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ASME B16.5 is a standard developed by the American Society of Mechanical Engineers for pipe flanges and flange connections. This standard provides detailed specifications for flanges of various sizes, pressure levels, materials, and surface types to meet the needs of various industrial applications. ASME B16.5 Class 600 weld neck flange, as an important type, is widely used in industries such as petroleum, chemical, natural gas, power, pharmaceuticals, and food.Class 600 weld neck flange dimensions are governed by the ASME B16.5 standards and provide the 600Lb pressure capacity.
Specification of Weld Neck Flange
| Shape Type | Regular and Long Neck |
| Sealing Face | RF, FF, FTJ |
| Size Range | 1/2″ – 60″/ DN15 – DN1200 |
| Pressure Rating | Class 150, 300, 600, 900, 1500, 2500lb |
| Standard | ASME B16.5, ASME B16.47 Series A/B |
| Alloy Steel | ASTM A182 F11 / 12 / 5 / 9 / 91 / 92 |
| Stainless Steel | ASTM A182 F304/304L/304H, 316/316L, 310S, 317,347,904L |
| Duplex Stainless Steel | ASTM A182 F51, F53, F44 |
ASME B16.5 Class 600 Weld Neck Flange Dimension
Class 600 weld Neck Flanges 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.
| Pipe | FlangeData | Hub Data | Raised | DrillingData | Weight | |||||||
| Face | ||||||||||||
| Nominal | A | B | C | D | E | F | G | H | I | J | ||
| PipeSize | Outside | Overall | Inside | Flange | Overall | Diameter | Hub | Face | Number | BoltHole | Diameter | kg/ piece |
| Diameter | Diameter | Diameter | Thickness | Length | at Weld | Diameter | Diameter | of Holes | Diameter | ofCircle | ||
| min | Bevel | ofHoles | ||||||||||
| in | in | in | in | in | in | in | in | in | in | |||
| mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | |||
| 1/2 | 0.84 | 3.75 | To be specified by Purhcaser | 0.56 | 2.06 | 0.84 | 1.5 | 1.38 | 4 | 0.62 | 2.62 | 0.87 |
| 21.3 | 95.3 | 14.2 | 52.3 | 21.3 | 38.1 | 35 | 15.7 | 66.55 | ||||
| 3/4 | 1.05 | 4.62 | 0.62 | 2.25 | 1.05 | 1.88 | 1.69 | 4 | 0.75 | 3.25 | 1.45 | |
| 26.7 | 117.3 | 15.7 | 57.15 | 26.7 | 47.8 | 42.9 | 19.1 | 82.6 | ||||
| 1 | 1.315 | 4.88 | 0.69 | 2.44 | 1.32 | 2.12 | 2 | 4 | 0.75 | 3.5 | 1.76 | |
| 33.4 | 124 | 17.5 | 62 | 33.5 | 53.8 | 50.8 | 19.1 | 88.9 | ||||
| 1-1/4 | 1.66 | 5.25 | 0.81 | 2.62 | 1.66 | 2.5 | 2.5 | 4 | 0.75 | 3.88 | 2.49 | |
| 42.2 | 133.4 | 20.6 | 66.55 | 42.2 | 63.5 | 63.5 | 19.1 | 98.6 | ||||
| 1-1/2 | 1.9 | 6.12 | 0.88 | 2.75 | 1.9 | 2.75 | 2.88 | 4 | 0.88 | 4.5 | 3.49 | |
| 48.3 | 155.4 | 22.4 | 69.85 | 48.3 | 69.85 | 73.15 | 22.4 | 114.3 | ||||
| 2 | 2.375 | 6.5 | 1 | 2.88 | 2.38 | 3.31 | 3.62 | 8 | 0.75 | 5 | 4.36 | |
| 60.3 | 165.1 | 25.4 | 73.15 | 60.45 | 84.1 | 91.9 | 19.1 | 127 | ||||
| 2-1/2 | 2.875 | 7.5 | 1.12 | 3.12 | 2.88 | 3.94 | 4.12 | 8 | 0.88 | 5.88 | 6.43 | |
| 73 | 190.5 | 28.4 | 79.25 | 73.15 | 100.1 | 104.6 | 22.4 | 149.4 | ||||
| 3 | 3.5 | 8.25 | 1.25 | 3.25 | 3.5 | 4.62 | 5 | 8 | 0.88 | 6.62 | 8.53 | |
| 88.9 | 209.6 | 31.75 | 82.6 | 88.9 | 117.3 | 127 | 22.4 | 168.1 | ||||
| 3-1/2 | 4 | 9 | 1.38 | 3.38 | 4 | 5.25 | 5.5 | 8 | 1 | 7.25 | 10.7 | |
| 101.6 | 228.6 | 35.1 | 85.9 | 101.6 | 133.4 | 139.7 | 25.4 | 184.2 | ||||
| 4 | 4.5 | 10.75 | 1.5 | 4 | 4.5 | 6 | 6.19 | 8 | 1 | 8.5 | 17.4 | |
| 114.3 | 273.1 | 38.1 | 101.6 | 114.3 | 152.4 | 157.2 | 25.4 | 215.9 | ||||
| 5 | 5.563 | 13 | 1.75 | 4.5 | 5.56 | 7.44 | 7.31 | 8 | 1.12 | 10.5 | 29.2 | |
| 141.3 | 330.2 | 44.5 | 114.3 | 141.2 | 189 | 185.7 | 28.4 | 266.7 | ||||
| 6 | 6.625 | 14 | 1.88 | 4.62 | 6.63 | 8.75 | 8.5 | 12 | 1.12 | 11.5 | 34.9 | |
| 168.3 | 355.6 | 47.8 | 117.3 | 168.4 | 222.3 | 215.9 | 28.4 | 292.1 | ||||
| 8 | 8.625 | 16.5 | 2.19 | 5.25 | 8.63 | 10.75 | 10.62 | 12 | 1.25 | 13.75 | 53.9 | |
| 219.1 | 419.1 | 55.6 | 133.4 | 219.2 | 273.1 | 269.7 | 31.75 | 349.3 | ||||
| 10 | 10.75 | 20 | 2.5 | 6 | 10.75 | 13.5 | 12.75 | 16 | 1.38 | 17 | 86.5 | |
| 273 | 508 | 63.5 | 152.4 | 273 | 342.9 | 323.8 | 35.1 | 431.8 | ||||
| 12 | 12.75 | 22 | 2.62 | 6.12 | 12.75 | 15.75 | 15 | 20 | 1.38 | 19.25 | 103 | |
| 323.8 | 558.8 | 66.55 | 155.4 | 323.8 | 400.1 | 381 | 35.1 | 489 | ||||
| 14 | 14 | 23.75 | 2.75 | 6.5 | 14 | 17 | 16.25 | 20 | 1.5 | 20.75 | 122 | |
| 355.6 | 603.3 | 69.85 | 165.1 | 355.6 | 431.8 | 412.7 | 38.1 | 527.1 | ||||
| 16 | 16 | 27 | 3 | 7 | 16 | 19.5 | 18.5 | 20 | 1.62 | 23.75 | 170 | |
| 406.4 | 685.8 | 76.2 | 177.8 | 406.4 | 495.3 | 469.9 | 41.1 | 603.3 | ||||
| 18 | 18 | 29.25 | 3.25 | 7.25 | 18 | 21.5 | 21 | 20 | 1.75 | 25.75 | 204 | |
| 457.2 | 743 | 82.6 | 184.2 | 457.2 | 546.1 | 533.4 | 44.5 | 654.1 | ||||
| 20 | 20 | 32 | 3.5 | 7.5 | 20 | 24 | 23 | 24 | 1.75 | 28.5 | 254 | |
| 508 | 812.8 | 88.9 | 190.5 | 508 | 609.6 | 584.2 | 44.5 | 723.9 | ||||
| 24 | 24 | 37 | 4 | 8 | 24 | 28.25 | 27.25 | 24 | 2 | 33 | 358 | |
| 609.6 | 939.8 | 101.6 | 203.2 | 609.6 | 717.6 | 692.1 | 50.8 | 838.2 | ||||
Material Grade of ASTM A182 Flange
Alloy Material For Class 600 Weld Neck Flange
ASTM A182 F11 is a relatively common alloy flange, which is divided into three grades, each with different chemical composition and mechanical property requirements, to accommodate different environments for pipeline systems.
Chemical Composition
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Cr | Mo |
| ASTM A182 F11 CL1 | MIN | 0.05 | 0.30 | 0.50 | 1.00 | 0.44 | ||
| MAX | 0.15 | 0.60 | 0.03 | 0.03 | 1.00 | 0.65 | ||
| ASTM A182 F11 CL2 | MIN | 0.10 | 0.30 | 0.50 | 1.00 | 0.44 | ||
| MAX | 0.20 | 0.80 | 0.04 | 0.04 | 1.00 | 0.65 | ||
| ASTM A182 F11 CL3 | MIN | 0.05 | 0.30 | 0.50 | 1.00 | 0.44 | ||
| MAX | 0.15 | 0.60 | 0.03 | 0.03 | 1.00 | 0.65 |
Mechanical Properties
| MATERIAL | ASTM A182 F11 CL1 | ASTM A182 F11 CL2 | ASTM A182 F11 CL3 |
| T.S (MPA) | 415 min | 485 min | 515 min |
| Y.S (MPA) | 205 min | 275 min | 310 min |
| EL % | 20 min | 20 min | 20 min |
| R/A % | 45 min | 30 min | 30 min |
| HARDNESS | 121-174 | 143-207 | 150-207 |
Alloy steel class 600 weld neck flange have strong corrosion resistance, high temperature resistance, excellent sealing performance, and rigid and elastic requirements, and are widely used in various industrial fields.ASTM A182 Stainless Steel Flange
ASTM A182 F304/304H/304L are all austenitic stainless steel materials, which are commonly used in the raw materials of ASTM A182 class 600 weld neck flange. Their prices are relatively cheaper than stainless steel materials such as 316 and 904, so they are widely used in pipeline systems.
Chemical Composition
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr | N |
| ASTM A182 F304 | MIN | 8.00 | 18.00 | ||||||
| MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 11.00 | 20.00 | 0.10 | |
| ASTM A182 F304L | MIN | 8.00 | 18.00 | ||||||
| MAX | 0.03 | 2.00 | 0.045 | 0.030 | 1.00 | 13.00 | 20.00 | 0.10 | |
| ASTM A182 F304H | MIN | 0.04 | 8.00 | 18.00 | |||||
| MAX | 0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 11.00 | 20.00 |
Mechanical Properties
| MATERIAL | T.S (MPA) | Y.S (MPA) | EL % | R/A % |
| ASTM A182 F304 | 515 min | 205 min | 30 min | 50 min |
| ASTM A182 F304L | 485 min | 170 min | 30 min | 50 min |
| ASTM A182 F304H | 515 min | 205 min | 30 min | 50 min |
ASME B16.5 is a standard developed by the American Society of Mechanical Engineers for pipe flanges and flange connections. This standard provides detailed specifications for flanges of various sizes, pressure levels, materials, and surface types to meet the needs of various industrial applications. ASME B16.5 Class 600 weld neck flange, as an important type, is widely used in industries such as petroleum, chemical, natural gas, power, pharmaceuticals, and food.Class 600 weld neck flange dimensions are governed by the ASME B16.5 standards and provide the 600Lb pressure capacity.
Specification of Weld Neck Flange
| Shape Type | Regular and Long Neck |
| Sealing Face | RF, FF, FTJ |
| Size Range | 1/2″ – 60″/ DN15 – DN1200 |
| Pressure Rating | Class 150, 300, 600, 900, 1500, 2500lb |
| Standard | ASME B16.5, ASME B16.47 Series A/B |
| Alloy Steel | ASTM A182 F11 / 12 / 5 / 9 / 91 / 92 |
| Stainless Steel | ASTM A182 F304/304L/304H, 316/316L, 310S, 317,347,904L |
| Duplex Stainless Steel | ASTM A182 F51, F53, F44 |
ASME B16.5 Class 600 Weld Neck Flange Dimension
Class 600 weld Neck Flanges 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.
| Pipe | FlangeData | Hub Data | Raised | DrillingData | Weight | |||||||
| Face | ||||||||||||
| Nominal | A | B | C | D | E | F | G | H | I | J | ||
| PipeSize | Outside | Overall | Inside | Flange | Overall | Diameter | Hub | Face | Number | BoltHole | Diameter | kg/ piece |
| Diameter | Diameter | Diameter | Thickness | Length | at Weld | Diameter | Diameter | of Holes | Diameter | ofCircle | ||
| min | Bevel | ofHoles | ||||||||||
| in | in | in | in | in | in | in | in | in | in | |||
| mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | |||
| 1/2 | 0.84 | 3.75 | To be specified by Purhcaser | 0.56 | 2.06 | 0.84 | 1.5 | 1.38 | 4 | 0.62 | 2.62 | 0.87 |
| 21.3 | 95.3 | 14.2 | 52.3 | 21.3 | 38.1 | 35 | 15.7 | 66.55 | ||||
| 3/4 | 1.05 | 4.62 | 0.62 | 2.25 | 1.05 | 1.88 | 1.69 | 4 | 0.75 | 3.25 | 1.45 | |
| 26.7 | 117.3 | 15.7 | 57.15 | 26.7 | 47.8 | 42.9 | 19.1 | 82.6 | ||||
| 1 | 1.315 | 4.88 | 0.69 | 2.44 | 1.32 | 2.12 | 2 | 4 | 0.75 | 3.5 | 1.76 | |
| 33.4 | 124 | 17.5 | 62 | 33.5 | 53.8 | 50.8 | 19.1 | 88.9 | ||||
| 1-1/4 | 1.66 | 5.25 | 0.81 | 2.62 | 1.66 | 2.5 | 2.5 | 4 | 0.75 | 3.88 | 2.49 | |
| 42.2 | 133.4 | 20.6 | 66.55 | 42.2 | 63.5 | 63.5 | 19.1 | 98.6 | ||||
| 1-1/2 | 1.9 | 6.12 | 0.88 | 2.75 | 1.9 | 2.75 | 2.88 | 4 | 0.88 | 4.5 | 3.49 | |
| 48.3 | 155.4 | 22.4 | 69.85 | 48.3 | 69.85 | 73.15 | 22.4 | 114.3 | ||||
| 2 | 2.375 | 6.5 | 1 | 2.88 | 2.38 | 3.31 | 3.62 | 8 | 0.75 | 5 | 4.36 | |
| 60.3 | 165.1 | 25.4 | 73.15 | 60.45 | 84.1 | 91.9 | 19.1 | 127 | ||||
| 2-1/2 | 2.875 | 7.5 | 1.12 | 3.12 | 2.88 | 3.94 | 4.12 | 8 | 0.88 | 5.88 | 6.43 | |
| 73 | 190.5 | 28.4 | 79.25 | 73.15 | 100.1 | 104.6 | 22.4 | 149.4 | ||||
| 3 | 3.5 | 8.25 | 1.25 | 3.25 | 3.5 | 4.62 | 5 | 8 | 0.88 | 6.62 | 8.53 | |
| 88.9 | 209.6 | 31.75 | 82.6 | 88.9 | 117.3 | 127 | 22.4 | 168.1 | ||||
| 3-1/2 | 4 | 9 | 1.38 | 3.38 | 4 | 5.25 | 5.5 | 8 | 1 | 7.25 | 10.7 | |
| 101.6 | 228.6 | 35.1 | 85.9 | 101.6 | 133.4 | 139.7 | 25.4 | 184.2 | ||||
| 4 | 4.5 | 10.75 | 1.5 | 4 | 4.5 | 6 | 6.19 | 8 | 1 | 8.5 | 17.4 | |
| 114.3 | 273.1 | 38.1 | 101.6 | 114.3 | 152.4 | 157.2 | 25.4 | 215.9 | ||||
| 5 | 5.563 | 13 | 1.75 | 4.5 | 5.56 | 7.44 | 7.31 | 8 | 1.12 | 10.5 | 29.2 | |
| 141.3 | 330.2 | 44.5 | 114.3 | 141.2 | 189 | 185.7 | 28.4 | 266.7 | ||||
| 6 | 6.625 | 14 | 1.88 | 4.62 | 6.63 | 8.75 | 8.5 | 12 | 1.12 | 11.5 | 34.9 | |
| 168.3 | 355.6 | 47.8 | 117.3 | 168.4 | 222.3 | 215.9 | 28.4 | 292.1 | ||||
| 8 | 8.625 | 16.5 | 2.19 | 5.25 | 8.63 | 10.75 | 10.62 | 12 | 1.25 | 13.75 | 53.9 | |
| 219.1 | 419.1 | 55.6 | 133.4 | 219.2 | 273.1 | 269.7 | 31.75 | 349.3 | ||||
| 10 | 10.75 | 20 | 2.5 | 6 | 10.75 | 13.5 | 12.75 | 16 | 1.38 | 17 | 86.5 | |
| 273 | 508 | 63.5 | 152.4 | 273 | 342.9 | 323.8 | 35.1 | 431.8 | ||||
| 12 | 12.75 | 22 | 2.62 | 6.12 | 12.75 | 15.75 | 15 | 20 | 1.38 | 19.25 | 103 | |
| 323.8 | 558.8 | 66.55 | 155.4 | 323.8 | 400.1 | 381 | 35.1 | 489 | ||||
| 14 | 14 | 23.75 | 2.75 | 6.5 | 14 | 17 | 16.25 | 20 | 1.5 | 20.75 | 122 | |
| 355.6 | 603.3 | 69.85 | 165.1 | 355.6 | 431.8 | 412.7 | 38.1 | 527.1 | ||||
| 16 | 16 | 27 | 3 | 7 | 16 | 19.5 | 18.5 | 20 | 1.62 | 23.75 | 170 | |
| 406.4 | 685.8 | 76.2 | 177.8 | 406.4 | 495.3 | 469.9 | 41.1 | 603.3 | ||||
| 18 | 18 | 29.25 | 3.25 | 7.25 | 18 | 21.5 | 21 | 20 | 1.75 | 25.75 | 204 | |
| 457.2 | 743 | 82.6 | 184.2 | 457.2 | 546.1 | 533.4 | 44.5 | 654.1 | ||||
| 20 | 20 | 32 | 3.5 | 7.5 | 20 | 24 | 23 | 24 | 1.75 | 28.5 | 254 | |
| 508 | 812.8 | 88.9 | 190.5 | 508 | 609.6 | 584.2 | 44.5 | 723.9 | ||||
| 24 | 24 | 37 | 4 | 8 | 24 | 28.25 | 27.25 | 24 | 2 | 33 | 358 | |
| 609.6 | 939.8 | 101.6 | 203.2 | 609.6 | 717.6 | 692.1 | 50.8 | 838.2 | ||||
Material Grade of ASTM A182 Flange
Alloy Material For Class 600 Weld Neck Flange
ASTM A182 F11 is a relatively common alloy flange, which is divided into three grades, each with different chemical composition and mechanical property requirements, to accommodate different environments for pipeline systems.
Chemical Composition
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Cr | Mo |
| ASTM A182 F11 CL1 | MIN | 0.05 | 0.30 | 0.50 | 1.00 | 0.44 | ||
| MAX | 0.15 | 0.60 | 0.03 | 0.03 | 1.00 | 0.65 | ||
| ASTM A182 F11 CL2 | MIN | 0.10 | 0.30 | 0.50 | 1.00 | 0.44 | ||
| MAX | 0.20 | 0.80 | 0.04 | 0.04 | 1.00 | 0.65 | ||
| ASTM A182 F11 CL3 | MIN | 0.05 | 0.30 | 0.50 | 1.00 | 0.44 | ||
| MAX | 0.15 | 0.60 | 0.03 | 0.03 | 1.00 | 0.65 |
Mechanical Properties
| MATERIAL | ASTM A182 F11 CL1 | ASTM A182 F11 CL2 | ASTM A182 F11 CL3 |
| T.S (MPA) | 415 min | 485 min | 515 min |
| Y.S (MPA) | 205 min | 275 min | 310 min |
| EL % | 20 min | 20 min | 20 min |
| R/A % | 45 min | 30 min | 30 min |
| HARDNESS | 121-174 | 143-207 | 150-207 |
Alloy steel class 600 weld neck flange have strong corrosion resistance, high temperature resistance, excellent sealing performance, and rigid and elastic requirements, and are widely used in various industrial fields.ASTM A182 Stainless Steel Flange
ASTM A182 F304/304H/304L are all austenitic stainless steel materials, which are commonly used in the raw materials of ASTM A182 class 600 weld neck flange. Their prices are relatively cheaper than stainless steel materials such as 316 and 904, so they are widely used in pipeline systems.
Chemical Composition
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr | N |
| ASTM A182 F304 | MIN | 8.00 | 18.00 | ||||||
| MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 11.00 | 20.00 | 0.10 | |
| ASTM A182 F304L | MIN | 8.00 | 18.00 | ||||||
| MAX | 0.03 | 2.00 | 0.045 | 0.030 | 1.00 | 13.00 | 20.00 | 0.10 | |
| ASTM A182 F304H | MIN | 0.04 | 8.00 | 18.00 | |||||
| MAX | 0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 11.00 | 20.00 |
Mechanical Properties
| MATERIAL | T.S (MPA) | Y.S (MPA) | EL % | R/A % |
| ASTM A182 F304 | 515 min | 205 min | 30 min | 50 min |
| ASTM A182 F304L | 485 min | 170 min | 30 min | 50 min |
| ASTM A182 F304H | 515 min | 205 min | 30 min | 50 min |
