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| Place of Origin | China |
| Brand Name | Kasugai |
| Model Number | ASTM A182 F304 ANSI B16.5 WN RF CL300 |
| Document | Product Brochure PDF |
ANSI B16.5 3 Inch Stainless Steel Flange Long Weld Neck Flange
Long Weld Neck Flange Information
A stainless steel long weld neck flange is a type of flange commonly used in high-pressure and high-temperature piping systems.
The long weld neck flange has a long tapered hub and a neck that extends from the flange body. The length of the neck is longer compared to standard weld neck flanges. The extended neck provides additional reinforcement and allows for easy alignment during welding.
Stainless steel long weld neck flanges are available in various pressure ratings, typically ranging from 150 lbs to 2500 lbs. The pressure rating indicates the maximum allowable pressure the flange can withstand.
| Product Name | ASTM A182 F304 ANSI B16.5 WN RF Class 300 Stainless Steel Weld Neck Raised Face Flange |
| Size Range | 1/2” to 24” |
| Pressure Class | Class 300 |
| Standards | ASTM A182 F304 |
| Face Type | WNRF-Weld Neck Raised Face |
| Specification | ANSI B16.5 |
ASTM A182 F304
ASTM A182 F304 is a forging material specification for 304 grade stainless steel and is used for manufacturing bare forgings or gorged and machined products for applications involving high temperature service.
ASTM A182 F304 Chemical Composition (%)
| Grade | C, max | Mn, max | P, max | S, max | Si, max | Ni | Cr | N |
| F304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 8.0~11.0 | 18.0~20.0· | 0.10 |
ASTM A182 F304 Mechanical Properties
| Grade |
Tensile Strength, min (MPa) |
Yield Strength, min (MPa) |
Elongation in 2inches, min (%) |
Reduction of Area, min (%) |
Hardness (HBW) |
| F304 | 515 | 205 | 30 | 50 | ﹍ |
Face Type: Raised Face (RF)
The Raised Face flange is the most common type used in process plant applications, and is easily to identify. It is referred to as a raised face because the gasket surfaces are raised above the bolting circle face. This face type allows the use of a wide combination of gasket designs, including flat ring sheet types and metallic composites such as spiral wound and double jacketed types.
The purpose of a RF flange is to concentrate more pressure on a smaller gasket area and thereby increase the pressure containment capability of the joint. Diameter and height are in ASME B16.5 defined, by pressure class and diameter. Pressure rating of the flange determines the height of the raised face.
ANSI B16.5 Flange Dimensions - Class 300 (mm)
| Nominal Size | Outside Dia. | Thickness | Length thru Hub | Dia. of Hub | Raised Face Dia. | Corner Radius of Bore | Depth of Socket | Counter Bore | Thread Length | Bolt Holes | |||||
| WN |
SO SW TR |
LJ | LJ | SW | TR | Bolt Circle Dia. | No | Dia. | |||||||
| A | B | O | t | Y1 | Y2 | Y3 | X | R | r1 | D | B4 | Q | C | H | |
| 15 | 1/2 | 95 | 14.3 | 52.3 | 22 | 38.0 | 35.1 | 3 | 10 | 23.5 | 15.7 | 66.5 | 4 | 16 | |
| 20 | 3/4 | 117 | 15.8 | 57.2 | 25 | 48.0 | 42.9 | 3 | 11 | 29.0 | 15.7 | 82.6 | 4 | 19 | |
| 25 | 1 | 124 | 17.6 | 62.0 | 27 | 54.0 | 50.8 | 3 | 13 | 36.0 | 17.5 | 88.9 | 4 | 19 | |
| 32 | 1-1/4 | 133 | 19.1 | 65.0 | 27 | 63.4 | 63.5 | 5 | 14 | 44.5 | 20.6 | 98.6 | 4 | 19 | |
| 40 | 1-1/2 | 155 | 20.6 | 6.3 | 30 | 70.0 | 73.2 | 6 | 16 | 50.5 | 22.4 | 114.3 | 4 | 22 | |
| 50 | 2 | 165 | 22.4 | 69.8 | 33 | 84.0 | 91.9 | 8 | 18 | 63.5 | 28.4 | 127.0 | 8 | 19 | |
| 65 | 2-/21 | 190 | 25.4 | 76.2 | 38 | 100 | 104.6 | 8 | 19 | 76.0 | 31.8 | 149.4 | 8 | 22 | |
| 80 | 3 | 210 | 28.5 | 79.2 | 43 | 117 | 127.0 | 10 | 21 | 92.0 | 31.8 | 168.1 | 8 | 22 | |
| 90 | 3-1/2 | 229 | 30.3 | 81.0 | 44 | 133 | 139.7 | 10 | 105.0 | 36.6 | 184.2 | 8 | 22 | ||
| 100 | 4 | 254 | 31.8 | 85.9 | 48 | 146 | 157.2 | 11 | 118.0 | 36.6 | 200.2 | 8 | 22 | ||
| 125 | 5 | 279 | 35.1 | 98.6 | 51 | 178 | 185.7 | 11 | 145.0 | 42.9 | 235.0 | 8 | 22 | ||
| 150 | 6 | 318 | 36.6 | 98.6 | 52 | 206 | 215.9 | 13 | 171.0 | 46.0 | 269.7 | 12 | 22 | ||
| 200 | 8 | 381 | 41.2 | 111.3 | 62 | 260 | 269.7 | 13 | 222.0 | 50.8 | 330.2 | 12 | 26 | ||
| 250 | 10 | 444 | 47.8 | 117.3 | 67 | 95 | 321 | 323.8 | 13 | 276.0 | 55.6 | 387.4 | 16 | 29 | |
| 300 | 12 | 520 | 50.8 | 130.0 | 73 | 102 | 375 | 381.0 | 13 | 329.0 | 60.5 | 450.8 | 16 | 32 | |
| 350 | 14 | 585 | 53.9 | 142.7 | 76 | 111 | 425 | 412.8 | 13 | 360.0 | 63.5 | 514.4 | 20 | 32 | |
| 400 | 16 | 650 | 57.2 | 146.0 | 83 | 121 | 483 | 469.9 | 13 | 411.0 | 68.3 | 571.5 | 20 | 35 | |
| 450 | 18 | 710 | 60.5 | 158.8 | 89 | 130 | 533 | 533.4 | 13 | 462.0 | 69.8 | 628.6 | 24 | 35 | |
| 500 | 20 | 775 | 63.5 | 162.1 | 95 | 140 | 587 | 584.2 | 13 | 513.0 | 73.2 | 685.8 | 24 | 35 | |
| 600 | 24 | 915 | 69.9 | 168.1 | 106 | 152 | 702 | 692.2 | 13 | 614.0 | 82.6 | 812.8 | 24 | 42 | |
| Nominal Size | Dimensions of Ring Joint Flanges | Weight (kg) | |||||||||||
| Groove Number | Dia. of Raised Portion | Pitch Dia. | Depth | Width | Radius at Bottom |
WN Sch 40 |
SO | BL |
SW Sch 40 |
LJ | TR | ||
| A | B | K | P | E | F | r2 | |||||||
| 15 | 1/2 | R11 | 51.0 | 34.14 | 5.56 | 7.14 | 0.8 | 0.75 | 0.65 | 0.65 | 0.66 | 0.71 | 0.65 |
| 20 | 3/4 | R13 | 63.5 | 42.88 | 6.35 | 8.74 | 0.8 | 1.27 | 1.11 | 1.11 | 1.14 | 1.20 | 1.10 |
| 25 | 1 | R16 | 70.0 | 50.80 | 6.35 | 8.74 | 0.8 | 1.64 | 1.39 | 1.43 | 1.43 | 1.49 | 1.35 |
| 32 | 1-1/4 | R18 | 79.5 | 60.32 | 6.35 | 8.74 | 0.8 | 2.07 | 1.70 | 1.83 | 1.75 | 1.81 | 1.69 |
| 40 | 1-1/2 | R20 | 90.5 | 68.28 | 6.35 | 8.74 | 0.8 | 2.94 | 2.51 | 2.69 | 2.58 | 2.66 | 2.54 |
| 50 | 2 | R23 | 108 | 82.55 | 7.92 | 11.91 | 0.8 | 3.45 | 2.91 | 3.22 | 2.97 | 3.02 | 2.92 |
| 65 | 2-/21 | R26 | 127 | 101.60 | 7.92 | 11.91 | 0.8 | 5.10 | 4.22 | 4.86 | 4.41 | 4.37 | 4.24 |
| 80 | 3 | R31 | 147 | 123.82 | 7.92 | 11.91 | 0.8 | 6.25 | 5.88 | 6.83 | 6.15 | 6.04 | 5.94 |
| 90 | 3-1/2 | R34 | 159 | 131.78 | 7.92 | 11.91 | 0.8 | 8.78 | 7.44 | 8.85 | 7.64 | 7.90 | |
| 100 | 4 | R37 | 175 | 149.22 | 7.92 | 11.91 | 0.8 | 11.4 | 9.73 | 11.8 | 9.98 | 9.71 | |
| 125 | 5 | R41 | 210 | 180.98 | 7.92 | 11.91 | 0.8 | 15.4 | 12.5 | 15.8 | 12.7 | 12.4 | |
| 150 | 6 | R45 | 242 | 211.12 | 7.92 | 11.91 | 0.8 | 19.8 | 16.2 | 21.3 | 16.5 | 16.2 | |
| 200 | 8 | R49 | 302 | 269.88 | 7.92 | 11.91 | 0.8 | 30.5 | 24.8 | 34.6 | 25.2 | 24.8 | |
| 250 | 10 | R53 | 356 | 323.85 | 7.92 | 11.91 | 0.8 | 44.1 | 35.5 | 54 | 40.2 | 35.9 | |
| 300 | 12 | R57 | 413 | 381.00 | 7.92 | 11.91 | 0.8 | 64 | 51 | 79 | 58 | 51.5 | |
| 350 | 14 | R61 | 458 | 419.90 | 7.92 | 11.91 | 0.8 | 88 | 70 | 106 | 86.2 | 70.1 | |
| 400 | 16 | R65 | 508 | 469.90 | 7.92 | 11.91 | 0.8 | 113 | 90 | 139 | 113.4 | 90.4 | |
| 450 | 18 | R69 | 575 | 533.40 | 7.92 | 11.91 | 0.8 | 138 | 109 | 175 | 133.8 | 109.0 | |
| 500 | 20 | R73 | 635 | 584.20 | 9.52 | 13.49 | 1.5 | 169 | 135 | 221 | 167.8 | 136.0 | |
| 600 | 24 | R77 | 750 | 692.15 | 11.13 | 16.66 | 1.5 | 249 | 204 | 341 | 249.5 | 204.0 | |
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