U bend tubes

U bend tubes

 We bring forth an exclusive range of U-bend tubes, which are known for their superior quality and excellent functionality.

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.
 
Application: Boilers, heat exchangers, super heaters, condensers
 
U bend tubes, U-shape tube, Heat exchanger tube, Tubes for Heat Exchanger and Condensers, Seamless tubes
 
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:
U bend tubes, 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.
  • Thereafter pickled, dried, marked and packed.
Feedwater Heater Tubes 
Standard:ASME SA556 Chemical Compostion
Grade C % Si % Mn % P % S %
B2 0.27 max 0.10 min 0.29-0.93 0.030 max 0.030 max
C2 0.30 max 0.10 min 0.29-1.06 0.030 max 0.030 max

Mechanical Properties
Grade Tensile Strength MPA Yield Strength MPA Hardness HRB
B2 410 min 260 min 79 min
C2 480 min 280 min 89 min
 

Product Origin:  
Model Number:  
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Company Name:  Sunny  Steel Enterprise Ltd.
Contact Person:  Sum Xu
Address:  No. 273, Siping Road, Shanghai, 200081, China
Zip:  200081
Telephone:  0086-21-33780199
Fax:  0086-21-61851035
E-mail:  sumxu@163.com | sales@sunnysteel.com
Website: http://sunnysteel.tradeee.com  | http://www.sunnysteel.com>

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