Flange manufacturer in India


Flange manufacturer in India










We keep ready stock of Industrial pipe flanges in size range of 1/2" to 48"

Industrial pipe flanges

Industrial pipe flanges

Steel flanges

Steel flanges

Companion flanges

Companion flanges

Steel flanges specification

Size range Manufacturing technique Flange threads
  • 1/2″ to 48″
  • Casting
  • Forging
  • NPT
  • BSP
  • BSPP
  • BSPT
Heat Treatment Industrial flange surfaces Dimensional standard for steel flanges
  • Normalizing
  • Annealing
  • Quenching Tempering
  • Stock Finish
  • Spiral Serrated
  • Concentric Serrated
  • Smooth Finish
  • ASME B16.5
  • MSS SP-44
  • DIN 2533
  • ASME B16.36
  • ASME B16.47
Pressure Class Connection type Surface treatment of pipe flanges
  • Class 150
  • Class 300
  • Class 1500
  • Class 2500
  • Class 600
  • Class 900
  • Raised Face (RF)
  • Lap Joint Face (LJ)
  • Large Male Female
  • Flat Face (FF)
  • Small Male Female
  • Ring Type Joint (RTJ)
  • Raw Black
  • Double Coating
  • Hot-dip Galvnized
  • Powder-coat
  • Customized
PN pressure classes Identification Markings Testing
  • PN6
  • PN25
  • PN40
  • PN10
  • PN16
  • PN64
  • Manufacturer logo / name
  • Material
  • Pressure Ratings
  • Standard
  • Temperature
  • Size
  • Chemical composition
  • Mechanical properties
  • Surface roughness
  • Metallographic inspection
  • Inspection of appearance
  • Magnetic Particle Examination
  • 100% Radiography Tested
  • Ultrasonic test

Refer dimensions and weight chart of pipe flanges

Industrial pipe flanges dimensions

Industrial pipe flanges dimensions

NPS O R D T T J X Bolt Circle Dia #/Dia of Holes a B B 3 B 2 b H L 2 L L 3 c r Thr
½ 3.50 1.38 0.38 0.38 0.44 1.19 2.38 4-0.62 0.88 0.90 0.62 0.84 1.81 0.56 0.62 0.12 0.62
¾ 3.88 1.69 0.44 0.44 0.50 1.50 2.75 4-0.62 1.09 1.11 0.82 1.05 2.00 0.56 0.62 0.12 0.62
1 4.25 2.00 0.50 0.50 0.56 1.94 3.12 4-0.62 1.36 1.38 1.05 1.32 2.12 0.62 0.69 0.12 0.69
4.62 2.50 0.56 0.56 0.62 2.31 3.50 4-0.62 1.70 1.72 1.38 1.66 2.19 0.75 0.81 0.19 0.81
5.00 2.88 0.62 0.62 0.69 2.56 3.88 4-0.62 1.95 1.97 1.61 1.90 2.38 0.81 0.88 0.25 0.88
2 6.00 3.62 0.69 0.69 0.75 3.06 4.75 4-0.75 2.44 2.46 2.07 2.38 2.44 0.94 1.00 0.31 1.00
7.00 4.12 0.75 0.81 0.88 3.56 5.50 4-0.75 2.94 2.97 2.47 2.88 2.69 1.06 1.12 0.31 1.12
3 7.50 5.00 0.81 0.88 0.94 4.25 6.00 4-0.75 3.57 3.60 3.07 3.50 2.69 1.12 1.19 0.38 1.19
8.50 5.50 0.88 0.88 0.94 4.81 7.00 8-0.75 4.07 4.10 3.55 4.00 2.75 1.19 1.25 0.38 1.25
4 9.00 6.19 0.94 0.88 0.94 5.31 7.50 8-0.75 4.57 4.60 4.03 4.50 2.94 1.25 1.31 0.44 1.31
5 10.00 7.31 0.94 0.88 0.94 6.44 8.50 8-0.88 5.66 5.69 5.05 5.56 3.44 1.38 1.44 0.44 1.44
6 11.00 8.50 1.06 0.94 1.00 7.56 9.50 8-0.88 6.72 6.75 6.07 6.63 3.44 1.50 1.56 0.50 1.56
8 13.50 10.62 1.25 1.06 1.12 9.69 11.75 8-0.88 8.72 8.75 7.98 8.63 3.94 1.69 1.75 0.50 1.75
10 16.00 12.75 1.31 1.12 1.19 12.00 14.25 12-1.00 10.88 10.92 10.02 10.75 3.94 1.88 1.94 0.50 1.94
12 19.00 15.00 1.56 1.19 1.25 14.38 17.00 12-1.00 12.88 12.92 12.00 12.75 4.44 2.12 2.19 0.50 2.19
14 21.00 16.25 1.63 1.31 1.38 15.75 18.75 12-1.12 14.14 14.18 13.25 14.00 4.94 2.19 3.12 0.50 2.25
16 23.50 18.50 1.75 1.38 1.44 18.00 21.25 16-1.12 16.16 16.19 15.25 16.00 4.94 2.44 3.44 0.50 2.50
18 25.00 21.00 1.94 1.50 1.56 19.88 22.75 16-1.25 18.18 18.20 17.25 18.00 5.44 2.62 3.81 0.50 2.69
20 27.50 23.00 2.13 1.62 1.69 22.00 25.00 20-1.25 20.20 20.25 19.25 20.00 5.62 2.81 4.06 0.50 2.88
22 29.50 25.25 2.38 1.75 1.81 24.25 27.25 20-1.38 22.22 22.25 21.25 22.00 5.82 3.07 4.25 0.50 3.13
24 32.00 27.25 2.50 1.81 1.88 26.12 29.50 20-1.38 24.25 24.25 23.25 24.00 5.94 3.19 4.38 0.50 3.25

Weight chart of flanges

NPS Threaded Slip On Lap Joint Socket Weld Weld Neck Blind
½ 1 1 1 2 2 2
¾ 2 2 2 2 2 2
1 2 2 2 2 3 2
3 3 3 3 3 3
3 3 3 3 4 4
2 5 5 5 5 6 5
8 8 8 8 10 7
3 9 9 9 9 11.5 9
12 11 11 11 12 13
4 13 13 13 13 16.5 17
5 15 15 15 15 21 20
6 19 19 19 19 26 27
8 30 30 30 30 42 47
10 43 43 43 43 54 70
12 64 64 64 64 88 123
14 90 90 105 90 114 140
16 98 106 140 98 140 180
18 130 130 160 130 165 220
20 165 165 195 165 197 285
22 185 185 245 185 225 355
24 220 220 275 220 268 430

We are reliable stockist of steel flanges from class 150 to class 2500

Steel flanges pressure rating

Temperature (𐩑F) 150# 400# 300# 900# 600# 2500# 1500#
-20 to 100 285 985 740 2220 1480 6170 3705
200 260 905 680 2035 1360 5655 3395
300 230 870 655 1965 1310 5450 3270
400 200 845 635 1900 1265 5280 3170
500 170 805 605 1810 1205 5025 3015
600 140 755 570 1705 1135 4730 2840
650 125 730 550 1650 1100 4575 2745
700 110 710 530 1590 1060 4425 2655
750 95 675 505 1520 1015 4230 2535
800 80 550 410 1235 825 3430 2055
850 65 425 320 955 640 2655 1595
900 50 305 230 690 460 1915 1150
950 35 185 135 410 275 1145 685
1000 20 115 85 255 170 715 430

Manufacturing standard of pipe flanges

  • ASME B16.5
  • ASME B16.47
Contact us if you are looking for industrial flanges manufacturers in india

Flange face finish types

  • Stock Finish
  • Smooth Finish
  • Cold Water Finish
  • Spiral Serrated Face Finish
  • Concentric Serrated Face Finish

Comman gaskets and roughness value of industrial flanges

Surface Types Maximum Roughness Value
Spiral wound gaskets. 125 to 250 µin AARH (3.2 to 6.3 µm AARH)
Ring-type joint flanges (and hard gaskets) 63 µin AARH (1.6 µm AARH)
Tongue and Groove, and small Male and Female 1 25 µ.i n. or 3. 2 µ.m AARH
Soft gaskets. 250 to 500 µin AARH (6.3 to 12.6 µm AARH)
Leading supplier and exporter of companion flanges in more than 30 countries

Available connection types of forged flanges

  • Weld Neck
  • Socket Weld
  • Lap Joint
  • Threaded
  • Slip On
  • Blind

Forged flanges size chart

NPS
(inches)
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/4 3-3/8 4 1/2 0.62 2-1/4
1/2 3-1/2 4 1/2 0.62 2-3/8
3/4 3-7/8 4 1/2 0.62 2-3/4
1 4-1/4 4 1/2 0.62 3-1/8
1-1/4 4-5/8 4 1/2 0.62 3-1/2
1-1/2 5 4 1/2 0.62 3-7/8
2 6 4 5/8 0.75 4-3/4
2-1/2 7 4 5/8 0.75 5-1/2
3 7-1/2 4 5/8 0.75 6
3-1/2 8-1/2 8 5/8 0.75 7
4 9 8 5/8 0.75 7-1/2
5 10 8 3/4 0.88 8-1/2
6 11 8 3/4 0.88 9-1/2
8 13-1/2 8 3/4 0.88 11-3/4
10 16 12 7/8 1 14-1/4
12 19 12 7/8 1 17
14 21 12 1 1.12 18-3/4
16 23-1/2 16 1 1.12 21-1/4
18 25 16 1-1/8 1.25 22-3/4
20 27-1/2 20 1-1/8 1.25 25
24 32 20 1-1/4 1.38 29-1/2