Size: 1/2" (DN15) - 100" (DN2500)
BS4504, BS4504, BS1560, BS10, etc
Weld Neck Flanges Material & Grades:
Stainless Steel Weld Neck Flanges: ASTM A182, A240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L
Carbon Steel Weld Neck Flanges: ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F70
Alloy Steel Weld Neck Flanges: ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91
Duplex Steel Weld Neck Flanges: ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61
Super Duplex Weld Neck Flanges: ASTM / ASME A/SA 182, A240 F 44, F 45, F51, F 53, F 55, F 60, F 61
Nickel Alloy Weld Neck Flanges: Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), etc
Copper Alloy Weld Neck Flanges: UNS No. C10100, 10200, 10300, 10800, 12000, 12200, 70600, 71500, UNS No. C 70600 (Cu -Ni- 90/10), C 71500 (Cu-Ni-70/30)
Low Temperature Carbon Steel Weld Neck Flanges: ASTM A350, LF2, LF3
Applications Of ANSI/ASME B16.5 Class 2500 Weld Neck Flanges
ANSI/ASME B16.5 Class 2500 Weld Neck Flanges are used in Chemical and petrochemical processing.
ANSI/ASME B16.5 Class 2500 Weld Neck Flanges are used in electronics.
ANSI/ASME B16.5 Class 2500 Weld Neck Flanges are used in processing equipment for maintaining product purity in handling foods, synthetic fibers.
ANSI/ASME B16.5 Class 2500 Weld Neck Flanges are used in marine and offshore engineering.
Characteristics of ANSI/ASME B16.5 Class 2500 Weld Neck Flanges
ANSI/ASME B16.5 Class 2500 Weld Neck Flanges are highly resistant to various reducing chemicals.
ANSI/ASME B16.5 Class 2500 Weld Neck Flanges are excellent resistance to caustic alkalies.
ANSI/ASME B16.5 Class 2500 Weld Neck Flanges are high electrical conductivity.
ANSI/ASME B16.5 Class 2500 Weld Neck Flanges are excellent corrosion resistance to distilled and natural waters.
ANSI/ASME B16.5 Class 2500 Weld Neck Flanges are resistance to neutral and alkaline salt solutions.
ANSI/ASME B16.5 Class 2500 Weld Neck Flanges are excellent resistance to dry fluorine.
ANSI/ASME B16.5 Class 2500 Weld Neck Flanges are widely used to handle caustic soda.
ANSI/ASME B16.5 Class 2500 Weld Neck Flanges are good thermal, electrical and magnetostrictive properties.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 304 | 0.08 max | 2 max | 0.75 max | 0.040 max | 0.030 max | 18 – 20 | – | 8 – 11 | |
| SS 316 | 0.08 max | 2 max | 0.75 max | 0.045 max | 0.030 max | 16 – 18 | 2 – 3 | 10 – 14 | 0.1 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
| Nominal Pipe Size | O.D. Flange | Thk. Of Flange Min | Diam. of Hub |
Hub Diam. Chamfer of W.N |
Length Hub.Y | Diam. of Bolt Circle |
Diam. of Bolt Holes |
Number of Bolts |
Diam. of Bolts (inch) |
KG | LB | |
| inch | dn | O | C | X | A | Y | BC | BH | BN | BD | ||
| 1/2" | 15 | 133.4 | 30.2 | 42.9 | 21.3 | 73.2 | 88.9 | 22.4 | 4 | 3/4" | 3.2 | 7 |
| 3/4" | 20 | 139.7 | 31.8 | 50.8 | 26.7 | 79.2 | 95.3 | 22.4 | 4 | 3/4" | 3.6 | 8 |
| 1" | 25 | 158.8 | 35.1 | 57.2 | 33.5 | 88.9 | 108 | 25.4 | 4 | 7/8" | 5.4 | 12 |
| 1-1/4" | 32 | 184.2 | 38.1 | 73.2 | 42.2 | 95.3 | 130 | 28.4 | 4 | 1" | 7.8 | 17.2 |
| 1-1/2" | 40 | 203.2 | 44.5 | 79.2 | 48.3 | 111.3 | 146.1 | 31.8 | 4 | 1 1/8" | 11.5 | 25.4 |
| 2" | 50 | 235 | 50.8 | 95.3 | 60.5 | 127 | 171.5 | 28.4 | 8 | 1" | 19 | 42 |
| 2-1/2" | 65 | 266.7 | 57.2 | 114.3 | 73.2 | 142.7 | 196.9 | 31.8 | 8 | 1 1/8" | 24 | 52 |
| 3" | 80 | 304.8 | 66.5 | 133.4 | 88.9 | 168.1 | 228.6 | 35.1 | 8 | 1 1/4" | 42.6 | 94 |
| 4" | 100 | 355.6 | 76.2 | 165.1 | 114.3 | 190.5 | 273.1 | 41.1 | 8 | 1 1/2" | 64 | 141 |
| 5" | 125 | 419.1 | 91.9 | 203.2 | 141.2 | 228.6 | 323.9 | 47.8 | 8 | 1 3/4" | 111 | 244 |
| 6" | 150 | 482.6 | 108 | 235 | 168.4 | 273.1 | 368.3 | 53.8 | 8 | 2" | 171 | 378 |
| 8" | 200 | 552.5 | 127 | 304.8 | 219.2 | 317.5 | 438.2 | 53.8 | 12 | 2" | 261 | 576 |
| 10" | 250 | 673.1 | 165.1 | 374.7 | 273.1 | 419.1 | 539.8 | 66.5 | 12 | 2 1/2" | 485 | 1068 |
| 12" | 300 | 762 | 184.2 | 441.5 | 323.9 | 463.6 | 619.3 | 73.2 | 12 | 2 3/4" | 698 | 1539 |
ANSI/ASME B16.5 Class 2500 Stainless Steel Weld Neck Flange are drilled with the wall thickness of the Flange having equal dimensions to the matching pipe. The lighter the pipe is the larger the bore is in the Weld Neck Flange. And conversely the heavier the pipe is the smaller the bore is in the Weld Neck Flange. Weld Neck Flanges are usually used in high pressure systems and are suitable for cold or hot temperatures.
