Style WR & WRI to ASME B16-47 Series B

Dimensions for Style WR / WRI per ASME B16.20
To suit ASME B16.47 Series B or API-605 Flanges

 

Spiraltec Gaskets

Class 75
Nom.
Pipe
Size
Inner Ring I.D. Winding Centering Ring Outside Dia.
I.D. O.D.
26
 
26.25
27.000
27.875
28
 
28.250
29.125
29.875
30
 
30.250
31.125
31.875
32
 
32.250
33.125
33.875
34
 
34.250
35.125
35.875
36
 
36.250
37.250
38.312
38
 
 
 
 
40
 
 
 
 
42
 
42.250
43.250
44.312
44
 
 
 
 
46
 
 
 
48
 
48.375
49.500
50.500
50
 
 
 
 
52
 
 
 
 
54
 
54.375
55.625
56.625
56
 
 
 
 
58
 
 
 
 
60
 
60.500
61.750
62.875
 
 
 
 
Class 150
Nom.
Pipe
Size
Inner Ring I.D. Winding Centering Ring Outside Dia.
I.D. O.D.
26
25.750
26.500
27.500
28.562
28
27.750
28.500
29.500
30.562
30
29.750
30.500
31.500
32.562
32
31.750
32.500
33.500
34.688
34
33.750
34.500
35.750
36.812
36
35.750
36.500
37.750
38.875
38
37.750
38.375
39.750
41.125
40
39.750
40.250
41.875
43.125
42
41.750
42.500
43.875
45.125
44
43.750
44.250
45.875
47.125
46
45.750
46.500
48.187
49.437
48
47.750
48.500
50.000
51.437
50
49.750
50.500
52.187
53.437
52
51.750
52.500
54.187
55.437
54
53.750
54.500
56.000
57.625
56
56.000
56.875
58.187
59.625
58
58.187
59.062
60.187
62.187
60
60.437
61.312
62.437
64.187
 
 
 
 
 
NOTE: Gasket dimensions to suit Class 75 flanges are not specified in ASME B16.20

Class 300
Nom.
Pipe
Size
Inner Ring I.D. Winding Centering Ring Outside Dia.
I.D. O.D.
26
25.750
26.500
28.000
30.375
28
27.750
28.500
30.000
32.500
30
29.750
30.500
32.000
34.875
32
31.750
32.500
34.000
37.000
34
33.750
34.500
36.000
39.125
36
35.750
36.500
38.000
41.250
38
38.250
39.750
41.250
43.250
40
40.250
41.750
43.250
45.250
42
42.750
43.750
45.250
47.250
44
44.250
45.750
47.250
49.250
46
46.375
47.875
49.375
51.875
48
48.500
49.750
51.625
53.875
50
49.875
51.875
53.375
55.875
52
51.875
53.875
55.375
57.875
54
53.750
55.250
57.250
60.250
56
56.250
58.250
60.000
62.750
58
58.437
60.437
61.937
65.187
60
61.312
62.562
64.187
67.187
 
 
 
 
 
Class 400
Nom.
Pipe
Size
Inner Ring I.D. Winding Centering Ring Outside Dia.
I.D. O.D.
26
25.750
26.250
27.500
29.375
28
27.625
28.125
29.500
31.500
30
29.625
30.125
31.750
33.750
32
31.500
32.000
33.875
35.875
34
33.500
34.125
35.875
37.875
36
35.375
36.125
38.000
40.250
38
37.500
38.250
40.250
42.250
40
39.375
40.375
42.375
44.375
42
41.375
42.375
44.375
46.375
44
43.500
44.500
46.500
48.500
46
46.000
47.000
49.000
50.750
48
47.500
49.000
51.000
53.000
50
49.500
51.000
53.000
55.250
52
51.500
53.000
55.000
57.250
54
53.250
55.250
57.250
59.750
56
55.250
57.250
59.250
61.750
58
57.250
59.250
61.250
63.750
60
59.750
61.750
63.750
66.250
 
 
 
 
 
NOTE: Gasket dimensions to suit Class 75 flanges are not specified in ASME B16.20.

Class 600
Nom.
Pipe
Size
Inner Ring I.D. Winding Centering Ring Outside Dia.
I.D. O.D.
26
25.375
26.125
28.125
30.125
28
27.000
27.750
29.750
32.250
30
29.625
30.625
32.625
34.625
32
31.250
32.750
34.750
36.750
34
33.500
35.000
37.000
39.250
36
35.500
37.000
39.000
41.250
38
37.500
39.000
41.000
43.500
40
39.750
41.250
43.250
45.500
42
42.000
43.500
45.500
48.000
44
43.750
45.750
47.750
50.000
46
45.750
47.750
49.750
52.250
48
48.000
50.000
52.000
54.750
50
50.000
52.000
54.000
57.000
52
52.000
54.000
56.000
59.000
54
54.250
56.250
58.250
61.250
56
56.250
58.250
60.250
63.500
58
58.000
60.500
62.500
65.500
60
60. 250
62.750
64.750
68.250
 
 
 
 
 
Class 900
Nom.
Pipe
Size
Inner Ring I.D. Winding Centering Ring Outside Dia.
I.D. O.D.
26
26.250
27.250
29.500
33.000
28
28.250
29.250
31.500
35.500
30
31.750
31.750
33.750
37.750
32
33.000
34.000
36.000
40.000
34
35.250
36.250
38.250
42.250
36
36.250
37.250
39.250
44.250
38
39.750
40.750
42.750
47.250
40
41.750
43.250
45.250
49.250
42
43.750
45.250
47.250
51.250
44
45.500
47.500
49.500
53.875
46
48.000
50.000
52.000
56.500
48
50.000
52.000
54.000
58.500
 
 
 
 
 

DIMENSIONS IN INCHES

Note: There are no class 900 flanges NPS 50 and larger. INNER RINGS are mandatory for class 900 flanges, NPS 26 to 48.

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