ASME B16.47 Series B Carbon Steel Flange Class 75-900, 26" to 60" Size Range for Industrial Piping Systems
These large diameter pipe flanges are manufactured in strict compliance with ASME B16.47 standards, covering pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing requirements. Available in sizes NPS 26" to 60" with pressure classes 75, 150, 300, 400, 600, and 900.
| Specification | Details |
|---|---|
| Product Name | ASME B16.5 Series B Carbon Steel Flange |
| Size Range | 26" to 60" |
| Pressure Class | Class 75, 150, 300, 400, 600, 900 |
| Materials | ASTM A105, A350, A352, A216, A217, A203, A515, A516, A537 |
| Common Face Type | Welding Neck (WN), Blind (BL) |
| Specification | ANSI B16.47 B |
| Coating Options | Anti-rust Paint, Cold and Hot Dip Galvanized, Zinc Plated, Yellow Transparent, Oil Black Paint |
ASME B16.47 Series B specifies flange dimensions for compact flanges that typically feature smaller bolt circle diameters than Series A flanges. These dimensions align with API standard 605 requirements.
| Group No. | Forgings | Castings | Plates |
|---|---|---|---|
| 1.1 | A105, A350 Gr.LF2, A350 Gr.LF6 Cl.1, A350 Gr.LF3 | A216 Gr.WCB | A515 Gr.70, A516 Gr.70, A537 Cl.1 |
| 1.2 | A350 Gr.LF6 Cl2 | A216 Gr.WCC, A352 Gr.LCC, A352 Gr.LC2, A352 Gr.LC3 | A203 Gr.B, A203 Gr.E |
| 1.3 | A352 Gr.LCB, A217 Gr.WC1, A352 Gr.LC1 | A515 Gr.65, A516 Gr.65, A203 Gr.A, A203 Gr.D |
| Steel Class | C max | Si | Mn | P max | S max | Ni max | Cr max | Mo max |
|---|---|---|---|---|---|---|---|---|
| A105 | 0.35 | 0.10-0.35 | 0.60-1.05 | 0.035 | 0.040 | 0.40 | 0.30 | 0.12 |
| Steel Class | Tensile Strength min | Yield Strength min | Elongation in 2in min | Reduction of area min |
|---|---|---|---|---|
| A105 | 485 MPa | 250 MPa | 22% | 30% |
Forged flanges are manufactured as one piece using either die forging or open-die forging processes. This compressive plastic hot working operation consolidates the material to flow in directions most favorable for resisting service stresses.
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