ASTM A335 P11 Anchor FlangeASTM A182 · Project drawing · Manufacturer, stockist & exporter, India
SA-335 P11 · 1¼Cr-½Mo alloy pipe · ANC
An ASTM A335 P11 anchor flange is a forged ring welded into a pipeline to fix it to a structure, for use with ASTM A335 P11 pipe. ASTM A335 P11 itself is a pipe or plate specification, so the matching anchor flange is made to ASTM A182 F11 — which is what we supply for P11 lines. Anchor flanges restrain pipelines against thrust and movement — at pump stations, river crossings and pig traps. They are made to project drawings.
- ASTM A182
- Project drawing
- 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 Anchor Flange?
- What it is
- A forged ring welded into a pipeline to fix it to a structure
- Material
- ASTM A182 F11
- Dimensions
- Project drawing
- Grade
- ASTM A335 P11
- Best at
- Steam and hot-oil piping up to about 550 °C
ASTM A335 P11 Anchor Flange Specification
| Product | ASTM A335 P11 Anchor Flange |
|---|---|
| Material standard | ASTM A182 F11 |
| Dimensional standard | Project drawing |
| 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 an Anchor Flange
Anchor flanges restrain pipelines against thrust and movement — at pump stations, river crossings and pig traps. They are made to project drawings.
- Made to drawing
- Usually weld neck on both sides
- Often large and heavy forgings
More on choosing: Anchor flange guide.
ASTM A335 P11 Anchor Flange: Why P11 for anchor flanges
Anchor flanges restrain pipelines against thrust and movement — at pump stations, river crossings and pig traps. They are made to project drawings. In ASTM A335 P11, 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 A335 P11 is picked for steam and hot-oil piping up to about 550 °C. |
|---|---|
| Typical service | Power plants — Main steam and reheat lines. |
| B16.5 material group | 1.9 — Group 1.9 applies to A182 F11 Class 2. Chrome-moly welds usually need PWHT; the code sets thickness exemptions. |
| Bolting | ASTM A193 B7 studs with A194 2H nuts; B16 with Gr 4 or 7 nuts where the temperature calls for it |
| Welding to carbon steel | Matching carbon or low-alloy filler is used; joints to stainless need ER309L |
| Matching filler | ER80S-B2 / E8018-B2 |
ASTM A335 P11 Anchor 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 Anchor 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 Anchor Flanges for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiASTM A335 P11 Anchor Flange — questions buyers ask
What information is needed to quote an anchor flange?
The project drawing with pipe size, wall, design loads and material, plus the inspection plan.
What pressure rating does a ASTM A335 P11 anchor flange have?
It depends on class and temperature. ASTM A335 P11 forgings are in ASME B16.5 material group 1.9; read your class column in that group's table at the design temperature.
Can ASTM A335 P11 anchor flanges be welded to carbon steel?
Yes — matching carbon or low-alloy filler is used; joints to stainless need ER309L.
Which standard covers ASTM A335 P11 anchor flanges?
The material is ASTM A182 F11; dimensions follow Project drawing. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a ASTM A335 P11 anchor 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