Table of content
Introduction
ANSI 150 flanges are a specification in a standard developed by the American National Standards Institute (ANSI). They are often referenced as ANSI B16.5. This means that they have consistent dimensions and tolerances, which dictate that flanges produced by different manufacturers are identical and can fit seamlessly with pipes. This standardized design helps simplify the production and installation process.
What are ANSI 150 Flanges?
First of all, ANSI is the standard set by the American National Standards Institute. ANSI 150 flanges are flanges that can withstand a maximum pressure of 150 pounds per square inch (PSI) at a specific temperature. Sizes can be produced from 1/2 inch to 24 inches. Different flange types are subject to the ANSI 150 standard.
Key Dimensions of ANSI 150 Flanges
|
Nominal Pipe Size |
Outside Diameter |
Thickness |
Raised Face Diameter |
Length Thru Hub |
Point of Weld |
Hub Diameter |
Bore |
Approximate Weight |
Bolt Circle |
Number of Holes |
Diameter of Holes |
|
(O) |
(T) |
(R) |
(Y) |
(A) |
(X) |
(B) |
(lbs) |
(C) |
|||
|
1/2 |
3.50 |
0.44 |
1.38 |
1.88 |
0.84 |
1.19 |
0.62 |
2 |
2.38 |
4 |
0.63 |
|
3/4 |
3.88 |
0.50 |
1.69 |
2.06 |
1.05 |
1.50 |
0.82 |
2 |
2.75 |
4 |
0.63 |
|
1 |
4.25 |
0.56 |
2.00 |
2.19 |
1.32 |
1.94 |
1.05 |
3 |
3.13 |
4 |
0.63 |
|
1 1/4 |
4.63 |
0.63 |
2.50 |
2.25 |
1.66 |
2.31 |
1.38 |
3 |
3.50 |
4 |
0.63 |
|
1 1/2 |
5.00 |
0.69 |
2.88 |
2.44 |
1.90 |
2.56 |
1.61 |
4 |
3.88 |
4 |
0.63 |
|
2 |
6.00 |
0.75 |
3.63 |
2.50 |
2.38 |
3.06 |
2.07 |
6 |
4.75 |
4 |
0.75 |
|
2 1/2 |
7.00 |
0.88 |
4.13 |
2.75 |
2.88 |
3.56 |
2.47 |
8 |
5.50 |
4 |
0.75 |
|
3 |
7.50 |
0.94 |
5.00 |
2.75 |
3.50 |
4.25 |
3.07 |
10 |
6.00 |
4 |
0.75 |
|
3 1/2 |
8.50 |
0.94 |
5.50 |
2.81 |
4.00 |
4.81 |
3.55 |
12 |
7.00 |
8 |
0.75 |
|
4 |
9.00 |
0.94 |
6.19 |
3.00 |
4.50 |
5.31 |
4.03 |
15 |
7.50 |
8 |
0.75 |
|
5 |
10.00 |
0.94 |
7.31 |
3.50 |
5.56 |
6.44 |
5.05 |
19 |
8.50 |
8 |
0.88 |
|
6 |
11.00 |
1.00 |
8.50 |
3.50 |
6.63 |
7.56 |
6.07 |
24 |
9.50 |
8 |
0.88 |
|
8 |
13.50 |
1.13 |
10.63 |
4.00 |
8.63 |
9.69 |
7.98 |
39 |
11.75 |
8 |
0.88 |
|
10 |
16.00 |
1.19 |
12.75 |
4.00 |
10.75 |
12.00 |
10.02 |
52 |
14.25 |
12 |
1.00 |
|
12 |
19.00 |
1.25 |
15.00 |
4.50 |
12.75 |
14.38 |
12.00 |
80 |
17.00 |
12 |
1.00 |
|
14 |
21.00 |
1.38 |
16.25 |
5.00 |
14.00 |
15.75 |
13.25 |
110 |
18.75 |
12 |
1.13 |
|
16 |
23.50 |
1.44 |
18.50 |
5.00 |
16.00 |
18.00 |
15.25 |
140 |
21.25 |
16 |
1.13 |
|
18 |
25.00 |
1.56 |
21.00 |
5.50 |
18.00 |
19.88 |
17.25 |
150 |
22.75 |
16 |
1.25 |
|
20 |
27.50 |
1.69 |
23.00 |
5.69 |
20.00 |
22.00 |
19.25 |
180 |
25.00 |
20 |
1.25 |
|
22 |
29.50 |
1.81 |
25.25 |
5.88 |
22.00 |
24.25 |
21.25 |
225 |
27.25 |
20 |
1.38 |
|
24 |
32.00 |
1.88 |
27.25 |
6.00 |
24.00 |
26.13 |
23.25 |
260 |
29.50 |
20 |
1.38 |
ANSI 150 Flange Dimension Tables
Weld neck flanges
|
Nominal Pipe Size |
Outside Diameter |
Thickness |
Raised Face Diameter |
Length Thru Hub |
Point of Weld |
Hub Diameter |
Bore |
Approximate Weight |
Bolt Circle |
Number of Holes |
Diameter of Holes |
|
(O) |
(T) |
(R) |
(Y) |
(A) |
(X) |
(B) |
(lbs) |
(C) |
|||
|
1/2 |
3.50 |
0.44 |
1.38 |
1.88 |
0.84 |
1.19 |
0.62 |
2 |
2.38 |
4 |
0.63 |
|
3/4 |
3.88 |
0.50 |
1.69 |
2.06 |
1.05 |
1.50 |
0.82 |
2 |
2.75 |
4 |
0.63 |
|
1 |
4.25 |
0.56 |
2.00 |
2.19 |
1.32 |
1.94 |
1.05 |
3 |
3.13 |
4 |
0.63 |
|
1 1/4 |
4.63 |
0.63 |
2.50 |
2.25 |
1.66 |
2.31 |
1.38 |
3 |
3.50 |
4 |
0.63 |
|
1 1/2 |
5.00 |
0.69 |
2.88 |
2.44 |
1.90 |
2.56 |
1.61 |
4 |
3.88 |
4 |
0.63 |
|
2 |
6.00 |
0.75 |
3.63 |
2.50 |
2.38 |
3.06 |
2.07 |
6 |
4.75 |
4 |
0.75 |
|
2 1/2 |
7.00 |
0.88 |
4.13 |
2.75 |
2.88 |
3.56 |
2.47 |
8 |
5.50 |
4 |
0.75 |
|
3 |
7.50 |
0.94 |
5.00 |
2.75 |
3.50 |
4.25 |
3.07 |
10 |
6.00 |
4 |
0.75 |
|
3 1/2 |
8.50 |
0.94 |
5.50 |
2.81 |
4.00 |
4.81 |
3.55 |
12 |
7.00 |
8 |
0.75 |
|
4 |
9.00 |
0.94 |
6.19 |
3.00 |
4.50 |
5.31 |
4.03 |
15 |
7.50 |
8 |
0.75 |
|
5 |
10.00 |
0.94 |
7.31 |
3.50 |
5.56 |
6.44 |
5.05 |
19 |
8.50 |
8 |
0.88 |
|
6 |
11.00 |
1.00 |
8.50 |
3.50 |
6.63 |
7.56 |
6.07 |
24 |
9.50 |
8 |
0.88 |
|
8 |
13.50 |
1.13 |
10.63 |
4.00 |
8.63 |
9.69 |
7.98 |
39 |
11.75 |
8 |
0.88 |
|
10 |
16.00 |
1.19 |
12.75 |
4.00 |
10.75 |
12.00 |
10.02 |
52 |
14.25 |
12 |
1.00 |
|
12 |
19.00 |
1.25 |
15.00 |
4.50 |
12.75 |
14.38 |
12.00 |
80 |
17.00 |
12 |
1.00 |
|
14 |
21.00 |
1.38 |
16.25 |
5.00 |
14.00 |
15.75 |
13.25 |
110 |
18.75 |
12 |
1.13 |
|
16 |
23.50 |
1.44 |
18.50 |
5.00 |
16.00 |
18.00 |
15.25 |
140 |
21.25 |
16 |
1.13 |
|
18 |
25.00 |
1.56 |
21.00 |
5.50 |
18.00 |
19.88 |
17.25 |
150 |
22.75 |
16 |
1.25 |
|
20 |
27.50 |
1.69 |
23.00 |
5.69 |
20.00 |
22.00 |
19.25 |
180 |
25.00 |
20 |
1.25 |
|
22 |
29.50 |
1.81 |
25.25 |
5.88 |
22.00 |
24.25 |
21.25 |
225 |
27.25 |
20 |
1.38 |
|
24 |
32.00 |
1.88 |
27.25 |
6.00 |
24.00 |
26.13 |
23.25 |
260 |
29.50 |
20 |
1.38 |
Slip-on flanges
|
Nominal Pipe Size |
Outside Diameter |
Thickness |
Raised Face Diameter |
Length Thru Hub |
Hub Diameter |
Bore |
Approximate Weight |
Bolt Circle |
Number of Holes |
Diameter of Holes |
|
(O) |
(T) |
(R) |
(Y) |
(X) |
(B) |
(lbs) |
(C) |
|||
|
1/2 |
3.50 |
0.44 |
1.38 |
0.63 |
1.19 |
0.88 |
1 |
2.38 |
4 |
0.63 |
|
3/4 |
3.88 |
0.50 |
1.69 |
0.63 |
1.50 |
1.09 |
2 |
2.75 |
4 |
0.63 |
|
1 |
4.25 |
0.56 |
2.00 |
0.69 |
1.94 |
1.36 |
2 |
3.13 |
4 |
0.63 |
|
1 1/4 |
4.63 |
0.63 |
2.50 |
0.81 |
2.31 |
1.70 |
3 |
3.50 |
4 |
0.63 |
|
1 1/2 |
5.00 |
0.69 |
2.88 |
0.88 |
2.56 |
1.95 |
3 |
3.88 |
4 |
0.63 |
|
2 |
6.00 |
0.75 |
3.63 |
1.00 |
3.06 |
2.44 |
5 |
4.75 |
4 |
0.75 |
|
2 1/2 |
7.00 |
0.88 |
4.13 |
1.13 |
3.56 |
2.94 |
7 |
5.50 |
4 |
0.75 |
|
3 |
7.50 |
0.94 |
5.00 |
1.19 |
4.25 |
3.57 |
8 |
6.00 |
4 |
0.75 |
|
3 1/2 |
8.50 |
0.94 |
5.50 |
1.25 |
4.81 |
4.07 |
11 |
7.00 |
8 |
0.75 |
|
4 |
9.00 |
0.94 |
6.19 |
1.31 |
5.31 |
4.57 |
13 |
7.50 |
8 |
0.75 |
|
5 |
10.00 |
0.94 |
7.31 |
1.44 |
6.44 |
5.66 |
15 |
8.50 |
8 |
0.88 |
|
6 |
11.00 |
1.00 |
8.50 |
1.56 |
7.56 |
6.72 |
19 |
9.50 |
8 |
0.88 |
|
8 |
13.50 |
1.13 |
10.63 |
1.75 |
9.69 |
8.72 |
30 |
11.75 |
8 |
0.88 |
|
10 |
16.00 |
1.19 |
12.75 |
1.94 |
12.00 |
10.88 |
43 |
14.25 |
12 |
1.00 |
|
12 |
19.00 |
1.25 |
15.00 |
2.19 |
14.38 |
12.88 |
64 |
17.00 |
12 |
1.00 |
|
14 |
21.00 |
1.38 |
16.25 |
2.25 |
15.75 |
14.14 |
90 |
18.75 |
12 |
1.13 |
|
16 |
23.50 |
1.44 |
18.50 |
2.50 |
18.00 |
16.16 |
98 |
21.25 |
16 |
1.13 |
|
18 |
25.00 |
1.56 |
21.00 |
2.69 |
19.88 |
18.18 |
130 |
22.75 |
16 |
1.25 |
|
20 |
27.50 |
1.69 |
23.00 |
2.88 |
22.00 |
20.20 |
165 |
25.00 |
20 |
1.25 |
|
22 |
29.50 |
1.81 |
25.25 |
3.13 |
24.25 |
22.22 |
185 |
27.25 |
20 |
1.38 |
|
24 |
32.00 |
1.88 |
27.25 |
3.25 |
26.13 |
24.25 |
220 |
29.50 |
20 |
1.38 |
Blind flanges
|
Nominal Pipe Size |
Outside Diameter |
Thickness |
Raised Face Diameter |
Approximate Weight |
Bolt Circle |
Number of Holes |
Diameter of Holes |
|
(O) |
(T) |
(R) |
(lbs) |
(C) |
|||
|
1/2 |
3.50 |
0.44 |
1.38 |
1 |
2.38 |
4 |
0.63 |
|
3/4 |
3.88 |
0.50 |
1.69 |
2 |
2.75 |
4 |
0.63 |
|
1 |
4.25 |
0.56 |
2.00 |
2 |
3.13 |
4 |
0.63 |
|
1 1/4 |
4.63 |
0.63 |
2.50 |
3 |
3.50 |
4 |
0.63 |
|
1 1/2 |
5.00 |
0.69 |
2.88 |
4 |
3.88 |
4 |
0.63 |
|
2 |
6.00 |
0.75 |
3.63 |
5 |
4.75 |
4 |
0.75 |
|
2 1/2 |
7.00 |
0.88 |
4.13 |
7 |
5.50 |
4 |
0.75 |
|
3 |
7.50 |
0.94 |
5.00 |
9 |
6.00 |
4 |
0.75 |
|
3 1/2 |
8.50 |
0.94 |
5.50 |
13 |
7.00 |
8 |
0.75 |
|
4 |
9.00 |
0.94 |
6.19 |
17 |
7.50 |
8 |
0.75 |
|
5 |
10.00 |
0.94 |
7.31 |
20 |
8.50 |
8 |
0.88 |
|
6 |
11.00 |
1.00 |
8.50 |
26 |
9.50 |
8 |
0.88 |
|
8 |
13.50 |
1.13 |
10.63 |
45 |
11.75 |
8 |
0.88 |
|
10 |
16.00 |
1.19 |
12.75 |
70 |
14.25 |
12 |
1.00 |
|
12 |
19.00 |
1.25 |
15.00 |
110 |
17.00 |
12 |
1.00 |
|
14 |
21.00 |
1.38 |
16.25 |
140 |
18.75 |
12 |
1.13 |
|
16 |
23.50 |
1.44 |
18.50 |
180 |
21.25 |
16 |
1.13 |
|
18 |
25.00 |
1.56 |
21.00 |
220 |
22.75 |
16 |
1.25 |
|
20 |
27.50 |
1.69 |
23.00 |
285 |
25.00 |
20 |
1.25 |
|
22 |
29.50 |
1.81 |
25.25 |
355 |
27.25 |
20 |
1.38 |
|
24 |
32.00 |
1.88 |
27.25 |
430 |
29.50 |
20 |
1.38 |
Threaded flanges
|
Nominal Pipe Size |
Outside Diameter |
Thickness |
Raised Face Diameter |
Length Thru Hub |
Hub Diameter |
Approximate Weight |
Bolt Circle |
Number of Holes |
Diameter of Holes |
|
(O) |
(T) |
(R) |
(Y) |
(X) |
(lbs) |
(C) |
|||
|
1/2 |
3.50 |
0.44 |
1.38 |
0.63 |
1.19 |
1 |
2.38 |
4 |
0.63 |
|
3/4 |
3.88 |
0.50 |
1.69 |
0.63 |
1.50 |
2 |
2.75 |
4 |
0.63 |
|
1 |
4.25 |
0.56 |
2.00 |
0.69 |
1.94 |
2 |
3.13 |
4 |
0.63 |
|
1 1/4 |
4.63 |
0.63 |
2.50 |
0.81 |
2.31 |
3 |
3.50 |
4 |
0.63 |
|
1 1/2 |
5.00 |
0.69 |
2.88 |
0.88 |
2.56 |
3 |
3.88 |
4 |
0.63 |
|
2 |
6.00 |
0.75 |
3.63 |
1.00 |
3.06 |
5 |
4.75 |
4 |
0.75 |
|
2 1/2 |
7.00 |
0.88 |
4.13 |
1.13 |
3.56 |
7 |
5.50 |
4 |
0.75 |
|
3 |
7.50 |
0.94 |
5.00 |
1.19 |
4.25 |
8 |
6.00 |
4 |
0.75 |
|
3 1/2 |
8.50 |
0.94 |
5.50 |
1.25 |
4.81 |
11 |
7.00 |
8 |
0.75 |
|
4 |
9.00 |
0.94 |
6.19 |
1.31 |
5.31 |
13 |
7.50 |
8 |
0.75 |
|
5 |
10.00 |
0.94 |
7.31 |
1.44 |
6.44 |
15 |
8.50 |
8 |
0.88 |
|
6 |
11.00 |
1.00 |
8.50 |
1.56 |
7.56 |
19 |
9.50 |
8 |
0.88 |
|
8 |
13.50 |
1.13 |
10.63 |
1.75 |
9.69 |
30 |
11.75 |
8 |
0.88 |
|
10 |
16.00 |
1.19 |
12.75 |
1.94 |
12.00 |
43 |
14.25 |
12 |
1.00 |
|
12 |
19.00 |
1.25 |
15.00 |
2.19 |
14.38 |
64 |
17.00 |
12 |
1.00 |
|
14 |
21.00 |
1.38 |
16.25 |
2.25 |
15.75 |
90 |
18.75 |
12 |
1.13 |
|
16 |
23.50 |
1.44 |
18.50 |
2.50 |
18.00 |
98 |
21.25 |
16 |
1.13 |
|
18 |
25.00 |
1.56 |
21.00 |
2.69 |
19.88 |
130 |
22.75 |
16 |
1.25 |
|
20 |
27.50 |
1.69 |
23.00 |
2.88 |
22.00 |
165 |
25.00 |
20 |
1.25 |
|
22 |
29.50 |
1.81 |
25.25 |
3.13 |
24.25 |
185 |
27.25 |
20 |
1.38 |
|
24 |
32.00 |
1.88 |
27.25 |
3.25 |
26.13 |
220 |
29.50 |
20 |
1.38 |
Socket weld flanges
|
Nominal Pipe Size |
Outside Diameter |
Thickness |
Raised Face Diameter |
Length Thru Hub |
Hub Diameter |
Bore |
Bore |
Depth of Soket |
Approximate Weight |
Bolt Circle |
Number of Holes |
Diameter of Holes |
|
(O) |
(T) |
(R) |
(Y) |
(X) |
(B1) |
(B2) |
(D) |
(lbs) |
(C) |
|||
|
1/2 |
3.50 |
0.44 |
1.38 |
0.63 |
1.19 |
0.62 |
0.88 |
0.38 |
1 |
2.38 |
4 |
0.63 |
|
3/4 |
3.88 |
0.50 |
1.69 |
0.63 |
1.50 |
0.82 |
1.09 |
0.44 |
2 |
2.75 |
4 |
0.63 |
|
1 |
4.25 |
0.56 |
2.00 |
0.69 |
1.94 |
1.05 |
1.36 |
0.50 |
2 |
3.13 |
4 |
0.63 |
|
1 1/4 |
4.63 |
0.63 |
2.50 |
0.81 |
2.31 |
1.38 |
1.70 |
0.56 |
3 |
3.50 |
4 |
0.63 |
|
1 1/2 |
5.00 |
0.69 |
2.88 |
0.88 |
2.56 |
1.61 |
1.95 |
0.63 |
3 |
3.88 |
4 |
0.63 |
|
2 |
6.00 |
0.75 |
3.63 |
1.00 |
3.06 |
2.07 |
2.44 |
0.69 |
5 |
4.75 |
4 |
0.75 |
|
2 1/2 |
7.00 |
0.88 |
4.13 |
1.13 |
3.56 |
2.47 |
2.94 |
0.75 |
7 |
5.50 |
4 |
0.75 |
|
3 |
7.50 |
0.94 |
5.00 |
1.19 |
4.25 |
3.07 |
3.57 |
0.81 |
8 |
6.00 |
4 |
0.75 |
Lap joint flanges
|
Nominal Pipe Size |
Outside Diameter |
Thickness |
Length Thru Hub |
Hub Diameter |
Radius |
Bore |
Approximate Weight |
Bolt Circle |
Number of Holes |
Diameter of Holes |
|
(O) |
(T) |
(Y) |
(X) |
(r) |
(B) |
(lbs) |
(C) |
|||
|
1/2 |
3.50 |
0.44 |
0.63 |
1.19 |
0.13 |
0.90 |
1 |
2.38 |
4 |
0.63 |
|
3/4 |
3.88 |
0.50 |
0.63 |
1.50 |
0.13 |
1.11 |
2 |
2.75 |
4 |
0.63 |
|
1 |
4.25 |
0.56 |
0.69 |
1.94 |
0.13 |
1.38 |
2 |
3.13 |
4 |
0.63 |
|
1 1/4 |
4.63 |
0.63 |
0.81 |
2.31 |
0.19 |
1.72 |
3 |
3.50 |
4 |
0.63 |
|
1 1/2 |
5.00 |
0.69 |
0.88 |
2.56 |
0.25 |
1.97 |
3 |
3.88 |
4 |
0.63 |
|
2 |
6.00 |
0.75 |
1.00 |
3.06 |
0.31 |
2.46 |
5 |
4.75 |
4 |
0.75 |
|
2 1/2 |
7.00 |
0.88 |
1.13 |
3.56 |
0.31 |
2.97 |
7 |
5.50 |
4 |
0.75 |
|
3 |
7.50 |
0.94 |
1.19 |
4.25 |
0.38 |
3.60 |
8 |
6.00 |
4 |
0.75 |
|
3 1/2 |
8.50 |
0.94 |
1.25 |
4.81 |
0.38 |
4.10 |
11 |
7.00 |
8 |
0.75 |
|
4 |
9.00 |
0.94 |
1.31 |
5.31 |
0.44 |
4.60 |
13 |
7.50 |
8 |
0.75 |
|
5 |
10.00 |
0.94 |
1.44 |
6.44 |
0.44 |
5.69 |
15 |
8.50 |
8 |
0.88 |
|
6 |
11.00 |
1.00 |
1.56 |
7.56 |
0.50 |
6.75 |
19 |
9.50 |
8 |
0.88 |
|
8 |
13.50 |
1.13 |
1.75 |
9.69 |
0.50 |
8.75 |
30 |
11.75 |
8 |
0.88 |
|
10 |
16.00 |
1.19 |
1.94 |
12.00 |
0.50 |
10.92 |
43 |
14.25 |
12 |
1.00 |
|
12 |
19.00 |
1.25 |
2.19 |
14.38 |
0.50 |
12.92 |
64 |
17.00 |
12 |
1.00 |
|
14 |
21.00 |
1.38 |
3.13 |
15.75 |
0.50 |
14.18 |
105 |
18.75 |
12 |
1.13 |
|
16 |
23.50 |
1.44 |
3.44 |
18.00 |
0.50 |
16.19 |
140 |
21.25 |
16 |
1.13 |
|
18 |
25.00 |
1.56 |
2.88 |
19.88 |
0.50 |
18.20 |
160 |
22.75 |
16 |
1.25 |
|
20 |
27.50 |
1.69 |
4.06 |
22.00 |
0.50 |
20.25 |
195 |
25.00 |
20 |
1.25 |
|
22 |
29.50 |
1.81 |
4.25 |
24.25 |
0.50 |
22.25 |
245 |
27.25 |
20 |
1.38 |
|
24 |
32.00 |
1.88 |
4.38 |
26.13 |
0.50 |
24.25 |
275 |
29.50 |
20 |
1.38 |
Conclusion
ANSI 150 flange is a standard flange commonly used in piping systems. It has a standardized design and wide applicability. It is very important to understand what the 150 flange standard includes. If you have any other questions about this product, please consult our technicians.
