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ANSI/ ASME B16.5 Flange

View ASME B16 5 Class 600 Flange Dimensions, ASME B16 5 Class 300 Flanges Manufacturers

ANSI/ ASME B16.5 Flange is the specification and standard for stainless steel flanges that range between ½ inches and 24 inches in outer diameter. These are used in different types of applications such as water lines, food processing industries, power generation and sea water applications. The ANSI B16.5 flange is used to connect two parts of a piping structure together with a raised surface to allow for more attachment by welding or to have bolt holes. There are different types of flanges such as the ANSI B16.5 blind flange which is used to terminate a pipe line.

ASME B16 5 Class 600 Flange

ASME B16 5 Class 600 Flange

ASME B16 5 Class 300 Flanges

ASME B16 5 Class 300 Flanges

ANSI B16.5 flange

ANSI B16.5 flange

Check ANSI B16.5 Flange Ratings , Ask for ASME B16.5 Flange Material Price List

The blind flanges can either be welded to make a permanent closure or be bolted for a temporary closure of the pipes. The ASA B16.5 flange also can be of different types by means of production method and applications. There are socket weld, neck weld, butt weld and other types of flanges. The most commonly used ANSI b16,5 pipe flange is the buttweld flange because of its ease of application. Sometimes when the application needs a stronger connection through welding of the flange, the ASME B16.5 weld neck flange is deemed suitable. Please make sure to know all about your flanges by contacting us.

ANSI/ ASME B16.5 Flange
ANSI B16.5 Flange

Specification of ANSI/ ASME B16.5 Flange

ASME B16 5 Flange Size Chart 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
ANSI B16.5 Flange Standards ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flange, ASME Flange, BS Flange, DIN Flange, EN Flange, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15,
API7S-43, API605, EN1092
ANSI B16.5 Flange Pressure Rating ANSI Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
ANSI B16.5 Flange Pressure Calculation in DIN 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64
JIS 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K
UNI 6Bar 10Bar 16Bar 25Bar 40Bar
EN 6Bar 10Bar 16Bar 25Bar 40Bar
Coating Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized
Most common types of ANSI B16.5 Forged / Threaded / Screwed / Plate
Test Certificates EN 10204/3.1B
Raw Materials Certificate
100% Radiography Test Report
Third Party Inspection Report, etc
Production technique
  • Forged, Heat treated and machined
Connect Type/ Flange Face Type Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, , Groove
Special design As per your drawing

AS, ANSI, BS, DIN and JIS
15 NB (1/2″) to 200 NB (8″)
Equal and Reducing Configurations

Test Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector
Equipment Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc
Origin Indian / West Europe / Japan / USA / Korean
Manufacturer of ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc.
ANSI B16.5: -BS Flange, EN Flange, API 6A Flange, ANSI Flange, ASME Flange, DIN Flange, EN1092-1 Flange, UNI Flange, JIS/ KS Flange, BS4504 Flange, GB Flange, AWWA C207
Flange, GOST Flange, PSI Flange
ANSI B16.5 Flange Uses & application
  • Bitumen upgraders.
  • Heavy oil refineries.
  • Nuclear power (mostly seamless).
  • Petrochemicals and acids.
Export to Ireland, Singapore, Indonesia, Ukraine, Saudi Arabia, Spain, Canada, USA, Brazil, Thailand, Korea, Iran, India, Egypt, Oman, Dubai, Peru, etc
Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175

ASME B16.5 Pipe Flanges and Flanged Fittings Can be Manufactured in Range of NPS 1/2 through NPS 24 Inch

Price List of ASME B16.5 Flange

ASME B16.5 Class 150 Flange Flange ASME B16.5 Flanges Price in India ASME B16.5 Flanges Price in USD ASME B16.5 Flanges Price in UAE Dirham
1.1/2NB 300LB SCH XS WELD NECK FLANGE ASTM/ASME SA 105N ASME B16.5 NACE MR.01.75 INR 2,332 / Unit USD $ 32.58 /Unit UAE Dirham 119.67
FLANGE 1/2 300 SCH 160 WNRF A105N ASME B16.5 INR 830 / Unit USD $ 11.60 / Unit UAE Dirham 42.59
FLANGE 1/2 300 SCH 160 WNRF A105N ASME B16.5 INR 830 / Unit USD $ 11.60 / Unit UAE Dirham 42.59
DUPLEX SS FLANGE LWNRF SA182 GR. F51 (UNSS31803) NPS 1.5 (DN40) X 18 MM THK X CLASS 600 ASME B16.5 HUB OD 70 MM X ID 34 INR 19,125 / Unit USD $ 267.20 / Unit UAE Dirham 981.42

Material of ANSI B16.5 Flange

Carbon Steel ASME B16.5 Flange ASTM/ASME A/SA105 A/SA105N & A/SA216-WCB, DIN 1.0402, DIN 1.0460, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, High Yield CS ASTM A694 / A694 (F52 F56 F60 F65 F70 F80)
Stainless Steel ASME B16.5 Flange ASTM/ASME A/SA182 F304, F304L, F316, F316L, ASTM/ASME A/SA351 CF8, CF3, CF8M, CF3M, DIN 1.4301, DIN 1.4306, DIN 1.4401, DIN 1.4404, DIN 1.4308, DIN 1.4408, DIN 1.4306, DIN 1.4409
Alloy Steel ASME B16.5 Flange ASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91
Titanium ANSI B16.5 Flange ASTM B381 / ASME SB381, Titanium Gr. 1, Titanium Gr. 2, Titanium Gr. 4, Titanium Gr. 5, Titanium Gr. 7
ASTM  R50250/GR.1 | R50400/GR.2 | R50550/GR.3 | R50700/GR.4 | GR.6 |R52400/GR.7 |
R53400/GR.12 | R56320/GR.9 |R56400/GR.5
Copper ASME B16.5 Flange T1, T2, C10100, C10200, C10300, C10400, C10500, C10700, C10800, C10910,C10920, TP1, TP2, C10930, C11000, C11300, C11400, C11500, C11600, C12000,C12200, C12300, TU1, TU2, C12500, C14200, C14420, C14500, C14510, C14520, C14530, C17200, C19200,
C21000, C23000, C26000, C27000, C27400, C28000, C33000, C33200, C37000, C44300, C44400, C44500, C60800, C63020, C68700, C70400, C70600, C70620, C71000, C71500, C71520, C71640, etc
Copper Nickel ASME B16.5 Flange ASTM / ASME SB 61 / 62 / 151 / 152, Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C71640
Brass ASME B16.5 Flange 3602 / 2604 / H59 / H62 / etc.
Inconel ANSI B16.5 Flange ASTM B564 / ASME SB564, Inconel 600, 601, 625, 718, 783, 690, x750 ASME B16.5
Hastelloy ASME B16.5 Flange ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X Flange
Monel ASME B16.5 Flange ASTM B564 / ASME SB564, Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500)
Alloy 20 ASME B16.5 Flange ASTM B462 / ASME SB462, Carpenter® 20 Alloy, Alloy 20Cb-3
Aluminium ASME B16.5 Flange 5052 /6061/ 6063 / 2017 / 7075 / etc.
Nickel ANSI B16.5 Flange ASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205, Nickel 205LC
Duplex ASME B16.5 Flange S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Super Duplex ASME B16.5 Flange S32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Incoloy ASME B16.5 Flange ASTM B564 / ASME SB564, Incoloy 800, 800H, 800HT (UNS N08800), 825 (UNS N08825), 925 Flange
254 Smo ANSI B16.5 Flange ASTM A182 / ASME SA182, SMO 254/6Mo, UNS S31254, DIN 1.4547
Nimonic ASME B16.5 Flange Nimonic 75, Nimonic 80A, Nimonic 90
Other ANSI B16.5 Flange material Tin bronze, Alumunum bronze, Lead bronze

ASME B16.5 Class 150 Flange Dimensions

ASME B16.5 Flange

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

ASME B16.5 Flange

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

ANSI B16.5 Class 400 Flange Dimensions

ASME B16.5 Flange

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) Dia. Hub Base (HB) Dia. Hub Top (HT) SO LTH (SL) WN LTH (WL) * WN Bore ID (WB)
12 3.75 0.56 1.38 4 0.63 2.62 0.88 1.5 0.84 0.88 2.06 *
34 4.62 0.62 1.69 4 0.75 3.25 1.09 1.88 1.05 1.00 2.25 *
1 4.88 0.69 2.00 4 0.75 3.50 1.36 2.12 1.32 1.06 2.44 *
114 5.25 0.81 2.50 4 0.75 3.88 1.70 2.50 1.66 1.12 2.62 *
112 6.12 0.88 2.88 4 0.88 4.50 1.95 2.75 1.90 1.25 2.75 *
2 6.50 1.00 3.62 8 0.75 5.00 2.44 3.31 2.38 1.44 2.88 *
212 7.50 1.12 4.12 8 0.88 5.88 2.94 3.94 2.88 1.62 3.12 *
3 8.25 1.25 5.00 8 0.88 6.62 3.57 4.62 3.50 1.81 3.25 *
312 9.00 1.38 5.50 8 1.00 7.25 4.07 5.25 4.00 1.94 3.38 *
4 10.00 1.38 6.19 8 1.00 7.88 4.57 5.75 4.50 2.00 3.50 *
5 11.00 1.50 7.31 8 1.00 9.25 5.66 7.00 5.56 2.12 4.00 *
6 12.50 1.62 8.50 12 1.00 10.62 6.72 8.12 6.63 2.25 4.06 *
8 15.00 1.88 10.62 12 1.12 13.00 8.72 10.25 8.63 2.69 4.62 *
10 17.50 2.12 12.75 16 1.25 15.25 10.88 12.62 10.75 2.88 4.88 *
12 20.50 2.25 15.00 16 1.38 17.75 12.88 14.75 12.75 3.12 5.38 *
14 23.00 2.38 16.25 20 1.38 20.25 14.14 16.75 14.00 3.31 5.88 *
16 25.50 2.50 18.50 20 1.50 22.50 16.16 19.00 16.00 3.69 6.00 *
18 28.00 2.62 21.00 24 1.50 24.75 18.18 21.00 18.00 3.88 6.50 *
20 30.50 2.75 23.12 24 1.62 27.00 20.20 23.12 20.00 4.00 6.62 *
22 33.00 2.88 25.25 24 1.75 29.25 22.22 25.25 22.00 4.25 6.75 *
24 36.00 3.00 27.25 24 1.88 32.00 24.25 27.62 24.00 4.50 6.88 *

ASME B16.5 Class 600 Blind Flange Dimensions

ASME B16.5 Flange

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) Dia. Hub Base (HB) Dia. Hub Top (HT) SO LTH (SL) WN LTH (WL) * WN Bore ID (WB)
12 3.75 0.56 1.38 4 0.63 2.62 0.88 1.50 0.84 0.88 2.06 *
34 4.62 0.62 1.69 4 0.75 3.25 1.09 1.88 1.05 1.00 2.25 *
1 4.88 0.69 2.00 4 0.75 3.50 1.36 2.12 1.32 1.06 2.44 *
114 5.25 0.81 2.50 4 0.75 3.88 1.70 2.50 1.66 1.12 2.62 *
112 6.12 0.88 2.88 4 0.88 4.50 1.95 2.75 1.90 1.25 2.75 *
2 6.50 1.00 3.62 8 0.75 5.00 2.44 3.31 2.38 1.44 2.88 *
212 7.50 1.12 4.12 8 0.88 5.88 2.94 3.94 2.88 1.62 3.12 *
3 8.25 1.25 5.00 8 0.88 6.62 3.57 4.62 3.50 1.81 3.25 *
312 9.00 1.38 5.50 8 1.00 7.25 4.07 5.25 4.00 1.94 3.38 *
4 10.75 1.50 6.19 8 1.00 8.50 4.57 6.00 4.50 2.12 4.00 *
5 13.00 1.75 7.31 8 1.12 10.50 5.66 7.44 5.56 2.38 4.50 *
6 14.00 1.88 8.50 12 1.12 11.50 6.72 8.75 6.63 2.62 4.62 *
8 16.50 2.19 10.62 12 1.25 13.75 8.72 10.75 8.63 3.00 5.25 *
10 20.00 2.50 12.75 16 1.38 17.00 10.88 13.50 10.75 3.38 6.00 *
12 22.00 2.62 15.00 20 1.38 19.25 12.88 15.75 12.75 3.62 6.12 *
14 23.75 2.75 16.25 20 1.50 20.75 14.14 17.00 14.00 3.69 6.50 *
16 27.00 3.00 18.50 20 1.63 23.75 16.16 19.50 16.00 4.19 7.00 *
18 29.25 3.25 21.00 20 1.75 25.75 18.18 21.50 18.00 4.62 7.25 *
20 32.00 3.50 23.00 24 1.75 28.50 20.20 24.00 20.00 5.00 7.50 *
22 34.25 3.75 25.25 24 1.88 30.63 22.22 26.25 22.00 5.25 7.75 *
24 37.00 4.00 27.25 24 2.00 33.00 24.25 28.25 24.00 5.50 8.00 *

ANSI B16.5 Class 900 Flange Dimensions

ASME B16.5 Flange

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)
3 9.50 1.50 5.00 8 1.00 7.50 3.57 * 5.00 3.50 2.12 4.00
4 11.50 1.75 6.19 8 1.25 9.25 4.57 * 6.25 4.50 2.75 4.50
5 13.75 2.00 7.31 8 1.38 11.00 5.66 * 7.50 5.56 3.12 5.00
6 15.00 2.19 8.50 12 1.25 12.50 6.72 * 9.25 6.63 3.38 5.50
8 18.50 2.50 10.63 12 1.50 15.50 8.72 * 11.75 8.63 4.00 6.38
10 21.50 2.75 12.75 16 1.50 18.50 10.88 * 14.50 10.75 4.25 7.25
12 24.00 3.12 15.00 20 1.50 21.00 12.88 * 16.50 12.75 4.63 7.88
14 25.25 3.38 16.25 20 1.63 22.00 14.14 * 17.75 14.00 5.12 8.38
16 27.75 3.50 18.50 20 1.75 24.25 16.16 * 20.00 16.00 5.25 8.50
18 31.00 4.00 21.00 20 2.00 27.00 18.18 * 22.25 18.00 6.00 9.00
20 33.75 4.25 23.00 20 2.13 29.50 20.20 * 24.50 20.00 6.25 9.75
24 41.00 5.50 27.25 20 2.63 35.50 24.25 * 29.50 24.00 8.00 11.50

ANSI B16.5 Class 1500 Flange Dimensions

ASME B16.5 Flange

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) Dia. Hub Base (HB) Dia. Hub Top (HT) SO LTH (SL) WN LTH (WL) * WN Bore ID (WB)
12 4.75 0.88 1.38 4 0.88 3.25 0.88 1.50 0.84 1.25 2.38 *
34 5.12 1.00 1.69 4 0.88 3.50 1.09 1.75 1.05 1.38 2.75 *
1 5.88 1.12 2.00 4 1.00 4.00 1.36 2.06 1.32 1.62 2.88 *
114 6.25 1.12 2.50 4 1.00 4.38 1.70 2.50 1.66 1.62 2.88 *
112 7.00 1.25 2.88 4 1.12 4.88 1.95 2.75 1.90 1.75 3.25 *
2 8.50 1.50 3.63 8 1.00 6.50 2.44 4.12 2.38 2.25 4.00 *
212 9.62 1.62 4.13 8 1.12 7.50 2.94 4.88 2.88 2.50 4.12 *
3 10.50 1.88 5.00 8 1.25 8.00 5.25 3.50 4.62 *
4 12.25 2.12 6.19 8 1.38 9.50 6.38 4.50 4.88 *
5 14.75 2.88 7.31 8 1.63 11.50 7.75 5.56 6.12 *
6 15.50 3.25 8.50 12 1.50 12.50 9.00 6.63 6.75 *
8 19.00 3.62 10.63 12 1.75 15.50 11.50 8.63 8.38 *
10 23.00 4.25 12.75 12 2.00 19.00 14.50 10.75 10.00 *
12 26.50 4.88 15.00 16 2.12 22.50 17.75 12.75 11.12 *
14 29.50 5.25 16.25 16 2.38 25.00 19.50 14.00 11.75 *
16 32.50 5.75 18.50 16 2.63 27.75 21.75 16.00 12.25 *
18 36.00 6.38 21.00 16 2.88 30.50 23.50 18.00 12.88 *
20 38.75 7.00 23.00 16 3.12 32.75 25.25 20.00 14.00 *
24 46.00 8.00 27.25 16 3.63 39.00 30.00 24.00 16.00 *

ASME B16.5 Class 2500 Flange Dimensions

ASME B16.5 Flange

Nominal Size Outside Diameter (OD) Min. Thickness (T) RF Dia. (R) No. of Bolt Holes Diameter of Holes Bolt Circle (BC) Dia. Hub Base (HB) Dia. Hub Top (HT) SO LTH (SL) WN LTH (WL) * WN Bore ID (WB)
12 5.25 1.19 1.38 4 0.88 3.50 1.69 0.84 1.56 2.88 *
34 5.50 1.25 1.69 4 0.88 3.75 2.00 1.05 1.69 3.12 *
1 6.25 1.38 2.00 4 1.00 4.25 2.25 1.32 1.88 3.50 *
114 7.25 1.50 2.50 4 1.12 5.13 2.88 1.66 2.06 3.75 *
112 8.00 1.75 2.88 4 1.25 5.75 3.12 1.90 2.38 4.38 *
2 9.25 2.00 3.63 8 1.12 6.75 3.75 2.38 2.75 5.00 *
212 10.50 2.25 4.13 8 1.25 7.75 4.50 2.88 3.12 5.62 *
3 12.00 2.62 5.00 8 1.38 9.00 5.25 3.50 6.62 *
4 14.00 3.00 6.19 8 1.63 10.75 6.50 4.50 7.50 *
5 16.50 3.62 7.31 8 1.88 12.75 8.00 5.56 9.00 *
6 19.00 4.25 8.50 8 2.12 14.50 9.25 6.63 10.75 *
8 21.75 5.00 10.63 12 2.12 17.25 12.00 8.63 12.50 *
10 26.50 6.50 12.75 12 2.63 21.25 14.75 10.75 16.50 *
12 30.00 7.25 15.00 12 2.88 24.38 17.38 12.75 18.25 *

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

Weight Chart Of ASME B16.5 Flange

NPS
(Inches)
DN
(mm)
FLANGE OD
A MM
FLANGE THICKNESS D
MM
SLIP ON FLANGE WEIGHT (KGS) WELD NECK FLANGE WEIGHT (KGS) BLIND FLANGE WEIGHT (KGS)
1/ 2 15 88.9 11.2 0.4 0.5 0.4
3/ 4 20 98.6 12.7 0.6 0.7 0.6
1 25 108 14.2 0.8 1 0.9
1 1/ 4 32 117.3 15.7 1 1.3 1.2
1 1/ 2 40 127 17.5 1.3 1.7 1.5
2 50 152.4 19.1 2.1 2.6 2.4
2 1/ 2 65 177.8 22.4 3.3 4.1 3.9
3 80 190.5 23.9 3.9 4.9 4.9
3 1/ 2 90 215.9 23.9 4.8 6.1 6.2
4 100 228.6 23.9 5.3 6.8 7.0
5 125 254 23.9 6.1 8.6 8.6
6 150 279.4 25.4 7.5 10.6 11.3
8 200 342.9 28.4 12.1 17.6 19.6
10 250 406.4 30.2 16.5 24 28.6
12 300 482.6 31.8 26.2 36.5 43.2
14 350 533.4 35.1 34.6 48.4 58.1
16 400 596.9 36.6 44.8 60.6 76.1
18 450 635 39.6 48.9 68.3 93.7
20 500 698.5 42.9 61.9 84.5 122.0
24 600 812.8 47.8 86.9 115 185.0