A Flange is used for connecting pipes, valves, pumps and other equipment to form a Pipe work system. It also facilitates easy access for cleaning, inspection or modification. Flanges are usually welded or screwed into such systems and then joined with bolts.
| Slip-on raised face (SORF) | Socket weld flanges |
| Blind raised face (BLRF) | Lap joint flanges |
| Weld neck raised face (WNRF) | Orifice flanges |
| Threaded flanges |
| ASME/ANSI B16.5 | (Used for upto 26 inches) |
| ASME B16.47 Series A | (Used for more than 26 inches) |
| ASME B16.47 Series B | (Used for more than 26 inches) |
Classes 150, 300, 600, 900, 1500 and 2500. Standard sealing face is Raised Face (RF). We also supply forged flanges with flat face (FF) |
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| DIN flanges | PN 10, PN 16, PN 25, PN 40 etc |
| BS 10 | TABLE-D, E, F, H |
| BS 4504 | |
This type of flange is slipped over the pipe and then fillet welded. Slip-on flanges are specified with following data Size, Rating, Material, Standard
This flange is circumferentially welded into the system at its neck and joined to a piping system by butt welding.
| Carbon Steel | Stainless Steel | Alloy Steel | |
| Slip On | NB ½” – 36” | NB ½” – 32” | NB ½” – 24” |
| Socket Weld | NB ½” – 3” | NB ½” – 3” | NB ½” – 3” |
| Weld Neck | NB ½” – 36” | NB ½” – 32” | NB ½” – 24” |
| Blind | NB ½” – 36” | NB ½” – 32” | NB ½” – 24” |
| Other | As per customer’s drawing | As per customer’s drawing | As per customer’sdrawing |
| Carbon Steel | SA105, SA 350 LFI, SA 350 LF2, SA 266 CL II |
| Stainless Steel | F1, F2, F5, F6, F9, F9I, F11, F12, F22 |
| Alloy Steel | F304, F304L, F316, F316L, F316Ti, F321, F317, F317L |
| Duplex Steel | F50 and F51 |
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