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ASME B16.47 Class 300 Series A Flange (Weld Neck and Blind Flange)

2024-12-04 15:29:37 Hits:120 American Standards / Product Standards

The ASME B16.47 Class 300 Series A flanges are robust, large-diameter steel flanges designed for high-pressure pipeline applications. They come in two primary types: weld neck flanges and blind flanges, ensuring compatibility with a variety of industrial systems. These flanges are manufactured to meet the stringent requirements of pipelines ranging from NPS 26 inches to NPS 60 inches.

Key Features of Class 300 Series A Flanges

Pressure Class:Rated for Class 300, these flanges are designed to handle higher pressures compared to Class 150, making them suitable for demanding applications.

Types Available:

Weld Neck Flange: Features a long hub and is designed to be butt-welded to the pipe for maximum strength and seamless flow. Ideal for high-pressure, high-temperature environments.

Blind Flange: Used to seal the ends of pipelines, valves, or pressure vessels, providing a robust closure with no flow.

Design Features:

Series A: Heavier and thicker than Series B, offering greater strength and durability.

Bolt Circle Diameter: Larger than Series B for improved mechanical stability and reduced stress on the connection.

Materials: Common materials include carbon steel (ASTM A105, A350 LF2), stainless steel (ASTM A182 F304/F316), and alloy steel (ASTM A182 F11/F22), chosen for their strength, temperature resistance, and corrosion resistance.

Gasket Compatibility: Designed with Raised Face (RF) or Flat Face (FF) for secure sealing with standard gaskets.

Dimensional Accuracy: Complies with ASME standards for flange thickness, bolt holes, and outer diameter to ensure consistent performance.

Dimension of ASME B16.47 Class 300 Series A Flange:

Dimensions of Class 300 Series A Flanges

Dimensions of Class 300 Series A Flanges

Nominal Pipe Size O.D. of flange Minimum Thickness of Flange,tf[Note(1)] Length Through Hub Diam. of Hub Hub Diam. Top Raised Face Diam. Drilling Diam. of Bolt,in. Minimum Fillet Radius
O WNF Blind Y X[Note(2)] A R Diam. of Bolt Circle No. of Bolt Holes Diam. of Bolt Hole,in. r1
26 970 77.8 82.6 183 721 660.4 749 876.3 28 1 ¾ 1 ⅝ 10
28 1035 84.2 88.9 195 775 711.2 800 939.8 28 1 ¾ 1 ⅝ 11
30 1090 90.5 93.7 208 827 762.0 857 997.0 28 1 ⅞ 1 ¾ 11
32 1150 96.9 98.5 221 881 812.8 914 1054.1 28 2 1 ⅞ 11
34 1205 100.1 103.2 230 937 863.6 965 1104.9 28 2 1 ⅞ 13
36 1270 103.2 109.6 240 991 914.4 1022 1168.4 32 2 ⅛ 2 13
38 1170 106.4 106.4 179 994 965.2 1029 1092.2 32 1 ⅝ 1 ½ 13
40 1240 112.8 112.8 192 1048 1016.0 1086 1155.7 32 1 ¾ 1 ⅝ 13
42 1290 117.5 117.5 198 1099 1066.8 1137 1206.5 32 1 ¾ 1 ⅝ 13
44 1355 122.3 122.3 205 1149 1117.6 1194 1263.6 32 1 ⅞ 1 ¾ 13
46 1415 127.0 127.0 214 1203 1168.4 1245 1320.8 28 2 1 ⅞ 13
48 1465 131.8 131.8 222 1254 1219.2 1302 1371.6 32 2 1 ⅞ 13
50 1530 138.2 138.2 230 1305 1270.0 1359 1428.8 32 2 ⅛ 2 13
52 1580 142.9 142.9 237 1356 1320.8 1410 1479.6 32 2 ⅛ 2 13
54 1660 150.9 150.9 251 1410 1371.6 1467 1549.4 28 2 ⅜ 2 ¼ 13
56 1710 152.4 152.4 259 1464 1422.4 1518 1600.2 28 2 ⅜ 2 ¼ 13
58 1760 157.2 157.2 265 1514 1473.2 1575 1651.0 32 2 ⅜ 2 ¼ 13
60 1810 162.0 162.0 271 1565 1524.0 1626 1701.8 32 2 ⅜ 2 ¼ 13

GENERAL NOTES:
(a)Dimensions are in millimeters.
(b)Blind flanges may be made with or without hubs at the manufacturer’s option.
NOTES:
(1)The minimum flange thickness does not include the raised face thickness.
(2)This dimension is for the large end of hub,which may be straight or tapered.

Haihao Group can provide a variety ASME B16.47 standard flange,as follows:

Applications of Class 300 Series A Flanges

Class 300 Series A flanges are essential in industries requiring high-pressure reliability, such as:

  • Oil & Gas Pipelines: For crude oil, natural gas, and refined product transport.
  • Chemical Processing Plants: Used in systems handling high-pressure and corrosive materials.
  • Power Generation: For steam systems and high-temperature pipelines.
  • Water Treatment Plants: In large-diameter pipelines where strength and durability are crucial.

Advantages of Class 300 Series A Flanges

  1. Enhanced Strength: Thicker, heavier design ensures durability under high-pressure conditions.
  2. Leak-Resistant: Secure sealing reduces the risk of leaks, even under extreme pressure.
  3. Versatility: Compatible with various pipe materials and project specifications.
  4. Long Service Life: Manufactured from premium materials for extended performance in harsh environments.

Why Choose Haihao Group for ASME B16.47 Class 300 Series A Flanges?

At Haihao Group, we offer high-quality Class 300 Series A Weld Neck and Blind Flanges, tailored to meet your specific needs.

  • Precision Manufacturing: Produced to ASME B16.47 standards for flawless integration into pipeline systems.
  • Material Excellence: Made from top-grade materials like ASTM A105 carbon steel for maximum reliability.
  • Rigorous Testing: Each flange undergoes stringent inspections to ensure performance and safety.
  • Global Delivery: Serving industries worldwide with timely and secure shipping.

Need ASME B16.47 Class 300 Series A weld neck or blind flanges for your next project? Haihao Group is here to provide reliable, high-quality solutions. Contact us today for detailed information, technical support, or a customized quote! Email:sales@haihaogroup.com

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