A stainless steel threaded flange is a type of flange that has threads on the inside diameter (ID) of the flange. It is typically used to connect two pipes or fittings together and is screwed onto the end of one of the pipes or fittings. The other end of the pipe or fitting is then screwed into the threaded portion of the flange.
Stainless steel threaded flanges are commonly used in industries such as oil and gas, petrochemical, and chemical processing. They are able to withstand high pressure and temperature applications, making them a reliable choice for connecting pipes and fittings in these industries. Stainless steel threaded flanges are typically made from materials such as ASTM A182 and ASTM A312, which provide excellent corrosion resistance and durability. They can also be ordered in various sizes and pressure classes to meet specific application requirements.
Table of Content：
- Threaded Flange Specifications
- Application of Threaded Flanges
- Threaded Flanges Materials and Grades
- THREADED FLANGE DIMENSIONS IN INCHES
- Threaded Flanges Dimensions Tolerance
- ASME B16.5 Threaded Flange Pressure Ratings
- Threaded Flange Weight Chart
- Threaded Flange Types
- Threaded Flange Price List
Threaded Flange Specifications
| Threaded Flange Standards | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
| ASME B16.5 Threaded Flange Size Chart | 1/2″ (15 NB) to 48″ (1200NB) |
| Threaded Flange Pressure Rating ANSI | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS Threaded Flange |
| Coating | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Threaded Flange |
| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, وغیرہ |
| Most common types of Threaded Flange | Forged / Threaded / Screwed / Plate |
| Connect Type/ Flange Face Type | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove |
| Production technique | · Forged, Heat treated and machined |
| Test | Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
| Equipment | Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc |
| Threaded Flange Uses & application | · Bitumen upgraders.
· Heavy oil refineries. · Nuclear power (mostly seamless). · Petrochemicals and acids. |
Application of Threaded Flanges
- ANSI B16.5 Class 150 Threaded Flanges uses in Industrial Boilers Industry
- ASTM A182 Stainless Steel Threaded Flanges uses in Power Plants Industry
- ASME B16.47 Series A and B Threaded Flanges uses in Nuclear Plants Industry
- Stainless Steel Threaded Flanges uses in Oil & Gas Industry
- Super Duplex Steel Threaded Flanges uses in Refineries Industry
- Industrial Threaded Flanges uses in Ship Building Industry
- Super Duplex Steel Threaded Flange Forged Flanges uses in Heat Exchanger Industry
- Carbon Steel Industrial Threaded Flanges uses in Condensers Industry
- Alloy Steel Industrial Threaded Flanges uses in Paper & Pulp Industry
- Duplex Steel Industrial Threaded Flanges uses in Marine Applications
- Stainless Steel Industrial Threaded Flanges uses in Nuclear Power Industry
- Industrial Threaded Flange / Fittings System uses in Fossil Fuel Power Plants Industry
Threaded Flanges Materials and Grades
| Stainless Steel Threaded Flange |
| ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L |
| Carbon Steel Threaded Flange |
| ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52 |
| Low Temperature Threaded Flange |
| ASTM A350 LF2, LF3, LF6 |
| Alloy Steel Threaded Flange |
| ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91 |
| Duplex & Super Duplex Steel Threaded Flange |
| ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61 |
| Nickel Alloy Threaded Flange |
| UNS 10276 (HASTELLOY C 276), UNS 6625 (INCONEL 625), UNS 6601 (INCONEL 601), UNS 6600 (INCONEL 600), UNS 8825 (INCONEL 825), UNS 8020 (ALLOY 20 / 20 CB 3), UNS 4400 (MONEL 400), UNS 2201 (NICKEL 201), ASTM / ASME SB 336 UNS 2200 (NICKEL 200) |
| High Yield Threaded Flanges |
| ASTM A694 F42, F52, F60, F65, F70 |
THREADED FLANGE DIMENSIONS IN INCHES
Threaded flange dimensions class 150 in inches (ASME B16.5)
| FLANGE NPS |
Inside Diameter |
Outside Diameter |
Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
| 1/2″ | 0.93″ | 3.50″ | 2.38″ | 1.38″ | .063″ | 1.19″ | .62″ | .38″ | .56″ | .62″ | 4 |
| 3/4″ | 1.14″ | 3.88″ | 2.75″ | 1.69″ | .063″ | 1.50″ | .62″ | .44″ | .56″ | .62″ | 4 |
| 1″ | 1.41″ | 4.25″ | 3.12″ | 2.00″ | .063″ | 1.94″ | .69″ | .50″ | .63″ | .62″ | 4 |
| 1-1/4″ | 1.75″ | 4.62″ | 3.50″ | 2.50″ | .063″ | 2.31″ | .81″ | .56″ | .75″ | .62″ | 4 |
| 1-1/2″ | 1.99″ | 5.00″ | 3.88″ | 2.88″ | .063″ | 2.56″ | .88″ | .62″ | .82″ | .62″ | 4 |
| 2″ | 2.50″ | 6.00″ | 4.75″ | 3.62″ | .063″ | 3.06″ | 1.00″ | .69″ | .94″ | .75″ | 4 |
| 2-1/2″ | 3.00″ | 7.00″ | 5.50″ | 4.12″ | .063″ | 3.56″ | 1.12″ | .82″ | 1.06″ | .75″ | 4 |
| 3″ | 3.63″ | 7.50″ | 6.00″ | 5.00″ | .063″ | 4.25″ | 1.19″ | .88″ | 1.13″ | .75″ | 4 |
| 3-1/2″ | 4.13″ | 8.50″ | 7.00″ | 5.50″ | .063″ | 4.81″ | 1.25″ | .88″ | 1.19″ | .75″ | 8 |
| 4″ | 4.63″ | 9.00″ | 7.50″ | 6.19″ | .063″ | 5.31″ | 1.31″ | .88″ | 1.25″ | .75″ | 8 |
| 5″ | 5.69″ | 10.00″ | 8.50″ | 7.31″ | .063″ | 6.44″ | 1.44″ | .88″ | 1.38″ | .88″ | 8 |
| 6″ | 6.75″ | 11.00″ | 9.50″ | 8.50″ | .063″ | 7.56″ | 1.56″ | .94″ | 1.50″ | .88″ | 8 |
| 8″ | 8.75″ | 13.50″ | 11.75″ | 10.62″ | .063″ | 9.69″ | 1.75″ | 1.06″ | 1.69″ | .88″ | 8 |
| 10″ | 10.88″ | 16.00″ | 14.25″ | 12.75″ | .063″ | 12.00″ | 1.94″ | 1.13″ | 1.88″ | 1.00″ | 12 |
| 12″ | 12.94″ | 19.00″ | 17.00″ | 15.00″ | .063″ | 14.38″ | 2.19″ | 1.19″ | 2.13″ | 1.00″ | 12 |
| 14″ | 14.19″ | 21.00″ | 18.75″ | 16.25″ | .063″ | 15.75″ | 2.25″ | 1.32″ | 2.19″ | 1.12″ | 12 |
| 16″ | 16.19″ | 23.50″ | 21.25″ | 18.50″ | .063″ | 18.00″ | 2.50″ | 1.38″ | 2.44″ | 1.12″ | 16 |
| 18″ | 18.19″ | 25.00″ | 22.75″ | 21.00″ | .063″ | 19.88″ | 2.69″ | 1.50″ | 2.63″ | 1.25″ | 16 |
| 20″ | 20.19″ | 27.50″ | 25.00″ | 23.00″ | .063″ | 22.00″ | 2.88″ | 1.63″ | 2.83″ | 1.25″ | 20 |
| 22″ | 22.19″ | 29.50″ | 27.25″ | 25.25″ | .063″ | 24.25″ | 3.13″ | 1.75″ | 3.07″ | 1.38″ | 20 |
| 24″ | 24.19″ | 32.00″ | 29.50″ | 27.25″ | .063″ | 26.12″ | 3.25″ | 1.82″ | 3.19″ | 1.38″ | 20 |
THREADED CLASS 300
Threaded flange dimensions class 300 in inches (ASME B16.5)
| FLANGE NPS |
Inside Diameter |
Outside Diameter |
Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
| 1/2″ | 0.93″ | 3.75″ | 2.62″ | 1.38″ | .063″ | 1.50″ | 0.88″ | 0.50″ | 0.82″ | 0.62″ | 4 |
| 3/4″ | 1.14″ | 4.62″ | 3.25″ | 1.69″ | .063″ | 1.88″ | 1.00″ | .056″ | 0.94″ | 0.75″ | 4 |
| 1″ | 1.41″ | 4.88″ | 3.50″ | 2.00″ | .063″ | 2.12″ | 1.06″ | 0.63″ | 1.00″ | 0.75″ | 4 |
| 1-1/4″ | 1.75″ | 5.25″ | 3.88″ | 2.50″ | .063″ | 2.50″ | 1.06″ | 0.69″ | 1.00″ | 0.75″ | 4 |
| 1-1/2″ | 1.99″ | 6.12″ | 4.50″ | 2.88″ | .063″ | 2.75″ | 1.19″ | 0.75″ | 1.13″ | 0.88″ | 4 |
| 2″ | 2.50″ | 6.50″ | 5.00″ | 3.62″ | .063″ | 3.31″ | 1.31″ | 0.82″ | 1.25″ | 0.75″ | 8 |
| 2-1/2″ | 3.00″ | 7.50″ | 5.88″ | 4.12″ | .063″ | 3.94″ | 1.50″ | 0.94″ | 1.44″ | 0.88″ | 8 |
| 3″ | 3.63″ | 8.25″ | 6.62″ | 5.00″ | .063″ | 4.62″ | 1.69″ | 1.06″ | 1.63″ | 0.88″ | 8 |
| 3-1/2″ | 4.13″ | 9.00″ | 7.25″ | 5.50″ | .063″ | 5.25″ | 1.75″ | 1.13″ | 1.69″ | 0.88″ | 8 |
| 4″ | 4.63″ | 10.00″ | 7.88″ | 6.19″ | .063″ | 5.75″ | 1.88″ | 1.19″ | 1.82″ | 0.88″ | 8 |
| 5″ | 5.69″ | 11.00″ | 9.25″ | 7.31″ | .063″ | 7.00″ | 2.00″ | 1.32″ | 1.94″ | 0.88″ | 8 |
| 6″ | 6.75″ | 12.50″ | 10.62″ | 8.50″ | .063″ | 8.12″ | 2.06″ | 1.38″ | 2.00″ | 0.88″ | 12 |
| 8″ | 8.75″ | 15.00″ | 13.00″ | 10.62″ | .063″ | 10.25″ | 2.44″ | 1.56″ | 2.38″ | 1.00″ | 12 |
| 10″ | 10.88″ | 17.50″ | 15.25″ | 12.75″ | .063″ | 12.62″ | 2.62″ | 1.82″ | 2.56″ | 1.12″ | 16 |
| 12″ | 12.94″ | 20.50″ | 17.75″ | 15.00″ | .063″ | 14.75″ | 2.88″ | 1.94″ | 2.82″ | 1.25″ | 16 |
| 14″ | 14.19″ | 23.00″ | 20.25″ | 16.25″ | .063″ | 16.75″ | 3.00″ | 2.06″ | 2.94″ | 1.25″ | 20 |
| 16″ | 16.19″ | 25.50″ | 22.50″ | 18.50″ | .063″ | 19.00″ | 3.25″ | 2.19″ | 3.19″ | 1.38″ | 20 |
| 18″ | 18.19″ | 28.00″ | 24.75″ | 21.00″ | .063″ | 21.00″ | 3.50″ | 2.32″ | 3.44″ | 1.38″ | 24 |
| 20″ | 20.19″ | 30.50″ | 27.00″ | 23.00″ | .063″ | 23.12″ | 3.75″ | 2.44″ | 3.69″ | 1.38″ | 24 |
| 22″ | 22.19″ | 33.00″ | 29.25″ | 25.25″ | .063″ | 25.25″ | 4.00″ | 2.57″ | 3.94″ | 1.63″ | 24 |
| 24″ | 24.19″ | 36.00″ | 32.00″ | 27.25″ | .063″ | 27.62″ | 4.19″ | 2.69″ | 4.13″ | 1.62″ | 24 |
THREADED CLASS 400
Threaded flange dimensions class 400 in inches (ASME B16.5)
| FLANGE NPS |
Inside Diameter |
Outside Diameter |
Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
| 1/2″ | 0.93″ | 3.75″ | 2.62″ | 0.12″ | .250″ | 1.50″ | 1.13″ | 0.56″ | 0.88″ | 0.62″ | 4 |
| 3/4″ | 1.14″ | 4.62″ | 3.25″ | 0.12″ | .250″ | 1.88″ | 1.25″ | 0.62″ | 1.00″ | 0.75″ | 4 |
| 1″ | 1.41″ | 4.88″ | 3.50″ | 0.12″ | .250″ | 2.12″ | 1.31″ | 0.69″ | 1.06″ | 0.75″ | 4 |
| 1-1/4″ | 1.75″ | 5.25″ | 3.88″ | 0.19″ | .250″ | 2.50″ | 1.37″ | 0.81″ | 1.12″ | 0.75″ | 4 |
| 1-1/2″ | 1.99″ | 6.12″ | 4.50″ | 0.25″ | .250″ | 2.75″ | 1.50″ | 0.88″ | 1.25″ | 0.88″ | 4 |
| 2″ | 2.50″ | 6.50″ | 5.00″ | 0.31″ | .250″ | 3.31″ | 1.69″ | 1.00″ | 1.44″ | 0.75″ | 8 |
| 2-1/2″ | 3.00″ | 7.50″ | 5.88″ | 0.31″ | .250″ | 3.94″ | 1.87″ | 1.12″ | 1.62″ | 0.88″ | 8 |
| 3″ | 3.63″ | 8.25″ | 6.62″ | 0.38″ | .250″ | 4.62″ | 2.06″ | 1.25″ | 1.81″ | 0.88″ | 8 |
| 3-1/2″ | 4.13″ | 9.00″ | 7.25″ | 0.38″ | .250″ | 5.25″ | 2.19″ | 1.38″ | 1.94″ | 1.00″ | 8 |
| 4″ | 4.63″ | 10.00″ | 7.88″ | 0.44″ | .250″ | 5.75″ | 2.25″ | 1.38″ | 2.00″ | 1.00″ | 8 |
| 5″ | 5.69″ | 11.00″ | 9.25″ | 0.44″ | .250″ | 7.00″ | 2.37″ | 1.50″ | 2.12″ | 1.00″ | 8 |
| 6″ | 6.75″ | 12.50″ | 10.62″ | 0.50″ | .250″ | 8.12″ | 2.50″ | 1.62″ | 2.25″ | 1.00″ | 12 |
| 8″ | 8.75″ | 15.00″ | 13.00″ | 0.50″ | .250″ | 10.25″ | 2.94″ | 1.88″ | 2.69″ | 1.12″ | 12 |
| 10″ | 10.88″ | 17.50″ | 15.25″ | 0.50″ | .250″ | 12.62″ | 3.13″ | 2.12″ | 2.88″ | 1.25″ | 16 |
| 12″ | 12.94″ | 20.50″ | 17.75″ | 0.50″ | .250″ | 14.75″ | 3.37″ | 2.25″ | 3.12″ | 1.38″ | 16 |
| 14″ | 14.19″ | 23.00″ | 20.25″ | 0.50″ | .250″ | 16.75″ | 3.56″ | 2.38″ | 3.31″ | 1.38″ | 20 |
| 16″ | 16.19″ | 25.50″ | 22.50″ | 0.50″ | .250″ | 19.00″ | 3.94″ | 2.50″ | 3.69″ | 1.50″ | 20 |
| 18″ | 18.19″ | 28.00″ | 24.75″ | 0.50″ | .250″ | 21.00″ | 4.13″ | 2.62″ | 3.88″ | 1.50″ | 24 |
| 20″ | 20.19″ | 30.50″ | 27.00″ | 0.50″ | .250″ | 23.12″ | 4.25″ | 2.75″ | 4.00″ | 1.62″ | 24 |
| 22″ | 22.19″ | 33.00″ | 29.25″ | 0.50″ | .250″ | 25.25″ | 4.50″ | 2.88″ | 4.25″ | 1.75″ | 24 |
| 24″ | 24.19″ | 36.00″ | 32.00″ | 0.50″ | .250″ | 27.62″ | 4.75″ | 3.00″ | 4.50″ | 1.88″ | 24 |
THREADED CLASS 600
Threaded flange dimensions class 600 in inches (ASME B16.5)
| FLANGE NPS |
Inside Diameter |
Outside Diameter |
Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
| 1/2″ | 0.93″ | 3.75″ | 2.62″ | 1.38″ | .250″ | 1.50″ | 1.13″ | 0.56″ | 0.88″ | 0.62″ | 4 |
| 3/4″ | 1.14″ | 4.62″ | 3.25″ | 1.69″ | .250″ | 1.88″ | 1.25″ | 0.62″ | 1.00″ | 0.75″ | 4 |
| 1″ | 1.41″ | 4.88″ | 3.50″ | 2.00″ | .250″ | 2.12″ | 1.31″ | 0.69″ | 1.06″ | 0.75″ | 4 |
| 1-1/4″ | 1.75″ | 5.25″ | 3.88″ | 2.50″ | .250″ | 2.50″ | 1.37″ | 0.81″ | 1.12″ | 0.75″ | 4 |
| 1-1/2″ | 1.99″ | 6.12″ | 4.50″ | 2.88″ | .250″ | 2.75″ | 1.50″ | 0.88″ | 1.25″ | 0.88″ | 4 |
| 2″ | 2.50″ | 6.50″ | 5.00″ | 3.62″ | .250″ | 3.31″ | 1.69″ | 1.00″ | 1.44″ | 0.75″ | 8 |
| 2-1/2″ | 3.00″ | 7.50″ | 5.88″ | 4.12″ | .250″ | 3.94″ | 1.87″ | 1.12″ | 1.62″ | 0.88″ | 8 |
THREADED CLASS 900
Threaded flange dimensions class 900 in inches (ASME B16.5)
| FLANGE NPS |
Inside Diameter |
Outside Diameter |
Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
| 1/2″ | 0.93″ | 4.75″ | 3.25″ | 1.38″ | .250″ | 1.50″ | 1.50″ | 0.88″ | 1.25″ | 0.88″ | 4 |
| 3/4″ | 1.14″ | 5.13″ | 3.50″ | 1.69″ | .250″ | 1.75″ | 1.63″ | 1.00″ | 1.38″ | 0.88″ | 4 |
| 1″ | 1.41″ | 5.88″ | 4.00″ | 2.00″ | .250″ | 2.06″ | 1.88″ | 1.13″ | 1.63″ | 1.00″ | 4 |
| 1-1/4″ | 1.75″ | 6.25″ | 4.38″ | 2.50″ | .250″ | 2.50″ | 1.88″ | 1.13″ | 1.63″ | 1.00″ | 4 |
| 1-1/2″ | 1.99″ | 7.00″ | 4.88″ | 2.88″ | .250″ | 2.75″ | 2.00″ | 1.25″ | 1.75″ | 1.13″ | 4 |
| 2″ | 2.50″ | 8.50″ | 6.50″ | 3.63″ | .250″ | 4.13″ | 2.50″ | 1.50″ | 2.25″ | 1.00″ | 8 |
| 2-1/2″ | 3.00″ | 9.63″ | 7.50″ | 4.13″ | .250″ | 4.88″ | 2.75″ | 1.63″ | 2.50″ | 1.13″ | 8 |
| 3″ | 3.63″ | 9.50″ | 7.50″ | 5.00″ | .250″ | 5.00″ | 2.38″ | 1.50″ | 2.13″ | 1.00″ | 8 |
| 4″ | 4.63″ | 11.50″ | 9.25″ | 6.19″ | .250″ | 6.25″ | 3.00″ | 1.75″ | 2.75″ | 1.25″ | 8 |
| 5″ | 5.69″ | 13.75″ | 11.00″ | 7.31″ | .250″ | 7.50″ | 3.38″ | 3.00″ | 3.13″ | 1.38″ | 8 |
| 6″ | 6.75″ | 15.00″ | 12.50″ | 8.50″ | .250″ | 9.25″ | 3.63″ | 2.19″ | 3.38″ | 1.25″ | 12 |
| 8″ | 8.75″ | 18.50″ | 15.50″ | 10.63″ | .250″ | 11.75″ | 4.25″ | 2.50″ | 4.00″ | 1.50″ | 12 |
| 10″ | 10.88″ | 21.50″ | 18.50″ | 12.75″ | .250″ | 14.50″ | 4.50″ | 2.75″ | 4.25″ | 1.50″ | 16 |
| 12″ | 12.94″ | 24.00″ | 21.00″ | 15.00″ | .250″ | 16.50″ | 4.88″ | 3.13″ | 4.63″ | 1.50″ | 20 |
| 14″ | 14.19″ | 25.25″ | 22.00″ | 16.25″ | .250″ | 17.75″ | 5.38″ | 3.38″ | 5.13″ | 1.63″ | 20 |
| 16″ | 16.19″ | 27.75″ | 24.25″ | 18.50″ | .250″ | 20.00″ | 5.50″ | 3.50″ | 5.25″ | 1.75″ | 20 |
| 18″ | 18.19″ | 31.00″ | 27.00″ | 21.00″ | .250″ | 22.25″ | 6.25″ | 4.00″ | 6.00″ | 2.00″ | 20 |
| 20″ | 20.19″ | 33.75″ | 29.50″ | 23.00″ | .250″ | 24.50″ | 6.50″ | 4.25″ | 6.25″ | 2.13″ | 20 |
| 24″ | 24.19″ | 41.00″ | 35.50″ | 27.25″ | .250″ | 29.50″ | 8.25″ | 5.50″ | 8.00″ | 2.63″ | 20 |
THREADED CLASS 1500
Threaded flange dimensions class 1500 in inches (ASME B16.5)
| FLANGE NPS |
Inside Diameter |
Outside Diameter |
Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
| 1/2″ | 0.93″ | 4.75″ | 3.25″ | 1.38″ | .250″ | 1.50″ | 1.50″ | 0.88″ | 1.25″ | 0.88″ | 4 |
| 3/4″ | 1.14″ | 5.13″ | 3.50″ | 1.69″ | .250″ | 1.75″ | 1.63″ | 1.00″ | 1.38″ | 0.88″ | 4 |
| 1″ | 1.41″ | 5.88″ | 4.00″ | 2.00″ | .250″ | 2.06″ | 1.88″ | 1.13″ | 1.63″ | 1.00″ | 4 |
| 1-1/4″ | 1.75″ | 6.25″ | 4.38″ | 2.50″ | .250″ | 2.50″ | 1.88″ | 1.13″ | 1.63″ | 1.00″ | 4 |
| 1-1/2″ | 1.99″ | 7.00″ | 4.88″ | 2.88″ | .250″ | 2.75″ | 2.00″ | 1.25″ | 1.75″ | 1.13″ | 4 |
| 2″ | 2.50″ | 8.50″ | 6.50″ | 3.63″ | .250″ | 4.13″ | 2.50″ | 1.50″ | 2.25″ | 1.00″ | 8 |
| 2-1/2″ | 3.00″ | 9.63″ | 7.50″ | 4.13″ | .250″ | 4.88″ | 2.75″ | 1.63″ | 2.50″ | 1.13″ | 8 |
THREADED CLASS 2500
Threaded flange dimensions class 2500 in inches (ASME B16.5)
| FLANGE NPS |
Inside Diameter |
Outside Diameter |
Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
| 1/2″ | 0.93″ | 5.25″ | 3.50″ | 1.38″ | .250″ | 1.69″ | 1.81″ | 1.19″ | 1.56″ | 0.88″ | 4 |
| 3/4″ | 1.14″ | 5.50″ | 3.75″ | 1.69″ | .250″ | 2.00″ | 1.94″ | 1.25″ | 1.69″ | 0.88″ | 4 |
| 1″ | 1.41″ | 6.25″ | 4.25″ | 2.00″ | .250″ | 2.25″ | 2.13″ | 1.38″ | 1.88″ | 1.00″ | 4 |
| 1-1/4″ | 1.75″ | 7.25″ | 5.13″ | 2.50″ | .250″ | 2.88″ | 2.31″ | 1.50″ | 2.06″ | 1.13″ | 4 |
| 1-1/2″ | 1.99″ | 8.00″ | 5.75″ | 2.88″ | .250″ | 3.13″ | 2.63″ | 1.75″ | 2.38″ | 1.25″ | 4 |
| 2″ | 2.50″ | 9.25″ | 6.75″ | 3.63″ | .250″ | 3.75″ | 3.00″ | 2.00″ | 2.75″ | 1.13″ | 8 |
| 2-1/2″ | 3.00″ | 10.50″ | 7.75″ | 4.13″ | .250″ | 4.50″ | 3.38″ | 2.25″ | 3.13″ | 1.25″ | 8 |
ASME B16.5 Threaded Flange Pressure Ratings
Maximum allowable non-shock pressure (psig) and temperature ratings for threaded flange ansi b16.5 and flanged fittings according the American National Standard ANSI B16.5 – 1988.
| Maximum Allowable non-shock Pressure (psig) | |||||||
| Temperature (oF) |
Pressure Class (lb) | ||||||
| 150 | 300 | 400 | 600 | 900 | 1500 | 2500 | |
| Hydrostatic Test Pressure (psig) | |||||||
| 450 | 1125 | 1500 | 2225 | 3350 | 5575 | 9275 | |
| -20 to 100 | 290 | 750 | 1000 | 1500 | 2250 | 3750 | 6250 |
| 200 | 260 | 750 | 1000 | 1500 | 2250 | 3750 | 6250 |
| 300 | 230 | 730 | 970 | 1455 | 2185 | 3640 | 6070 |
| 400 | 200 | 705 | 940 | 1405 | 2110 | 3520 | 5865 |
| 500 | 170 | 665 | 885 | 1330 | 1995 | 3325 | 5540 |
| 600 | 140 | 605 | 805 | 1210 | 1815 | 3025 | 5040 |
| 650 | 125 | 590 | 785 | 1175 | 1765 | 2940 | 4905 |
| 700 | 110 | 555 | 740 | 1110 | 1665 | 2775 | 4630 |
| 750 | 95 | 505 | 675 | 1015 | 1520 | 2535 | 4230 |
| 800 | 80 | 410 | 550 | 825 | 1235 | 2055 | 3430 |
| 850 | 65 | 320 | 425 | 640 | 955 | 1595 | 2655 |
| 900 | 50 | 225 | 295 | 445 | 670 | 1115 | 1855 |
| 950 | 35 | 135 | 185 | 275 | 410 | 685 | 1145 |
| 1000 | 20 | 85 | 115 | 170 | 255 | 430 | 715 |
Threaded Flanges Dimensions Tolerance
| utside Diameter ≤ 24 = 1.6 mm | > 24 = ± 3.2 mm |
Inside Diameter Within Limits on Boring Gauge |
| Diameter of Contact Face 1.6 mm Raised Face = ± 0.8 mm 6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm |
Drilling Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm Eccentricity of Bolt Circle with Respect to Facing ≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max. |
| Outside Diameter of Hub ≤ 12 = + 2.4 mm / – 1.6 mm | ≥ 14 = ± 3.2 mm |
Diameter of Counterbore Same as forInside Diameter |
| Thickness ≤ 18 = + 3.2 mm / – 0 | ≥ 20 = + 4.8 mm / – 0 |
Length thru Hub ≤ 18 = + 3.2 mm / – 0.8 mm | ≥ 20 = + 4.8 mm / – 1.6 mm |
Stainless Steel Threaded Flange Weight Chart
15mm (1/2″) Stainless Steel Threaded Flange Weight Chart
| Pipe Normal Diam. | O.D. Flange | Thk. Of Flange Min | Diam. of Hub |
Diameter of Raised Face | Length Hub.Y | Thread Length | Diam. of Bolt Circle |
Diam. of Bolt Holes |
Number of Bolts |
Diam. of Bolts (inch) |
KG | LB | |
| inch | dn | O | C | X | G | Y | T | BC | BH | BN | BD | ||
| 1/2″ | 15 | 89.00 | 11.20 | 30.20 | 35.10 | 15.70 | 15.70 | 60.50 | 15.80 | 4 | 1/2″ | 0.4 | 0.9 |
| 3/4″ | 20 | 98.50 | 12.70 | 38.10 | 42.90 | 15.70 | 15.70 | 69.90 | 15.80 | 4 | 1/2″ | 0.7 | 1.5 |
| 1″ | 25 | 108.00 | 14.20 | 49.30 | 50.80 | 17.50 | 17.50 | 79.30 | 15.80 | 4 | 1/2″ | 0.8 | 1.8 |
| 1-1/4″ | 32 | 117.50 | 15.70 | 58.70 | 63.50 | 20.60 | 20.60 | 88.90 | 15.80 | 4 | 1/2″ | 1.2 | 2.6 |
| 1-1/2″ | 40 | 127.00 | 17.50 | 65.00 | 73.20 | 22.40 | 22.40 | 98.60 | 15.80 | 4 | 1/2″ | 1.5 | 3.3 |
| 2″ | 50 | 152.50 | 19.10 | 77.70 | 91.90 | 25.40 | 25.40 | 120.70 | 19.10 | 4 | 5/8″ | 2.3 | 5.1 |
| 2-1/2″ | 65 | 178.00 | 22.40 | 90.40 | 104.60 | 28.40 | 28.40 | 139.70 | 19.10 | 4 | 5/8″ | 3.7 | 8.1 |
| 3″ | 80 | 190.50 | 23.90 | 108.00 | 127.00 | 30.20 | 30.20 | 152.40 | 19.10 | 4 | 5/8″ | 4.1 | 9 |
| 3-1/2″ | 90 | 216.00 | 23.90 | 122.20 | 139.70 | 31.80 | 31.80 | 177.80 | 19.10 | 8 | 5/8″ | 5.1 | 11.2 |
| 4″ | 100 | 228.50 | 23.90 | 134.90 | 157.20 | 33.30 | 33.30 | 190.50 | 19.10 | 8 | 5/8″ | 5.9 | 13 |
| 5″ | 125 | 254.00 | 23.90 | 163.60 | 185.70 | 36.60 | 36.60 | 215.90 | 22.40 | 8 | 3/4″ | 7 | 15.4 |
| 6″ | 150 | 279.50 | 25.40 | 192.00 | 215.90 | 39.60 | 39.60 | 241.30 | 22.40 | 8 | 3/4″ | 8.4 | 18.5 |
| 8″ | 200 | 343.00 | 28.40 | 246.10 | 269.70 | 44.50 | 44.50 | 298.50 | 22.40 | 8 | 3/4″ | 13 | 28.6 |
| 10″ | 250 | 406.50 | 30.20 | 304.80 | 323.90 | 49.30 | 49.30 | 362.00 | 25.40 | 12 | 7/8″ | 18 | 39.5 |
| 12″ | 300 | 482.50 | 31.80 | 365.30 | 381.00 | 55.60 | 55.60 | 431.80 | 25.40 | 12 | 7/8″ | 29 | 64 |
| 14″ | 350 | 533.50 | 35.10 | 400.10 | 412.80 | 57.20 | 57.20 | 476.30 | 28.50 | 12 | 1″ | 39 | 86 |
| 16″ | 400 | 597.00 | 36.60 | 457.20 | 469.90 | 63.50 | 63.50 | 539.80 | 28.50 | 16 | 1″ | 47 | 103 |
| 18″ | 450 | 635.00 | 39.60 | 505.00 | 533.40 | 68.30 | 68.30 | 577.90 | 31.80 | 16 | 1 1/8″ | 57 | 126 |
| 20″ | 500 | 698.50 | 42.90 | 558.80 | 584.20 | 73.20 | 73.20 | 635.00 | 31.80 | 20 | 1 1/8″ | 76 | 167 |
| 24″ | 600 | 813.00 | 47.80 | 663.40 | 692.20 | 82.60 | 82.60 | 749.30 | 35.10 | 20 | 1 1/4″ | 97 | 214 |
Threaded Flange Types
| ANSI B16.5 class 150 Screwed Flange | Threaded Flange Flat Face |
| Threaded Flange Raised Face | Threaded Slip On Flanges |
| ANSI 150 Threaded Flange | Threaded Flange Dimensions |
| Galvanised Threaded Flange | 4″ Threaded Flanges |
| Threaded Flange | Threaded Pipe Flanges |
| Threaded Hub Flange | ASME B16.5 Screwed Flanges |
| ASME B16.47 Series A and B Screwed Flanges | Threaded Flange EN 1092-1 |
| Threaded Orifice Flange | Threaded Floor Flange |
| Threaded Forged Flange | Threaded Exhaust Flange |
| Threaded Plate Flanges | ANSI B16.5 Class 150 Threaded Flanges |
| Threaded Flange DIN25 | ASME B16.47 Series A and B Screwed Flanges Exporter |
| ANSI B16.5 Threaded Flanges | Screwed Flanges |
Threaded Flange Price List
| Threaded Flange type | Threaded Flange Price in USD |
| Stainless Steel Threaded Flange | USD $ 44.42 /Kg |
| Carbon steel Threaded Flange | USD $ 33.56 /Kg |
| Alloy steel Threaded Flange | USD $ 23.08 /Kg |
| ANSI b16 5 Threaded Flange | USD $ 25.22 /Kg |
| ASME b16.47 Threaded Flange | USD $ 19.28 /Kg |
