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

2024-12-12 14:54:01 Hits:112 American Standards / Product Standards

ASME B16.47 Class 300 Series B flanges are essential components for high-performance piping systems, ensuring reliable connections in industries such as oil and gas, chemical processing, and power generation. These flanges are designed for large-diameter pipes and are available in two primary types: weld neck flanges and blind flanges.

Key Features

Compliance with ASME Standards: Manufactured according to ASME B16.47 standards for large-diameter steel flanges.

Flange Types:

Weld Neck Flanges (WN): Feature a long hub welded to the pipe for excellent strength and reduced stress concentration.

Blind Flanges (BL): Used to close the ends of piping systems, ensuring a tight seal.

Material Options:

  • Carbon Steel (e.g., ASTM A105, A350 LF2)
  • Stainless Steel (e.g., ASTM A182 F304/F316)
  • Alloy Steel (e.g., ASTM A182 F11/F22)

Sizes: Available in nominal pipe sizes NPS 26 to NPS 60.

Sealing Face Options:

  • Raised Face (RF)
  • Flat Face (FF)
  • Ring-Type Joint (RTJ)

Dimensions of ASME B16.47 Class 300 Series B Flange:

Dimension of ASME B16.47 Class 300 Series B Flange

Dimension of ASME B16.47 Class 300 Series B Flange

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
26 865 87.4 87.4 143 702 665.2 737 803.3 32 1 ⅜ 1 ¼ 14
28 920 87.4 87.4 148 756 716.0 787 857.2 36 1 ⅜ 1 ¼ 14
30 990 92.1 92.1 156 813 768.4 845 920.8 36 1 ½ 1 ⅜ 14
32 1055 101.6 101.6 167 864 819.2 902 977.9 32 1 ⅝ 1 ½ 16
34 1110 101.6 101.6 171 918 870.0 953 1031.9 36 1 ⅝ 1 ½ 16
36 1170 101.6 101.6 179 965 920.8 1010 1089.0 32 1 ¾ 1 ⅝ 16
38 1220 109.6 109.6 191 1016 971.6 1060 1139.8 36 1 ¾ 1 ⅝ 16
40 1275 114.3 114.3 197 1067 1022.4 1114 1190.6 40 1 ¾ 1 ⅝ 16
42 1335 117.5 117.5 203 1118 1074.7 1168 1244.6 36 1 ⅞ 1 ¾ 16
44 1385 125.5 125.5 213 1173 1125.5 1219 1295.4 40 1 ⅞ 1 ¾ 16
46 1460 127.0 128.6 221 1229 1176.3 1270 1365.2 36 2 1 ⅞ 16
48 1510 127.0 133.4 222 1278 1227.1 1327 1416.0 40 2 1 ⅞ 16
50 1560 136.6 138.2 233 1330 1277.9 1378 1466.8 44 2 1 ⅞ 16
52 1615 141.3 142.6 241 1383 1328.7 1429 1517.6 48 2 1 ⅞ 16
54 1675 135.0 147.7 238 1435 1379.5 1480 1578.0 48 2 1 ⅞ 16
56 1765 152.4 155.4 267 1494 1430.3 1537 1651.0 36 2 ⅜ 2 ¼ 17
58 1825 152.4 160.4 273 1548 1481.1 1594 1712.9 40 2 ⅜ 2 ¼ 17
60 1880 149.3 165.1 270 1599 1531.9 1651 1763.7 40 2 ⅜ 2 ¼ 17

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

ASME B16.47 Class 300 Series B flanges are widely used in:

  • Oil and Gas Pipelines
  • Petrochemical Facilities
  • Power Plants
  • Marine Engineering
  • Water Treatment Systems

Advantages

High Strength and Durability: Engineered for demanding environments with excellent resistance to pressure and temperature fluctuations.

Enhanced Seal Integrity:

  • Precision-machined sealing faces ensure leak-proof connections.
  • Blind flanges provide secure system isolation.

 

Customization Options: Available with different materials, coatings, and sizes to suit specific project needs.

Ease of Installation: Weld neck flanges offer smooth transitions for better stress distribution.

Quality Assurance

  • Manufactured and tested according to ASME B16.47 specifications.
  • Certified test reports, including material certificates, dimensional inspection reports, and pressure testing results.
  • Additional testing options: ultrasonic testing (UT), magnetic particle testing (MT), and radiographic testing (RT).

Why Choose Haihao Group?

Haihao Group is a trusted supplier of ASME B16.47 Class 300 Series B flanges. With decades of experience, we deliver high-quality piping components that meet the most stringent industry standards. Our commitment to innovation, precision manufacturing, and customer satisfaction ensures that your piping systems perform at their best.

For inquiries or to request a quote for ASME B16.47 Class 300 Series B weld neck and blind flanges, contact Haihao Group today! Email:sales@haihaogroup.com

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