprofile for RF; metal ring gaskets (R/RX/BX) for RTJ.
6) Do you supply documentation packs?
Yes—MTC 3.1/3.2, NDE reports, coating certificates, and dimensional checks.
7) Where can I buy Swivel Flanges in Saudi Arabia?
From Nassguard, serving Riyadh, Dammam, Jeddah, Jubail, and Al-Khobar.
The Swivel Flange delivers fast alignment, safer assembly, and repeatable sealing in demanding projects.
Its rotating ring cuts installation time and reduces risk, making it a top choice for oil & gas, power, and marine applications.
For code-compliant Swivel Flange in Saudi, trust Nassguard—materials, classes, and documents tailored to your spec.
| Specification | Details |
|---|---|
| Product Name | Swivel Flange / Swivel Ring Flange |
| Design | Welded hub + free-rotating ring (360°) |
| Sizes | NPS 1″ to 48″ (larger on request) |
| Pressure Classes | ASME 150, 300, 600, 900, 1500, 2500 |
| Faces | RF (Raised Face), RTJ (R, RX, BX where specified) |
| Materials | A105/A105N (CS), A350 LF2 (LTCS), A182 F304/L, F316/L (SS), F51/F53/F55 (Duplex/Super Duplex), Alloy 625/825 (overlay or solid) |
| Corrosion Options | CRA cladding/overlay, thermal spray, painting per spec |
| Weld Ends | Bevel per ASME B16.25; WPS/PQR to ASME IX |
| Testing | Dimensional, PMI, UT/MT/PT, hydro on request |
| Docs | MTC EN 10204 3.1/3.2, full traceability |
| Supplier | Nassguard – Saudi Arabia |