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ASME B16.47 Class 75 Series B Flange (Weld Neck and Blind Flange)

2024-12-11 15:14:04 Hits:93 American Standards / Product Standards

Haihao Group specializes in manufacturing ASME B16.47 Class 75 Series B flanges, designed to meet the specific needs of large-diameter piping systems operating under lower-pressure applications. These flanges are available in both weld neck and blind flange configurations, offering reliable performance and compliance with global standards.

Key Specifications

Standard: ASME B16.47

Pressure Class: 75#

Series B Features:

Smaller bolt holes compared to Series A.

Optimized for systems where lighter and more cost-effective flanges are suitable.

Flange Types:

  • Weld Neck Flanges: Ideal for critical joints with enhanced stress distribution.
  • Blind Flanges: Perfect for sealing the ends of pipelines or isolating sections of piping systems.

Sealing Surface Options:

  • Raised Face (RF)
  • Flat Face (FF)

Dimension of ASME B16.47 Class 75 Series B Flange(Weld Neck and Blind Flange):

Dimension of ASME B16.47 Class 75 Series B Flange

Dimension of ASME B16.47 Class 75 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
26 760 31.9 31.9 57 676 661.9 705 723.9 36 ¾ ⅝ 8
28 815 31.9 31.9 60 727 712.7 756 774.7 40 ¾ ⅝ 8
30 865 31.9 31.9 64 778 763.5 806 825.5 44 ¾ ⅝ 8
32 915 33.5 35.0 68 829 814.3 857 876.3 48 ¾ ⅝ 8
34 965 33.5 36.6 72 879 865.1 908 927.1 52 ¾ ⅝ 8
36 1035 35.0 40.9 84 935 915.9 965 992.2 40 ⅞ ¾ 10
38 1085 36.6 43.0 87 986 966.7 1016 1043.0 40 ⅞ ¾ 10
40 1135 36.6 43.0 91 1037 1017.5 1067 1093.8 44 ⅞ ¾ 10
42 1185 38.2 46.3 94 1087 1068.3 1118 1144.6 48 ⅞ ¾ 10
44 1250 41.4 47.7 103 1140 1119.1 1175 1203.3 36 1 ⅞ 10
46 1300 43.0 49.3 106 1191 1169.9 1226 1254.1 40 1 ⅞ 10
48 1355 44.6 52.5 110 1241 1220.7 1276 1304.9 44 1 ⅞ 10
50 1405 46.2 54.1 114 1294 1271.5 1327 1355.7 44 1 ⅞ 10
52 1455 46.2 55.7 119 1345 1322.3 1378 1409.7 48 1 ⅞ 10
54 1510 47.8 58.9 124 1397 1373.1 1429 1460.5 48 1 ⅞ 10
56 1575 49.3 60.4 133 1451 1423.9 1486 1520.8 40 1 ⅛ 1 11
58 1625 50.9 62.0 137 1502 1474.7 1537 1571.6 44 1 ⅛ 1 11
60 1675 54.1 65.2 143 1553 1525.5 1588 1622.4 44 1 ⅛ 1 11

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:

Materials

  • Carbon Steel: ASTM A105, A350 LF2
  • Stainless Steel: ASTM A182 F304, F316
  • Alloy Steel: ASTM A182 F11, F22
  • Other Materials: Available upon request for special applications.

Features and Benefits

  1. Cost-Effective Design: Optimized for lighter-duty systems compared to Series A.
  2. Reliable Performance: Durable and robust even in challenging industrial environments.
  3. Precision Engineering: Ensures compatibility with large-diameter pipes and compliance with ASME B16.47 standards.
  4. Wide Range of Sizes: Suitable for large-scale piping systems with diameters exceeding 24 inches.

Applications

ASME B16.47 Class 75 Series B flanges are commonly used in:

  • Water Treatment Plants
  • Irrigation and Drainage Systems
  • Oil and Gas Pipelines
  • Petrochemical Industries
  • Power Generation Facilities

Quality Assurance

Haihao Group ensures all products meet the highest quality standards through:

  • Material Testing: Compliance with ASTM and ASME specifications.
  • Dimensional Accuracy: Verified to meet ASME B16.47 standards.
  • NDT Testing: Includes ultrasonic, radiographic, and magnetic particle inspections.
  • Pressure and Leakage Testing: Guarantees reliable performance under operating conditions.

Surface Treatment and Packaging

  • Surface Protection: Options include black paint, anti-rust oil, or galvanization for enhanced durability.
  • Markings: Flanges are stamped with size, pressure rating, material grade, and heat number for traceability.
  • Packaging: Secure wooden crates or pallets to prevent damage during transit.

Why Choose Haihao Group?

  • Industry Expertise: Over 40 years of experience in the manufacturing of piping products.
  • Global Compliance: Products adhere to ASME, ASTM, ISO, and other international standards.
  • Custom Solutions: Tailored to meet unique project requirements.
  • Worldwide Delivery: Efficient logistics to ensure timely delivery.

Contact Haihao Group today for more information about our ASME B16.47 Class 75 Series B flanges or to request a personalized quote. We are committed to delivering quality solutions for your industrial piping needs! Email:sales@haihaogroup.com

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