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ASME SA213,ASME SA268,ASME SA688,ASME SA790,DIN 28179 Stainless Steel U Tube

COLD DRAWN SEAMLESS STAINLESS STEEL U BEND TUBE
  • COLD DRAWN SEAMLESS STAINLESS STEEL U BEND TUBE
  • a269_TP316 stainless steel U Bend Tube
  • ASTM A688/ASME SA688 TP347H Low Pressure Feed Water Heater U Tube of Thermal Power
  • ASTM A268/ASME SA269 Ferritic and Martensitic Stainless Steel Seamless U-bent Tubes
  • asme_sb677/astm_b677_UNs N08904/904l Heat exchanger U Tube
  • U bent-tubing-for-steam-generator-nuclear-plant
  • U bent-tubing-for-steam-generator-nuclear-plant
  • ASME SA213,ASME SA268,ASME SA688,ASME SA790,DIN 28179 Stainless Steel U Tube
  • Heat Transfer Animation by Shell and Tube Heat Exchanger
Model No.︰-
Brand Name︰ASME SA213,ASME SA249,ASME SA269,ASME SA312
Country of Origin︰-
Unit Price︰US $ 9.9 / kg
Minimum Order︰200 kg
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Product Description

   

Stainless Steel U Tube

Specification Materials
ASTM A213/ASME SA213 Seamless Ferritic and Austenitic Stainless Steel U-bent Tubes TP304/304L, TP304H, TP316/316L, TP347/347H, TP316Ti, TP321/321H, TP310S
ASTM A249/ASME SA249 Welded Stainless Steel U-bent Tubes TP304, TP304L, TP316, TP316L…
ASTM A789/ASME SA789 Duplex Stainless Steel U-bent Tubes SAF2205/UNS S31803/32205, SAF2507/UNS S32750…
ASTM B163/ASME SA163 Seamless Nickel Alloy U-bent Tubes Monel400, Inconel600, 625, Incoloy800/800H, 825…
ASTM A268/ASME SA269 Ferritic and Martensitic Stainless Steel Seamless U-bent Tubes TP405, TP409, TP410, TP430
EN 10217-7 Welded Stainless Steel Tube for Pressure Purpose 321, 347, 310,UNS-S32760, S31803, S31500
ASTM A688/ASME SA688 Low Pressure Feed Water Heater U Tube of Thermal Power  304/304L/304H(1.4301/1.4306/1.4948); 316/316L(1.4401/1.4404);316Ti(1.4571); 321(1.4541);309S(1.4833);310S(1.4845); 317L(1.4438);321H(1.4878);347H(1.4550); 2205(1.4462) ; S31803,2507

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ASTM A688 / A688M covers seamless and welded Austenitic stainless steel feedwater heater tubes including stainless steel U bending tube for application in tubular feed-water heaters, surface condition in annealing and pickling, or bright annealing finishing, used in heat exchanger, boiler, condenser, heat transfer system.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.

Dimensional Tolerance

ASTM A688 U bend tube tolerance of outside should be accordance with specification A1016/M, bent portion of U tubes for R =2 X D or greater, tolerance shall deviate from the nominal diameter prior to bending by more than 10 %, if less than 2 X D is specified, tolerances could be greater, minimum wall thickness shall not exceed +20 % − 0, average wall thickness are 10 % of the nominal wall thickness, bent area wall tolerance shall not be less than value determined by the equation: 4RT/(4R+D).

Tube Leg Length Tolerance Squareness of Ends Tolerance
Leg Length, ft (m) Plus Tolerance, in (mm) Tube OD, in, (mm) Tolerance, in, (mm)
<= 20 (6) 1/8  (3.2) <=5.8 (15.9) 0.010 (0.25)
>20(6), <=30(9) 5/32  (4.0) >5.8 (15.9), <=1 (25.4) 0.016 (0.4)
>30 (9), <=40 (12.2) 3/16  (4.8)    

Technical conditions:

1.Heat treatment: Stress relive annealing of U-tubes after bending
2.Dimensional tolerances U-tubes acc. to TEMA R.C.B.
3.Length of straight part -0/+5 mm
4.Flattening (also called “ovality”) at the bend shall not exceed 10% of the nominal tube outside diameter.
5.Wall thickness in bending part acc. to TEMA RCB 2.31
6.Minimum tube wall thickness in the bend part (T min)    T(min) ≥ (SW × (2×R + D))/( 2× (R+D)
where: SW=smallest wall thickness, D=Nominal outside diameter,R=radius
7.Radius tolerance 1) for R 100 mm +/- 3 mm, 2) for R ≥ 100 mm +/- 5 mm
8.Straightness tolerance max. 1,5 mm per 1 m
9.U-Tube ends: plain, vertically cut to the tube axis
10.Repairs by welding: prohibited
11. Surface condition Finished U-tubes shall be free of scale, without scratches after bending,
12. Delivery Condition: Passivation and oiled, Black paint or varnish, Bright Annealed
13. Packing:Plastic plugs in both ends, bundles of max. 3,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper packed in wooden case

Main Testing Items and Procedure:
3. Chemical Composition Analysis Test With 100% PMI and One tube from each heat by Direct Reading Spectrometer
4. Visual inspection for waviness and cracks by Dye Penetrant Test. and Endoscope Test for Surface Quality Test:
5. 100% Hydrostatic Test: Minimum:10 Mpa-25Mpa and 100% Eddy Current Test before U bend Formed
6. Ultrasonic Test before U bend Formed subject to the MPS (Material Purchase Specification)
7. Mechanical Tests includes Tension Test, Flattening Test, FlaringTest, Hardness Test
8. Impact Test subject to Standard request
9. Grain Size Test and Intergranular Corrosion Test
10. Ultrasonic measuring of Wall Thickness
11. Stress Relieve Annealing on U bend Parts after bending
12.Air Under Water Test After Bending
13. Cotton Ball Passing Test for ID cleanness

 

Product Image

COLD DRAWN SEAMLESS STAINLESS STEEL U BEND TUBE
COLD DRAWN SEAMLESS STAINLESS STEEL U BEND TUBE

a269_TP316 stainless steel U Bend Tube
a269_TP316 stainless steel U Bend Tube

ASTM A688/ASME SA688 TP347H Low Pressure Feed Water Heater U Tube of Thermal Power
ASTM A688/ASME SA688 TP347H Low Pressure Feed Water Heater U Tube of Thermal Power

ASTM A268/ASME SA269 Ferritic and Martensitic Stainless Steel Seamless U-bent Tubes
ASTM A268/ASME SA269 Ferritic and Martensitic Stainless Steel Seamless U-bent Tubes

asme_sb677/astm_b677_UNs N08904/904l Heat exchanger U Tube
asme_sb677/astm_b677_UNs N08904/904l Heat exchanger U Tube

U bent-tubing-for-steam-generator-nuclear-plant
U bent-tubing-for-steam-generator-nuclear-plant

U bent-tubing-for-steam-generator-nuclear-plant
U bent-tubing-for-steam-generator-nuclear-plant


Heat Transfer Animation by Shell and Tube Heat Exchanger
Heat Transfer Animation by Shell and Tube Heat Exchanger

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ASTM A269 TP316/316L SEAMLESS STAINLESS STEEL TUBE
ASTM A213,ASTM A269,ASTM A312,ASTM A789,EN10216-5,EN 10297-2 Seamless SS Tube
US $ 8.85
ASTM A312 TP316/316L SEAMLESS STAINLESS STEEL TUBE
ASTM A213,ASTM A269,ASTM A312,ASTM A789,EN10216-5,EN 10297-2 Seamless SS Tube
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High_strength TP 321 stainless steel Tube 100mmThickness
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US $ 8.5
tp304l_316l_bright_annealed_tube_stainless_steel_ba_welded_tubing_for_instrumentation
ASTM A269,DIN 17455,EN 10357,EN 10217-7,NFA 49-147 BRIGHT ANNEALED(BA) SS TUBE
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