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ASME B16.47 Class 400 Series A Flange (Weld Neck and Blind Flange)

2024-12-04 16:09:38 Hits:100 American Standards / Product Standards

At Haihao Group, we are proud to supply ASME B16.47 Class 400 Series A flanges, which are designed to meet the needs of high-pressure and large-diameter piping systems. These flanges, including both weld neck and blind flanges, provide reliable performance in demanding industrial applications.

Product Overview

Standard and Pressure Class:

Designed and manufactured to ASME B16.47 standard.

Rated for Class 400, ensuring robust performance under high-pressure conditions.

Types of Flanges:

Weld Neck Flanges (WN):

  • Ideal for critical connections where structural integrity is essential.
  • Provides a smooth transition between the flange and pipe, reducing stress concentration.

Blind Flanges (BL):

  • Used to seal off pipe ends or openings in pressure vessels.
  • Essential for system maintenance and testing.

Sizes:

  • Available in a range of sizes to suit large-diameter piping systems.

Dimension of ASME B16.47 Class 400 Series A Flange:

Dimensions of Class 400 Series A Flanges

Dimensions of Class 400 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 88.9 98.5 194 727 660.4 749 876.3 28 1 ⅞ 1 ¾ 11
28 1035 95.3 104.8 206 783 711.2 800 939.8 28 2 1 ⅞ 13
30 1090 101.6 111.2 219 837 762.0 857 997.0 28 2 ⅛ 2 13
32 1150 108.0 115.9 232 889 812.8 914 1054.1 28 2 ⅛ 2 13
34 1205 111.2 122.3 241 945 863.6 965 1104.9 28 2 ⅛ 2 14
36 1270 114.3 128.6 251 1000 914.4 1022 1168.4 32 2 ⅛ 2 14
38 1205 123.9 123.9 206 1003 965.2 1035 1117.6 32 1 ⅞ 1 ¾ 14
40 1270 130.2 130.2 216 1054 1016.0 1092 1174.8 32 2 1 ⅞ 14
42 1320 133.4 133.4 224 1108 1066.8 1143 1225.6 32 2 1 ⅞ 14
44 1385 139.7 139.7 233 1159 1117.6 1200 1282.7 32 2 ⅛ 2 14
46 1440 146.1 146.1 244 1213 1168.4 1257 1339.8 36 2 ⅛ 2 14
48 1510 152.4 152.4 257 1267 1219.2 1308 1403.4 28 2 ⅜ 2 ¼ 14
50 1570 157.2 158.8 268 1321 1270.0 1362 1460.5 32 2 ⅜ 2 ¼ 14
52 1620 162.0 163.6 276 1372 1320.8 1413 1511.3 32 2 ⅜ 2 ¼ 14
54 1700 169.9 171.5 289 1426 1371.6 1470 1581.2 28 2 ⅝ 2 ½ 14
56 1755 174.7 176.3 298 1480 1422.4 1527 1632.0 32 2 ⅝ 2 ½ 14
58 1805 177.8 181.0 306 1530 1473.2 1578 1682.8 32 2 ⅝ 2 ½ 14
60 1885 185.5 189.0 319 1584 1524.0 1635 1752.6 32 2 ⅞ 2 ¾ 14

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:

Material Options

The ASME B16.47 Class 400 Series A flanges can be manufactured in various materials to meet the requirements of different industries:

  • Carbon Steel: Cost-effective and suitable for general applications.
  • Stainless Steel (304/316): Resistant to corrosion, ideal for harsh environments.
  • Alloy Steel: Suitable for high-temperature and high-pressure applications.

Key Features

  • High Performance: Designed for strength and durability in high-pressure systems.
  • Compliance: Meets international standards for dimensions, materials, and pressure ratings.
  • Versatility: Available in multiple sizes and materials for compatibility with diverse systems.

Quality Assurance

At Haihao Group, we ensure all flanges meet strict quality standards:

Dimensional Accuracy: Verified to ensure precise fit and alignment.

Pressure Testing: Tested to meet Class 400 pressure ratings.

Material Certification: Each flange is accompanied by Mill Test Certificates (EN 10204 3.1) for traceability and assurance.

Surface Finish: Options available for specific project requirements, including anti-corrosion coatings.

Applications

ASME B16.47 Class 400 Series A flanges are widely used in:

  • Oil and gas pipelines
  • Petrochemical plants
  • Power generation systems
  • Marine and offshore installations

Partner with Haihao Group

With decades of expertise in manufacturing high-quality piping components, Haihao Group is your trusted partner for industrial piping solutions. Contact us today for more information about our ASME B16.47 Class 400 Series A weld neck and blind flanges or to request a quote. Email: sales@haihaogroup.com

Let Haihao Group support your projects with precision-engineered products built for reliability and performance.

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