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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 |
ASTM A182 F304 Stainless Steel Flange Long Weld Neck Flange
Long Weld Neck Flange Information
A stainless steel long weld neck flange is a specific type of flange commonly used in high-pressure and high-temperature piping systems where corrosion resistance is crucial.
Stainless steel long weld neck flanges are made of stainless steel, which offers excellent corrosion resistance, durability, and strength. Common stainless steel grades used include 304, 316, and 316L.
Applications: Stainless steel long weld neck flanges are commonly used in industries such as oil and gas, chemical processing, petrochemical, and food processing, where resistance to corrosion and high temperatures is essential.
| 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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