Style WR & WRI to ASME B16.20 to suit ASME B16.5 flanges

SPIRALTEC GASKET CO.

For Style WRI, see section for “Inner Ring Dimensions” In accordance with ASME B16.20, Inner Rings are mandatory for the following flange designations:

Class 900- NPS 24 to 48
Class 1500 – NPS 12 to NPS 24
Class 2500 – NPS 4 to NPS 12

Style WR & WRI to ASME B16.20
To Suit ASME B16.50 Flanges
Gasket Dimensions

SPIRALWOUNDdiagram2

Outside Diameter
of Sealing Element
 Over all Gasket size ID (inside sealing ring)
x OD (outer diameter of centering ring)
Nom.
Pipe Size
Class 150/300
400, 600
Class 900/1500
2500
Class
150
Class
300
Class
400
Class
600
Class
900
Class
1500
Class
2500
½
1 ¼
1 ¼
¾ x 1 ⅞
¾ x 2
 
 
¾ x 2 ½
 
¾ x 2 ¾
¾
1 9/16
1 9/16
1 x 2 ¼
1 x 2 ⅝
 
 
1 x 2 ¾
 
1 x 3
1
1 ⅞
1 ⅞
1 ¼ x 2 ⅝
1 ¼ x 2 ⅞
 
 
1 ¼ x 3 ⅛
 
1 ¼ x 3 ⅜
1 ¼
2 ⅜
2 ⅜
1 ⅞ x 3
1 ⅞ x 3 ¼
 
 
1 916 x 3 ½
 
1 916 x 4 ⅛
1 ½
2 ¾
2 ¾
2 ⅛ x 3 ⅜
2 ⅛ x 3 ¾
 
 
1 78 x 3 ⅞
 
1 ⅞ x 4 ⅝
2
3 ⅜
3 ⅜
2 ¾ x 4 ⅛
2 ¾ x 4 ⅜
 
 
2 516 x 5 ⅝
 
2 516 x 5 ¾
2 ½
3 ⅞
3 ⅞
3 ¼ x 4 ⅞
3 ¼ x 5 ⅛
 
 
2 ¾ x 6 ½
 
2 ¾ x 6 ⅝
3
4 ¾
4 ¾
4 x 5 ⅜
4 x 5 ⅞
 
 
3 ¾ x 6 ⅝
3 ⅝ x 6 ⅞
3 ⅝ x 7 ¾
3 ½
5 ¼
5 ¼
4 ½ x 6 ⅜
4 ½ x 6 ½
4 ⅛ x 6 ⅜
 
4 ⅛ x 7 ½
4 ⅛ x 7 ⅜
 
4
5 ⅞
5 ⅞
5 x 6 ⅞
5 x 7 ⅛
4 ¾ x 7
4 ¾ x 7 ⅝
4 ¾ x 8 ⅛
4 ⅝ x 8 ¼
4 ⅝ x 9 ¼
5
7
7
6 ⅛ x 7 ¾
6 ⅛ x 8 ½
5 1316 x 8 ⅜
5 1316 x 9 ½
5 1316 x 9 ¾
5 ⅝ x 10
5 ⅝ x 11
6
8 ¼
8 ¼
7 316 x 8 ¾
7 316 x 9 ⅞
6 ⅞ x 9 ¾
6 ⅞ x 10 ½
6 ⅞ x 11 ⅜
6 ¾ x 11 ⅛
6 ¾ x 12 ½
8
10 ⅜
10 ⅛
9 316 x 11
9 316 x 12 ⅛
8 ⅞ x 12
8 ⅞ x 12 ⅝
8 ¾ x 14 ⅛
8 ½ x 13 ⅞
8 ½ x 15  ¼
10
12 ½
12 ¼
11 316 x 13 ⅜
11 516 x 14 ¼
10 1316 x 14 ⅛
10 1316 x 15 ¾
10 ⅞ x 17 ⅛
10 ½ x 17 ⅛
10 ⅝ x 18 ¾
12
14 ¾
14 ¼
13 ⅜ x 16 ⅛
13 38 x 16 ⅝
12 ⅞ x 16 ½
12 ⅞ x 18
12 ¾ x 19 ⅝
12 ¾ x 20 ½
12 ½ x 21 ⅝
14
16
15 ¾
14 ⅝ x 17 ¾
14 ⅝ x 19 ⅛
14 ¼ x 19
14 ¼ x 19 ⅜
14 x 20 ½
14 ¼ x 22 ¾
 
16
18 ¼
18
16 ⅝ x 20 ¼
16 ⅝ x 21 ¼
16 ¼ x 21 ⅛
16 ¼ x 22 ¼
16 ¼ x 22 ⅝
16 x 25 ¼
 
18
20 ¾
20 ½
18 1116 x 21 ⅝
18 1116 x 23 ½
18 ½ x 23 ⅜
18 ½ x 24 ⅛
18 ¼ x 25 ⅛
18 ¼ x 27 ¾
 
20
22 ¾
22 ½
20 1116 x 23 ⅞
20 1116 x 25 ¾
20 ½ x 25 ½
20 ½ x 26 ⅞
20 ½ x 27 ½
20 ¼ x 29 ¾
 
24
27
26 ¾
24 ¾ x 28  ¼
24 ¾ x 30 ½
24 ¾ x 30 ¼
24 ¾ x 31 ⅛
24 ¾ x 33
24 ¼ x 35 ½
 

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