SERIES B

ASME B16.47 Class 400 Series B Welding Neck Flanges

SPECIFICATIONS




All dimensions are in inches
1/4" raised face will be added to the thickness and overall
  length unless otherwise specified
38" thru 60" sizes are the same as Series "A"
Flat face option available
Extra heavy 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 33.50  3.50  28.00  5.88  27.12  0.44  26 Specified
by purchaser
360 30.75  28 1.50 
28 36.00  3.75  30.00  6.25  29.12  0.50  28 Specified
by purchaser
450 33.00  24 1.62 
30 38.25  4.00  32.25  6.69  31.25  0.50  30 Specified
by purchaser
530 35.25  28 1.62 
32 40.75  4.25  34.38  7.06  33.25  0.50  32 Specified
by purchaser
635 37.50  28 1.75 
34 42.75  4.38  36.50  7.38  35.38  0.56  34 Specified
by purchaser
690 39.50  32 1.75 
36 45.50  4.69  38.62  7.88  37.50  0.56  36 Specified
by purchaser
855 42.00  28 1.88