OEM manufacturer Manufacturer standard / client drawing · ASME B16.5 / B16.47 (mating bolt pattern)
Swivel Ring Flanges — Mating ASME B16.5 / B16.47
A swivel ring flange has a hub that is welded to the pipe and a separate ring that rotates around it, so the bolt holes can be aligned on site. There is no ASME dimensional standard for swivel ring flanges; Teshi Group manufactures them to manufacturer standard or client drawing, drilled to mate ASME B16.5 or B16.47 flanges.
Also called: swivel flange, rotating ring flange, orientation flange, SRF
What is a Swivel Ring Flange?
A swivel ring flange consists of a weld neck hub with a sealing face and a loose, full-strength ring that bears on a shoulder of the hub. Turning the ring lines up bolt holes without rotating the pipe, which is useful for pipeline tie-ins, subsea and riser connections, and spools where rotational alignment is difficult. Unlike a lap joint flange, the hub carries the gasket face and is designed for the full rating of the joint. Ring and hub dimensions are set by the manufacturer's design or the purchaser's drawing.
Key features
- Rotating ring for bolt-hole alignment at installation
- Hub carries the gasket face; RF or RTJ
- Bolt pattern to mate ASME B16.5 or B16.47 flanges
- High-yield grades for pipeline service
- Designed to drawing for the specified rating
Specification
| Supply | OEM manufacturer — Teshi Group, India |
|---|---|
| Standard | No ASME/MSS dimensional standard; manufacturer standard or client drawing; mating dimensions per ASME B16.5 / B16.47 |
| Pressure class | Class 150–2500 equivalent, as designed |
| Facing | RF, RTJ |
| Materials — carbon steel | ASTM A105 / A105N; ASTM A181 Cl 60, Cl 70; ASTM A266 Gr 2, Gr 4 (large forgings) |
| Materials — high-yield carbon steel | ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70 (MSS SP-44 grades F52–F70) |
| Materials — low-temperature carbon steel | ASTM A350 LF1, LF2 Cl 1, LF2 Cl 2, LF3, LF6, LF9 |
| Materials — alloy steel (Cr-Mo) | ASTM A182 F1, F2, F5, F5a, F9, F11 Cl 1 / 2 / 3, F12 Cl 1 / 2, F21, F22 Cl 1 / 3, F22V, F91, F92, F911; ASTM A336 F11, F22 (large forgings) |
| Materials — stainless steel | ASTM A182 F304, F304L, F304H, F304LN, F309H, F310, F316, F316L, F316H, F316LN, F316Ti, F317, F317L, F321, F321H, F347, F347H, F348 |
| Materials — 904L and 6Mo | 904L (ASTM A182 F904L, UNS N08904); 254 SMO / 6Mo (ASTM A182 F44, UNS S31254); AL-6XN (ASTM A182 F62, UNS N08367) |
| Materials — duplex stainless steel | ASTM A182 F51 (UNS S31803), F60 (UNS S32205, 2205) |
| Materials — super duplex stainless steel | ASTM A182 F53 (UNS S32750, 2507), F55 (UNS S32760), F61 (UNS S32550) |
| Materials — nickel alloys | ASTM B564 / B160 / B462: Nickel 200 / 201 (N02200 / N02201), Monel 400 (N04400), Monel K-500 (N05500), Inconel 600 (N06600), Inconel 625 (N06625), Inconel 718 (N07718), Incoloy 800 / 800H / 800HT (N08800 / N08810 / N08811), Incoloy 825 (N08825), Hastelloy C276 (N10276), Hastelloy C22 (N06022), Hastelloy B2 / B3 (N10665 / N10675), Alloy 20 (N08020) |
| Materials — titanium | ASTM B381 Grade F1, F2, F5 (Ti-6Al-4V), F7, F12 |
| Materials — copper-nickel | Cu-Ni 90/10 (UNS C70600) and 70/30 (UNS C71500), ASTM B151 bar; flanges to ASME B16.5 or EEMUA 145 |
| Grade availability | Every grade listed is made or supplied against order, with EN 10204 3.1 certificates (3.2 / third-party inspection when specified) and PMI on alloy, stainless, duplex and nickel grades. |
| Testing | Visual and dimensional inspection, hardness, UT and MPI; Charpy impact when specified |
| Documents | EN 10204 3.1 mill test certificate; 3.2 / third-party inspection when the order specifies; dimensional inspection report; IBR certification when specified |
Applications
- Pipeline tie-ins and spool closures
- Riser and offshore piping connections
- Pump and equipment connections needing rotational alignment
- Large-diameter piping where bolt alignment is difficult
Swivel ring flange vs lap joint flange
Both have a ring that rotates for alignment. In a lap joint, the ring bears on a stub end and the joint has lower fatigue strength; it is used in low-pressure, frequently dismantled services. A swivel ring flange is a designed, full-rated assembly with the gasket face on a forged hub, intended for pipelines and high-pressure tie-ins. Both are ordered with the mating flange standard stated.
Technical data sheets
Dimensions & weights
FAQ
Swivel Ring Flange: common questions
Is there a standard for swivel ring flanges?
There is no ASME or MSS dimensional standard. Swivel ring flanges are made to manufacturer standard or client drawing, with the ring drilled to mate an ASME B16.5 or B16.47 flange of the specified class.
Why use a swivel ring flange?
It lets the bolt holes be aligned after the hub is welded, without rotating the pipe. This simplifies tie-ins, offshore and subsea spools, and any joint where exact pre-alignment is hard.
What do you need to quote?
Give the line size and wall thickness, class or design pressure, facing, mating flange standard, material grade and any impact test requirement. A drawing helps. Teshi Group quotes in 24–48 hours.
Which materials are used for swivel ring flanges?
For pipelines, ASTM A694 F52 to F65 or A350 LF2 to match the line pipe and design temperature. For corrosive service, F316L or F51 duplex hubs can be supplied; the ring may be a different grade if the design allows.
Need a size or grade not listed here?
Our engineering team manufactures against your drawing or datasheet, with dimensional sign-off before dispatch.
Send us your specificationTraceability
From mill heat to your site
- 01
Approved mill material
Received against the mill certificate; heat number registered.
- 02
Forging & machining
Heat number carried through every stage in our Indian works.
- 03
PMI, dimensional & NDT
Every lot inspected to the governing standard; TPI witness on request.
- 04
Stamped & certified dispatch
Hard-stamped pieces with EN 10204 3.1 / 3.2 certificates.
Quick RFQ
Quote for Swivel Ring Flange in 24–48 hours
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