Style WR & WRI to ASME B16-47 Series A

Dimensions for Style WR / WRI per ASME B16.20
To suit ASME B16.47 Series A or MSS-SP-44 Flanges

 

SPIRALWOUNDdiagram2

Class 150
Nom.
Pipe
Size
Inner Ring I.D. Winding Centering Ring Outside Dia.
I.D. O.D.
22
 
22.750
24.000
26.000
26
25.750
26.500
27.750
30.500
28
27.750
28.500
29.750
32.750
30
29.750
30.500
31.750
34.750
32
31.750
32.500
33.875
37.000
34
33.750
34.500
35.875
39.000
36
35.750
36.500
38.125
41.250
38
37.750
38.500
40.125
43.750
40
39.750
40.500
42.125
45.750
42
41.750
42.500
44.250
48.000
44
43.750
44.500
46.375
50.250
46
45.750
46.500
48.375
52.250
48
47.750
48.500
50.375
54.500
50
49.750
50.500
52.500
56.500
52
51.750
52.500
54.500
58.750
54
53.500
54.500
56.500
61.000
56
55.500
56.500
58.500
63.250
58
57.500
58.500
60.500
65.500
60
59.500
60.500
62.500
67.500
Class 300
Nom.
Pipe
Size
Inner Ring I.D. Winding Centering Ring Outside Dia.
I.D. O.D.
22
 
22.750
24.750
27.750
26
25.750
27.000
29.000
32.875
28
27.750
29.000
31.000
35.375
30
29.750
31.250
33.250
37.500
32
31.750
33.500
35.500
39.625
34
33.750
35.500
37.500
41.625
36
35.750
37.625
39.625
44.000
38
37.500
38.500
40.000
41.500
40
39.500
40.250
42.125
43.875
42
41.500
42.250
44.125
45.875
44
43.500
44.500
46.500
48.000
46
45.625
46.375
48.375
50.125
48
47.625
48.625
50.625
52.125
50
49.000
51.000
53.000
54.250
52
52.000
53.000
55.000
56.250
54
53.250
55.250
57.250
58.750
56
55.250
57.250
59.250
60.750
58
57.000
59.500
61.500
62.750
60
60.000
61.500
63.500
64.750
The above style WR gasket dimensions are also suitable for NPS 26 to 48 class 150 and NPS 26 to 36 class 300 BS-3293 Flanges.

Class 400
Nom.
Pipe
Size
Inner Ring I.D. Winding Centering Ring Outside Dia.
I.D. O.D.
22
 
22.750
24.750
27.625
26
26.000
27.000
29.000
32.750
28
28.000
29.000
31.000
35.125
30
29.750
31.250
33.250
37.250
32
32.000
33.500
35.500
39.500
34
34.000
35.500
37.500
41.500
36
36.125
37.625
39.625
44.000
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
Class 600
Nom.
Pipe
Size
Inner Ring I.D. Winding Centering Ring Outside Dia.
I.D. O.D.
22
 
22.750
24.750
28.875
26
25.500
27.000
29.000
34.125
28
27.500
29.000
31.000
36.000
30
29.750
31.250
33.250
38.250
32
32.000
33.500
35.500
40.250
34
34.000
35.500
37.500
42.250
36
36.125
37.625
39.625
44.500
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
The above style WR gasket dimensions are also suitable for NPS 26 to 36 class 400 and 600 BS-3293 Flanges.

Class 900
Nom.
Pipe
Size
Inner Ring I.D. Winding Centering Ring Outside Dia.
I.D. O.D.
22
 
 
 
 
26
26.000
27.000
29.000
34.750
28
28.000
29.000
31.000
37.250
30
30.250
31.250
33.250
39.750
32
32.000
33.500
35.500
42.250
34
34.000
35.500
37.500
44.750
36
36.250
37.750
39.750
47.250
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
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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