| Standard: | ANSI, DIN, GB, JIS |
|---|---|
| Type: | Back-up Flange |
| Material: | Carbon,Stainless,Alloy |
| Structure: | Round |
| Connection: | Welding |
| Sealing Surface: | RF |
| Samples: |
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| Customization: |
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Suppliers with verified business licenses
Audited Supplier Back up Flanges :
Back up Flanges are widely used in special circumstances with their main advantage being that they can be attached to the pipe without welding.
We are specializing in manufacturing and exportation of steel Back up Flanges.
We can supply stainless steel, carbon steel and nickel alloy Back up Flanges.
Back up Flanges, steel Back up Flanges are available with following specifications:
Stainless Steel Back up Flanges : ASTM A 182, A 240 Back up Flanges Grade : F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L, Duplex stainless steel UNS S31803, 2205,
Super Duplex stainless steel Back up Flanges UNS S32750
Carbon Steel Back up Flanges : ASTM A 105, ASTM A 181
Alloy Steel Back up Flanges : ASTM A 182, GR F1, F11, F22, F5, F9, F91
Nickel Alloys Back up Flanges: Monel 400 & 500, Inconel 600 & 625, Incolloy 800, 825,
Hastelloy C22, C276
Copper Alloys Back up Flanges Copper, Brass,etc
Back up Flanges Size : 1/8" NB TO 48"NB.
Back up Flanges Class : 150#, 300#,400 #,600#,900#, 1500# & 2500 #.
| Nominal Pipe Size |
Outside Diameter (OD) |
Inside Diameter (ID) |
Thickness (T) |
Bolt Circle (BC) |
Hole Diameter |
No. of Bolt Holes |
45 Degree Bevel (B) |
Approx. Weight (lbs) |
| Drilling Pattern - 150# | ||||||||
| 2 | 6.00 | 2.46 | 0.500 | 4.75 | 0.750 | 4 | 0.250 | 2.9 |
| 2 1/2 | 7.00 | 3.00 | 0.500 | 5.50 | 0.750 | 4 | 0.250 | 4.2 |
| 3 | 7.50 | 3.60 | 0.500 | 6.00 | 0.750 | 4 | 0.250 | 4.4 |
| 4 | 9.00 | 4.60 | 0.500 | 7.50 | 0.750 | 8 | 0.250 | 5.6 |
| 5 | 10.00 | 5.69 | 0.500 | 8.50 | 0.875 | 8 | 0.250 | 6.9 |
| 6 | 11.00 | 6.75 | 0.625 | 9.50 | 0.875 | 8 | 0.250 | 9.1 |
| 8 | 13.50 | 8.75 | 0.625 | 11.75 | 0.875 | 8 | 0.312 | 12.9 |
| 10 | 16.00 | 10.95 | 0.625 | 14.25 | 1.000 | 12 | 0.312 | 16.2 |
| 12 | 19.00 | 12.95 | 0.750 | 17.00 | 1.000 | 12 | 0.312 | 29.3 |
| 14 | 21.00 | 14.20 | 0.750 | 18.75 | 1.125 | 12 | 0.312 | 36.2 |
| 16 | 23.50 | 16.20 | 0.750 | 21.25 | 1.125 | 16 | 0.375 | 42.0 |
| 18 | 25.00 | 18.20 | 0.750 | 22.75 | 1.250 | 16 | 0.375 | 42.3 |
| 20 | 27.50 | 20.25 | 0.750 | 25.00 | 1.250 | 20 | 0.375 | 49.7 |
| 22 | 29.50 | 22.25 | 1.000 | 27.25 | 1.375 | 20 | 0.375 | 73.7 |
| 24 | 32.00 | 24.25 | 1.000 | 29.50 | 1.375 | 20 | 0.375 | 86.4 |
| 26 | 34.25 | 26.25 | 1.000 | 31.75 | 1.375 | 24 | 0.375 | 97.5 |
| 30 | 38.75 | 30.38 | 1.000 | 36.00 | 1.375 | 28 | 0.375 | 113.1 |
| 32 | 41.75 | 32.38 | 1.125 | 38.50 | 1.625 | 28 | 0.375 | 153.4 |
| 36 | 46.00 | 36.38 | 1.125 | 42.75 | 1.625 | 32 | 0.375 | 175.5 |
Suppliers with verified business licenses
Audited Supplier 
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