ASTM A106 Gr B Swivel Ring FlangeASTM A105 · ISO 27509 / project specs · Manufacturer, stockist & exporter, India
SA-106 Gr B · Seamless carbon steel pipe · SRF
An ASTM A106 Gr B swivel ring flange is a flange with a rotating ring that allows bolt holes to be aligned after welding, for use with ASTM A106 Gr B pipe. ASTM A106 Gr B itself is a pipe or plate specification, so the matching swivel ring flange is made to ASTM A105 — which is what we supply for A106 B lines. 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 A105
- 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 an ASTM A106 Gr B Swivel Ring Flange?
- What it is
- A flange with a rotating ring that allows bolt holes to be aligned after welding
- Material
- ASTM A105
- Dimensions
- ISO 27509 / project specs
- Grade
- ASTM A106 Gr B
- Best at
- High-temperature process and steam piping in refineries and power plants
ASTM A106 Gr B Swivel Ring Flange Specification
| Product | ASTM A106 Gr B Swivel Ring Flange |
|---|---|
| Material standard | ASTM A105 |
| 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 | Chemical & mechanical per heat · NDT · impact where specified |
| 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.
ASTM A106 Gr B Swivel Ring Flange: Why A106 B 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 ASTM A106 Gr B, 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 | Carbon and low-alloy flanges carry most utility, hydrocarbon and high-temperature service. ASTM A106 Gr B is picked for high-temperature process and steam piping in refineries and power plants. |
|---|---|
| Typical service | Refineries — Process and steam lines. |
| B16.5 material group | 1.1 |
| Bolting | ASTM A193 B7 studs with A194 2H nuts |
| Welding to carbon steel | Matching carbon or low-alloy filler is used; joints to stainless need ER309L |
| Matching filler | ER70S-6 / E7018 |
ASTM A106 Gr B Swivel Ring Flange Chemical Composition
| Element | Weight % |
|---|---|
| Carbon | 0.30 max |
| Manganese | 0.29 – 1.06 |
| Silicon | 0.10 min |
| Phosphorus | 0.035 max |
| Sulphur | 0.035 max |
| Chromium | 0.40 max |
| Copper | 0.40 max |
| Nickel | 0.40 max |
ASTM A106 Gr B Swivel Ring Flange Mechanical Properties
| Minimum values (elongation varies with wall) | Value |
|---|---|
| Tensile strength | 415 MPa · 60 ksi |
| Yield strength 0.2% | 240 MPa · 35 ksi |
| Elongation | 30% |
Full chemistry, properties and equivalents are on the ASTM A106 Gr B grade page.
Other ASTM A106 Gr B flanges
ASTM A106 Gr B Swivel Ring Flanges for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiASTM A106 Gr B 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 ASTM A106 Gr B swivel ring flange have?
It depends on class and temperature. ASTM A106 Gr B forgings are in ASME B16.5 material group 1.1; read your class column in that group's table at the design temperature.
Can ASTM A106 Gr B swivel ring flanges be welded to carbon steel?
Yes — matching carbon or low-alloy filler is used; joints to stainless need ER309L.
Which standard covers ASTM A106 Gr B swivel ring flanges?
The material is ASTM A105; 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 ASTM A106 Gr B swivel ring flange?
The steel price, the size and pressure class, quantity, and the testing and documents required. Send your list and we quote the same working day.
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