SERIES B

ASME B16.47 Class 900 Series B Welding Neck Flanges

SPECIFICATIONS




All dimensions are in inches
1/4" raised face will be added to the thickness unless
  otherwise specified
38" thru 60" sizes are the same as Series "A"
Flat face option available
Nominal
Pipe Size
Outside Diameter  Minimum
Thickness 
Raised Face
Diameter
Length
Thru Hub
Hub
Diameter 
Minimum
Fillet Radius 
Top
of Hub
Bore Approximate Weight  Bolt
Circle
Number
of Holes
Diameter
of Holes
(O) (T)  (R)  (Y) (X)  (r) (A)  (B) (lbs)  (C)
26 40.25  5.31  30.00  10.19  29.25  0.44  26 Specified
by purchaser
1050 35.50  20 2.62 
28 43.50  5.81  32.25  10.88  31.38  0.50  28 Specified
by purchaser
1520 38.25  20 2.88 
30 46.50  6.12  34.50  11.38  33.50  0.50  30 Specified
by purchaser
1820 40.75  20 3.12 
32 48.75  6.31  36.50  11.94  35.75  0.50  32 Specified
by purchaser
2065 43.00  20 3.12 
34 51.75  6.75  39.00  12.56  37.88  0.56  34 Specified
by purchaser
2450 45.50  20 3.38 
36 53.00  6.81  40.50  12.81  40.00  0.56  36 Specified
by purchaser
2520 47.25  24 3.12