ASTM CLASS 900 WELDING NECK FLANGES

Item #Nominal Pipe SizeOutside Diameter (O)Thickness (T)Raised Face Diameter (R)Length Thru Hub (Y)Hub Diameter (X)Bore (B)Approximate Weight (lbs)Bolt Circle (C)Number of HolesDiameter of Holes
0H900WNAN 1/2 4.75 0.88 1.38 2.38 1.50 Specified by purchaser 5 3.25 4 0.88
3Q900WNAN 3/4 5.13 1.00 1.69 2.75 1.75 Specified by purchaser 6 3.50 4 0.88
01900WNAN 1 5.88 1.13 2.00 2.88 2.06 Specified by purchaser 9 4.00 4 1.00
1Q900WNAN 1 1/4 6.25 1.13 2.50 2.88 2.50 Specified by purchaser 10 4.38 4 1.00
1H900WNAN 1 1/2 7.00 1.25 2.88 3.25 2.75 Specified by purchaser 13 4.88 4 1.13
02900WNAN 2 8.50 1.50 3.63 4.00 4.13 Specified by purchaser 25 6.50 8 1.00
2H900WNAN 2 1/2 9.63 1.63 4.13 4.06 4.88 Specified by purchaser 36 7.50 8 1.13
03900WNAN 3 9.50 1.50 5.00 4.00 5.00 Specified by purchaser 31 7.50 8 1.00
04900WNAN 4 11.50 1.75 6.19 4.50 6.25 Specified by purchaser 53 9.25 8 1.25
05900WNAN 5 13.75 2.00 7.31 5.00 7.50 Specified by purchaser 86 11.00 8 1.38
06900WNAN 6 15.00 2.19 8.50 5.50 9.25 Specified by purchaser 110 12.50 12 1.25
08900WNAN 8 18.50 2.50 10.63 6.38 11.75 Specified by purchaser 175 15.50 12 1.50
10900WNAN 10 21.50 2.75 12.75 7.25 14.50 Specified by purchaser 260 18.50 16 1.50
12900WNAN 12 24.00 3.13 15.00 7.88 16.50 Specified by purchaser 325 21.00 20 1.50
14900WNAN 14 25.25 3.38 16.25 8.38 17.75 Specified by purchaser 400 22.00 20 1.63
16900WNAN 16 27.75 3.50 18.50 8.50 20.00 Specified by purchaser 495 24.25 20 1.75
18900WNAN 18 31.00 4.00 21.00 9.00 22.25 Specified by purchaser 680 27.00 20 2.00
20900WNAN 20 33.75 4.25 23.00 9.75 24.50 Specified by purchaser 830 29.50 20 2.13
24900WNAN 24 41.00 5.50 27.25 11.50 29.50 Specified by purchaser 1500 35.50 20 2.63