Home / Dimensions for Spiral Wound Semi-Metallic Gaskets

Dimensions for Spiral Wound Semi-Metallic Gaskets [including Lamons Style WR (no inner ring) and WRI (with inner ring), ignore Inner Ring Dimension for Style WR]

Inner Ring Winding Guide Ring
Nominal Pipe Size (NPS) Inside Diameter (in) Inside Diameter (in) Outside Diameter (in) Outside Diameter (in)
Class 150 1/4 0.50 0.88 1.75
1/2 0.56 0.75 1.25 1.88
3/4 0.81 1.00 1.56 2.25
1 1.06 1.25 1.88 2.63
1-1/4 1.50 1.88 2.38 3.00
1-1/2 1.75 2.13 2.75 3.38
2 2.19 2.75 3.38 4.13
2-1/2 2.62 3.25 3.88 4.88
3 3.19 4.00 4.75 5.38
3-1/2 3.50 4.50 5.25 6.38
4 4.19 5.00 5.88 6.88
5 5.19 6.13 7.00 7.75
6 6.19 7.19 8.25 8.75
8 8.50 9.19 10.38 11.00
10 10.56 11.31 12.50 13.38
12 12.50 13.38 14.75 16.13
14 13.75 14.63 16.00 17.75
16 15.75 16.63 18.25 20.25
18 17.69 18.69 20.75 21.63
20 19.69 20.69 22.75 23.88
24 23.75 24.75 27.00 28.25
Class 300 1/4 0.50 0.88 1.75
1/2 0.56 0.75 1.25 2.13
3/4 0.81 1.00 1.56 2.63
1 1.06 1.25 1.88 2.88
1-1/4 1.50 1.88 2.38 3.25
1-1/2 1.75 2.13 2.75 3.75
2 2.19 2.75 3.38 4.38
2-1/2 2.62 3.25 3.88 5.13
3 3.19 4.00 4.75 5.88
3-1/2 3.50 4.50 5.25 6.50
4 4.19 5.00 5.88 7.13
5 5.19 6.13 7.00 8.50
6 6.19 7.19 8.25 9.88
8 8.50 9.19 10.38 12.13
10 10.56 11.31 12.50 14.25
12 12.50 13.38 14.75 16.63
14 13.75 14.63 16.00 19.13
16 15.75 16.63 18.25 21.25
18 17.69 18.69 20.75 23.50
20 19.69 20.69 22.75 25.75
24 23.75 24.75 27.00 30.50
Class 400 1/4 0.50 0.88 1.75
1/2 0.56 0.75 1.25 2.13
3/4 0.81 1.00 1.56 2.63
1 1.06 1.25 1.88 2.88
1-1/4 1.50 1.88 2.38 3.25
1-1/2 1.75 2.13 2.75 3.75
2 2.19 2.75 3.38 4.38
2-1/2 2.62 3.25 3.88 5.13
3 3.19 4.00 4.75 5.88
3-1/2 3.50 4.13 5.25 6.38
4 4.04 4.75 5.88 7.00
5 5.05 5.81 7.00 8.38
6 6.10 6.88 8.25 9.75
8 8.10 8.88 10.38 12.00
10 10.05 10.81 12.50 14.13
12 12.10 12.88 14.75 16.50
14 13.50 14.25 16.00 19.00
16 15.35 16.25 18.25 21.13
18 17.25 18.50 20.75 23.38
20 19.25 20.50 22.75 25.50
24 23.25 24.75 27.00 30.25
Class 600 1/4 0.50 0.88 1.75
1/2 0.56 0.75 1.25 2.13
3/4 0.81 1.00 1.56 2.63
1 1.06 1.25 1.88 2.88
1-1/4 1.50 1.88 2.38 3.25
1-1/2 1.75 2.13 2.75 3.75
2 2.19 2.75 3.38 4.38
2-1/2 2.62 3.25 3.88 5.13
3 3.19 4.00 4.75 5.88
3-1/2 3.50 4.13 5.25 6.38
4 4.04 4.75 5.88 7.63
5 5.05 5.81 7.00 9.50
6 6.10 6.88 8.25 10.50
8 8.10 8.88 10.38 12.63
10 10.05 10.81 12.50 15.75
12 12.10 12.88 14.75 18.00
14 13.50 14.25 16.00 19.13
16 15.75 16.63 18.25 19.38
18 17.25 18.50 20.75 24.13
20 19.25 20.50 22.75 26.88
24 23.25 24.75 27.00 31.13
Class 900 1/4
1/2 0.56 0.75 1.25 2.50
3/4 0.81 1.00 1.56 2.75
1 1.06 1.25 1.88 3.13
1-1/4 1.31 1.56 2.38 3.50
1-1/2 1.63 1.88 2.75 3.88
2 2.06 2.31 3.38 5.63
2-1/2 2.50 2.75 3.88 6.50
3 3.10 3.75 4.75 6.63
3-1/2 3.50 4.13 5.25 7.50
4 4.04 4.75 5.88 8.13
5 5.05 5.81 7.00 9.75
6 6.10 6.88 8.25 11.38
8 7.75 8.75 10.13 14.13
10 9.69 10.88 12.25 17.13
12 11.50 12.75 14.50 19.63
14 12.63 14.00 15.75 20.50
16 14.75 16.25 18.00 22.63
18 16.75 18.25 20.50 25.13
20 19.00 20.50 22.50 27.50
24 23.25 24.75 26.75 33.00
Class 1500 1/4
1/2 0.56 0.75 1.25 2.50
3/4 0.81 1.00 1.56 2.75
1 1.06 1.25 1.88 3.13
1-1/4 1.31 1.56 2.38 3.50
1-1/2 1.63 1.88 2.75 3.88
2 2.06 2.31 3.38 5.63
2-1/2 2.50 2.75 3.88 6.50
3 3.10 3.63 4.75 6.88
3-1/2 3.50 4.13 5.25 7.38
4 3.85 4.63 5.88 8.25
5 4.90 5.63 7.00 10.00
6 5.80 6.75 8.25 11.13
8 7.75 8.50 10.13 13.88
10 9.69 10.50 12.25 17.13
12 11.50 12.75 14.50 20.50
14 12.63 14.25 15.75 22.75
16 14.50 16.00 18.00 25.25
18 16.75 18.25 20.50 27.75
20 18.75 20.25 22.50 29.75
24 22.75 24.25 26.75 35.50
Class 2500 1/4
1/2 0.56 0.75 1.25 2.75
3/4 0.81 1.00 1.56 3.00
1 1.06 1.25 1.88 3.38
1-1/4 1.31 1.56 2.38 4.13
1-1/2 1.63 1.88 2.75 4.63
2 2.06 2.31 3.38 5.75
2-1/2 2.50 2.75 3.88 6.63
3 3.10 3.63 4.75 7.75
3-1/2 3.50
4 3.85 4.63 5.88 9.25
5 4.90 5.63 7.00 11.00
6 5.80 6.75 8.25 12.50
8 7.75 8.50 10.13 15.25
10 9.69 10.63 12.25 18.75
12 11.50 12.50 14.50 21.63



Series A

Inner Ring Winding Guide Ring
Nominal Pipe Size (NPS) Inside Diameter (in) Inside Diameter (in) Outside Diameter (in) Outside Diameter (in)
Class 150 22 22.75 24.00 26.00
26 25.75 26.50 27.75 30.50
28 27.75 28.50 29.75 32.75
30 29.75 30.50 31.75 34.75
32 31.75 32.50 33.88 37.00
34 33.75 34.50 35.88 39.00
36 35.75 36.50 38.13 41.25
38 37.75 38.50 40.13 43.75
40 39.75 40.50 42.13 45.75
42 41.75 42.50 44.25 48.00
44 43.75 44.50 46.38 50.25
46 45.75 46.50 48.38 52.25
48 47.75 48.50 50.38 54.50
50 49.75 50.50 52.50 56.50
52 51.75 52.50 54.50 58.75
54 53.50 54.50 56.50 61.00
56 55.50 56.50 58.50 63.25
58 57.50 58.50 60.50 65.50
60 59.50 60.50 62.50 67.50
Class 300 22 22.75 24.75 27.75
26 25.75 27.00 29.00 32.88
28 27.75 29.00 31.00 35.38
30 29.75 31.25 33.25 37.50
32 31.75 33.50 35.50 39.63
34 33.75 35.50 37.50 41.63
36 35.75 37.63 39.63 44.00
38 37.50 38.50 40.00 41.50
40 39.50 40.25 42.13 43.88
42 41.50 42.25 44.13 45.88
44 43.50 44.50 46.50 48.00
46 45.38 46.38 48.38 50.13
48 47.63 48.63 50.63 52.13
50 49.00 51.00 53.00 54.25
52 52.00 53.00 55.00 56.25
54 53.25 55.25 57.25 58.75
56 55.25 57.25 59.25 60.75
58 57.00 59.50 61.50 62.75
60 60.00 61.50 63.50 64.75
Class 400 22 22.75 24.75 27.63
26 26.00 27.00 29.00 32.75
28 28.00 29.00 31.00 35.13
30 29.75 31.25 33.25 37.25
32 32.00 33.50 35.50 39.50
34 34.00 35.50 37.50 41.50
36 36.13 37.63 39.63 44.00
38 37.50 38.25 40.25 42.25
40 39.38 40.38 42.38 44.38
42 41.38 42.38 44.38 46.38
44 43.50 44.50 46.50 48.50
46 46.00 47.00 49.00 50.75
48 47.50 49.00 52.00 53.00
50 49.50 51.00 53.00 55.25
52 51.50 53.00 55.00 57.25
54 53.25 55.25 57.25 59.75
56 55.25 57.25 59.25 61.75
58 57.25 59.25 61.25 63.75
60 59.75 61.75 63.75 66.25
Class 600 22 22.75 24.75 28.88
26 25.50 27.00 29.00 34.13
28 27.50 29.00 31.00 36.00
30 29.75 31.25 33.25 38.25
32 32.00 33.50 35.50 40.25
34 34.00 35.50 37.50 42.25
36 36.13 37.63 39.63 44.50
38 37.50 39.00 41.00 43.50
40 39.75 41.25 43.25 45.50
42 42.00 43.50 45.50 48.00
44 43.75 45.75 47.75 50.00
46 45.75 47.75 49.75 52.25
48 48.00 50.00 52.00 54.75
50 50.00 52.00 54.00 57.00
52 52.00 54.00 56.00 59.00
54 54.25 56.25 58.25 61.25
56 56.25 58.25 60.25 63.50
58 58.00 60.50 62.50 65.50
60 60.25 62.75 64.75 68.25
Class 900 22 24.25 27.00 33.00
26 26.00 27.00 29.00 34.75
28 28.00 29.00 31.00 37.25
30 30.25 31.25 33.25 39.75
32 32.00 33.50 35.50 42.25
34 34.00 35.50 37.50 44.75
36 36.25 37.75 39.75 47.25
38 39.75 40.75 42.75 47.25
40 41.75 43.25 45.25 49.25
42 43.75 45.25 47.25 51.25
44 45.50 47.50 49.50 53.88
46 48.00 50.00 52.00 56.50
48 50.00 52.00 54.00 58.50

Series B

Inner Ring Winding Guide Ring
Nominal Pipe Size (NPS) Inside Diameter (in) Inside Diameter (in) Outside Diameter (in) Outside Diameter (in)
Class 150 26 25.75 26.50 27.50 28.56
28 27.75 28.50 29.50 30.56
30 29.75 30.50 31.50 32.56
32 31.75 32.50 33.50 34.69
34 33.75 34.50 35.75 36.81
36 35.75 36.50 37.75 38.88
38 37.75 38.38 39.75 41.13
40 39.75 40.25 41.88 43.13
42 41.75 42.50 43.88 45.13
44 43.75 44.25 45.88 47.13
46 45.75 46.50 48.19 49.44
48 47.75 48.50 50.00 51.44
50 49.75 50.50 52.19 53.44
52 51.75 52.50 54.19 55.44
54 53.75 54.50 56.00 57.63
56 56.00 56.88 58.19 59.63
58 58.19 59.08 60.19 62.19
60 60.44 61.31 62.44 64.19
Class 300 26 25.75 26.50 28.00 30.38
28 27.75 28.50 30.00 32.50
30 29.75 30.50 32.00 34.88
32 31.75 32.50 34.00 37.00
34 33.75 34.50 36.00 39.13
36 35.75 36.50 38.00 41.25
38 38.25 39.75 41.25 43.25
40 40.25 41.75 43.25 45.25
42 42.75 43.75 45.25 47.25
44 44.25 45.75 47.25 49.25
46 46.38 47.88 N/A 51.88
48 45.50 49.75 51.63 53.88
50 49.88 51.88 53.38 55.88
52 51.88 53.88 55.38 57.88
54 53.75 55.25 57.25 60.25
56 56.25 58.25 60.00 62.75
58 58.44 60.44 61.94 65.19
60 61.31 62.56 64.19 67.19
Class 400 26 25.75 26.25 27.50 29.38
28 27.63 28.13 29.50 31.50
30 29.63 30.13 31.75 33.75
32 31.50 32.00 33.88 35.88
34 33.50 34.13 35.88 37.88
36 35.38 36.13 38.00 40.25
38 37.50 38.25 40.25 42.25
40 39.38 40.38 42.38 44.38
42 41.38 42.38 44.38 46.38
44 43.50 44.50 46.50 48.50
46 46.00 47.00 49.00 50.75
48 47.50 49.00 51.00 53.00
50 49.50 51.00 53.00 55.25
52 51.50 53.00 55.00 57.25
54 53.25 55.25 57.25 59.75
56 55.25 57.25 59.25 61.75
58 57.25 59.25 61.25 63.75
60 59.75 61.75 63.75 66.25
Class 600 26 25.38 26.13 28.13 30.13
28 27.00 27.75 29.75 32.25
30 29.63 30.63 32.63 34.63
32 31.25 32.75 34.75 36.75
34 33.50 35.00 37.00 39.25
36 35.50 37.00 39.00 41.25
38 37.50 39.00 41.00 43.50
40 39.75 41.25 43.25 45.50
42 42.00 43.50 45.50 48.00
44 43.75 45.75 47.75 50.00
46 45.75 47.75 49.75 52.25
48 48.00 50.00 52.00 54.75
50 50.00 52.00 54.00 57.00
52 52.00 54.00 56.00 59.00
54 54.25 56.25 58.25 61.25
56 56.25 58.25 60.25 63.50
58 58.00 60.50 62.50 65.50
60 60.25 62.75 64.75 68.25
Class 900 26 26.25 27.25 29.50 33.00
28 28.25 29.25 31.50 35.50
30 30.75 31.75 33.75 37.75
32 33.00 34.00 36.00 40.00
34 35.25 36.25 38.25 42.25
36 36.25 37.25 39.25 44.25
38 39.75 40.75 42.75 47.25
40 41.75 43.25 45.25 49.25
42 43.75 45.25 47.25 51.25
44 45.50 47.50 49.50 53.88
46 48.00 50.00 52.00 56.50
48 50.00 52.00 54.00 58.50