SS 347 Anchor FlangeASTM A182 · Project drawing · Manufacturer, stockist & exporter, India
AISI 347 · UNS S34700 · ANC
An SS 347 anchor flange is a forged ring welded into a pipeline to fix it to a structure, made from SS 347 to ASTM A182 F347. 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 SS 347 Anchor Flange?
- What it is
- A forged ring welded into a pipeline to fix it to a structure
- Material
- ASTM A182 F347
- Dimensions
- Project drawing
- Grade
- SS 347 · UNS S34700
- Best at
- Welded high-temperature piping in refineries and power plants
SS 347 Anchor Flange Specification
| Product | SS 347 Anchor Flange |
|---|---|
| Material standard | ASTM A182 F347 |
| 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 | PMI · dimensional · NDT and IGC on request |
| 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.
SS 347 Anchor Flange: Why 347 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 SS 347, 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 | Stainless flanges are chosen where carbon steel would rust or contaminate the process. SS 347 is picked for welded high-temperature piping in refineries and power plants. |
|---|---|
| Typical service | Refinery hydroprocessing — Reactor effluent piping and exchangers. |
| B16.5 material group | 2.5 |
| Bolting | ASTM A193 B8C studs with A194 8C nuts |
| Welding to carbon steel | ER309L (or E309L electrode) is the usual filler when joining it to carbon steel |
| Matching filler | ER347 (AWS A5.9) |
SS 347 Anchor Flange Chemical Composition
| Element | Weight % |
|---|---|
| Chromium | 17.0 – 19.0 |
| Nickel | 9.0 – 13.0 |
| Niobium | 10 × C min, 1.00 max |
| Carbon | 0.08 max |
| Manganese | 2.00 max |
| Silicon | 0.75 max |
| Phosphorus | 0.045 max |
| Sulphur | 0.030 max |
SS 347 Anchor Flange Mechanical Properties
| Annealed plate & sheet | Value |
|---|---|
| Tensile strength | 515 MPa · 75 ksi |
| Yield strength 0.2% | 205 MPa · 30 ksi |
| Elongation | 40% |
| Hardness | 201 HB max |
Full chemistry, properties and equivalents are on the SS 347 grade page.
Other SS 347 flanges
SS 347 Anchor Flanges for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSS 347 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 SS 347 anchor flange have?
It depends on class and temperature. SS 347 forgings are in ASME B16.5 material group 2.5; read your class column in that group's table at the design temperature.
Can SS 347 anchor flanges be welded to carbon steel?
Yes — ER309L (or E309L electrode) is the usual filler when joining it to carbon steel.
Which standard covers SS 347 anchor flanges?
The material is ASTM A182 F347; 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 SS 347 anchor 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.
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