ASTM A335 P11 Swivel Ring FlangeASTM A182 · ISO 27509 / project specs · Manufacturer, stockist & exporter, India
SA-335 P11 · 1¼Cr-½Mo alloy pipe · SRF
An ASTM A335 P11 swivel ring flange is a flange with a rotating ring that allows bolt holes to be aligned after welding, for use with ASTM A335 P11 pipe. ASTM A335 P11 itself is a pipe or plate specification, so the matching swivel ring flange is made to ASTM A182 F11 — which is what we supply for P11 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 A182
- 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 A335 P11 Swivel Ring Flange?
- What it is
- A flange with a rotating ring that allows bolt holes to be aligned after welding
- Material
- ASTM A182 F11
- Dimensions
- ISO 27509 / project specs
- Grade
- ASTM A335 P11
- Best at
- Steam and hot-oil piping up to about 550 °C
ASTM A335 P11 Swivel Ring Flange Specification
| Product | ASTM A335 P11 Swivel Ring Flange |
|---|---|
| Material standard | ASTM A182 F11 |
| 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
ASTM A335 P11 Swivel Ring Flange Chemical Composition
| Element | Weight % |
|---|---|
| Chromium | 1.00 – 1.50 |
| Molybdenum | 0.44 – 0.65 |
| Carbon | 0.05 – 0.15 |
| Manganese | 0.30 – 0.60 |
| Silicon | 0.50 – 1.00 |
| Phosphorus | 0.025 max |
| Sulphur | 0.025 max |
ASTM A335 P11 Swivel Ring Flange Mechanical Properties
| Minimum values | Value |
|---|---|
| Tensile strength | 415 MPa · 60 ksi |
| Yield strength 0.2% | 205 MPa · 30 ksi |
| Elongation | 30% |
Full chemistry, properties and equivalents are on the ASTM A335 P11 grade page.
Other ASTM A335 P11 flanges
ASTM A335 P11 Swivel Ring Flanges for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiASTM A335 P11 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.
Which standard covers ASTM A335 P11 swivel ring flanges?
The material is ASTM A182 F11; 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 A335 P11 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