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.