ASME/ANSI B16.47 Series A Weld Neck Flange

Our company provides ASME/ANSI B16.47 Flange Series A Weld Neck Flange.

The ASME/ANSI B16.47 Flange Series A Weld Neck Flange is a type of flange designed for use in high-pressure and high-temperature applications. It conforms to the requirements of the ASME/ANSI B16.47 Series A standard, which covers large-diameter steel flanges that range from NPS 26 through NPS 60 (nominal pipe size).

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ASME/ANSI B16.47 Flange Series A Weld Neck Flange

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ASME/ANSI B16.47 Class 150 Series A Welding Neck 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!

(C)Standard Bore will be furnished unless otherwise specified. For more diameter of holes, please click here!

Nominal Pipe SizeOutside Diameter (O)Bolt Circle (W)Raised Face Diameter (R)Number of HolesDiameter of HolesBore (B)Top of Hub (A)Hub Diameter (X)Minimum Fillet Radius (r)Minimum Thickness (T)Length Thru Hub (Y)Approximate Weight (lbs)
2634.2531.7529.50241.38Specified by purchaser26.0026.620.382.694.75300
2836.5034.0031.50281.38Specified by purchaser28.0028.620.442.814.94345
3038.7536.0033.75281.38Specified by purchaser30.0030.750.442.945.38400
3241.7538.5036.00281.62Specified by purchaser32.0032.750.443.195.69505
3443.7540.5038.00321.62Specified by purchaser34.0034.750.503.255.88540
3646.0042.7540.25321.62Specified by purchaser36.0036.750.503.566.19640
3848.7545.2542.25321.62Specified by purchaser38.0039.000.503.446.19720
4050.7547.2544.25361.62Specified by purchaser40.0041.000.503.566.44775
4253.0049.5047.00361.62Specified by purchaser42.0043.000.503.816.75890
4455.2551.7549.00401.62Specified by purchaser44.0045.000.504.007.00990
4657.2553.7551.00401.62Specified by purchaser46.0047.120.504.067.311060
4859.5056.0053.50441.62Specified by purchaser48.0049.120.504.257.561185
5061.7558.2555.50441.88Specified by purchaser50.0051.250.504.388.001270
5264.0060.5057.50441.88Specified by purchaser52.0053.250.504.568.251410
5466.2562.7559.50441.88Specified by purchaser54.0055.250.504.758.501585
5668.7565.0062.00481.88Specified by purchaser56.0057.380.504.889.001760
5871.0067.2564.00481.88Specified by purchaser58.0059.380.505.069.251915
6073.0069.2566.00521.88Specified by purchaser60.0061.380.505.199.442045

ASME/ANSI B16.47 Class 300 Series A Welding Neck 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!

(C)Standard Bore will be furnished unless otherwise specified. For more diameter of holes, please click here!

Nominal Pipe SizeOutside Diameter (O)Bolt Circle (W)Raised Face Diameter (R)Number of HolesDiameter of HolesBore (B)Top of Hub (A)Hub Diameter (X)Minimum Fillet Radius (r)Minimum Thickness (T)Length Thru Hub (Y)Approximate Weight (lbs)
2638.2534.5029.50281.75Specified by purchaser26.0028.380.383.127.25605
2840.7537.0031.50281.75Specified by purchaser28.0030.500.443.387.75745
3043.0039.2533.75281.88Specified by purchaser30.0032.560.443.628.25870
3245.2541.5036.00282.00Specified by purchaser32.0034.690.443.888.751005
3447.5043.5038.00282.00Specified by purchaser34.0036.880.504.009.121145
3650.0046.0040.25322.12Specified by purchaser36.0039.000.504.129.501275
3846.0043.0040.50321.62Specified by purchaser38.0039.120.504.257.12695
4048.7545.5042.75321.75Specified by purchaser40.0041.250.504.507.62840
4250.7547.5044.75321.75Specified by purchaser42.0043.250.504.697.88950
4453.2549.7547.00321.88Specified by purchaser44.0045.250.504.888.121055
4655.7552.0049.00282.00Specified by purchaser46.0047.380.505.068.501235
4857.7554.0051.25322.00Specified by purchaser48.0049.380.505.258.811380
5060.2556.2553.50322.12Specified by purchaser50.0051.380.505.509.121530
5262.2558.2555.50322.12Specified by purchaser52.0053.380.505.699.381660
5465.2561.0057.75282.38Specified by purchaser54.0055.500.506.009.942050
5667.2563.0059.75282.38Specified by purchaser56.0057.620.506.0610.252155
5869.2565.0062.00322.38Specified by purchaser58.0059.620.506.2510.502270
6071.2567.0064.00322.38Specified by purchaser60.0061.620.506.4410.752470

ASME/ANSI B16.47 Class 400 Series A Welding Neck 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 SizeOutside Diameter (O)Bolt Circle (W)Raised Face Diameter (R)Number of HolesDiameter of HolesBore (B)Top of Hub (A)Hub Diameter (X)Minimum Fillet Radius (r)Minimum Thickness (T)Length Thru Hub (Y)Approximate Weight (lbs)
2638.2534.5029.50281.88Specified by purchaser26.0028.620.443.507.62650
2840.7537.0031.50282.00Specified by purchaser28.0030.810.503.758.12785
3043.0039.2533.75282.12Specified by purchaser30.0032.940.504.008.62905
3245.2541.5036.00282.12Specified by purchaser32.0035.000.504.259.121065
3447.5043.5038.00282.12Specified by purchaser34.0037.190.564.389.501200
3650.0046.0040.25322.12Specified by purchaser36.0039.380.564.509.881340
3847.5044.0040.75321.88Specified by purchaser38.0039.500.564.888.12935
4050.0046.2543.00322.00Specified by purchaser40.0041.500.565.128.501090
4252.0048.2545.00322.00Specified by purchaser42.0043.620.565.258.811190
4454.5050.5047.25322.12Specified by purchaser44.0045.620.565.509.181375
4656.7552.7549.50362.12Specified by purchaser46.0047.750.565.759.621525
4859.5055.2551.50282.38Specified by purchaser48.0049.880.566.0010.121790
5061.7557.5053.62322.38Specified by purchaser50.0052.000.566.1910.561950
5263.7559.5055.62322.38Specified by purchaser52.0054.000.566.3810.882125
5467.0062.2557.88282.62Specified by purchaser54.0056.120.566.6911.382565
5669.0064.2560.12322.62Specified by purchaser56.0058.250.566.8811.752710
5871.0066.2562.12322.62Specified by purchaser58.0060.250.567.0012.063230
6074.2569.0064.38322.88Specified by purchaser60.0062.380.567.3112.563820

ASME/ANSI B16.47 Class 600 Series A Welding Neck 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 SizeOutside Diameter (O)Bolt Circle (W)Raised Face Diameter (R)Number of HolesDiameter of HolesBore (B)Top of Hub (A)Hub Diameter (X)Minimum Fillet Radius (r)Minimum Thickness (T)Length Thru Hub (Y)Approximate Weight (lbs)
2640.0036.0029.50282.00Specified by purchaser26.0029.440.504.258.75940
2842.2538.0031.50282.12Specified by purchaser28.0031.620.504.389.251060
3044.5040.2533.75282.12Specified by purchaser30.0033.940.504.509.751210
3247.0042.5036.00282.38Specified by purchaser32.0036.120.504.6210.251375
3449.0044.5038.00282.38Specified by purchaser34.0038.310.564.7510.621540
3651.7547.0040.25282.62Specified by purchaser36.0040.620.564.8811.121705
3850.0045.7541.50282.38Specified by purchaser38.0040.250.566.0010.001470
4052.0047.7543.75322.38Specified by purchaser40.0042.250.566.2510.381630
4255.2550.5046.00282.62Specified by purchaser42.0044.380.566.6211.002030
4457.2552.5048.25322.62Specified by purchaser44.0046.500.566.8111.382160
4659.5054.7550.25322.62Specified by purchaser46.0048.620.567.0611.812410
4862.7557.5052.50322.88Specified by purchaser48.0050.750.567.4412.442855
5065.7560.0054.50283.12Specified by purchaser50.0052.880.567.7512.943330
5267.7562.0056.50323.12Specified by purchaser52.0054.880.568.0013.253560
5470.0064.2558.75323.12Specified by purchaser54.0057.000.568.2513.753920
5673.0066.7560.75323.38Specified by purchaser56.0059.120.628.5614.254280
5875.0068.7563.00323.38Specified by purchaser58.0061.120.628.7514.564640
6078.5071.7565.25283.62Specified by purchaser60.0063.380.699.1915.315000

ASME/ANSI B16.47 Class 900 Series A Welding Neck 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 SizeOutside Diameter (O)Bolt Circle (W)Raised Face Diameter (R)Number of HolesDiameter of HolesBore (B)Top of Hub (A)Hub Diameter (X)Minimum Fillet Radius (r)Minimum Thickness (T)Length Thru Hub (Y)Approximate Weight (lbs)
2642.7537.5029.50202.88Specified by purchaser26.0030.500.445.5011.251525
2846.0040.2531.50203.12Specified by purchaser28.0032.750.505.6211.751810
3048.5042.7533.75203.12Specified by purchaser30.0035.000.505.8812.252120
3251.7545.5036.00203.38Specified by purchaser32.0037.250.506.2513.002545
3455.0048.2538.00203.62Specified by purchaser34.0039.620.566.5013.752970
3657.5050.7540.25203.62Specified by purchaser36.0041.880.566.7514.253395
3857.5050.7543.25203.62Specified by purchaser38.0042.250.757.5013.883385
4059.5052.7545.75243.62Specified by purchaser40.0044.380.817.7514.313620
4261.5054.7547.75243.62Specified by purchaser42.0046.310.818.1214.623960
4464.8857.6250.00243.88Specified by purchaser44.0048.620.888.4415.384300
4668.2560.5052.50244.12Specified by purchaser46.0050.880.888.8816.184640
4870.2562.5054.50244.12Specified by purchaser48.0052.880.949.1916.504980

ASME/ANSI B16.47 Series A Weld Neck Flanges Main Features and Specifications Table

Here is a table outlining the specifications and characteristics of ASME/ANSI B16.47 Series A Weld Neck Flanges:

Specification/FeatureDescription
StandardASME/ANSI B16.47 Series A Weld Neck Flange.
TypeWeld Neck Flange – A type of flange with a long tapered neck that is butt-welded to the pipe, providing excellent strength and stress distribution.
Pressure RatingAvailable in various pressure ratings, such as 150, 300, 600, 900, etc., depending on the application requirements.
Size RangeTypically available in a wide range of sizes to accommodate different pipe and equipment dimensions.
MaterialCan be manufactured from a variety of materials, including carbon steel, stainless steel, alloy steel, etc., chosen based on application requirements.
Facing TypeSeries A Weld Neck Flanges typically have Raised Face (RF) facing, which provides a reliable sealing surface.
Bolt Hole Quantity and DiameterThe number and diameter of bolt holes vary with flange size and pressure rating, facilitating flange connection.
Seal TypeSeries A Weld Neck Flanges commonly use gaskets or O-rings for sealing.
Performance CharacteristicsKnown for their high-pressure-bearing capacity, durability, and suitability for critical applications.
Application AreasWidely used in industries such as oil and gas, petrochemical, power generation, and more for connecting high-pressure piping systems.
Manufacturing StandardsManufactured in compliance with ASME/ANSI B16.47 Series A standard and relevant ASME codes.
ASME/ANSI B16.47 Series A Weld Neck Flanges Main Features and Specifications Table

This table provides a comprehensive overview of ASME/ANSI B16.47 Series A Weld Neck Flanges, including their specifications, characteristics, and application areas. Specific requirements may vary depending on the chosen flange size, pressure rating, and material.

Characteristics:

ASME B16 47 Series A flanges are much heavier, thicker, and more robust than Series B flanges with the same pressure rating and size. Hence, series A flanges can easily withstand extra external loading than Series B flanges.

The ASME/ANSI B16.47 Flange Series A Weld Neck Flange is a type of flange designed for use in high-pressure and high-temperature applications. It conforms to the requirements of the ASME/ANSI B16.47 Series A standard, which covers large-diameter steel flanges that range from NPS 26 through NPS 60 (nominal pipe size).

Weld neck flanges are designed with a long tapered hub that is welded to a pipe or fitting, and they are used to provide a strong, reliable connection between two sections of piping or equipment. The hub of the weld neck flange is designed to withstand high stresses, and it provides reinforcement to the connection point.

The ASME/ANSI B16.47 Series A standard specifies the dimensions, tolerances, materials, and testing requirements for these flanges. The standard provides detailed dimensions for the weld neck flange hub, as well as for the bolt holes, gasket surface, and other critical features of the flange.

One of the key benefits of Series A weld neck flanges is their ability to provide a strong and reliable connection in high-pressure and high-temperature applications. 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 weld neck flanges are also easy to install and maintain. They can be quickly welded to the end of a pipe or fitting, and they are designed to be easy to remove and replace as needed. This makes them an ideal solution for pipelines and equipment that require frequent maintenance or repair.

In summary, ASME/ANSI B16.47 Flange Series A Weld Neck Flanges are a type of 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 provide a strong and reliable connection between two sections of piping or equipment and are easy to install and maintain.

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 75:

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.

ASME B16 47 Series A flanges are thicker, heavier, and stronger than their Series B counterparts. They also can often handle more external loading than Series B. Series A flanges tend to be more costly than Series B flanges.

Weld neck flanges are used in applications where the conditions are severe and critical. Some of these conditions include high pressure, wide fluctuations in temperature and pressure, high temperature, fluids that are volatile and hazardous, and temperatures in the sub-zero range.

ASME B16. 47(Large Diameter Steel Flanges) is a standard for large-diameter steel pipe flanges sized from NPS 26 through NPS 60. The latest version provides dimensions and ratings in both metric and inch units. The ASME B16.

ASME B16. 47(Large Diameter Steel Flanges) is a standard for large-diameter steel pipe flanges sized from NPS 26 through NPS 60. The latest version provides dimensions and ratings in both metric and inch units. The ASME B16.

Weld neck flange is available in both raised-face and flat-face configurations. Most common weld neck flanges have standard bore or extra heavy bore. Sch 120 or Sch 160 bore flanges in heavier weights such as 600# to 1500# are also common in weld neck flanges.

ANSI Flanges are manufactured based on standards developed by organizations and ASME Flanges are based on codes and standards for mechanical devices. The ANSI Flanges are designed based on approx. 9500 standards whereas ASME Flanges are manufactured on 600 codes and standards for different mechanical devices.