ASME/ANSI B16.47 Series A Blind Flanges
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ASME/ANSI B16.47 Flange Series A Blind Flanges are a type of blind flange that conforms to the requirements of the ASME/ANSI B16.47 Series A standard. This standard covers large-diameter steel flanges that range from NPS 26 through NPS 60 (nominal pipe size), and are designed for use in high-pressure and high-temperature applications.
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ASME/ANSI B16.47 Series A Blind Flanges
ASME/ANSI B16.47 Class 150 Series A 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 | Minimum Thickness (T) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|
| 26 | 34.25 | 31.75 | 29.50 | 24 | 1.38 | 2.69 | 702 |
| 28 | 36.50 | 34.00 | 31.50 | 28 | 1.38 | 2.81 | 833 |
| 30 | 38.75 | 36.00 | 33.75 | 28 | 1.38 | 2.94 | 982 |
| 32 | 41.75 | 38.50 | 36.00 | 28 | 1.62 | 3.19 | 1238 |
| 34 | 43.75 | 40.50 | 38.00 | 32 | 1.62 | 3.25 | 1384 |
| 36 | 46.00 | 42.75 | 40.25 | 32 | 1.62 | 3.56 | 1676 |
| 38 | 48.75 | 45.25 | 42.25 | 32 | 1.62 | 3.44 | 1819 |
| 40 | 50.75 | 47.25 | 44.25 | 36 | 1.62 | 3.56 | 2040 |
| 42 | 53.00 | 49.50 | 47.00 | 36 | 1.62 | 3.81 | 2380 |
| 44 | 55.25 | 51.75 | 49.00 | 40 | 1.62 | 4.00 | 2715 |
| 46 | 57.25 | 53.75 | 51.00 | 40 | 1.62 | 4.06 | 2961 |
| 48 | 59.50 | 56.00 | 53.50 | 44 | 1.62 | 4.25 | 3350 |
| 50 | 61.75 | 58.25 | 55.50 | 44 | 1.88 | 4.38 | 3716 |
| 52 | 64.00 | 60.50 | 57.50 | 44 | 1.88 | 4.56 | 4156 |
| 54 | 66.25 | 62.75 | 59.50 | 44 | 1.88 | 4.75 | 4639 |
| 56 | 68.75 | 65.00 | 62.00 | 48 | 1.88 | 4.88 | 5130 |
| 58 | 71.00 | 67.25 | 64.00 | 48 | 1.88 | 5.06 | 5675 |
| 60 | 73.00 | 69.25 | 66.00 | 52 | 1.88 | 5.19 | 6155 |
ASME/ANSI B16.47 Class 300 Series A 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 | Minimum Thickness (T) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|
| 26 | 38.25 | 34.50 | 29.50 | 28 | 1.75 | 3.31 | 1079 |
| 28 | 40.75 | 37.00 | 31.50 | 28 | 1.75 | 3.56 | 1315 |
| 30 | 43.00 | 39.25 | 33.75 | 28 | 1.88 | 3.75 | 1545 |
| 32 | 45.25 | 41.50 | 36.00 | 28 | 2.00 | 3.94 | 1795 |
| 34 | 47.50 | 43.50 | 38.00 | 28 | 2.00 | 4.12 | 2068 |
| 36 | 50.00 | 46.00 | 40.25 | 32 | 2.12 | 4.38 | 2435 |
| 38 | 46.00 | 43.00 | 40.50 | 32 | 1.62 | 4.25 | 2001 |
| 40 | 48.75 | 45.50 | 42.75 | 32 | 1.75 | 4.50 | 2380 |
| 42 | 50.75 | 47.50 | 44.75 | 32 | 1.75 | 4.69 | 2689 |
| 44 | 53.25 | 49.75 | 47.00 | 32 | 1.88 | 4.88 | 3079 |
| 46 | 55.75 | 52.00 | 49.00 | 28 | 2.00 | 5.06 | 3500 |
| 48 | 57.75 | 54.00 | 51.25 | 32 | 2.00 | 5.25 | 3896 |
| 50 | 60.25 | 56.25 | 53.50 | 32 | 2.12 | 5.50 | 4442 |
| 52 | 62.25 | 58.25 | 55.50 | 32 | 2.12 | 5.69 | 4906 |
| 54 | 65.25 | 61.00 | 57.75 | 28 | 2.38 | 6.00 | 5684 |
| 56 | 67.25 | 63.00 | 59.75 | 28 | 2.38 | 6.06 | 6099 |
| 58 | 69.25 | 65.00 | 62.00 | 32 | 2.38 | 6.25 | 6669 |
| 60 | 71.25 | 67.00 | 64.00 | 32 | 2.38 | 6.44 | 7274 |
ASME/ANSI B16.47 Class 400 Series A 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 | Minimum Thickness (T) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|
| 26 | 38.25 | 34.50 | 29.50 | 28 | 1.88 | 3.88 | 1263 |
| 28 | 40.75 | 37.00 | 31.50 | 28 | 2.00 | 4.12 | 1520 |
| 30 | 43.00 | 39.25 | 33.75 | 28 | 2.12 | 4.38 | 1802 |
| 32 | 45.25 | 41.50 | 36.00 | 28 | 2.12 | 4.56 | 2075 |
| 34 | 47.50 | 43.50 | 38.00 | 28 | 2.12 | 4.81 | 2415 |
| 36 | 50.00 | 46.00 | 40.25 | 32 | 2.12 | 5.06 | 2815 |
| 38 | 47.50 | 44.00 | 40.75 | 32 | 1.88 | 4.88 | 2450 |
| 40 | 50.00 | 46.25 | 43.00 | 32 | 2.00 | 5.12 | 2849 |
| 42 | 52.00 | 48.25 | 45.00 | 32 | 2.00 | 5.25 | 3160 |
| 44 | 54.50 | 50.50 | 47.25 | 32 | 2.12 | 5.50 | 3635 |
| 46 | 56.75 | 52.75 | 49.50 | 36 | 2.12 | 5.75 | 4120 |
| 48 | 59.50 | 55.25 | 51.50 | 28 | 2.38 | 6.00 | 4725 |
| 50 | 61.75 | 57.50 | 53.62 | 32 | 2.38 | 6.25 | 5303 |
| 52 | 63.75 | 59.50 | 55.62 | 32 | 2.38 | 6.44 | 5823 |
| 54 | 67.00 | 62.25 | 57.88 | 28 | 2.62 | 6.75 | 6742 |
| 56 | 69.00 | 64.25 | 60.12 | 32 | 2.62 | 6.94 | 7352 |
| 58 | 71.00 | 66.25 | 62.12 | 32 | 2.62 | 7.12 | 7986 |
| 60 | 74.25 | 69.00 | 64.38 | 32 | 2.88 | 7.44 | 9126 |
ASME/ANSI B16.47 Class 600 Series A 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 | Minimum Thickness (T) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|
| 26 | 40.00 | 36.00 | 29.50 | 28 | 2.00 | 4.94 | 1760 |
| 28 | 42.25 | 38.00 | 31.50 | 28 | 2.12 | 5.19 | 2061 |
| 30 | 44.50 | 40.25 | 33.75 | 28 | 2.12 | 5.50 | 2423 |
| 32 | 47.00 | 42.50 | 36.00 | 28 | 2.38 | 5.81 | 2858 |
| 34 | 49.00 | 44.50 | 38.00 | 28 | 2.38 | 6.06 | 3237 |
| 36 | 51.75 | 47.00 | 40.25 | 28 | 2.62 | 6.38 | 3800 |
| 38 | 50.00 | 45.75 | 41.50 | 28 | 2.38 | 6.12 | 3405 |
| 40 | 52.00 | 47.75 | 43.75 | 32 | 2.38 | 6.38 | 3838 |
| 42 | 55.25 | 50.50 | 46.00 | 28 | 2.62 | 6.75 | 4585 |
| 44 | 57.25 | 52.50 | 48.25 | 32 | 2.62 | 7.00 | 5105 |
| 46 | 59.50 | 54.75 | 50.25 | 32 | 2.62 | 7.31 | 5758 |
| 48 | 62.75 | 57.50 | 52.50 | 32 | 2.88 | 7.69 | 6737 |
| 50 | 65.75 | 60.00 | 54.50 | 28 | 3.12 | 8.00 | 7695 |
| 52 | 67.75 | 62.00 | 56.50 | 32 | 3.12 | 8.25 | 8425 |
| 54 | 70.00 | 64.25 | 58.75 | 32 | 3.12 | 8.56 | 9333 |
| 56 | 73.00 | 66.75 | 60.75 | 32 | 3.38 | 8.88 | 10,530 |
| 58 | 75.00 | 68.75 | 63.00 | 32 | 3.38 | 9.12 | 11,414 |
| 60 | 78.50 | 71.75 | 65.25 | 28 | 3.62 | 9.56 | 13,108 |
ASME/ANSI B16.47 Class 900 Series A 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 | Minimum Thickness (T) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|
| 26 | 42.75 | 37.50 | 29.50 | 20 | 2.88 | 6.31 | 2565 |
| 28 | 46.00 | 40.25 | 31.50 | 20 | 3.12 | 6.75 | 3178 |
| 30 | 48.50 | 42.75 | 33.75 | 20 | 3.12 | 7.18 | 3759 |
| 32 | 51.75 | 45.50 | 36.00 | 20 | 3.38 | 7.62 | 4541 |
| 34 | 55.00 | 48.25 | 38.00 | 20 | 3.62 | 8.06 | 5425 |
| 36 | 57.50 | 50.75 | 40.25 | 20 | 3.62 | 8.44 | 6210 |
| 38 | 57.50 | 50.75 | 43.25 | 20 | 3.62 | 8.50 | 6253 |
| 40 | 59.50 | 52.75 | 45.75 | 24 | 3.62 | 8.81 | 6940 |
| 42 | 61.50 | 54.75 | 47.75 | 24 | 3.62 | 9.12 | 7675 |
| 44 | 64.88 | 57.62 | 50.00 | 24 | 3.88 | 9.56 | 8955 |
| 46 | 68.25 | 60.50 | 52.50 | 24 | 4.12 | 10.06 | 10,426 |
| 48 | 70.25 | 62.50 | 54.50 | 24 | 4.12 | 10.38 | 11,398 |
ASME/ANSI B16.47 Flange Series A Blind Flanges are a type of blind flange that conform to the requirements of the ASME/ANSI B16.47 Series A standard. This standard covers large diameter steel flanges that range from NPS 26 through NPS 60 (nominal pipe size), and are designed for use in high pressure and high-temperature applications.
Series A flanges are designed for use with raised face (RF) flanges, and are used in applications where the flange needs to be bolted to another flange, such as a valve or a piece of equipment. Series A blind flanges are used to seal off the end of a pipeline, and they provide a positive barrier that prevents fluid from entering or leaving the pipeline.
The ASME/ANSI B16.47 Series A standard specifies the dimensions, tolerances, materials, and testing requirements for these flanges. The standard specifies that the blind flange thickness must be equivalent to the thickness of a corresponding RF flange, and it also provides detailed dimensions for the bolt holes and other critical features of the flange.
One of the key benefits of Series A blind flanges is that they provide a safe and reliable seal for high-pressure and high-temperature pipelines. The flanges are designed to withstand extreme conditions, and they are often used in critical applications such as oil and gas pipelines, chemical processing, and power generation.
In addition to their strength and durability, Series A blind flanges are also easy to install and maintain. They can be quickly bolted onto the end of a pipeline, and they are designed to be easy to remove and replace as needed. This makes them an ideal solution for pipelines that require frequent maintenance or repair.
In summary, ASME/ANSI B16.47 Flange Series A Blind Flanges are a type of blind flange that conform to the requirements of the ASME/ANSI B16.47 Series A standard. They are designed for use in high-pressure and high-temperature applications and are commonly used in the oil and gas, chemical processing, and power generation industries. These flanges are strong, durable, and easy to install and maintain, making them an ideal solution for pipelines that require a reliable and long-lasting seal.
Here is a table outlining the specifications and characteristics of ASME/ANSI B16.47 Series A Blind Flanges:
| Specification/Feature | Description |
|---|---|
| Standard | ASME/ANSI B16.47 Series A 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 Rating | Available in various pressure ratings, such as 150, 300, 600, 900, etc., depending on the application requirements. |
| Size Range | Typically available in a wide range of sizes to accommodate different pipe and equipment dimensions. |
| Material | Can be manufactured from a variety of materials, including carbon steel, stainless steel, alloy steel, etc., chosen based on application requirements. |
| Facing Type | Series A Blind Flanges typically have Raised Face (RF) facing, providing a reliable sealing surface. |
| Bolt Hole Quantity and Diameter | The number and diameter of bolt holes vary with flange size and pressure rating, facilitating flange connection. |
| Seal Type | Series A Blind Flanges commonly use gaskets or O-rings for sealing. |
| Performance Characteristics | Known for their high-pressure-bearing capacity, durability, and suitability for critical applications. |
| Application Areas | Widely used in industries such as oil and gas, petrochemical, power generation, and more for sealing off pipe or vessel openings. |
| Manufacturing Standards | Manufactured in compliance with ASME/ANSI B16.47 Series A standard and relevant ASME codes. |
This table provides a comprehensive overview of ASME/ANSI B16.47 Series A Blind Flanges, including their specifications, characteristics, and application areas. Specific requirements may vary depending on the chosen flange size, pressure rating, and material.
Required Fasteners:
The fastener quality requirement for ASME B16.47 Series A flanges is less than for Series A. Class 150 series A flange needs 28 bolts with sizes of 1-1/4-inch diameter to install. The total number of fasteners for ASME B16.47 Series B flanges is higher than for Series A. For class 150 Series B flange needs 44 bolts with a diameter of 3/ 4 inches diameter to install. The smaller bolt circle width affects the movement of the flange after installation.
Types:
Series A and Series B standards include blind flanges as well as weld neck flanges in raised face type (RF). But Series A illustrates ring type joint (RTJ) flanges with the different classes such as from Class 300 to Class 900.
Cost:
The cost of ASME B16.47 Series A flanges is more than ASME B16.47 Series B flanges.
Use:
Series A flanges are perfect for many piping end users for the new pipeline or connections. Series B flanges are perfect for refurbishment or replacement work and also for non-critical piping applications. In industry, Series A flanges are suitable for all complex applications, but Series B flanges are only suitable for easy applications.
Weight of Flange:
ASME B16.47 Series A flanges are heavier, and hence they can so exert more extra weight on piping supports. The weight of ASME B16.47 Series B flanges is comparatively less and therefore cannot sustain in high load.
Pressure class :
This unique pressure class is available in ASME B16.47 Series B flanges but not available in ASME B16.47 Series A flanges.
Dimensions:
The dimension of Series A flanges is larger because the bolt circle diameter, flange outer diameter, bolt diameter, flange thickness, etc., are larger. But Series A flanges are compact in dimension as compared to series A flanges.
Alternative designations:
In the beginning, ASME B16.47 Series A carbon steel flanges were identified as MSS SP 44 flanges, and ASME B16.47 Series B flanges were recognized as API 605 flanges.