Quick Inquiry
ASME B16.5 Flange
Specification of ANSI/ ASME B16.5 Flange
Size |
1/2″ (15 NB) to 48″ (1200NB) |
Standards |
ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings. |
Pressure Ratings |
PN6, PN10, PN16, PN25, PN40, PN64 etc. |
Pressure class |
150#, 300#, 600#, 1500# |
Dimensions and Pressure Ratings |
Table D, E, F, & H, MSS- SP-44, BS3293, ANSI, BS4504, PN6, 10, 16, 25, 64 BS10, DIN Standards |
Coating/Surface Treatment |
Yellow Transparent, Anti-rust Paint, Oil Black Paint, Zinc Plated, Cold and Hot Dip Galvanized. |
ASME B16.5 Class 150 Flange Dimensions
Nominal Size |
Outside Diameter |
Min. Thickness |
RF Dia. |
No. of Bolt Holes |
Diameter of Holes |
Bolt Circle |
SO Bore ID |
WN Bore ID |
Dia. Hub Base |
Dia. of Hub Top |
SO LTH |
WN LTH |
1⁄2 |
3.50 |
0.38 |
1.38 |
4 |
0.62 |
2.38 |
0.88 |
0.62 |
1.19 |
0.84 |
0.56 |
1.81 |
3⁄4 |
3.88 |
0.44 |
1.69 |
4 |
0.62 |
2.75 |
1.09 |
0.82 |
1.50 |
1.05 |
0.56 |
2.00 |
1 |
4.25 |
0.50 |
2.00 |
4 |
0.62 |
3.12 |
1.36 |
1.05 |
1.94 |
1.32 |
0.62 |
2.12 |
11⁄4 |
4.62 |
0.56 |
2.50 |
4 |
0.62 |
3.50 |
1.70 |
1.38 |
2.31 |
1.66 |
0.75 |
2.19 |
11⁄2 |
5.00 |
0.62 |
2.88 |
4 |
0.62 |
3.88 |
1.95 |
1.61 |
2.56 |
1.90 |
0.81 |
2.38 |
2 |
6.00 |
0.69 |
3.62 |
4 |
0.75 |
4.75 |
2.44 |
2.07 |
3.06 |
2.38 |
0.94 |
2.44 |
21⁄2 |
7.00 |
0.81 |
4.12 |
4 |
0.75 |
5.50 |
2.94 |
2.47 |
3.56 |
2.88 |
1.06 |
2.69 |
3 |
7.50 |
0.88 |
5.00 |
4 |
0.75 |
6.00 |
3.57 |
3.07 |
4.25 |
3.50 |
1.12 |
2.69 |
31⁄2 |
8.50 |
0.88 |
5.50 |
8 |
0.75 |
7.00 |
4.07 |
3.55 |
4.81 |
4.00 |
1.19 |
2.75 |
4 |
9.00 |
0.88 |
6.19 |
8 |
0.75 |
7.50 |
4.57 |
4.03 |
5.31 |
4.50 |
1.25 |
2.94 |
5 |
10.00 |
0.88 |
7.31 |
8 |
0.88 |
8.50 |
5.66 |
5.05 |
6.44 |
5.56 |
1.38 |
3.44 |
6 |
11.00 |
0.94 |
8.50 |
8 |
0.88 |
9.50 |
6.72 |
6.07 |
7.56 |
6.63 |
1.50 |
3.44 |
8 |
13.50 |
1.06 |
10.62 |
8 |
0.88 |
11.75 |
8.72 |
7.98 |
9.69 |
8.63 |
1.69 |
3.94 |
10 |
16.00 |
1.12 |
12.75 |
12 |
1.00 |
14.25 |
10.88 |
10.02 |
12.00 |
10.75 |
1.88 |
3.94 |
12 |
19.00 |
1.19 |
15.00 |
12 |
1.00 |
17.00 |
12.88 |
12.00 |
14.38 |
12.75 |
2.12 |
4.44 |
14 |
21.00 |
1.31 |
16.25 |
12 |
1.12 |
18.75 |
14.14 |
13.25 |
15.75 |
14.00 |
2.19 |
4.94 |
16 |
23.50 |
1.38 |
18.50 |
16 |
1.12 |
21.25 |
16.16 |
15.25 |
18.00 |
16.00 |
2.44 |
4.94 |
18 |
25.00 |
1.50 |
21.00 |
16 |
1.25 |
22.75 |
18.18 |
17.25 |
19.88 |
18.00 |
2.62 |
5.44 |
20 |
27.50 |
1.62 |
23.00 |
20 |
1.25 |
25.00 |
20.20 |
19.25 |
22.00 |
20.00 |
2.81 |
5.62 |
22 |
29.50 |
1.75 |
25.25 |
20 |
1.38 |
27.25 |
22.22 |
21.25 |
24.25 |
22.00 |
3.07 |
5.82 |
24 |
32.00 |
1.81 |
27.25 |
20 |
1.38 |
29.50 |
24.25 |
23.25 |
26.12 |
24.00 |
3.19 |
5.94 |
ANSI B16.5 Class 300 Flange Dimensions In M M
Nominal Size |
Outside Diameter |
Min. Thickness |
RF Dia. |
No. of Bolt Holes |
Diameter of Holes |
Bolt Circle |
SO Bore ID |
WN Bore ID |
Dia. Hub Base |
Dia. Hub Top |
SO LTH |
WN LTH |
1⁄2 |
3.75 |
0.50 |
1.38 |
4 |
0.63 |
2.62 |
0.88 |
0.62 |
1.50 |
0.84 |
0.81 |
2.00 |
3⁄4 |
4.62 |
0.56 |
1.69 |
4 |
0.75 |
3.25 |
1.09 |
0.82 |
1.88 |
1.05 |
0.94 |
2.19 |
1 |
4.88 |
0.62 |
2.00 |
4 |
0.75 |
3.50 |
1.36 |
1.05 |
2.12 |
1.32 |
1.00 |
2.38 |
11⁄4 |
5.25 |
0.69 |
2.50 |
4 |
0.75 |
3.88 |
1.70 |
1.38 |
2.50 |
1.66 |
1.00 |
2.50 |
11⁄2 |
6.12 |
0.75 |
2.88 |
4 |
0.88 |
4.50 |
1.95 |
1.61 |
2.75 |
1.90 |
1.13 |
2.63 |
2 |
6.50 |
0.81 |
3.62 |
8 |
0.75 |
5.00 |
2.44 |
2.07 |
3.31 |
2.38 |
1.25 |
2.69 |
21⁄2 |
7.50 |
0.94 |
4.12 |
8 |
0.88 |
5.88 |
2.94 |
2.47 |
3.94 |
2.88 |
1.44 |
2.94 |
3 |
8.25 |
1.06 |
5.00 |
8 |
0.88 |
6.62 |
3.57 |
3.07 |
4.62 |
3.50 |
1.63 |
3.06 |
31⁄2 |
9.00 |
1.12 |
5.50 |
8 |
0.88 |
7.25 |
4.07 |
3.55 |
5.25 |
4.00 |
1.69 |
3.13 |
4 |
10.00 |
1.19 |
6.19 |
8 |
0.88 |
7.88 |
4.57 |
4.03 |
5.75 |
4.50 |
1.82 |
3.32 |
5 |
11.00 |
1.31 |
7.31 |
8 |
0.88 |
9.25 |
5.66 |
5.05 |
7.00 |
5.56 |
1.94 |
3.82 |
6 |
12.50 |
1.38 |
8.50 |
12 |
0.88 |
10.62 |
6.72 |
6.07 |
8.12 |
6.63 |
2.00 |
3.82 |
8 |
15.00 |
1.56 |
10.62 |
12 |
1.00 |
13.00 |
8.72 |
7.98 |
10.25 |
8.63 |
2.38 |
4.32 |
10 |
17.50 |
1.81 |
12.75 |
16 |
1.12 |
15.25 |
10.88 |
10.02 |
12.62 |
10.75 |
2.56 |
4.56 |
12 |
20.50 |
1.94 |
15.00 |
16 |
1.25 |
17.75 |
12.88 |
12.00 |
14.75 |
12.75 |
2.82 |
5.06 |
14 |
23.00 |
2.06 |
16.25 |
20 |
1.25 |
20.25 |
14.14 |
13.25 |
16.75 |
14.00 |
2.94 |
5.56 |
16 |
25.50 |
2.19 |
18.50 |
20 |
1.38 |
22.50 |
16.16 |
15.25 |
19.00 |
16.00 |
3.19 |
5.69 |
18 |
28.00 |
2.31 |
21.00 |
24 |
1.38 |
24.75 |
18.18 |
17.25 |
21.00 |
18.00 |
3.44 |
6.19 |
20 |
30.50 |
2.44 |
23.12 |
24 |
1.38 |
27.00 |
20.20 |
19.25 |
23.12 |
20.00 |
3.69 |
6.32 |
22 |
33.00 |
2.57 |
25.25 |
24 |
1.63 |
29.25 |
22.22 |
21.25 |
25.25 |
22.00 |
3.93 |
6.43 |
24 |
36.00 |
2.69 |
27.62 |
24 |
1.63 |
32.00 |
24.25 |
23.25 |
27.62 |
24.00 |
4.13 |
6.56 |
Pressure Rating Of ANSI B16.5 Flange
Temperature |
||||||||
FLANGE TABLE |
-10°C to 200°C |
250°C |
300°C |
350°C |
400°C |
425°C |
450°C |
475°C |
6 |
6 |
5.5 |
5 |
– |
– |
– |
– |
– |
10 |
10 |
9 |
8 |
7 |
6 |
– |
– |
– |
16 |
16 |
15 |
13 |
11 |
9 |
– |
– |
– |
25 |
25 |
24 |
21 |
17 |
14 |
12 |
9 |
6 |
40 |
40 |
38 |
33 |
28 |
23 |
20 |
15 |
10 |
64 |
64 |
61 |
53 |
44 |
36 |
32 |
24 |
16 |
100 |
100 |
95 |
83 |
70 |
57 |
50 |
37 |
25 |
160 |
160 |
152 |
132 |
112 |
92 |
80 |
60 |
40 |
Reference Standards
ASME B16.5 Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24
ASME B16.47 Large Diameter Steel Flanges: NPS 26 Through NPS 60
ASME B16.48 Line blanks
ASME B16.36 Orifice Flanges
MSS SP-6 Standard Finishes for Contact Faces of Pipe Flanges and Connecting-End Flanges of Valves and Fittings
ASME B16.20 Metallic Gaskets for Pipe Flanges: Ring-Joint, Spiral-Wound, and Jacketed
ASME B16.21 Nonmetallic Flat Gaskets for Pipe Flanges
ASME B18.2.1 Square and Hex Bolts and Screws, (Inch Series)
ASME B18.2.2 Square And Hex Nuts (inch Series)
ASTM A193 Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications
ASTM A194 Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both
EN 1092 Flanges and their joints — Circular flanges for pipes,valves, fittings and accessories, PN designated —
Part 1: Steel flanges;
Part 2: Cast iron flanges;
Part 3: Copper alloy flanges;
Part 4: Aluminum alloy flanges.
GB/T 9112-2010 Types and parameters for steel pipe flanges
GB/T 9113-2010 Integral steel pipe flanges
GB/T 9114-2010 Hubbed screwed steel pipe flanges
GB/T 9115-2010 Steel pipe welding neck flanges
GB/T 9116-2010 Hubbed slip-on-welding steel pipe flanges
GB/T 9117-2010 Hubbed socket welding steel pipe flanges
GB/T 9118-2010 Loose hubbed steel pipe flanges with welding neck collor
GB/T 9119-2010 Slip-on-welding plate steel pipe flanges
GB/T 9120-2010 Loose plate steel pipe flanges with weld-neck collar and with weld ring neck
GB/T 9121-2010 Loose plate steel pipe flanges with weld-on collar
GB/T 9122-2010 Loose plate steel pipe flanges with lapped pipe end and pressed collar with long neck
GB/T 9123-2010 Steel pipe blank flanges
GB/T 9124-2010 Specification for steel pipe flanges
GB/T 13402-2010 Large diameter steel pipe flanges
HG/20592-2009 Steel pipe flanges(PN designated)
HG/20615-2009 Steel pipe flanges(Class designated)
HG/20623-2009 Large Diameter Steel pipe flanges(Class designated)
