U-bend seamless tubes

U-bend seamless tubes
U-bend seamless tubes
Each U bend tube of our range is rigorously quality checked by our team of talented professionals on every stage of production to deliver the clients defect free best quality products. These U bend tubes can be custom designed in various diameters as per the requirements of our clients.
Available in different specifications, these U bend tubes can be custom designed in various diameters as per the requirements of our clients.
Application:
  • Boilers, heat exchangers, super heaters, condensers
Production Standard, Grade, Steel No:
  • ASTM A688/A688M-Welded Austentic Steel Feedwater Heater Tubes.
  • ASTM A 312/213/269,DIN 17458/2462,BS3605/1,JIS, ASME SA556 G3429/3459,ISO1129/2037/9329,GB/T14975/14976/13296 and so on.
Material:
  • TP304,TP304L,TP316,TP316L,TP321,TP310S,TP347H,TP316Ti,
  • Carbon steel
  • alloys and so on.
Proces:
  • The removal of beads is done as per standard specifications.
  • Bead is cold worked.
  • It is brought in level with the base metal.
Before heat treatment on tube mill, bead rolling is made in-line.
This will help in recrystallization of weld structure.
The weld structure will also homogenize faster in annealing process.
Length: unbending length or fix length
Mill test certificate: according to EN 10204 3.2
Packing: Wooden cases, bundle or plastic bags, plywood boxes
Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.
Features :
  • U bending is done by cold working process.
  • U bending is done to the required radius as per customer drawings.
  • The bend portion and six inch leg is stress relieved by resistance heating.
  • Inert gas (Argon) is passed through it at the required flow rate to avoid oxidation in ID.
  • The radius is checked for its OD and wall thinning with the recommended specification.
  • The physical properties and micro-structure is checked at three different position.
  • Visual inspection for waviness and cracks is done with Dye Penetrant Test.
  • Each tube is then hydro tested at the recommended pressure to check for leakage.
  • Cotton ball test is done to check the ID cleanliness of the tube.
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Sunny Steel provide a wide range of steel products as Steel pipes, Seamless tube and seamless pipes, Alloy pipes, Pipe fittings, Composite steel pipe used in the industry, construction etc.
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