Welding Neck Flange

ANSI/ASME B16.5 CLASS 900 WELDING NECK FLANGE

SPECIFICATIONS




▪  All dimensions are in inches
▪  These flanges will be furnished with a 1/4" raised face
   unless otherwise specified
▪  Flat face option available
▪  Standard Bore will be furnished unless otherwise specified
Nominal
Pipe Size		 Outside
Diameter 		 Thickness  Raised Face
Diameter		 Length
Thru Hub		 Hub
Diameter 		 Bore Approximate 
Weight 		 Bolt Circle Number
of Holes		 Diameter
of Holes
(O) (T)  (R)  (Y) (X)  (B) (lbs)  (C)
1/2 4.75 0.88 1.38 2.38 1.50 Specified by
purchaser		 5 3.25 4 0.88 
3/4 5.13 1.00 1.69 2.75 1.75 Specified by
purchaser		 6 3.50 4 0.88 
1 5.88 1.13 2.00 2.88 2.06 Specified by
purchaser		 9 4.00 4 1.00 
1 1/4 6.25 1.13 2.50 2.88 2.50 Specified by
purchaser		 10 4.38 4 1.00 
1 1/2 7 1.25 2.88 3.25 2.75 Specified by
purchaser		 13 4.88 4 1.13 
2 8.5 1.50 3.63 4 4.13 Specified by
purchaser		 25 6.50 8 1.00 
2 1/2 9.63 1.63 4.13 4.06 4.88 Specified by
purchaser		 36 7.50 8 1.13 
3 9.50 1.50 5.00 4 5.00 Specified by
purchaser		 31 7.50 8 1.00 
4 11.50 1.75 6.19 4.5 6.25 Specified by
purchaser		 53 9.25 8 1.25 
5 13.75 2.00 7.31 5 7.50 Specified by
purchaser		 86 11.00 8 1.38 
6 15.00 2.19 8.50 5.5 9.25 Specified by
purchaser		 110 12.50 12 1.25 
8 18.5 2.50 10.63 6.38 11.75 Specified by
purchaser		 175 15.50 12 1.50 
10 21.5 2.75 12.75 7.25 14.50 Specified by
purchaser		 260 18.5 16 1.50 
12 24.00 3.13 15.00 7.88 16.50 Specified by
purchaser		 325 21.00 20 1.50 
14 25.25 3.38 16.25 8.38 17.75 Specified by
purchaser		 400 22.00 20 1.63 
16 27.75 3.50 18.5 8.5 20.00 Specified by
purchaser		 495 24.25 20 1.75 
18 31.00 4.00 21.00 9 22.25 Specified by
purchaser		 680 27.00 20 2.00 
20 33.75 4.25 23.00 9.75 24.50 Specified by
purchaser		 830 29.50 20 2.13 
24 41.00 5.50 27.25 11.5 29.50 Specified by
purchaser		 1500 35.50 20 2.63