ASME/ANSI B16.5 Blind Flanges
Our company provides ASME/ANSI B16.5 Blind Flanges.
ASME B16.5 Blind Flanges cover Steel Pipe Flanges and Flanged Fittings from NPS 1/2 through NPS 24 Metric/Inch in pressure class 150 to class 2500.
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ASME/ANSI B16.5 Blind Flanges
ASME/ANSI B16.5 Class 150 Blind Flanges
(a)All dimensions are in inches.
(b)These flanges will be furnished with a 1/16″ raised face unless otherwise specified. For more alternate flange facings, please click here!
| Nominal Pipe Size | Outside Diameter (O) | Bolt Circle (W) | Raised Face Diameter (R) | Number of Holes | Diameter of Holes | Thickness (T) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|
| 1/2 | 3.50 | 2.38 | 1.38 | 4 | 0.62 | 0.38 | 1 |
| 3/4 | 3.88 | 2.75 | 1.69 | 4 | 0.62 | 0.44 | 2 |
| 1 | 4.25 | 3.12 | 2.00 | 4 | 0.62 | 0.50 | 2 |
| 1 1/4 | 4.62 | 3.50 | 2.50 | 4 | 0.62 | 0.56 | 3 |
| 1 1/2 | 5.00 | 3.88 | 2.88 | 4 | 0.62 | 0.62 | 4 |
| 2 | 6.00 | 4.75 | 3.62 | 4 | 0.75 | 0.69 | 5 |
| 2 1/2 | 7.00 | 5.50 | 4.12 | 4 | 0.75 | 0.81 | 7 |
| 3 | 7.50 | 6.00 | 5.00 | 4 | 0.75 | 0.88 | 9 |
| 3 1/2 | 8.50 | 7.00 | 5.50 | 8 | 0.75 | 0.88 | 13 |
| 4 | 9.00 | 7.50 | 6.19 | 8 | 0.75 | 0.88 | 17 |
| 5 | 10.00 | 8.50 | 7.31 | 8 | 0.88 | 0.88 | 20 |
| 6 | 11.00 | 9.50 | 8.50 | 8 | 0.88 | 0.94 | 26 |
| 8 | 13.50 | 11.75 | 10.62 | 8 | 0.88 | 1.06 | 45 |
| 10 | 16.00 | 14.25 | 12.75 | 12 | 1.00 | 1.12 | 70 |
| 12 | 19.00 | 17.00 | 15.00 | 12 | 1.00 | 1.19 | 110 |
| 14 | 21.00 | 18.75 | 16.25 | 12 | 1.12 | 1.31 | 140 |
| 16 | 23.50 | 21.25 | 18.50 | 16 | 1.12 | 1.38 | 180 |
| 18 | 25.00 | 22.75 | 21.00 | 16 | 1.25 | 1.50 | 220 |
| 20 | 27.50 | 25.00 | 23.00 | 20 | 1.25 | 1.62 | 285 |
| 22 | 29.50 | 27.25 | 25.25 | 20 | 1.38 | 1.75 | 355 |
| 24 | 32.00 | 29.50 | 27.25 | 20 | 1.38 | 1.81 | 430 |
ASME/ANSI B16.5 Class 300 Blind Flanges
(a) All dimensions are in inches.
(b) These flanges will be furnished with a 1/16″ raised face unless otherwise specified, For more alternate flange facings, please click here!
| Nominal Pipe Size | Outside Diameter (O) | Bolt Circle (W) | Raised Face Diameter (R) | Number of Holes | Diameter of Holes | Thickness (T) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|
| 1/2 | 3.75 | 2.62 | 1.38 | 4 | 0.63 | 0.50 | 2 |
| 3/4 | 4.62 | 3.25 | 1.69 | 4 | 0.75 | 0.56 | 3 |
| 1 | 4.88 | 3.50 | 2.00 | 4 | 0.75 | 0.62 | 3 |
| 1 1/4 | 5.25 | 3.88 | 2.50 | 4 | 0.75 | 0.69 | 4 |
| 1 1/2 | 6.12 | 4.50 | 2.88 | 4 | 0.88 | 0.75 | 6 |
| 2 | 6.50 | 5.00 | 3.62 | 8 | 0.75 | 0.81 | 8 |
| 2 1/2 | 7.50 | 5.88 | 4.12 | 8 | 0.88 | 0.94 | 12 |
| 3 | 8.25 | 6.62 | 5.00 | 8 | 0.88 | 1.06 | 16 |
| 3 1/2 | 9.00 | 7.25 | 5.50 | 8 | 0.88 | 1.12 | 21 |
| 4 | 10.00 | 7.88 | 6.19 | 8 | 0.88 | 1.19 | 27 |
| 5 | 11.00 | 9.25 | 7.31 | 8 | 0.88 | 1.31 | 35 |
| 6 | 12.50 | 10.62 | 8.50 | 12 | 0.88 | 1.38 | 50 |
| 8 | 15.00 | 13.00 | 10.62 | 12 | 1.00 | 1.56 | 81 |
| 10 | 17.50 | 15.25 | 12.75 | 16 | 1.13 | 1.81 | 124 |
| 12 | 20.50 | 17.75 | 15.00 | 16 | 1.25 | 1.94 | 185 |
| 14 | 23.00 | 20.25 | 16.25 | 20 | 1.25 | 2.06 | 250 |
| 16 | 25.50 | 22.50 | 18.50 | 20 | 1.38 | 2.19 | 295 |
| 18 | 28.00 | 24.75 | 21.00 | 24 | 1.38 | 2.31 | 395 |
| 20 | 30.50 | 27.00 | 23.00 | 24 | 1.38 | 2.44 | 505 |
| 22 | 33.00 | 29.25 | 25.25 | 24 | 1.63 | 2.56 | 640 |
| 24 | 36.00 | 32.00 | 27.25 | 24 | 1.63 | 2.69 | 790 |
ASME/ANSI B16.5 Class 400 Blind Flanges
(a)All dimensions are in inches.
(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified. For more alternate flange facings, please click here!
| Nominal Pipe Size | Outside Diameter (O) | Bolt Circle (W) | Raised Face Diameter (R) | Number of Holes | Diameter of Holes | Thickness (T) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|
| 1/2 | 3.75 | 2.62 | 1.38 | 4 | 0.63 | 0.56 | 2 |
| 3/4 | 4.62 | 3.25 | 1.69 | 4 | 0.75 | 0.62 | 3 |
| 1 | 4.88 | 3.50 | 2.00 | 4 | 0.75 | 0.69 | 4 |
| 1 1/4 | 5.25 | 3.88 | 2.50 | 4 | 0.75 | 0.81 | 5 |
| 1 1/2 | 6.12 | 4.50 | 2.88 | 4 | 0.88 | 0.88 | 8 |
| 2 | 6.50 | 5.00 | 3.62 | 8 | 0.75 | 1.00 | 10 |
| 2 1/2 | 7.50 | 5.88 | 4.12 | 8 | 0.88 | 1.12 | 15 |
| 3 | 8.25 | 6.62 | 5.00 | 8 | 0.88 | 1.25 | 20 |
| 3 1/2 | 9.00 | 7.25 | 5.50 | 8 | 1.00 | 1.38 | 29 |
| 4 | 10.00 | 7.88 | 6.19 | 8 | 1.00 | 1.38 | 33 |
| 5 | 11.00 | 9.25 | 7.31 | 8 | 1.00 | 1.50 | 44 |
| 6 | 12.50 | 10.62 | 8.50 | 12 | 1.00 | 1.62 | 61 |
| 8 | 15.00 | 13.00 | 10.62 | 12 | 1.13 | 1.88 | 100 |
| 10 | 17.50 | 15.25 | 12.75 | 16 | 1.25 | 2.12 | 155 |
| 12 | 20.50 | 17.75 | 15.00 | 16 | 1.38 | 2.25 | 225 |
| 14 | 23.00 | 20.25 | 16.25 | 20 | 1.38 | 2.38 | 290 |
| 16 | 25.50 | 22.50 | 18.50 | 20 | 1.50 | 2.50 | 370 |
| 18 | 28.00 | 24.75 | 21.00 | 24 | 1.50 | 2.62 | 455 |
| 20 | 30.50 | 27.00 | 23.00 | 24 | 1.63 | 2.75 | 587 |
| 22 | 33.00 | 29.25 | 25.25 | 24 | 1.75 | 2.88 | 720 |
| 24 | 36.00 | 32.00 | 27.25 | 24 | 1.88 | 3.00 | 890 |
ASME/ANSI B16.5 Class 600 Blind Flanges
(a)All dimensions are in inches.
(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified. For more alternate flange facings, please click here!
| Nominal Pipe Size | Outside Diameter (O) | Bolt Circle (W) | Raised Face Diameter (R) | Number of Holes | Diameter of Holes | Thickness (T) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|
| 1/2 | 3.75 | 2.62 | 1.38 | 4 | 0.63 | 0.56 | 2 |
| 3/4 | 4.62 | 3.25 | 1.69 | 4 | 0.75 | 0.62 | 3 |
| 1 | 4.88 | 3.50 | 2.00 | 4 | 0.75 | 0.69 | 4 |
| 1 1/4 | 5.25 | 3.88 | 2.50 | 4 | 0.75 | 0.81 | 5 |
| 1 1/2 | 6.12 | 4.50 | 2.88 | 4 | 0.88 | 0.88 | 8 |
| 2 | 6.50 | 5.00 | 3.62 | 8 | 0.75 | 1.00 | 10 |
| 2 1/2 | 7.50 | 5.88 | 4.12 | 8 | 0.88 | 1.12 | 15 |
| 3 | 8.25 | 6.62 | 5.00 | 8 | 0.88 | 1.25 | 20 |
| 3 1/2 | 9.00 | 7.25 | 5.50 | 8 | 1.00 | 1.38 | 29 |
| 4 | 10.75 | 8.50 | 6.19 | 8 | 1.00 | 1.50 | 41 |
| 5 | 13.00 | 10.50 | 7.31 | 8 | 1.13 | 1.75 | 68 |
| 6 | 14.00 | 11.50 | 8.50 | 12 | 1.13 | 1.88 | 86 |
| 8 | 16.50 | 13.75 | 10.62 | 12 | 1.25 | 2.19 | 140 |
| 10 | 20.00 | 17.00 | 12.75 | 16 | 1.38 | 2.50 | 230 |
| 12 | 22.00 | 19.25 | 15.00 | 20 | 1.38 | 2.62 | 295 |
| 14 | 23.75 | 20.75 | 16.25 | 20 | 1.50 | 2.75 | 355 |
| 16 | 27.00 | 23.75 | 18.50 | 20 | 1.63 | 3.00 | 495 |
| 18 | 29.25 | 25.75 | 21.00 | 20 | 1.75 | 3.25 | 630 |
| 20 | 32.00 | 28.50 | 23.00 | 24 | 1.75 | 3.50 | 810 |
| 22 | 34.25 | 30.62 | 25.25 | 24 | 1.88 | 3.75 | 1000 |
| 24 | 37.00 | 33.00 | 27.25 | 24 | 2.00 | 4.00 | 1250 |
ASME/ANSI B16.5 Class 900 Blind Flanges
(a)All dimensions are in inches.
(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified. For more alternate flange facings, please click here!
| Nominal Pipe Size | Outside Diameter (O) | Bolt Circle (W) | Raised Face Diameter (R) | Number of Holes | Diameter of Holes | Thickness (T) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|
| 1/2 | 4.75 | 3.25 | 1.38 | 4 | 0.88 | 0.88 | 4 |
| 3/4 | 5.12 | 3.50 | 1.69 | 4 | 0.88 | 1.00 | 6 |
| 1 | 5.88 | 4.00 | 2.00 | 4 | 1.00 | 1.12 | 8 |
| 1 1/4 | 6.25 | 4.38 | 2.50 | 4 | 1.00 | 1.12 | 9 |
| 1 1/2 | 7.00 | 4.88 | 2.88 | 4 | 1.13 | 1.25 | 13 |
| 2 | 8.50 | 6.50 | 3.62 | 8 | 1.00 | 1.50 | 25 |
| 2 1/2 | 9.62 | 7.50 | 4.12 | 8 | 1.13 | 1.62 | 35 |
| 3 | 9.50 | 7.50 | 5.00 | 8 | 1.00 | 1.50 | 29 |
| 4 | 11.50 | 9.25 | 6.19 | 8 | 1.25 | 1.75 | 54 |
| 5 | 13.75 | 11.00 | 7.31 | 8 | 1.38 | 2.00 | 87 |
| 6 | 15.00 | 12.50 | 8.50 | 12 | 1.25 | 2.19 | 115 |
| 8 | 18.50 | 15.50 | 10.62 | 12 | 1.50 | 2.50 | 200 |
| 10 | 21.50 | 18.50 | 12.75 | 16 | 1.50 | 2.75 | 290 |
| 12 | 24.00 | 21.00 | 15.00 | 20 | 1.50 | 3.12 | 415 |
| 14 | 25.25 | 22.00 | 16.25 | 20 | 1.63 | 3.38 | 520 |
| 16 | 27.75 | 24.25 | 18.50 | 20 | 1.75 | 3.50 | 600 |
| 18 | 31.00 | 27.00 | 21.00 | 20 | 2.00 | 4.00 | 850 |
| 20 | 33.75 | 29.50 | 23.00 | 20 | 2.13 | 4.25 | 1075 |
| 24 | 41.00 | 35.50 | 27.25 | 20 | 2.63 | 5.50 | 2025 |
ASME/ANSI B16.5 Class 1500 Blind Flanges
(a)All dimensions are in inches.
(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified. For more alternate flange facings, please click here!
| Nominal Pipe Size | Outside Diameter (O) | Bolt Circle (W) | Raised Face Diameter (R) | Number of Holes | Diameter of Holes | Thickness (T) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|
| 1/2 | 4.75 | 3.25 | 1.38 | 4 | 0.88 | 0.88 | 4 |
| 3/4 | 5.12 | 3.50 | 1.69 | 4 | 0.88 | 1.00 | 6 |
| 1 | 5.88 | 4.00 | 2.00 | 4 | 1.00 | 1.12 | 8 |
| 1 1/4 | 6.25 | 4.38 | 2.50 | 4 | 1.00 | 1.12 | 9 |
| 1 1/2 | 7.00 | 4.88 | 2.88 | 4 | 1.13 | 1.25 | 13 |
| 2 | 8.50 | 6.50 | 3.62 | 8 | 1.00 | 1.50 | 25 |
| 2 1/2 | 9.62 | 7.50 | 4.12 | 8 | 1.13 | 1.62 | 35 |
| 3 | 10.50 | 8.00 | 5.00 | 8 | 1.25 | 1.88 | 48 |
| 4 | 12.25 | 9.50 | 6.19 | 8 | 1.38 | 2.12 | 73 |
| 5 | 14.75 | 11.50 | 7.31 | 8 | 1.63 | 2.88 | 140 |
| 6 | 15.50 | 12.50 | 8.50 | 12 | 1.50 | 3.25 | 160 |
| 8 | 19.00 | 15.50 | 10.62 | 12 | 1.75 | 3.62 | 300 |
| 10 | 23.00 | 19.00 | 12.75 | 12 | 2.00 | 4.25 | 510 |
| 12 | 26.50 | 22.50 | 15.00 | 16 | 2.13 | 4.88 | 690 |
| 14 | 29.50 | 25.00 | 16.25 | 16 | 2.38 | 5.25 | 975 |
| 16 | 32.50 | 27.75 | 18.50 | 16 | 2.63 | 5.75 | 1300 |
| 18 | 36.00 | 30.50 | 21.00 | 16 | 2.88 | 6.38 | 1750 |
| 20 | 38.75 | 32.75 | 23.00 | 16 | 3.13 | 7.00 | 2225 |
| 24 | 46.00 | 39.00 | 27.25 | 16 | 3.63 | 8.00 | 3625 |
ASME/ANSI B16.5 Class 2500 Blind Flanges
(a)All dimensions are in inches.
(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified. For more alternate flange facings, please click here!
| Nominal Pipe Size | Outside Diameter (O) | Bolt Circle (W) | Raised Face Diameter (R) | Number of Holes | Diameter of Holes | Thickness (T) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|
| 1/2 | 5.25 | 3.50 | 1.38 | 4 | 0.88 | 1.19 | 7 |
| 3/4 | 5.50 | 3.75 | 1.69 | 4 | 0.88 | 1.25 | 8 |
| 1 | 6.25 | 4.25 | 2.00 | 4 | 1.00 | 1.38 | 11 |
| 1 1/4 | 7.25 | 5.12 | 2.50 | 4 | 1.13 | 1.50 | 17 |
| 1 1/2 | 8.00 | 5.75 | 2.88 | 4 | 1.25 | 1.75 | 23 |
| 2 | 9.25 | 6.75 | 3.62 | 8 | 1.13 | 2.00 | 39 |
| 2 1/2 | 10.50 | 7.75 | 4.12 | 8 | 1.25 | 2.25 | 56 |
| 3 | 12.00 | 9.00 | 5.00 | 8 | 1.38 | 2.62 | 86 |
| 4 | 14.00 | 10.75 | 6.19 | 8 | 1.63 | 3.00 | 135 |
| 5 | 16.50 | 12.75 | 7.31 | 8 | 1.88 | 3.62 | 225 |
| 6 | 19.00 | 14.50 | 8.50 | 8 | 2.13 | 4.25 | 345 |
| 8 | 21.75 | 17.25 | 10.62 | 12 | 2.13 | 5.00 | 530 |
| 10 | 26.50 | 21.25 | 12.75 | 12 | 2.63 | 6.50 | 1025 |
| 12 | 30.00 | 24.38 | 15.00 | 12 | 2.88 | 7.25 | 1300 |
Here is a table outlining the specifications and characteristics of ASME/ANSI B16.5 Blind Flanges:
| Specification/Feature | Description |
|---|---|
| Standard | ASME/ANSI B16.5 Blind Flange. |
| Type | Blind Flange – A type of flange with no bore (opening) in the center, used to block off a pipe or vessel opening. |
| Pressure Ratings | Available in different pressure classes, such as 150, 300, 600, 900, 1500, 2500, etc., to accommodate varying pressure requirements. |
| Size Range | Typically available in sizes ranging from 1/2 inches to 48 inches or larger, suitable for various pipe and equipment sizes. |
| Materials | ASME/ANSI B16.5 Blind Flanges can be manufactured from materials like carbon steel, stainless steel, alloy steel, and more, chosen based on application requirements. |
| Facing Types | Common facing types include Raised Face (RF), Flat Face (FF), Ring-Type Joint (RTJ), and Male and Female (M&F) facings, impacting sealing methods. |
| Bolt Hole Quantity and Diameter | The number and diameter of bolt holes vary with flange size and pressure rating, facilitating flange connection. |
| Connection Method | ASME/ANSI B16.5 Blind Flanges are used to seal off the end of a pipe or vessel and do not have a connection for pipes. |
| Application Areas | Blind Flanges are widely used in industries such as oil and gas, petrochemical, water treatment, and more for sealing off pipe or vessel openings. |
| Standards and Codes | ASME/ANSI B16.5 Blind Flanges adhere to standards set by the American National Standards Institute (ANSI) and nominal pipe size (NPS) standards, such as ANSI B16.5. |
| Seal Types | Blind Flanges commonly use gaskets or O-rings for sealing, with the choice of seal type depending on the application and pressure rating. |
| Accessories and Attachments | Some applications may require additional components such as flange gaskets, bolts, nuts, flange covers, or flange cover gaskets. |
| Inspection and Testing | ASME/ANSI B16.5 Blind Flanges typically undergo a series of inspections and tests to ensure they meet quality and performance requirements, in compliance with standards. |
| Marking and Certification | Blind Flanges should be marked with the manufacturer’s identification, size, class, material, and other relevant information. Some flanges may require specific certifications such as PED or ASME. |
| Installation and Maintenance | Proper installation and regular maintenance of Blind Flanges, including flange face cleaning and seal replacement, are crucial for system integrity and performance. |
| Application Standards | In specific industries and applications, there may be industry-specific Blind Flange application standards that need to be adhered to for safety and performance. |
This table provides a comprehensive overview of ASME/ANSI B16.5 Blind Flanges, covering key specifications, characteristics, and additional considerations. Specific details and requirements may vary based on the chosen flange size, pressure rating, and material.
The blind flange is used to seal off the end of a pipe or valve. It is typically used in applications where future expansion or maintenance may be required. Blind flanges can also be used in high-pressure applications as a sealing element to stop the flow of fluid.
ASME/ANSI B16.5 Blind Flanges are a type of flange that is designed to seal the end of a pipe or valve. They are also known as blank flanges because they have no bore or inner diameter. Blind flanges are typically used to terminate a piping system or to create a temporary seal for maintenance purposes.
The ASME/ANSI B16.5 Blind Flange is a standard specification that sets the dimensions, materials, and testing requirements for blind flanges used in piping applications. This standard is widely recognized and used in North America, and it is one of the most common standards for piping flanges worldwide.
The ASME/ANSI B16.5 Blind Flange has a circular disk-like shape with bolt holes around the perimeter to allow for attachment to another flange or component. The flange’s thickness can vary depending on the application, and the raised face provides reinforcement for the bolt holes.
Blind flanges are commonly used in applications where the end of the pipe or valve needs to be sealed to prevent fluid from leaking out or entering the system. For example, they may be used at the end of a pipeline or valve where there is no need for a connection to another component.
The ASME/ANSI B16.5 standard specifies the dimensions and tolerances of the blind flange, including the outside diameter, bolt circle diameter, bolt hole diameter, and thickness. The standard also sets out the marking requirements and the testing procedures to ensure the quality and performance of the flange.
ASME/ANSI B16.5 Blind Flanges are available in a range of materials, including carbon steel, stainless steel, and alloy steel, among others. The material selection depends on the specific requirements of the application, such as the temperature, pressure, and corrosion resistance of the piping system.
In summary, ASME/ANSI B16.5 Blind Flanges are a type of flange that is used to seal the end of a pipe or valve. The standard sets out the dimensions, materials, and testing requirements for blind flanges used in piping applications. Blind flanges are commonly used to terminate a pipeline or valve and create a temporary seal for maintenance purposes. Proper selection, installation, and maintenance of ASME/ANSI B16.5 Blind Flanges are crucial to ensure a safe and reliable operation of the piping system.