Dimensions for ASME B16.20
Nominal
150 lb
(API 601)
400 lb
600 lb
900 lb
1500 lb
2500 lb
Pipe Size
Filler
(NPS)
O.D.
I.D.
O.D.
I.D.
O.D.
I.D.
O.D.
I.D.
O.D.
I.D.
O.D.
I.D.
O.D.
I.D.
O.D.
1/4"
7/8"
1/2"
1-3/4"
1/2"
1-3/4"
1/2"
1-3/4"
1/2"
1-3/4"
---
---
---
---
---
---
1/2"
1-1/4"
3/4"
1-7/8"
3/4"
2-1/8"
3/4"
2-1/8"
3/4"
2-1/8"
3/4"
2-1/2"
3/4"
2-1/2"
3/4"
2-3/4"
3/4"
1-9/16"
1"
2-1/4"
1"
2-5/8"
1"
2-5/8"
1"
2-5/8"
1"
2-3/4"
1"
2-3/4"
1"
3"
1"
1-7/8"
1-1/4"
2-5/8"
1-1/4"
2-7/8"
1-1/4"
2-7/8"
1-1/4"
2-7/8"
1-1/4"
3-1/8"
1-1/4"
3-1/8"
1-1/4"
3-3/8"
1-1/4"
2-3/8"
1-7/8"
3"
1-7/8"
3-1/4"
1-7/8"
3-1/4"
1-7/8"
3-1/4"
1-9/16"
3-1/2"
1-9/16"
3-1/2"
1-9/16"
4-1/8"
1-1/2"
2-3/4"
2-1/8"
3-3/8"
2-1/8"
3-3/4"
2-1/8"
3-3/4"
2-1/8"
3-3/4"
1-7/8"
3-7/8"
1-7/8"
3-7/8"
1-7/8"
4-5/8"
2"
3-3/8"
2-3/4"
4-1/8"
2-3/4"
4-3/8"
2-3/4"
4-3/8"
2-3/4"
4-3/8"
2-5/16"
5-5/8"
2-5/16"
5-5/8"
2-5/16"
5-3/4"
2-1/2"
3-7/8"
3-1/4"
4-7/8"
3-1/4"
5-1/8"
3-1/4"
5-1/8"
3-1/4"
5-1/8"
2-3/4"
6-1/2"
2-3/4"
6-1/2"
2-3/4"
6-5/8"
3"
4-3/4"
4"
5-3/8"
4"
5-7/8"
4"
5-7/8"
4"
5-7/8"
3-3/4"
6-5/8"
3-5/8"
6-7/8"
3-5/8"
7-3/4"
3-1/2"
5-1/4"
4-1/2"
6-3/8"
4-1/2"
6-1/2"
4-1/8"
6-3/8"
4-1/8"
6-3/8"
4-1/8"
7-1/2"
4-1/8"
7-3/8"
---
---
4"
5-7/8"
5"
6-7/8"
5"
7-1/8"
4-3/4"
7"
4-3/4"
7-5/8"
4-3/4"
8-1/8"
4-5/8"
8-1/4"
4-5/8"
9-1/4"
5"
7"
6-1/8"
7-3/4"
6-1/8"
8-1/2"
5-13/16"
8-3/8"
5-13/16"
9-1/2"
5-13/16"
9-3/4"
5-5/8"
10"
5-5/8"
11"
6"
8-1/4"
7-3/16"
8-3/4"
7-3/16"
9-7/8"
6-7/8"
9-3/4"
6-7/8"
10-1/2"
6-7/8"
11-3/8"
6-3/4"
11-1/8"
6-3/4"
12-1/2"
8"
10-3/8"
9-3/16"
11"
9-3/16"
12-1/8"
8-7/8"
12"
8-7/8"
12-5/8"
8-7/8"
14-1/8"
8-1/2"
13-7/8"
8-1/2"
15-1/4"
10"
12-1/2"
11-5/16"
13-3/8"
11-5/16"
14-1/4"
10-13/16"
14-1/8"
10-13/16"
15-3/4"
10-13/16"
17-1/8"
10-5/8"
17-1/8"
10-5/8"
18-3/4"
12"
14-3/4"
13-3/8"
16-1/8"
13-3/8"
16-5/8"
12-7/8"
16-1/2"
12-7/8"
18"
12-7/8"
19-5/8"
12-3/4"
20-1/2"
12-3/4"
21-5/8"
14"
16"
14-5/8"
17-3/4"
14-5/8"
19-1/8"
14-1/4"
19"
14-1/4"
19-3/8"
14-1/4"
20-1/2"
14-1/4"
22-3/4"
---
---
16"
18-1/4"
16-5/8"
20-1/4"
16-5/8"
21-1/4"
16-1/4"
21-1/8"
16-1/4"
22-1/4"
16-1/4"
22-5/8"
16-1/4"
25-1/4"
---
---
18"
20-3/4"
18-11/16"
21-5/8"
18-11/16"
23-1/2"
18-1/2"
23-3/8"
18-1/2"
24-1/8"
18-1/4"
25-1/8"
18-1/4"
27-3/4"
---
---
20"