Stainless Steel 316 EFW Pipe manufacturer in India
Stainless Steel Efw Welded Pipe is a type of stainless steel pipes that is produced through electric fusion welding. The electric fusion welding is a process in which high voltage electricity is passed onto the material to heat and melt it. The Stainless Steel EFW Pipe Manufacturers produce these pipes so that other welding materials are not necessary to make the pipes through welding. And since the electric fusion welding does not involve other materials, the Efw SS Pipe can usually be manufactured from 6 inches up to 100 inches in diameter. There are different grades of stainless steel material that can produce pipes in this method.
| ASME and ASTM designation |
ASTM A312 / ASTM SA312 |
| ASME / ANSI Standard |
ANSI/ASME B36.19M, ANSI/ASME B36.10M |
| Available Grades |
- ASTM A312 (TP304/304L, TP316/316L, TP321, TP321H, TP347, TP347H)
- ASTM A790
- ASTM A358 (TP304/304L, TP316/316L, TP321, TP321H, TP347, TP347H)
- ASTM A928 (UNS S31803, UNS S32750, UNS S32760)
|
| Available Forms and Types |
Hydraulic, Square, Round, Hex, Rectangle, Honed |
| Manufacturing Type |
Welded, 100% X Ray Welded, Fabricated, ERW, CDW |
| Pipe End Type Abbreviations |
Beveled end, Bevel large end, Bevel both ends, Plain One End, Plain Both Ends, Bevel one end, Bevel small end, Treaded On End, Treaded Both Ends, Beveled One End |
| Types of Technical Delivery Conditions |
Cold Drawn, Annealed and Pickled, Bright Annealed, Polished |
| Surface Finish and Coating |
2B, No.4, No.1, No.8 Mirror Finish or custom Finish as per customer Requirements |
| Schedule (SCH) |
SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Offering value-added services |
Grooving, Export Packaging, Material testing, Polishing, Export Documentation, Threading, Machining, Ultrasonic Testing, Customer Tagging/ Marking, Non Destructive, Threading, Beveling, MTR’s Available, Cutting, Destructive, Color Coding |
| ERW full form |
Electric resistance welding (ERW), View Stainless Steel ERW Pipe for detailed information |
| EFW full form |
Electric Fusion Welding (EFW) |
| Specification of ERW & EFW |
ASME 36.10, ASME 36.19, ASME B16.25, ASME B16.49 |
| ERW & EFW Advantage |
Custom size, Greater strength, Greater pressure resistant |
| ERW & EFW Disadvantage |
- Spiral pipe is difficult to weld
- It has longer weld & likely to more fail chances
- Not suitable for pigging operations
|
Stainless steel and other metallic pipes are in use in many industries and applications. The metal pipes are made through various processes. There are hot rolling, cold drawing, electric resistance welding and electric fusion welding procedures. The electric fusion welding is done by heating up the metal in the electrode through electric fusion until it melts and then making up the pipe.
Since the material is fully melted, pressurization is not required after the process. X ray welding is relatively new in the electric fusion welding technology. X-rays require special conditions to be used. So the room requirements are higher and costly with X-ray welding. But as a compliment, the X-rays focus on smaller spot with accuracy and can melt the metal faster. This allows the impacted zone to be as minimal as possible.
So the mechanical properties of the material remain intact for the most part. Usually with electric fusion welding there could be a small deformation of the pipes. With X-rays, the deformation is little to none. So the pipe does not need additional treatments in terms of wall thickness, absolute roughness or the shape. For these reasons, manufacturers are turning to X-ray welding for efw pipes.
