REPUTE STEEL ENGINEERING COMPANY | Manufacturer & Exporter in India

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Threaded Flanges



OUR BROCHURES


Threaded Flanges Manufacturer – Repute Steel & Engineering Company


Threaded Flanges are a type of pipe flange commonly used for connecting pipes in low-pressure, non-critical applications. They are designed with threads on the inside of the flange bore, which allows the flange to be screwed onto a pipe without the need for welding. This feature makes threaded flanges ideal for systems where welding is not feasible, such as in explosive atmospheres or with materials that are sensitive to high temperatures.


These flanges are manufactured in accordance with industry standards such as ANSI B16.5, with pressure classes ranging from Class 150 to Class 2500, and are available in a variety of materials, including stainless steel, carbon steel, and alloy steel. Threaded flanges are offered in different facing types, such as raised face (RF) or flat face (FF), to suit different installation requirements. They are typically used in applications where frequent disassembly or maintenance is required, like plumbing systems, compressed air lines, and industrial processing plants.


Threaded flanges are available in a range of sizes from NPS 1/2" to NPS 24". Their key advantage is that they allow for easy installation without specialized tools, reducing downtime and installation costs. However, they are recommended primarily for low-pressure and low-temperature applications since threads are more prone to leaks under high pressure compared to welded joints. These flanges are widely used in industries such as petrochemical, oil & gas, water treatment, and chemical processing.


Specification of Threaded Flange


ASME B16.5 Threaded Flanges Size Chart 1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Threaded pipe flange Standards ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, 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
JIS 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K Screwed Flanges
UNI 6Bar 10Bar 16Bar 25Bar 40Bar Threaded pipe flange
Screwed Flanges Pressure Calculation in DIN 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 Bsp Threaded Flange
Bsp Threaded Flange Pressure Rating ANSI Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS Pn16 Threaded Flange
EN 6Bar 10Bar 16Bar 25Bar 40Bar Reducing Threaded Flange
Most common types of Carbon Steel Threaded Flange Forged / Threaded / Screwed / Plate
Production technique
  • Forged, Heat treated and machined
Test Certificates EN 10204/3.1B
Raw Materials Certificate
100% Radiography Test Report
Third Party Inspection Report, etc
Coating Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Threaded Flanges
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
Threaded pipe flange Uses & application
  • Bitumen upgraders.
  • Heavy oil refineries.
  • Nuclear power (mostly seamless).
  • Petrochemicals and acids.
Manufacturer of

ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc.
Bsp Threaded Flange: -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

  • B.S: BS4504 , BS3293, BS1560, BS10
  • AS 2129: Table D; Table E; Table H
  • ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
  • ANSI : ANSI B16.5, ANSI B16.47(API605), MSS SP44, ANSI B16.36, ANSI B16.48
  • ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
  • American standard (ANSI)
  • German (DIN)
  • British standard (BS)
  • DIN: DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638 Reducing Threaded Flange
  • The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276
Export to Ireland, Singapore, Saudi Arabia, Spain, Dubai, Indonesia, Ukraine, India, Iran, Canada, USA, Brazil, Peru, Thailand, Korea, Egypt, Oman, etc
Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175

Material of Threaded Flanges


Carbon Steel Pn16 Threaded Flange
  • A105 Threaded Flanges
  • A350 LF2 Screwed Flanges
Austenitic Stainless Steel Square Threaded Flange
  • A182 Gr F304 Reducing Threaded Flange
  • A182 Gr F316 Screwed Flanges
  • A182 Gr F321 Bsp Threaded Flange
  • A182 Gr F347 Threaded Flanges
  • A182 Gr F304L Threaded pipe flange
  • A182 Gr F316L Pn16 Threaded Flange
  • A182 Gr F317 Screwed Flanges
  • A182 Gr F317L Bsp Threaded Flange
  • A182 Gr F321 Threaded pipe flange
  • A182 Gr F310 Square Threaded Flange
  • A182 Gr 347 Threaded Flanges
Alloy Steel High-Temp Screwed Flanges
  • A182 Gr F1 Threaded pipe flange
  • A182 Gr F11 Bsp Threaded Flange
  • A182 Gr F12 Pn16 Threaded Flange
  • A182 Gr F22 Threaded Flanges
  • A182 Gr F5 Square Threaded Flange
  • A182 Gr F9 Screwed Flanges
Alloy Steel Low-Temp Reducing Threaded Flange
  • A350 Gr LF2 Bsp Threaded Flange
  • A350 Gr LF3 Threaded Flanges
Nickel Alloy Bsp Threaded Flange
  • ASTM B564 Square Threaded Flange
  • ASTM B564 UNS N06600 Bsp Threaded Flange
  • ASTM B564 UNS N06625 Reducing Threaded Flange
  • ASTM B564 UNS No4400 Screwed Flanges
  • ASTM B564 UNS N08810 Bsp Threaded Flange
  • ASTM B564 UNS N08811 Threaded pipe flange
  • ASTM B564 UNS N08825 Threaded Flanges
  • ASTM B564 UNS N04400 Screwed Flanges
  • ASTM B564 UNS N10276 Pn16 Threaded Flange
  • ASTM B564 UNS N10665 Square Threaded Flange
Titanium Reducing Threaded Flange
  • ASTM B381 Grade F2 Square Threaded Flange
  • ASTM B381 F5 Pn16 Threaded Flange
  • ASTM B381 F3 Threaded Flanges
  • ASTM B381 F12 Screwed Flanges
  • ASTM B381 F7 Bsp Threaded Flange
  • Other grades: ASTM B381 F1, F2, F2H, F3, F4, F5, F6, F7, F7H, F9, F10, F11, F12, F13, F14, F15, F16, F16H, F17, F18, F19, F20, F21, F23, F24, F25, F26 , F26H, F27, F28, F29, F30, F31, F32, F33, F34, F35, F36, F37, F38 Threaded pipe flange


Threaded Flange Types


AWWA C207 Class d threaded flange adapter

AWWA C207 Class d threaded flange adapter


Forged Threaded Male & Female Flange

Forged Threaded Male & Female Flange


EN 1092 1 Square Threaded Flange

EN 1092 1 Square Threaded Flange


Stainless Steel Threaded Flange

Stainless Steel Threaded Flange


Threaded Flanges PN16

Threaded Flanges PN16


Brass Threaded Pipe Flange

Brass Threaded Pipe Flange


ASTM A182 F316 Reducing Threaded Flange

ASTM A182 F316 Reducing Threaded Flange


ASME B16.5 Threaded Flange

ASME B16.5 Threaded Flange


ANSI B16.5 Screwed Pipe Flange

ANSI B16.5 Screwed Pipe Flange


ASTM A694 F42 npt threaded Flanges

ASTM A694 F42 npt threaded Flanges


ASME B16.47 Series b NPT Threaded Flanges

ASME B16.47 Series b NPT Threaded Flanges


MSS SP-44 threaded lap joint flange

MSS SP-44 threaded lap joint flange


Class 300 Threaded Flange Dimensions

Class 300 Threaded Flange Dimensions


ASME B16.47 Series a Slip On Threaded Flange

ASME B16.47 Series a Slip On Threaded Flange


ASME B16.5 Screwed Flange

ASME B16.5 Screwed Flange


ANSI 150 Threaded Flange Dimensions

ANSI 150 Threaded Flange Dimensions




Stainless Steel Threaded Flange Dimensions


Pipe Size

(NPS)

 Outside Diameter of Flange

A

 Diameter of Raised Face

B

 Thickness of Flange

C

 Diameter of Hub at Base

J

 Length of Hub

L

 Minimum Thread Length

N

 Number of Bolt Holes

Approx. Weight

(Lbs.)
1/2 3 1/2 1 3/8 7/16 1 3/16 5/8 5/8 4 2
3/4 3 7/8 1 11/16 1/2 1 1/2 5/8 5/8 4 2
1 4 1/4 2 9/16 1 15/16 11/16 11/16 4 2
1 1/4 4 5/8 2 1/2 5/8 2 5/16 13/16 13/16 4 3
1 1/2 5 2 7/8 11/16 2 9/16 7/8 7/8 4 3
2 6 3 5/8 3/4 3 7/16 1 1 4 5
2 1/2 7 4 1/8 7/8 3 9/16 1 1/8 1 1/8 4 7
3 7 1/2 5 15/16 4 1/4 1 3/16 1 3/16 4 8
3 1/2 8 1/2 5 1/2 15/16 4 13/16 1 1/4 1 1/4 8 11
4 9 6 3/16 15/16 5 5/16 1 5/16 1 5/16 8 13
5 10 7 5/16 15/16 6 7/16 1 7/16 1 7/16 8 15
6 11 8 1/2 1 7 9/16 1 9/16 1 9/16 8 19
8 13 1/2 10 5/8 1 1/8 9 11/16 1 3/4 1 3/4 8 30
10 16 12 3/4 1 3/16 12 1 15/16 1 15/16 12 43
12 19 15 1 1/4 14 3/8 2 3/16 2 3/16 12 64
14 21 16 1/4 1 3/8 15 3/4 2 1/4 2 1/4 12 85
16 23 1/2 18 1/2 1 7/16 18 2 1/2 2 1/2 16 93
18 25 21 1 9/16 19 7/8 2 11/16 2 11/16 16 120
20 27 1/2 23 1 11/16 22 2 7/8 2 7/8 20 155
22 29 1/2 25 1/4 1 13/16 24 3 1/8 3 1/8 20 159
24 32 27 1/4 1 7/8 26 1/8 3 1/4 3 1/4 20 210


ANSI 150 Threaded Flange Dimensions


Drilling
Nominal Bore Threaded Flanges Dia.(D) Thick.(E) Dia.(F) Dia.(B) Height1(H) Nbr Holes Dia.(C)
1/2″ 90 9.6 35.05 30 14 4 15.87 60.3
3/4″ 100 11.2 42.92 38 14 4 15.87 69.9
1″ 110 12.7 50.80 49 16 4 15.87 79.4
1 1/4″ 115 14.3 63.50 59 19 4 15.87 88.9
1 1/2″ 125 15.9 73.15 65 21 4 15.87 98.4
2″ 150 17.5 91.94 78 24 4 19.05 120.7
2 1/2″ 180 20.7 104.65 90 27 4 19.05 139.7
3″ 190 22.3 127.00 108 29 4 19.05 152.4
3 1/2″ 215 22.3 139.70 122 30 8 19.05 177.8
4″ 230 22.3 157.22 135 32 8 19.05 190.5
5″ 255 22.3 185.67 164 35 8 22.22 215.9
6″ 280 23.9 215.90 192 38 8 22.22 241.3
8″ 345 27.0 269.75 246 43 8 22.22 298.5
10″ 405 28.6 323.85 305 48 12 25.40 362.0
12″ 485 30.2 381.00 365 54 12 25.40 431.8
14″ 535 33.4 412.75 400 56 12 28.57 476.3
16″ 595 35.0 469.90 457 62 16 28.57 539.8
18″ 635 38.1 533.40 505 67 16 31.75 577.9
20″ 700 41.3 584.20 559 71 20 31.75 635.0
24″ 815 46.1 692.15 663 81 20 34.92 749.3


Carbon Steel Threaded Flanges Class 300 Lbs Dimensions


Drilling
Nominal Bore Threaded Flanges Dia.(D) Thick.(E) Dia.(F) Dia.(B) Dia.(A) Height1(H) Nbr Holes Dia.(C)
1/2″ 95 12.7 35.05 38 23.6 21 4 15.87 66.7
3/4″ 115 14.3 42.92 48 29.0 24 4 19.05 82.6
1″ 125 15.9 50.80 54 35.8 25 4 19.05 88.9
1 1/4″ 135 17.5 63.50 64 44.4 25 4 19.05 98.4
1 1/2″ 155 19.1 73.15 70 50.3 29 8 22.22 114.3
2″ 165 20.7 91.94 84 63.5 32 8 19.05 127.0
2 1/2″ 190 23.9 104.65 100 76.2 37 8 22.22 149.2
3″ 210 27.0 127.00 117 92.2 41 8 22.22 168.3
3 1/2″ 230 28.6 139.70 133 104.9 43 8 22.22 184.2
4″ 255 30.2 157.22 146 117.6 46 8 22.22 200.0
5″ 280 33.4 185.67 178 144.4 49 8 22.22 235.0
6″ 320 35.0 215.90 206 171.4 51 12 22.22 269.9
8″ 380 39.7 269.75 260 222.2 60 12 25.40 330.2
10″ 445 46.1 323.85 321 276.2 65 16 28.57 387.4
12″ 520 49.3 381.00 375 328.6 71 16 31.75 450.8
14″ 585 52.4 412.75 425 360.4 75 20 31.75 514.4
16″ 650 55.6 469.90 483 411.2 81 20 34.92 571.5
18″ 710 58.8 533.40 533 462.0 87 24 34.92 628.6
20″ 775 62.0 584.20 587 512.8 94 24 34.92 685.8
24″ 915 68.3 692.15 702 614.4 105 24 41.27 812.8


Dimensions of Class 600 Threaded Flange


Drilling
Nominal Bore Threaded Flanges Dia.(D) Thick.(E) Dia.(F) Dia.(B) Dia.(A) Height1(H) Nbr Holes Dia.(C)
1/2″ 95 14.3 35.05 38 23.6 22 4 15.87 66.7
3/4″ 115 15.9 42.92 48 29.0 25 4 19.05 82.6
1″ 125 17.5 50.80 54 35.8 27 4 19.05 88.9
1 1/4″ 135 20.7 63.50 64 44.4 29 4 19.05 98.4
1 1/2″ 155 22.3 73.15 70 50.6 32 4 22.22 114.3
2″ 165 25.4 91.94 84 63.5 37 8 19.05 127.0
2 1/2″ 190 28.6 104.65 100 76.2 41 8 22.22 149.2
3″ 210 31.8 127.00 117 92.2 46 8 22.22 168.3
3 1/2″ 230 35.0 139.70 133 104.9 49 8 25.40 184.2
4″ 275 38.1 157.22 152 117.6 54 8 25.40 215.9
5″ 330 44.5 185.67 189 144.4 60 8 28.57 266.7
6″ 355 47.7 215.90 222 171.4 67 12 31.75 292.1
8″ 420 55.6 269.75 273 222.2 76 12 31.75 349.2
10″ 510 63.5 323.85 343 276.2 86 16 34.92 431.8
12″ 560 66.7 381.00 400 328.6 92 20 34.92 489.0
14″ 605 69.9 412.75 432 360.4 94 20 38.10 527.0
16″ 685 76.2 469.90 495 411.2 106 20 41.27 603.2
18″ 745 82.6 533.40 546 462.0 117 20 44.45 654.0
20″ 815 88.9 584.20 610 512.8 127 24 44.45 723.9
24″ 940 101.6 692.15 718 614.4 140 24 47.62 838.2


Threaded Flange Pressure Ratings

Maximum allowable non-shock pressure (psig) and temperature ratings for threaded flange ansi b16.5 and flanged fittings according the American National Standard ANSI B16.5 – 1988.


Maximum Allowable non-shock Pressure (psig)
Temperature
(oF)
 Pressure Class (lb)
150 300 400 600 900 1500 2500
Hydrostatic Test Pressure (psig)
450 1125 1500 2225 3350 5575 9275
-20 to 100 290 750 1000 1500 2250 3750 6250
200 260 750 1000 1500 2250 3750 6250
300 230 730 970 1455 2185 3640 6070
400 200 705 940 1405 2110 3520 5865
500 170 665 885 1330 1995 3325 5540
600 140 605 805 1210 1815 3025 5040
650 125 590 785 1175 1765 2940 4905
700 110 555 740 1110 1665 2775 4630
750 95 505 675 1015 1520 2535 4230
800 80 410 550 825 1235 2055 3430
850 65 320 425 640 955 1595 2655
900 50 225 295 445 670 1115 1855
950 35 135 185 275 410 685 1145
1000 20 85 115 170 255 430 715


Threaded Flanges PN16 Tolerances


Outside Diameter
≤ 24 = 1.6 mm | > 24 = ± 3.2 mm		 Inside Diameter
Within Limits on Boring Gauge
Diameter of Contact Face
1.6 mm Raised Face = ± 0.8 mm
6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm		 Drilling
Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm
Eccentricity of Bolt Circle with Respect to Facing
≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max.
Outside Diameter of Hub
≤ 12 = + 2.4 mm / - 1.6 mm | ≥ 14 = ± 3.2 mm		 Diameter of Counterbore
Same as forInside Diameter
Thickness
≤ 18 = + 3.2 mm / - 0 | ≥ 20 = + 4.8 mm / - 0		 Length thru Hub
≤ 18 = + 3.2 mm / - 0.8 mm | ≥ 20 = + 4.8 mm / - 1.6 mm


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