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

2024-12-12 15:36:30 Hits:107 American Standards / Product Standards

The ASME B16.47 Class 400 Series B Flange is designed to meet the needs of large-diameter piping systems in demanding applications. These flanges provide reliable performance under high pressure and are available in two primary types: weld neck flanges (WN) and blind flanges (BL).

Key Specifications

Standard Compliance:

Manufactured according to ASME B16.47 standards.

Designed to meet Class 400 pressure ratings.

Flange Types:

Weld Neck Flanges: Designed with a long hub for welding to the pipe, reducing stress and ensuring structural integrity.
Blind Flanges: Used to seal the ends of piping systems, providing a tight and secure closure.

Material Options:

Carbon Steel: ASTM A105, A350 LF2
Stainless Steel: ASTM A182 F304/F316
Alloy Steel: ASTM A182 F11/F22

Size Range: Nominal Pipe Sizes (NPS): 26 to 36 inches

Sealing Face Options:

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

Dimensions of ASME B16.47 Class 400 Series B Flange:

ASME B16.47 Class 400 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
Nominal Pipe Size	O	WNF	Blind	Y	X[Note(2)]	A	R	Diam. of Bolt Circle	No. of Bolt Holes	Diam. of Bolt Hole,in.	Diam. of Bolt,in.	r₁
26	850	88.9	88.9	149	689	660.4	711	781.0	28	1 ½	1 ⅜	11
28	915	95.3	95.3	159	740	711.2	762	838.2	24	1 ⅝	1 ½	13
30	970	101.6	101.6	170	794	762.0	819	895.4	28	1 ⅝	1 ½	13
32	1035	108.0	108.0	179	845	812.8	873	952.5	28	1 ¾	1 ⅝	13
34	1085	111.2	111.2	187	899	863.6	927	1003.3	32	1 ¾	1 ⅝	14
36	1155	119.1	128.6	200	952	914.4	981	1066.8	28	1 ⅞	1 ¾	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.
(c)Dimensions for Classes 400,600,and 900 NPS 38 and larger for Series B flanges are the same as for the Series A flanges.
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:

Features and Benefits

High Strength: Engineered to withstand Class 400 pressure, ensuring safety and durability.

Sealing Performance: Precision-machined sealing faces ensure tight and leak-proof connections.

Stress Reduction: Weld neck flanges reduce stress concentration at the flange-to-pipe connection, enhancing system longevity.

Versatility: Available in multiple materials, sizes, and sealing faces for various applications.

Corrosion Resistance: Materials and surface treatments available to meet specific environmental and operational needs.

Applications

The ASME B16.47 Class 400 Series B Flanges are ideal for:

Petrochemical Plants
Oil and Gas Pipelines
Power Generation Facilities
Marine Engineering
High-Pressure Steam Systems

Quality Assurance

Manufacturing Standards:Fully compliant with ASME B16.47 specifications.

Testing and Certification:

Dimensional Inspection
Pressure Testing
Ultrasonic Testing (UT), Magnetic Particle Testing (MT), or Radiographic Testing (RT) as required.

Documentation:

Material Test Reports (MTRs)
EN 10204 3.1 or 3.2 certificates upon request

Why Choose Haihao Group?

Haihao Group is a trusted name in piping solutions, offering a full range of ASME B16.47 class 400 Series B weld neck and blind flanges. With over four decades of expertise, we deliver precision-engineered products that meet the highest industry standards.

ASME B16.47 Series B flange

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