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  • Austenitic & Martensitic Stainless Steel U Bent tube
  • Austenitic & Martensitic Stainless Steel U Bent tube
  • Austenitic & Martensitic Stainless Steel U Bent tube
  • Austenitic & Martensitic Stainless Steel U Bent tube
  • Austenitic & Martensitic Stainless Steel U Bent tube
  • Austenitic & Martensitic Stainless Steel U Bent tube

Austenitic & Martensitic Stainless Steel U Bent Tube

U bending tube is carried out by cold working method and is being done to the necessary bend radius as per client drawings. U-bend tube/pipe can be manufactured from an extensive range of pipe materials that contain high and low yield stainless steels, alloy steels, carbon steels, Monel , Inconel, hastelloy,duplex , super duplex,titanium,copper alloy and Cr-Ni alloys.
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Product Description


U bending tube is carried out by cold working method and is being done to the necessary bend radius as per client drawings. U-bend tube/pipe can be manufactured from an extensive range of pipe materials that contain high and low yield stainless steels, alloy steels, carbon steels,Monel , Inconel, hastelloy,duplex , super duplex,titanium,copper alloy and Cr-Ni alloys. Usually U-bends manufactured from seamless tube, can further be customized in terms of thicknesses and sizes as per the specific requirements of our clients. They are easy for further assemble tube bundles.

We provide U bend Tubes pipe in diverse industries for a range of applications such as in Boiler, Condensers, Super Heaters,tube bundles for Heat Exchangers, Coolers/Inter-coolers, Chiller, and so on. These are as well being used in dissimilar industries such as in Fertilizer Plants, Sugar Industry, Steel Plants,Oil & Gas plants, Chemical & Petrochemical plants, Refineries, Power plants, Renewable energy plants etc.


Production process:

straight pipe - bending before 100% flaw detection - reliable bending machine and precision bending mould - bending after the U-shaped part of the electric heating stress relief annealing - bending after 100% water pressure


STAINLESS STEEL U TUBE TOLERANCES:

Dimensional tolerances U tubes acc. to TEMA R.C.B.
1) Length of straight part -0/+5 mm
Flattening (also called “ovality”) at the bend shall not exceed 10% of the nominal tube outside diameter.
Wall thickness in bending part acc. to TEMA R.C.B 2.31
2) Minimum tube wall thickness in the bend part (T min)T(min) ≥ (SW × (2×R + D))/( 2× (R+D)
where: SW is smallest wall thickness
D Nominal outside diameter
R radius
3)Radius tolerance
1. for R 100 mm +/- 3 mm
2. for R ≥ 100 mm +/- 5 mm
3. Straightness tolerance max. 1,5 mm per 1 m
U-Tube ends: plain, verticallycut to the tube axis


Packing:

Packed in ply wooden box wrapped in plastic, and suitably protected for sea-worthily delivery or as requested.


Stainless steel U bent Tube standard and material grade:

ASTM A213 TP304/304L TP316/316L TP310S Stainless steel U Tube bundles forBoiler, Condensers, Super Heaters,Heat Exchangers, Coolers/Inter-coolers, Chiller

ASTM/ASME A/SA268 TP405, TP409, TP410, TP430,TP439, TP444 Ferritic and Martensitic Stainless Steel Seamless U Tube Tube bundles

ASTM/ASME A/SA213 TP304/304L,TP304H, TP316/316L, TP347/347H,TP316Ti, TP321/321H, TP310S  Seamless Austenitic Stainless Steel U Tubes Tube bundles

ASTM A249 TP304/304L,TP304H, TP316/316L, TP347/347H,TP316Ti, TP321/321H, TP310S Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser U Tubes bundles forBoiler, Condensers, Super Heaters,Heat Exchangers, Coolers/Inter-coolers, Chiller.

ASTM A269 TP304/304L TP316/316L Stainless Steel U Bend Heat Exchanger Tube, Boiler Tubing  Tube bundles

Monel400 U tube Tube bundles UNS N06600,625, Incoloy800/800H 825 U bend tube Tube bundles, hastelloy U bent tube Tube bundles

Duplex UNS S31803/32205 UNS S32750 U bent tube, super duplex U tube for Heat Exchanger Tube Boiler Condensers Super Heaters Coolers/Inter-coolers Chiller.

Type

Grade

Grade

Chemical Component %

C

Cr

Ni

Mn

P

S

Mo

Si

Cu

N

Other

Austenitic

201

SUS201

≤0.15

16.00-18.00

3.50-5.50

5.50-7.50

≤0.060

≤0.030

-

≤1.00

-

≤0.25

-

304

1.4301

≤0.07

17.00-19.00

8.00-10.00

≤2.00

≤0.045

≤0.030

-

≤1.00

-

-

-

304L

1.4307

≤0.030

18.00-20.00

8.00-10.00

≤2.00

≤0.045

≤0.030

-

≤1.00

-

-

-

304H

1.4948

0.04-0.10

18.00-20.00

8.00-10.00

≤2.00

≤0.045

≤0.030

-

≤1.00

-

-

-

309

1.4828

≤0.20

22.00-24.00

12.00-15.00

≤2.00

≤0.045

≤0.030

-

≤1.00

-

-

-

309S

*

≤0.08

22.00-24.00

12.00-15.00

≤2.00

≤0.045

≤0.030

-

≤1.00

-

-

-

310

1.4842

≤0.25

24.00-26.00

19.00-22.00

≤2.00

≤0.045

≤0.030

-

≤1.50

-

-

-

310S

*

≤0.08

24.00-26.00

19.00-22.00

≤2.00

≤0.045

≤0.030

-

≤1.50

-

-

-

314

1.4841

≤0.25

23.00-26.00

19.00-22.00

≤2.00

≤0.045

≤0.030

-

1.50-3.00

-

-

-

316

1.4401

≤0.08

16.00-18.50

10.00-14.00

≤2.00

≤0.045

≤0.030

2.00-3.00

≤1.00

-

-

-

316L

1.4404

≤0.030

16.00-18.00

10.00-14.00

≤2.00

≤0.045

≤0.030

2.00-3.00

≤1.00

-

-

-

316Ti

1.4571

≤0.08

16.00-18.00

10.00-14.00

≤2.00

≤0.045

≤0.030

2.00-3.00

≤1.00

-

0.1

Ti5(C+N)~0.70

317

*

≤0.08

18.00-20.00

11.00-15.00

≤2.00

≤0.045

≤0.030

3.00-4.00

≤1.00

-

0.1

-

317L

1.4438

≤0.03

18.00-20.00

11.00-15.00

≤2.00

≤0.045

≤0.030

3.00-4.00

≤1.00

-

0.1

-

321

1.4541

≤0.08

17.00-19.00

9.00-12.00

≤2.00

≤0.045

≤0.030

-

≤1.00

-

-

Ti5(C+N)~0.70

321H

*

0.04-0.10

17.00-19.00

9.00-12.00

≤2.00

≤0.045

≤0.030

-

≤1.00

-

-

Ti5(C+N)~0.70

347

1.4550

≤0.08

17.00-19.00

9.00-12.00

≤2.00

≤0.045

≤0.030

-

≤1.00

-

-

Nb≥10*C%-1.10

347H

1.494

0.04-0.10

17.00-19.00

9.00-12.00

≤2.00

≤0.045

≤0.030

-

≤1.00

-

-

Nb≥10*C%-1.10

xm-19

Nitronic50

≤0.06

20.50-23.50

11.50-13.50

4.0-6.0

≤0.045

≤0.030

1.50-3.00

≤1.00

-

0.2-0.4

Nb:0.10-0.30   V:0.10-0.30

904L

N08904

≤0.02

19.0-23.0

23.0-28.0

4.0-5.0

≤0.045

≤0.035


≤1.00


0.1

Cu:1.0-2.0















Duplex

2205

S32205

≤0.03

22.0-23.0

4.5-6.5

≤2.00

≤0.030

≤0.020

3.0-3.5

≤1.00

-

0.14-0.20


2507

S32750

≤0.03

24.0-26.0

6.0-8.0

≤1.20

≤0.035

≤0.020

3.0-5.0

≤0.80

0.5

0.24-0.32


*

S32760

≤0.03

24.0-26.0

6.0-8.0

≤1.00

≤0.030

≤0.010

3.0-4.0

≤1.00

0.5-1.00

0.2-0.3


2304

S32304

≤0.03

21.5-24.5

3.0-5.5

≤2.50

≤0.040

≤0.030

0.05-0.6

≤1.00

0.05-0.6

0.05-0.2


329

1.4460

≤0.08

23.00-28.00

2.00-5.00

≤1.00

≤0.040

≤0.030

1.00-2.00

≤0.75

-

-
















Ferrite

409

S40900

≤0.03

10.50-11.70

0.5

≤1.00

≤0.040

≤0.020

-

≤1.00

-

≤0.030

Ti6(C+N)~0.50    Nb:0.17

430

1Cr17

≤0.12

16.00-18.00

-

≤1.0

≤0.040

≤0.030

-

≤1.0

-

-

-

446

S44600

≤0.20

23.00-27.00

0.75

≤1.5

≤0.040

≤0.030

1.50-2.50

≤1.00

-

≤0.25

-

Martensite

410

1Cr13

0.08-0.15

11.50-13.50

0.75

≤1.00

≤0.040

≤0.030

-

≤1.00

-

-

-

420

2Cr13

≥0.15

12.00-14.00

-

≤1.00

≤0.040

≤0.030

-

≤1.00

-

-

-

440C

11Cr17

0.95-1.20

16.00-18.00

-

≤1.00

≤0.040

≤0.030

0.75

≤1.00

-

-

-


Specification :  

Outside Diameter

6.35 mm O.D to 76.2 mm O.D

Thickness

0.7 mm to 10 mm

Length

As per Customer requirement, Maximum upto 30Meter Long.



Standards

ASTM A213, ASME SA213,ASTM A249,ASTM/ASME A/SA789,ASTM/ASME A/SA 163,ASTM/ASME A/SA268,ASTM/ASME A/SA688/213,ASTM/ASME A/SA803,ASTM/ASME A/SA556


Type

Seamless Tubes, Welded Tubes

Grades

TP 304 Tube, TP 304L Tube, TP 316 Tube, TP 316L Tube, TP 321 Tube, TP 321H Tube, TP 347 Tube, TP 347H Tube, TP 202 Tube, JT 7 Tube, J4 1 Tube, TP 409 Tube, TP 409L Tube, TP 410 Tube, TP 430Ti Tube, TP 439 Tube


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