Standard Fabricated Products
American Packing can
supply pipe flange
gaskets in a broad
range of materials.
Just call us with your
requirements.
3
Pipe Flange Gasket Size Chart
Ring Gaskets
Full Face Gaskets
Ring Gaskets
Full Face Gaskets
150 lb. Flanges
150 lb. Flanges
300 lb. Flanges
300 lb. Flanges
Nom.
ASA Standard
Nom.
ASA Standard
Nom.
ASA Standard
Nom.
ASA Standard
Pipe
B 16.21
Pipe
B 16.21
Pipe
B 16.21
Pipe
B. 16.21
Size
I.D.
O.D.
Size
I.D.
O.D.
Size
I.D.
O.D.
Size
I.D.
O.D.
1/2"
27/32"
1 7/8"
1/2"
27/32"
3 1/2"
1/2"
27/32"
2 1/8"
1/2"
27/32"
3 3/4"
3/4"
1 1/16"
2 1/4"
3/4"
1 1/16"
3 7/8"
3/4"
1 1/16"
2 5/8"
3/4"
1 1/16"
4 5/8"
1"
1 5/16"
2 5/8"
1"
1 5/16"
4 1/4"
1"
1 5/16"
2 7/8"
1"
1 5/16"
4 7/8"
1 1/4"
1 21/32"
3"
1 1/4"
1 21/32"
4 5/8"
1 1/4"
1 21/32"
3 1/4"
1 1/4"
1 21/32"
5 1/4"
1 1/2"
1 29/32"
3 3/8"
1 1/2"
1 29/32"
5"
1 1/2"
1 29/32"
3 3/4"
1 1/2"
1 29/32"
6 1/8"
2"
2 3/8"
4 1/8"
2"
2 3/8"
6"
2"
2 3/8"
4 3/8"
2"
2 3/8"
6 1/2"
2 1/2"
2 7/8"
4 7/8"
2 1/2"
2 7/8"
7"
2 1/2"
2 7/8"
5 1/8"
2 1/2"
2 7/8"
7 1/2"
3"
3 1/2"
5 3/8"
3"
3 1/2"
7 1/2"
3"
3 1/2"
5 7/8"
3"
3 1/2"
8 1/4"
3 1/2"
4"
6 3/8"
3 1/2"
4"
8 1/2"
3 1/2"
4"
6 1/2"
3 1/2"
4"
9"
4"
4 1/2"
6 7/8"
4"
4 1/2"
9"
4"
4 1/2"
7 1/8"
4"
4 1/2"
10"
4 1/2"
5"
7"
4 1/2"
5"
9 1/4"
4 1/2"
5"
7 5/8"
4 1/2"
5"
10 1/2"
5"
5 9/16"
7 3/4"
5"
5 9/16"
10"
5"
5 9/16"
8 1/2"
5"
5 9/16"
11"
6"
6 5/8"
8 3/4"
6"
6 5/8"
11"
6"
6 5/8"
9 7/8"
6"
6 5/8"
12 1/2"
7"
7 5/8"
10"
7"
7 5/8"
12 1/2"
7"
7 5/8"
10 7/8"
7"
7 5/8"
14"
8"
8 5/8"
11"
8"
8 5/8"
13 1/2"
8"
8 5/8"
12 1/8"
8"
8 5/8"
15"
9"
9 5/8"
12 1/2"
9"
9 5/8"
15"
9"
9 5/8"
12 1/8"
9"
9 5/8"
16 1/4"
10"
10 3/4"
13 3/8"
10"
10 3/4"
16"
10"
10 3/4"
14 1/4"
10"
10 3/4"
17 1/2"
12"
12 3/4"
16 1/8"
12"
12 3/4"
19"
12 "
12 3/4"
16 5/8"
12"
12 3/4"
20 1/2"
14"
14"
17 3/4"
14"
14"
21"
14"
14"
19 1/8"
14"
14"
23"
16"
16"
20 1/4"
16"
16"
23 1/2"
16"
16"
21 1/4"
16"
16"
25 1/2"
18"
18"
21 5/8"
18"
18"
25"
18"
18"
23 1/2"
18"
18"
28"
20"
20"
23 7/8"
20"
20"
27 1/2"
20"
20"
25 3/4"
20"
20"
30 1/2"
22"
22"
26"
22"
22"
29 1/2"
22"
21"
27 5/8"
22"
22"
33"
24"
24"
28 1/4"
24"
24"
32"
24"
24"
30 1/2"
24"
24"
36"
26"
26"
30 1/2"
26"
26"
34 1/4"
28"
28"
32 3/4"
28"
28"
36 1/2"
30"
30"
34 3/4"
30"
30"
38 3/4"
32"
32"
37"
32"
32"
41 3/4"
34"
34"
39"
34"
34"
43 3/4"
36"
36"
41 1/4"
36"
36"
46"
38"
38"
43 3/8"
38"
38"
48 3/4"
40"
40"
45 5/8"
40"
40"
50 3/4"
42"
42"
48"
42"
42"
53"
44"
44"
50 1/8"
44"
44"
55 1/4"
46"
46"
52 1/8"
46"
46"
57 1/4"
48"
48"
54 1/2"
48"
48"
59 1/2"
(Continued on Next Page)