Manufacturer of ANSI B16.5 / ASME B16.5 Flanges

Types of Flanges

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
(OD)
Min. Thickness
(T)
RF Dia.
(R)
No. of Bolt Holes Diameter of Holes Bolt Circle
(BC)
SO Bore ID
(SB)
WN Bore ID
(WB)
Dia. Hub Base
(HB)
Dia. of Hub Top
(HT)
SO LTH
(SL)
WN LTH
(WL)
12 3.50 0.38 1.38 4 0.62 2.38 0.88 0.62 1.19 0.84 0.56 1.81
34 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
114 4.62 0.56 2.50 4 0.62 3.50 1.70 1.38 2.31 1.66 0.75 2.19
112 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
212 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
312 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 mm

Nominal Size Outside Diameter
(OD)
Min. Thickness
(T)
RF Dia.
(R)
No. of Bolt Holes Diameter of Holes Bolt Circle
(BC)
SO Bore ID
(SB)
WN Bore ID
(WB)
Dia. Hub Base
(HB)
Dia. Hub Top
(HT)
SO LTH
(SL)
WN LTH
(WL)
12 3.75 0.50 1.38 4 0.63 2.62 0.88 0.62 1.50 0.84 0.81 2.00
34 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
114 5.25 0.69 2.50 4 0.75 3.88 1.70 1.38 2.50 1.66 1.00 2.50
112 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
212 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
312 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: Aluminium 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)