Trident Metal Industries — global sourcing, reliable supply and competitive pricing for pipes, tubes, fittings, flanges, sheets, plates and rods.
Trident Metal Industries stocks and supplies Blind, Slip-On, Weld Neck, Threaded, Socket Weld and Lap Joint Flanges in Stainless Steel, Duplex, Super Duplex and High-Nickel Alloys as per ASME B16.5 / B16.47.
Solid disc flanges used to seal off the end of a piping system, valve or pressure vessel opening, allowing future line extension or a testable, removable closure point.
| Size | OD (mm) | Bolt Circle (mm) | No. of Bolts |
|---|---|---|---|
| 1/2" | 89 | 60.5 | 4 |
| 1" | 108 | 79.2 | 4 |
| 2" | 152 | 120.7 | 4 |
| 4" | 229 | 190.5 | 8 |
| 6" | 279 | 241.3 | 8 |
Flanges that slide over the pipe end and are fillet-welded top and bottom, offering easier alignment and lower installation cost for low-to-moderate pressure piping.
| Grade | UNS No. | ASTM Standard |
|---|---|---|
| 304/304L | S30400/S30403 | ASTM A182 |
| 316/316L | S31600/S31603 | ASTM A182 |
| Duplex 2205 | S32205 | ASTM A182 |
| Super Duplex 2507 | S32750 | ASTM A182 |
Long tapered hub flanges butt-welded to the pipe for smooth stress transfer and minimal turbulence, the preferred choice for high-pressure, cyclic-load service.
| Grade | UNS No. | ASTM Standard |
|---|---|---|
| 304/304L | S30400/S30403 | ASTM A182 |
| 316/316L | S31600/S31603 | ASTM A182 |
| Duplex 2205 | S32205 | ASTM A182 |
| Super Duplex 2507 | S32750 | ASTM A182 |
Flanges bored and tapped to mate with pipe threads, allowing installation without welding — well suited to low-pressure service and hot-work restricted locations.
| Grade | UNS No. | ASTM Standard |
|---|---|---|
| 304/304L | S30400/S30403 | ASTM A182 |
| 316/316L | S31600/S31603 | ASTM A182 |
| Duplex 2205 | S32205 | ASTM A182 |
| Super Duplex 2507 | S32750 | ASTM A182 |
Flanges with a recessed socket into which the pipe is inserted and single fillet welded, giving a smooth bore for improved flow in small-bore, high-pressure systems.
| Grade | UNS No. | ASTM Standard |
|---|---|---|
| 304/304L | S30400/S30403 | ASTM A182 |
| 316/316L | S31600/S31603 | ASTM A182 |
| Duplex 2205 | S32205 | ASTM A182 |
| Super Duplex 2507 | S32750 | ASTM A182 |
Used with a stub-end, this free-rotating flange allows precise bolt-hole alignment and permits use of a lower-cost flange material for non-wetted parts.
| Grade | UNS No. | ASTM Standard |
|---|---|---|
| 304/304L | S30400/S30403 | ASTM A182 |
| 316/316L | S31600/S31603 | ASTM A182 |
| Duplex 2205 | S32205 | ASTM A182 |
| Super Duplex 2507 | S32750 | ASTM A182 |
Refer to the 3D drawing and standard dimensions table below before placing your order.
Note: Standard 3D reference diagram for Outer Diameter, Thickness, and Bolt Holes.
| NPS (Size) | Outer Dia (mm) | Thickness (mm) | RF Dia (mm) | PCD (mm) | No. of Bolts |
|---|---|---|---|---|---|
| 1/2" | 89 | 11.2 | 35 | 60.5 | 4 |
| 3/4" | 98 | 12.7 | 43 | 69.9 | 4 |
| 1" | 108 | 14.3 | 51 | 79.2 | 4 |
| 1 1/4" | 117 | 15.9 | 64 | 88.9 | 4 |
| 1 1/2" | 127 | 17.5 | 73 | 98.6 | 4 |
| 2" | 152 | 19.1 | 92 | 120.7 | 4 |
| 2 1/2" | 178 | 22.4 | 105 | 139.7 | 4 |
| 3" | 191 | 23.9 | 127 | 152.4 | 4 |
| 4" | 229 | 23.9 | 157 | 190.5 | 8 |
| 5" | 254 | 23.9 | 186 | 215.9 | 8 |
| 6" | 279 | 25.4 | 216 | 241.3 | 8 |
| 8" | 343 | 28.4 | 270 | 298.5 | 8 |
| 10" | 406 | 30.2 | 324 | 362.0 | 12 |
| 12" | 483 | 31.8 | 381 | 431.8 | 12 |
| 14" | 533 | 35.1 | 413 | 476.3 | 12 |
| 16" | 597 | 36.6 | 470 | 539.8 | 16 |
| 18" | 635 | 39.6 | 533 | 577.9 | 16 |
| 20" | 699 | 42.9 | 584 | 635.0 | 20 |
| 24" | 813 | 47.8 | 692 | 749.3 | 20 |
Standard chemical composition and mechanical property ranges for the stainless and duplex flange grades supplied by Trident Metal Industries.
| Element | Composition (wt %) |
|---|---|
| Carbon (C) | 0.08 max (304) / 0.030 max (304L) |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.045 max |
| Sulphur (S) | 0.030 max |
| Chromium (Cr) | 18.00 – 20.00 |
| Nickel (Ni) | 8.00 – 10.50 (304) / 8.00 – 12.00 (304L) |
| Nitrogen (N) | 0.10 max |
| Property | Typical Value |
|---|---|
| Tensile Strength | 515 MPa min (304) / 485 MPa min (304L) |
| Yield Strength (0.2% Proof) | 205 MPa min (304) / 170 MPa min (304L) |
| Elongation at Break | 35% min |
| Hardness | ≤ 201 HB / 92 HRB |
| Element | Composition (wt %) |
|---|---|
| Carbon (C) | 0.08 max (316) / 0.030 max (316L) |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 0.75 max |
| Phosphorus (P) | 0.045 max |
| Sulphur (S) | 0.030 max |
| Chromium (Cr) | 16.00 – 18.00 |
| Nickel (Ni) | 10.00 – 14.00 |
| Molybdenum (Mo) | 2.00 – 3.00 |
| Nitrogen (N) | 0.10 max |
| Property | Typical Value |
|---|---|
| Tensile Strength | 515 MPa min (316) / 485 MPa min (316L) |
| Yield Strength (0.2% Proof) | 205 MPa min (316) / 170 MPa min (316L) |
| Elongation at Break | 35% min (40% for 316L) |
| Hardness | ≤ 217 HB / 95 HRB |
| Element | Composition (wt %) |
|---|---|
| Carbon (C) | 0.030 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.030 max |
| Sulphur (S) | 0.020 max |
| Chromium (Cr) | 22.0 – 23.0 |
| Nickel (Ni) | 4.5 – 6.5 |
| Molybdenum (Mo) | 3.0 – 3.5 |
| Nitrogen (N) | 0.14 – 0.20 |
| Property | Typical Value |
|---|---|
| Tensile Strength | 620 MPa min |
| Yield Strength (0.2% Proof) | 450 MPa min |
| Elongation at Break | 25% min |
| Hardness | ≤ 293 HB / 30 HRC |
| Element | Composition (wt %) |
|---|---|
| Carbon (C) | 0.030 max |
| Manganese (Mn) | 1.20 max |
| Silicon (Si) | 0.80 max |
| Phosphorus (P) | 0.035 max |
| Sulphur (S) | 0.020 max |
| Chromium (Cr) | 24.0 – 26.0 |
| Nickel (Ni) | 6.0 – 8.0 |
| Molybdenum (Mo) | 3.0 – 5.0 |
| Nitrogen (N) | 0.24 – 0.32 |
| Property | Typical Value |
|---|---|
| Tensile Strength | 795 MPa min |
| Yield Strength (0.2% Proof) | 550 MPa min |
| Elongation at Break | 15% min |
| Hardness | ≤ 310 HB / 32 HRC |
Send us the product, grade, size and quantity — we will come back with availability, pricing and a despatch date.
Trident Metal Industries — global sourcing, reliable supply and competitive pricing for pipes, tubes, fittings, flanges, sheets, plates and rods.
© Copyright Trident Metal Industries, All Rights Reserved.
Trident Metal Industries sources and supplies metal products for fabricators, contractors and project buyers.