ASME/ANSI B16.5 600 Class Weld Neck Flange/Standards, Dimensions & Weight

Weld Neck Flange is flanges that designed to be joined to a piping system by butt welding. This kind of flange include lots of specification, weld neck flange is expensive because of its long neck and cost of people for contact WN flange with pipeline or fitting, but is preferred for high stress applications. The necks, or hubs, transmits stresses to the pipeline. The gradual transition of thickness from the base of the hub to the wall thickness at the butt weld provides important reinforcement of the Weld Neck flange. The bore of Weld-Neck flange matches bore of the pipeline, reducing turbulence and erosion.

  • Our company is a manufacturer of ASME/ANSI B16.5 600LB WN Flange, which is precisely engineered in accordance with international quality standards. For detailed dimensions of 150 Class Weld Neck flange, kindly check the table below. Also, you can download the datasheet
600 Class Weld Neck Flange Drawing ASME/ANSI B16.5
Product Weld Neck Flange
Pressure Rating 600 lb, 600 Class
Dimensional Specification ASME/ANSI B16.5
Size 1/2″ to 24″
Surface Treatment Anti-rust Oil, Paint, Zinc, Hot Dipped Galvanized
Grades 304, 304L, 316L, 321, 347, 904L, Duplex, Carbon Steel, Nickel Alloys
Test Certificates As per EN 10204 3.1
Inspection Videos, Pictures, Inspection Report with Goods
Pipe Normal Diam. O.D. Flange Thk. Of Flange Min Diam.
of
Hub
Diameter of Raised Face Hub
Diam.
Chamfer
of W.N
Length Hub Diam.
of Bolt
Circle
Diam.
of Bolt
Holes
Number
of Bolts
Diam. of
Bolts
(inch)
Approx. Weight
inch dn O C X G A Y BC BH BN BD KG/PCS LB/PCS
1/2″ 15 95.5 14.2 38.1 35.1 22.4 52.3 66.5 15.7 4 1/2″ 0.9 2
3/4″ 20 117. 5 15.7 47.8 42.9 25.4 57.2 82.6 19.1 4 5/8″ 1.6 3.5
1″ 25 124. 0 17.5 53.8 50.8 26.9 62 88.9 19.1 4 5/8″ 1.9 4.2
1-1/4″ 32 133. 5 20.6 63.5 63.5 28.4 66.5 98.6 19.1 4 5/8″ 2.6 5.8
1-1/2″ 40 155. 5 22.4 69.9 73.2 31.8 69.9 114.3 22.4 4 3/4″ 3.6 8
2″ 50 165. 0 25.4 84.1 91.9 36.6 73.2 127 19.1 8 5/8″ 4.7 10.4
2-1/2″ 65 190. 5 28.4 100.1 104.6 41.1 79.2 149.4 22.4 8 3/4″ 4.8 15
3″ 80 209. 5 31.8 117.3 127 46 82.6 168.1 22.4 8 3/4″ 8.7 19.3
3-1/2″ 90 228. 5 35.1 133.4 139.7 49.3 85.9 184.2 25.4 8 7/8″ 11.6 25.5
4″ 100 273. 0 38.1 152.4 157.2 53.8 101. 6 215.9 25.4 8 7/8″ 18.4 40.5
5″ 125 330. 0 44.5 189 185.7 60.5 114. 3 266.7 28.4 8 1″ 31 68
6″ 150 355. 5 47.8 222.3 215.9 66.5 117. 3 292.1 28.4 12 1″ 37 81.4
8″ 200 419. 0 55.6 273.1 269.7 76.2 133. 4 349.3 31.8 12 1 1/8″ 54.5 120
10″ 250 508. 0 63.5 342.9 323.9 85.9 152. 4 431.8 35.1 16 1 1/4″ 98.5 195
12″ 300 559. 0 66.5 400.1 381 91.9 155. 4 489 35.1 20 1 1/4″ 105 231
14″ 350 603. 5 69.9 431.8 412.8 93.7 165. 1 527.1 38.1 20 1 3/8″ 150 330
16″ 400 686. 0 76.2 495.3 469.9 106.4 177. 8 603.3 41.1 20 1 1/2″ 177 390
18″ 450 743. 0 82.6 546.1 533.4 117.3 184. 2 654.1 44.5 20 1 5/8″ 228 503
20″ 500 813. 0 88.9 609.6 584.2 127 190. 5 723.9 44.5 24 1 5/8″ 285 628
24″ 600 940. 0 101.6 717.6 692.2 139.7 203. 2 838.2 50.8 24 1 7/8″ 372 820

Note:
1) 7 mm raised face regularly furnished above Class 400 unless otherwise ordered.