Monel 400 Swivel Ring FlangeASTM B564 · ISO 27509 / project specs · Manufacturer, stockist & exporter, India
Alloy 400 · UNS N04400 · SRF
A Monel 400 swivel ring flange is a flange with a rotating ring that allows bolt holes to be aligned after welding, made from Monel 400 to ASTM B564. Swivel ring flanges speed up subsea and offshore tie-ins and riser connections, where rotating the whole pipe to line up bolt holes is not possible.
- ASTM B564
- ISO 27509 / project specs
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is a Monel 400 Swivel Ring Flange?
- What it is
- A flange with a rotating ring that allows bolt holes to be aligned after welding
- Material
- ASTM B564
- Dimensions
- ISO 27509 / project specs
- Grade
- Monel 400 · UNS N04400
- Best at
- Seawater, hydrofluoric acid and marine service
Monel 400 Swivel Ring Flange Specification
| Product | Monel 400 Swivel Ring Flange |
|---|---|
| Material standard | ASTM B564 |
| Dimensional standard | ISO 27509 / project specs |
| Sizes | ½" – 24" (ASME B16.5) · 26" – 60" (ASME B16.47) |
| Pressure class | Class 150, 300, 400, 600, 900, 1500, 2500 · PN 6 – PN 100 |
| Facing | RF · FF · RTJ · tongue & groove |
| Bore | To match pipe schedule (state on order) |
| Testing | PMI · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
When to Choose a Swivel Ring Flange
Swivel ring flanges speed up subsea and offshore tie-ins and riser connections, where rotating the whole pipe to line up bolt holes is not possible.
- Hub welded to pipe; ring rotates
- Common on subsea and offshore lines
- Made to ISO 27509 / DNV or project specs
More on choosing: Swivel ring flange guide.
Monel 400 Swivel Ring Flange: Why 400 for swivel ring flanges
Swivel ring flanges speed up subsea and offshore tie-ins and riser connections, where rotating the whole pipe to line up bolt holes is not possible. In Monel 400, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Nickel-alloy flanges are used where acids, chlorides or heat defeat stainless. Monel 400 is picked for seawater, hydrofluoric acid and marine service. |
|---|---|
| Typical service | Marine — Pump shafts, valves and seawater piping. |
| B16.5 material group | 3.4 |
| Bolting | B7 (coated), B8M or nickel-alloy studs such as Monel 400 from ASTM B164, as the project specifies |
| Welding to carbon steel | A nickel-base filler such as ERNiCr-3 (or ERNiCrMo-3) is used when joining it to carbon steel |
| Matching filler | ERNiCu-7 (AWS A5.14) |
| Sour service | Listed in NACE MR0175 / ISO 15156-3 within its limits — state it on the order |
Monel 400 Swivel Ring Flange Chemical Composition
| Element | Weight % |
|---|---|
| Nickel (+Co) | 63.0 min |
| Copper | 28.0 – 34.0 |
| Iron | 2.5 max |
| Manganese | 2.0 max |
| Carbon | 0.3 max |
| Silicon | 0.5 max |
| Sulphur | 0.024 max |
Monel 400 Swivel Ring Flange Mechanical Properties
| Annealed plate | Value |
|---|---|
| Tensile strength | 480 MPa · 70 ksi |
| Yield strength 0.2% | 195 MPa · 28 ksi |
| Elongation | 35% |
Full chemistry, properties and equivalents are on the Monel 400 grade page.
Standards on this page
Other Monel 400 flanges
Monel 400 Swivel Ring Flanges for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiMonel 400 Swivel Ring Flange — questions buyers ask
Where are swivel ring flanges used?
Mainly in subsea and offshore pipelines, risers and spools where alignment in place is difficult.
What pressure rating does a Monel 400 swivel ring flange have?
It depends on class and temperature. Monel 400 forgings are in ASME B16.5 material group 3.4; read your class column in that group's table at the design temperature.
Can Monel 400 swivel ring flanges be welded to carbon steel?
Yes — a nickel-base filler such as ERNiCr-3 (or ERNiCrMo-3) is used when joining it to carbon steel.
Which standard covers Monel 400 swivel ring flanges?
The material is ASTM B564; dimensions follow ISO 27509 / project specs. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a Monel 400 swivel ring flange?
The alloy price, the size and pressure class, quantity, and the testing and documents required. Send your list and we quote the same working day.
Can you supply Monel 400 swivel ring flanges to NACE MR0175?
Yes. Monel 400 is listed in NACE MR0175 / ISO 15156-3 within its limits; state NACE compliance on the order and it is confirmed on the certificate.
What documents do you supply?
EN 10204 3.1 mill certificates as standard, 3.2 with third-party inspection on request, plus dimensional and PMI reports.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026