A688 & A803 U Bend Stainless Steel Tube for Heater

DONGSHANG Stainless offer A688 & A803 seamless and welded U bend stainless steel tube for feedwater heater, Austenitic stainless steel and Ferritic stainless steels, surface condition in annealing and pickling, or bright annealing finishing, used in heat exchanger, boiler, condenser, heat transfer system.

ASTM A688 covers seamless and welded Austenitic stainless steel feedwater heater tubes including stainless steel U bending tube for application in tubular feed-water heaters, the tubing sizes covered shall be 5⁄8 in to 1 in. [15.9 to 25.4 mm] inclusive outside diameter, and average or minimum wall thicknesses of 0.028 in. [0.7 mm] and heavier.

A688 U bend stainless steel tube for heater

A688 & A803 U Bend Stainless Steel Tube specification

  • Heat treatment shall be applied to the U-bend area plus approximately 6 in. [150 mm] of each leg beyond the tangent point of the U-bend after bending, if specified.
  • Straight length: max 30000 mm
  • Leg length: 12000 mm, points of tangency of the bend to the leg end
  • Bending radius: max 1500 mm
  • Manufacturing method: cold drawing, cold worked
  • Straight length equal to 2 x leg length + 3.1416 x R
U bending stainless steel tube heat treatment

Tolerance and testing

Our case in OD 19 MM X Wall thickness 2 MM of U bend stainless steel tube

Leg length Radius (mm) Bending length Straight length (mm) Quantity (pcs) Weight, (kgs/pc) Total Weight (kgs)
5800 35 109.956 11709.956 38 9.98 379.29
5800 60 188.496 11788.496 38 10.05 381.83
5800 85 267.036 11867.036 38 10.12 384.38
5800 110 345.576 11945.576 38 10.18 386.92
5800 135 424.116 12024.116 36 10.25 368.97
5800 160 502.656 12102.656 36 10.32 371.38
5800 185 581.196 12181.196 36 10.38 373.79
5800 210 659.736 12259.736 36 10.45 376.20
5800 235 738.276 12338.276 34 10.52 357.57
5800 260 816.816 12416.816 32 10.58 338.68
5800 285 895.356 12495.356 32 10.65 340.83
5800 310 973.896 12573.896 30 10.72 321.53
5800 335 1052.436 12652.436 28 10.78 301.97
5800 360 1130.976 12730.976 26 10.85 282.14
5800 385 1209.516 12809.516 24 10.92 262.05
5800 410 1288.056 12888.056 18 10.99 197.74
5800 435 1366.596 12966.596 16 11.05 176.84
5800 460 1445.136 13045.136 6 11.12 66.72