ANSI B16.1 CLASS 125 Weld Neck Flange

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Product description

What is ANSI B16.1 CLASS 125 Weld Neck Flange

ANSI B16.1 Class 125 Weld Neck Flanges are designed to connect pipes with high integrity and strength, adhering to American National Standards Institute (ANSI) B16.1 standards. These flanges are rated for a pressure class of 125 pounds per square inch (PSI).

Common Materials:
– Cast Iron: ASTM A126 Class B
– Ductile Iron: ASTM A536

Common Dimensions:
– Size Range: 1/2″ to 24″ (DN15-DN600)
– Pressure Rating: Class 125 (125 PSI)
– Flange Facings: Raised Face (RF), Flat Face (FF)

Production Processes:
Manufacturing ANSI B16.1 Class 125 Weld Neck Flanges often involves casting processes. Cast iron or ductile iron materials are melted and poured into molds shaped to create the flange. For weld neck flanges, an additional step involves machining the neck to match the pipe’s diameter for a smooth, strong weld joint.

Applications:
These flanges are commonly used in low-pressure applications across various industries, including plumbing, water supply, irrigation, and low-pressure piping systems in commercial and industrial settings. The weld neck design provides a sturdy connection, ideal for applications where high-pressure and temperature conditions are not a concern.

 

 

 

ANSI B16.1 CLASS 125 Weld Neck Flange

Dimensions of ANSI B16.1 CLASS 125 Weld Neck Flange

* Bore (B2): To be specified by purchaser

Nominal Size Outside Diameter Thickness Raised Face Dia. Diameter At Base * Bore Diameter Bevel LTH Drilling – Bolt Circle Drilling – Hole Diameter Drilling – No. of Holes Weight
(OD) (T) (R) (X) (B2) (H) (L2) (BC) (lbs)
26 34.25 2 29.5 28.5 * 26 5 31.75 1.38 24 265
28 36.5 2.06 31.5 30.75 * 28 5.06 34 1.38 28 295
30 38.75 2.13 33.75 32.75 * 30 5.13 36 1.38 28 340
32 41.75 2.25 36 35 * 32 5.25 38.5 1.63 28 410
34 43.75 2.31 38 37 * 34 5.31 40.5 1.63 32 440
36 46 2.38 40.25 39.25 * 36 5.38 42.75 1.63 32 495
38 48.75 2.38 42.25 41.75 * 38 5.38 45.25 1.63 32 570
40 50.75 2.5 44.25 43.75 * 40 5.5 47.25 1.63 36 620
42 53 2.63 47 46 * 42 5.63 49.5 1.63 36 710
44 55.25 2.63 49 48 * 44 5.63 51.75 1.63 40 750
46 57.25 2.69 51 50 * 46 5.68 53.75 1.63 40 800
48 59.5 2.75 53.5 52.25 * 48 5.75 56 1.63 44 870
50 61.75 2.75 55.5 54.25 * 50 5.75 58.25 1.88 44 900
52 64 2.88 57.5 56.5 * 52 5.88 60.5 1.88 44 1000
54 66.25 3 59.75 58.75 * 54 6 62.75 1.88 44 1100
60 73 3.13 66 65.25 * 60 6.13 69.25 1.88 52 1350
66 80 3.38 – 71.5 * 66 6.38 76 1.88 52 1775
72 86.5 3.5 – 78.5 * 72 6.5 82.5 1.88 60 2100
84 99.75 3.88 – 90.5 * 84 6.88 95.5 2.13 64 2825
96 113.25 4.25 – 102.75 * 96 7.25 108.5 2.44 68 3800

 

Notes
Dimensions are in inches.
ANSI B16.1 is a gray iron pipe flange and fitting specification.
Steel flanges are occasionally produced to mate up with Class 125 and Class 250 valves
These flange dimensions are provided for reference even though specification does not cover steel.
These flanges are typically supplied with a flat face.

Sino Special Metal Supply offers a range of ANSI B16.1 Class 125 Weld Neck Flanges suitable for various industrial applications. These flanges comply with ANSI standards, ensuring proper fitment and reliability in low-pressure systems. Customers are welcome to inquire about specific material requirements, sizes, or customization options to meet their project needs.

 

 

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