Weld Flange Dimensions

WELD FLANGE DIMENSIONS

WELDING NECK FLANGES
Nom.
Pipe
Size
150 lb.
300 lb
400 lb.
600 lb.
Outside
Dia. of
Flange
O
Length
Thru
Hub
Y1
Outside
Dia. of
Flange
O
Length
Thru
Hub
Y1
Outside
Dia. of
Flange
O
Length
Thru
Hub
Y2
Outside
Dia. of
Flange
O
Length
Thru
Hub
Y2
1/2
3-1/2
1-7/8
3-3/4
2-1/16
For
sizes
3-1/2
and
smaller
use
600 lb.
Standard
3-3/4
2-1/16
3/4
3-7/8
2-1/16
4-5/8
2-1/4
4-5/8
2-1/4
1
4-1/4
2-3/16
4-7/8
2-7/16
4-7/8
2-7/16
1-1/4
4-5/8
2-1/4
5-1/4
2-9/16
5-1/4
2-5/8
1-1/2
5
2-7/16
6-1/8
2-11/16
6-1/8
2-3/4
2
6
2-1/2
6-1/2
2-3/4
6-1/2
2-7/8
2-1/2
7
2-3/4
7-1/2
3
7-1/2
3-1/8
3
7-1/2
2-3/4
 8-1/4
3-1/8
8-1/4
3-1/4
3-1/2
8-1/2
2-13/16
 9
3-3/16
9
3-3/8
4
 9
3
10
3-3/8
10
3-1/2
10-3/4
4
5
10
3-1/2
11
3-7/8
11
4
13
4-1/2
6
11
3-1/2
12-1/2
3-7/8
12-1/2
4-1/16
14
4-5/8
8
13-1/2
4
15
4-3/8
15
4-5/8
16-1/2
5-1/4
10
16
4
17-1/2
4-5/8
17-1/2
4-7/8
20
6
12
19
4-1/2
20-1/2
5-1/8
20-1/2
5-3/8
22
6-1/8
14
21
5
23
5-5/8
23
5-7/8
23-3/4
6-1/2
16
23-1/2
5
25-1/2
5-3/4
25-1/2
6
27
7
18
25
5-1/2
28
6-1/4
28
6-1/2
29-1/4
7-1/4
20
27-1/2
5-11/16
30-1/2
6-3/8
30-1/2
6-5/8
32
7-1/2
22
29-1/2
5-7/8
33
6-1/2
33
6-3/4
34-1/4
7-3/4
24
32
6
36
6-5/8
36
6-7/8
37
8
26
34-1/4
5
38-1/4
7-1/4
38-1/4
 7-5/8
40
8-3/4
30
38-3/4
5-1/8
43
8-1/4
43
 8-5/8
44-1/2
9-3/4
34
43-3/4
5-5/16
47-1/2
9-1/8
47-1/2
 9-1/2
49
10-5/8
36
46
5-3/8
50
9-1/2
50
 9-7/8
51-3/4
11-1/8
42
53
5-5/8
57
10-7/8
57
11-3/8
58-3/4
12-3/4

1 The 1/16 inch raised face is included in “Length thru Hub ‘Y’.”

2 The 1/4 inch raised face is not included in “Length thru Hub ‘Y’.”

Weld Flange Dimensions
Weld Flange Dimensions
[one_third_last]Weld Flange Dimensions[/one_third_last]

WELD FLANGE DIMENSIONS

SLIP-ON, THREADED, AND SOCKET TYPE FLANGES
Nom.
Pipe
Size
150 lb.
300 lb
400 lb.
600 lb.
Outside
Dia.
O
Length
Thru
Hub
Y1
Outside
Dia.
O
Length
Thru
Hub
Y1
Outside
Dia.
O
Length
Thru
Hub
Y2
Outside
Dia.
Length
Thru
Hub
Y2
1/4
3-1/2
5/8*†
3-3/4
7/8*†
For
sizes
3-1/2
and
smaller
use
600 lb.
Standard
3-3/4
7/8*†
3/8
3-1/2
5/8*†
3-3/4
7/8*†
3-3/4
7/8*†
1/2
3-1/2
5/8
3-3/4
7/8
3-3/4
7/8
3/4
3-7/8
5/8
4-5/8
1
4-5/8
1
1
4-1/4
11/16
4-7/8
1-1/16
4-7/8
1-1/16
1-1/4
4-5/8
13/16
5-1/4
1-1/16
5-1/4
1-1/8
1-1/2
5
7/8
6-1/8
1-3/16
6-1/8
1-1/4
2
6
1
6-1/2
1-5/16
6-1/2
1-7/16
2-1/2
7
1-1/8
7-1/2
1-1/2
7-1/2
1-5/8
3
7-1/2
1-3/16
8-1/4
1-11/16
8-1/4
1-13/16
3-1/2
8-1/2
1-1/4
9
1-3/4
  —
  —
9
1-15/16
4
9
1-5/16
10
1-7/8
10
2‡
10-3/4
2-1/8‡
5
10
1-7/16
11
2‡
11
2-1/8‡
13
2-3/8‡
6
11
1-9/16
12-1/2
2-1/16‡
12-1/2
2-1/4‡
14
2-5/8‡
8
13-1/2
1-3/4
15
2-7/16‡
15
2-11/16‡
16-1/2
3‡
10
16
1-15/16
17-1/2
2-5/8‡
17-1/2
2-7/8‡
20
3-3/8‡
12
19
2-3/16
20-1/2
2-7/8‡
20-1/2
3-1/8‡
22
3-5/8‡
14
21
2-1/4
23
3‡
23
3-5/16‡
23-3/4
3-11/16‡
16
23-1/2
2-1/2
25-1/2
3-1/4‡
25-1/2
3-11/16‡
27
4-3/16‡
18
25
2-11/16
28
3-1/2‡
28
3-7/8‡
29-1/4
4-5/8‡
20
27-1/2
2-7/8
30-1/2
3-3/4‡
30-1/2
4‡
32
5‡
22
29-1/2
3-1/8†‡
33
4†‡
33
4-1/4†‡
34-1/4
5-1/4†‡
24
32
3-1/4
36
4-3/16‡
36
4-1/2‡
37
5-1/2‡
26
34-1/4
3-3/8†‡
38-1/4
7-1/4†‡
38-1/4
7-5/8†‡
40
8-3/4†‡
30
38-3/4
3-1/2†‡
43
8-1/4†‡
43
8-5/8†‡
44-1/2
9-3/4†‡
34
43-3/4
3-11/16†‡
47-1/2
9-1/8†‡
47-1/2
9-1/2†‡
49
10-5/8†‡
36
46
3-3/4†‡
50
9-1/2†‡
50
9-7/8†‡
51-3/4
11-1/8†‡
42
53
4†‡
57
10-7/8†‡
57
11-3/8†‡
58-3/4
12-3/4†‡

1 The 1/16 inch raised face is included in “Length thru Hub ‘Y’.”
2 The 1/4 inch raised face is not included in “Length thru Hub ‘Y’.”
* Not available in Slip-On type.
† Not available in Threaded type.
‡ Not available in Socket type.

Weld Flange Dimensions

WELD FLANGE DIMENSIONS

LAP JOINT FLANGES
Nom.
Pipe
Size
150 lb.
300 lb
400 lb.
600 lb.
Outside
Dia. of
Flange
O
Length
Thru
Hub
Z1
Outside
Dia. of
Flange
O
Length
Thru
Hub
Z1
Outside
Dia. of
Flange
O
Length
Thru
Hub
Z2
Outside
Dia. of
Flange
O
Length
Thru
Hub
Z2
1/2
3-1/2
5/8
3-3/4
7/8
For
sizes
3-1/2
and
smaller
use
600 lb.
Standard
3-3/4
7/8
3/4
3-7/8
5/8
4-5/8
1
4-5/8
1
1
4-1/4
11/16
4-7/8
1-1/16
4-7/8
1-1/16
1-1/4
4-5/8
13/16
5-1/4
1-1/16
5-1/4
1-1/8
1-1/2
5
7/8
6-1/8
1-3/16
6-1/8
1-1/4
2
6
1
6-1/2
1-5/16
6-1/2
1-7/16
2-1/2
7
1-1/8
7-1/2
1-1/2
7-1/2
1-5/8
3
7-1/2
1-3/16
8-1/4
1-11/16
8-1/4
1-13/16
3-1/2
8-1/2
1-1/4
 9
1-3/4
9
1-15/16
4
9
1-5/16
10
1-7/8
10
2
10-3/4
2-1/8
5
10
1-7/16
11
2
11
2-1/8
13
2-3/8
6
11
1-9/16
12-1/2
2-1/16
12-1/2
2-1/4
14
2-5/8
8
13-1/2
1-3/4
15
2-7/16
15
2-11/16
16-1/2
3
10
16
1-15/16
17-1/2
3-3/4
17-1/2
4
20
4-3/8
12
19
2-3/16
20-1/2
4
20-1/2
4-1/4
22
4-5/8
14
21
3-1/8
23
4-3/8
23
4-5/8
23-3/4
5
16
23-1/2
3-7/16
25-1/2
4-3/4
25-1/2
5
27
5-1/2
18
25
3-13/16
28
5-1/8
28
5-3/8
29-1/4
6
20
27-1/2
4-1/16
30-1/2
5-1/2
30-1/2
5-3/4
32
6-1/2
24
32
4-3/8
36
6
36
6-1/4
37
7-1/4

WELD FLANGE DIMENSIONS

BLIND FLANGES
Nom.
Pipe
Size
150 lb.
300 lb
400 lb.
600 lb.
Outside
Dia. of
Flange
O
Thick-
ness
Q1
Outside
Dia. of
Flange
O
Thick-
ness
Q1
Outside
Dia. of
Flange
O
Thick-
ness
Q2
Outside
Dia. of
Flange
O
Thick-
ness
Q2
1/2
3-1/2
7/16
3-3/4
9/16
For
sizes
3-1/2
and
smaller
use
600 lb.
Standard
3-3/4
9/16
3/4
3-7/8
1/2
4-5/8
5/8
4-5/8
5/8
1
4-1/4
9/16
4-7/8
11/16
4-7/8
11/16
1-1/4
4-5/8
5/8
5-1/4
3/4
5-1/4
13/16
1-1/2
5
11/16
6-1/8
13/16
6-1/8
7/8
2
6
3/4
6-1/2
7/8
6-1/2
1
2-1/2
7
7/8
7-1/2
1
7-1/2
1-1/8
3
7-1/2
15/16
8-1/4
1-1/8
8-1/4
1-1/4
3-1/2
8-1/2
15/16
 9
1-3/16
9
1-3/8
4
9
15/16
10
1-1/4
10
1-3/8
10-3/4
1-1/2
5
10
15/16
11
1-3/8
11
1-1/2
13
1-3/4
6
11
1
12-1/2
1-7/16
12-1/2
1-5/8
14
1-7/8
8
13-1/2
1-1/8
15
1-5/8
15
1-7/8
16-1/2
2-3/16
10
16
1-3/16
17-1/2
1-7/8
17-1/2
2-1/8
20
2-1/2
12
19
1-1/4
20-1/2
2
20-1/2
2-1/4
22
2-5/8
14
21
1-3/8
23
2-1/8
23
2-3/8
23-3/4
2-3/4
16
23-1/2
1-7/16
25-1/2
2-1/4
25-1/2
2-1/2
27
3
18
25
1-9/16
28
2-3/8
28
2-5/8
29-1/4
3-1/4
20
27-1/2
1-11/16
30-1/2
2-1/2
30-1/2
2-3/4
32
3-1/2
22
29-1/2
1-13/16
33
2-5/8
33
2-7/8
34-1/4
3-3/4
24
32
1-7/8
36
2-3/4
36
3
37
4
26
34-1/4
2
38-1/4
3-1/8
38-1/4
3-1/2
40
4-1/4
30
38-3/4
2-1/8
43
3-5/8
43
4
44-1/2
4-1/2
34
43-3/4
2-5/16
47-1/2
4
47-1/2
4-3/8
49
4-3/4
36
46
2-3/8
50
4-1/8
50
4-1/2
51-3/4
4-7/8
42
53
2-5/8
57
4-5/8
57
5-1/8
58-3/4
5-1/2

1 The 1/16 inch raised face is included in “Length thru Hub ‘Z’” and “Thickness ‘Q’.”
2 The 1/4 inch raised face is not included in “Length thru Hub ‘Z’” and “Thickness ‘Q’.”