Dimensions of ASME B16.5 Weld Neck Flange Bores
Dimensions of ASME B16.5 Weld Neck Flange Bores Manufacturer, Supplier, & Exporter in India – Trimac Piping Solutions
Trimac Piping Solutions is one of the largest Flanges Manufacturers, Supplier & Exporters in India. We offer our customers reliable, cost-effective, and high-quality superior Stainless Steel Flanges products according to international specification ASTM and dimensional specification ANSI/ASME B16.5 Flange. Extensive capability range, exceptional quality, and unrivaled customer service make Trimac Piping Solutions Flanges the premiere value solution for all of your flanges needs.
Nominal Bore For Weld Neck Flanges Chart
| NPS | OD | STD Wall | Sch 40 | Sch 60 | EXT Hvy | Sch 80 | Sch 100 | Sch 120 | Sch 140 | Sch 160 | XX Hvy | |
| 1/2″ | 15 | 21.3 | 15.8 | 15.8 | – | 13.9 | 13.9 | – | – | – | 11.8 | 6.4 |
| 3/4″ | 20 | 26.7 | 20.9 | 20.9 | – | 18.8 | 18.8 | – | – | – | 15.5 | 11 |
| 1″ | 25 | 33.4 | 26.6 | 26.6 | – | 24.3 | 24.3 | – | – | – | 20.7 | 15.2 |
| 1 1/4″ | 32 | 42.2 | 35.1 | 35.1 | – | 32.5 | 32.5 | – | – | – | 29.5 | 22.8 |
| 1 1/2″ | 40 | 48.3 | 40.9 | 40.9 | – | 38.1 | 38.1 | – | – | – | 34 | 27.9 |
| 2″ | 50 | 60.3 | 52.5 | 52.5 | – | 49.3 | 49.3 | – | – | – | 42.8 | 38.2 |
| 21/2″ | 65 | 73.00 | 62.7 | 62.7 | – | 59 | 59 | – | – | – | 54 | 45 |
| 3“ | 80 | 88.9 | 77.9 | 77.9 | – | 73.7 | 73.7 | – | – | – | 66.6 | 58.4 |
| 3 1/2″ | 90 | 101.6 | 90.1 | 90.1 | – | 85.4 | 85.4 | – | – | – | – | 69.3 |
| 4″ | 100 | 114.3 | 102.3 | 102.3 | – | 97.2 | 97.2 | – | 92 | – | 87.3 | 80.1 |
| 5″ | 125 | 141.3 | 128.2 | 128.2 | – | 122.3 | 122.3 | – | 115.9 | – | 109.6 | 103.2 |
| 6″ | 150 | 168.3 | 154.1 | 154.1 | – | 146.3 | 146.3 | – | 139.7 | – | 131.7 | 124.4 |
| 8“ | 200 | 219.1 | 202.7 | 202.7 | 198.5 | 193.7 | 193.7 | 188.9 | 182.5 | 177.8 | 173.1 | 174.6 |
| 10″ | 250 | 273.1 | 254.5 | 254.5 | 247.7 | 247.7 | 242.9 | 236.5 | 230.2 | 222.3 | 215.9 | 222.3 |
| 12″ | 300 | 323.9 | 304.8 | 303.2 | 295.3 | 298.5 | 288.9 | 281 | 273.1 | 266.7 | 257.2 | 273.1 |
| 14″ | 350 | 355.6 | 336.6 | 333.3 | 325 | 330.2 | 317.5 | 307.9 | 300 | 292.1 | 284.2 | – |
| 16″ | 400 | 406.4 | 387.4 | 381 | 373.1 | 381 | 363.5 | 354 | 344.5 | 333.3 | 325.4 | – |
| 18″ | 450 | 457.2 | 438.2 | 428.7 | 419.1 | 431.8 | 409.5 | 398.5 | 387.4 | 377.9 | 366.7 | – |
| 20“ | 500 | 508 | 489 | 477.8 | 466.8 | 482.6 | 455.6 | 442.9 | 431.8 | 419.1 | 408 | – |
| 24” | 600 | 609.6 | 590.6 | 574.6 | 560.4 | 584.2 | 547.7 | 531.8 | 517.6 | 504.9 | 490.5 | – |
Most Common Material for Steel Flanges
| Designation | Tensile Strength | Yield point | Chemical Analysis % | |||||||||
|
ASTM/ASME
|
lb/sq. in min.
|
N/mm2 min. |
ib/sq.in min.
|
N/mm2 min.
|
C
|
Si
|
Mn
|
P.max
|
S.max
|
Cr
|
Ni
|
Mo
|
For High Temperature – Service
| A/SA 105 | 70000 | 483 | 36000 | 248 | Max.0.35 | Max.0.35 | 0,60-1,05 | 0.04 | 0.5 | – | – | – |
Austentic Steel for High – Temperature Service
| Grade F304 | 75000 | 517 | 30000 | 207 | Max.0.08 | Max. 1,00 | Max. 2,00 | 0.04 | 0.03 | 18,0-20,0 | – | — |
| Grade F304 H | 75000 | 517 | 30000 | 207 | 0.04-0,10 | Max. 1,00 | Max. 2,00 | 0.04 | 0.03 | 18,0-20,0 | 8,0-11,0 | — |
| Grade F304 L | 75000 | 483 | 25000 | 172 | Max0,035 | Max. 1,00 | Max. 2,00 | 0.04 | 0.03 | 18,0-20,0 | 8,0-11,0 | — |
| Grade F316 | 75000 | 517 | 30000 | 207 | Max0.08 | Max. 1,00 | Max. 2,00 | 0.04 | 0.03 | 16,0-18,0 | 8,0-13,0 | 2,0-3,0 |
| Grade F316 H | 75000 | 517 | 30000 | 207 | 0,04-0,10 | Max. 1,00 | Max. 2,00 | 0.04 | 0.03 | 16,0-18,0 | 10,0-14,0 | 2,0-3,0 |
| Grade F316L | 75000 | 483 | 25000 | 172 | Max0,0035 | Max. 1,00 | Max. 2,00 | 0.04 | 0.03 | 16,0-18,0 | 10,0-14,0 | 2,0-3,0 |
For Low Temperature – Service
| Grade LF1 | 60000 | 414 | 30000 | 207 | Max. 0,30 | 0,15-0,30 | 0,75-1,05 | 0.035 | 0.04 | — | — | — |
| Grade LF2 | 70000 | 483 | 36000 | 248 | Max. 0,30 | 0,15-0,30 | max. 1,35 | 0.035 | 0.04 | — | — | — |
| Grade LF3 | 70000 | 483 | 37500 | 259 | Max . 0,20 | 0,20-0,35 | max. 0,90 | 0.035 | 0.04 | — | — | — |
Important Tolerance B16.5
|
Outside Diameter
|
O
|
If O< =610 MM | |
| If O < 610 MM | |||
|
Inside Diameter
|
B
|
IF NPS < = 10″ | |
| IF NPS > = 12″ | |||
|
Diameter Of HuB
|
X
|
IF NPS < = 12″ | |
| IF NPS > = 14″ | |||
|
Hub Dia at Weld Point
|
Ah
|
IF NPS < = 5″ | |
| IF NPS < = 6″ | |||
|
Raised Face Dia
|
R
|
IF 150#, 300# | |
| IF 400# > = | |||
|
Drilling
|
W
|
PCD | |
| Hole Spacing | If O< =610 MM | ||
|
Flange Thickness
|
tf
|
If NPS < = 18″ | |
| If NPS > = 20″ | If O< =610 MM | ||
|
Length Through Hub
|
y
|
If NPS < = 4″ | |
| If 5″ < = NPS < = 10″ | |||
| If NPS > = 12″ | If O< =610 MM | ||
|
Bore
|
B
|
WNRF 150# | |
| WNRF 300# | If O< =610 MM | ||
| SOLJ | If O< =610 MM | ||
| SW | If O< =610 MM |
ANSI B16.5 Flanges Applications and Uses
- Stainless Steel Flanges used in Petrochemical Industries
- Stainless Steel Flanges used in Refineries Industries
- Companion Flanges used in Heat Exchangers
- Flanges used in Sugar Industries
- Stainless Steel Lap Joint Flanges used in Chemical Industries
- SS Flanges used in Oil and Gas Industries
- Stainless Steel Flanges used in Pharmaceuticals
- Flanges used in Power Plants