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Stainless Steel Seamless U Bend Heat Transfer Tube Annealed SA213 TP304N UNS S30451

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Stainless Steel Seamless U Bend Heat Transfer Tube Annealed SA213 TP304N UNS S30451

Brand Name : SPEZILLA

Model Number : ASME SA789

Certification : ISO9001:2008

Place of Origin : CHINA

MOQ : Negotiation

Price : Negotiation

Payment Terms : T/T, L/C

Supply Ability : 100 TONS / MONTH

Delivery Time : WITHIN 30 DAYS

Packaging Details : WOODEN BOXED

Product Name : Stainless Steel U bend Tube

Standard : ASTM A213

Materials No. : TP304N

Manufacturing : cold drawn

OD : 1/2'' - 2''

WT : 0.035'' - 0.083''

Surface : SOLUTION ANNEALED

Shape : Round

Package : Wooden Case

Application : Heat Exchanger

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Stainless Steel Seamless U Bend Heat Transfer Tube Annealed SA213 TP304N UNS S30451


U-Bent Tubes

SPEZILLA Tube heat exchanger tubes can also be supplied as 'u' bends or serpentines, manufactured according to various heat exchanger standard or to customer's own specifications.

Standard Technical Range

  • OD 9.5mm - 38.1mm
  • WT up to 6.35mm
  • Bending radii 1.25 x OD up to 1700mm
  • Bends can be supplied in accordance with TEMA R / ASTM SA/A556
  • Leg length up to 15000mm
  • Heat treatment where required by electric furnance or direct resistance
  • Hydrotesting up to 10,000 psi

Additional Testing

  • Dye penetrant of 'U' bend area
  • PMI testing
  • Heat Treatment

Heat Treatment

We are equipped to carry out heat treatment of bends plus a minimum 150mm of leg.

Spec. No. Title Scope
ASTM A 213 TubingASME SA 213 Tubing Seamless Ferritic Stainless Steel and Austenitic Stainless Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes. Pressure tubes, made from 16 grades of austenitic stainless steel and from 12 grades of ferritic Cr-Mo Alloy Steel.
ASTM A 249 TubingASME SA 249 Tubing Welded Austenitic Stainless Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes. Pressure tubes, made from austenitic stainless steels, (Types 304, 304H, 304L, 305, 309, 310, 316, 316H, 316L, 317, 321, 321H, 347, 347H, 348, 348H, and XM grades.)
ASTM A 268 TubingASME SA 268 Tubing Seamless and Welded Ferritic Stainless Steel Tubing for General Service. 15 grades of ferritic stainless steel tubing for general corrosion resistance and high temperature service. (Types 329, 405, 409, 410, 429, 430, 430Ti, 443, 446, XMs & others).
ASTM A 269 Tubing Seamless and Welded Austenitic Stainless Steel Tubing for General Service. 13 grades of austenitic stainless steel tubing for general corrosion-resisting and high-temperature service. (Types 304, 304L, 316, 316L, 317, 321, 347, 348 and XM grades).
ASTM A 270 Tubing Seamless and Welded Austenitic Stainless Steel Sanitary Tubing. Austenitic stainless steel tubing intended for use in the diary and food industry in sizes up to and including 4 in. in outside diameter.
ASTM A 312 TubingASME SA 312 Tubing Seamless and Welded Austenitic Stainless Steel Pipe. Austenitic stainless steel pipe intended for high temperature and general corrosive service. 22 grades are covered.
ASTM A 358 TubingASME SA 358 Tubing Electric-Fusion-Welded Austenitic Chromium-Nickel Alloy Steel Pipe for High-Temperature Service. For corrosion and high temperature service, normally not less than 8 in. nominal diameter. Types 304, 316, 309, 310, 321, 347, 304L, 316L, 304H, 316H.
ASTM A 376 TubingASME SA 376 Tubing Seamless Austenitic Stainless Steel Pipe for High-Temp Central-Station Service. Austenitic stainless steel pipe intended for high temperature and general corrosive service. Better surface than A312 pipe.
ASTM A 409 TubingASME SA 409 Tubing Welded Large Outside Diameter Light Wall Austenitic Chromium-Nickel Alloy Steel Pipe for Corrosive or High Temperature Service. Nominal diameter 14-30 in. in Schedules 5S and l0S. Types 304, 309, 310, 316, 317, 321, 347, 348, 304L, 316L.
ASTM A 450 TubingASME SA 450 Tubing General requirements for Alloy Steel Tubes. Common requirements for ASTM tubular specifications.
ASTM A 511 Tubing Seamless Stainless Steel Mechanical Tubing. 27 grades are covered for mechanical applications. Primarily round tubing.
ASTM A 530 TubingASME SA 530 Tubing General Requirements for Carbon, Ferritic Alloy, and Austenitic Alloy Steel Pipe. Common requirements for ASTM pipe specifications as listed.
ASTM A 554 Tubing Welded Stainless Steel Mechanical Tubing. Nineteen grades are covered for mechanical applications. Rounds, squares, rectangles, and special shapes are included.
ASTM A 632 Tubing Seamless and Welded Austenitic Stainless Steel Tubing for General Service. Small Diameter. 9 grades of austenitic stainless steel tubing for general corrosion-resisting and high-temperature service.

Standard Dimensions - U-Bent Tube
Outside diameter 6 -90 mm ¼”-3 ½”
Maximum overall length 1 - 28 m 3 - 92 ft
Bending Radius Min. 1,5 × tube diameter
Bending Radius Max. 1500 mm 4ft

Inspections and Tests - U-Bent Tube
Chemical Composition
Mechanical Properties
Hydrostatic Test
Pneumatic Test
Eddy Current Test
Dye Penetrant Test
Magnetoscopic Test

Heat Treatment Conditions
Stress-Relieved Anneal
Annealed (Bright Annealing)

Materials - U-Bent Tube
Carbon Steel SA 179 / A 179
Carbon Steel SA 210 / A 210
Carbon Steel SA 334 / A 334
Stainless Steel SA 213 / A 213
SA249 / A249
SA268 / A268
SA688 / A688
Duplex Stainless Steel SA 789 / A 789
Copper & Cu Alloys SB 111 / B 111
Titanium & Ti Alloys SB 338 / B 338
For different materials please contact our sales department.

Grade/ Material Element Composition( Max-A, Min-I)
ASTM A213/ A213M TP304N(UNS S30451) C A:0.08
Mn A:2.00
Si A:0.75
P A:0.045
S A:0.03
Cr 18-20
Ni 8-10.5
Mo --
N A:0.1-0.16
Cu --

Mechanical Properties( Mpa)

Grade/ Material Tensile Test
ASTM A213/ A213M TP304N(UNS S30451) Tensile Strength/ Mpa 550
Yield Strength/Mpa I:240
Elongation/% I:30
Hardness Rockwell B --

Stainless Steel Seamless U Bend Heat Transfer Tube Annealed SA213 TP304N UNS S30451


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