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Duplex Stainless Steel Seamless Pipe Manufacturer in India

ASTM A790 Welded Pipe and ASME SA789 Tubing Supplier in Mumbai

Great Steel & Metals is a leading Duplex Stainless Steel Pipe Manufacturer and we produce all kinds of duplex steel pipes. Duplex is an alloy material that has austenitic and ferritic steel phases in its metallurgic structure. The combination allows for the duplex steel to perform in strength and corrosion resistance properties. The Duplex Stainless Steel Seamless Pipe is cold drawn and it could be used in a number of applications that require excellent corrosion resistance, wear and tear resistance, strength and accuracy in dimensions.


Duplex Pipe

Duplex Pipe

Duplex Stainless Steel Seamless Pipe

Duplex Stainless Steel Seamless Pipe

Duplex Steel Tube

Duplex Steel Tube

ASTM A790 Welded Pipe

ASTM A790 Welded Pipe

Duplex Stainless Steel Heat Exchanger Tubes

Duplex Stainless Steel Heat Exchanger Tubes

ASTM A790 Pipe

ASTM A790 Pipe


Check Specifications of ASTM A789 Tubing and A790m Tube Dimensions

There are different duplex grades. We manufacture the standard duplex, super duplex and lean duplex grade pipes for uses in all industries. The ASTM A790 Duplex Welded Pipe Duplex Steel Tube can be seamless or straight-seam steel pipes that are used in high temperature applications. The specialty of this particular grade of duplex is that it could perform under high temperatures for a prolonged period of time without the risk of oxidation. The extended use may cause embrittlement in some grades. The ASME SA790 Duplex Stainless Steel Tubing applications therefore limit the time of exposure to high temperatures depending on the nature, standards, pipe sizes and pressure classes of the pipes used. The pipes could be heated treated for additional strength. The SS Duplex Seamless Tube produced by us are of high quality. We produce the electric resistance welded Stainless Duplex Erw Pipes for better performance. We offer a wide range of products in other duplex grades as well. We can offer the product details upon inquiry.

Duplex Stainless Steel Pipe Specification

Buy Online Duplex Stainless Steel Heat Exchanger Tubes and save up to 40%


Swg & Bwg 10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg.
Schedule SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Size 3.35 mm OD To 101.6 mm OD
Welded Tube Size 6.35 mm OD To 152 mm OD
wall thickness 0.020″ –0.220″, (special wall thicknesses available)
American Standard AISI, DIN, EN, GB, IS, JIS, ASTM, ASME Pipe
Size of Seamless Pipe 4 to 219mm W. T.: 0.5 to 20mm
Welded Pipe Size Chart 5.0 mm – 1219.2 mm
Length Single Random, Double Random, Standard & Cut length Pipe & Tube
Duplex Alloy Steel Finish Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF
Duplex Alloy Form Round, Hydraulic, ‘U’ bent or Hollow,LSAW, Boiler, Straight Pipe, Clad Pipe, Rectangular, Square Pipe Etc
DSS Value Added Service Draw & Expansion as per required Size & Length, Polish (Electro & Commercial) Annealed & Pickled Bending, Machining Etc.
Manufacturers of DSS Steel Pipe
  • Tubacex Tubos Inoxidables S.A., Spain
  • Schoeller Bleckmann, Austria
  • Seah Steel Corporation, Korea
  • Kobe Special Tube, Japan
  • Sumitomo Metals, Japan
  • Nippon Steel Corporation, Japan
  • Sanyo Special Steel, Japan
DSS Type Welded, Seamless, ERW, EFW, Fabricated Pipe, ‘U’ bent or Hollow, Hydraulic, LSAW, Boiler, Straight Tube, Tube Coil, Round, Rectangular, Square Tube etc
DSS End Plain End, Beveled End, Treaded Pipe & Tube
Material Test Certificates (MTC) Material Test Certificates (MTC) as per EN 10204/3.1B, EN 10204 3.1 and EN 10204 3.2, 100% Radiography Test Report,
Raw Materials Certificate, Third Party Inspection Report, Fumigation Certificates, Heat Treatment Charts,
Duplex Alloy Pipe HS Code Commercial Invoice, Form A for Generalized System of Preferences (GSP)
DSS Steel Application Oil Pipe & Tube, Gas Pipe & Tube, Fluid Pipe & Tube, Boiler Pipe & Tube, Heat exchanger Tube

Types of Duplex Stainless Steel Seamless Pipe

Duplex Clad Pipe

Duplex Clad Pipe

Duplex Stainless Steel Pipe

Duplex Stainless Steel Pipe

Duplex Stainless ERW Pipe

Duplex Stainless ERW Pipe

Duplex Steel Hollow Pipe

Duplex Steel Hollow Pipe

Duplex SS Welded Pipe

Duplex SS Welded Pipe

SS Duplex Round Pipe

DSS Round Pipe

Welded Duplex Alloy Tubes

Welded Duplex Alloy Tubes

Seamless Alloy Duplex Tube

Seamless Alloy Duplex Tube

DSS EFW Pipe

DSS EFW Pipe

Stainless Steel Duplex Exhaust Tube

DSS Exhaust Tube

Stainless Duplex Capillary Tube

Stainless Duplex Capillary Tube

Steel Duplex Heat Exchanger Tube

Steel Duplex Heat Exchanger Tube

DSS Steel Hot Rolled Tube

DSS Steel Hot Rolled Tube

DSS Cold Drawn Tube

DSS Cold Drawn Tube

Duplex Alloy Schedule 40 Pipe

Duplex Alloy Schedule 40 Pipe

Duplex Alloy Steel Schedule 80 Pipe

Duplex Alloy Steel Schedule 80 Pipe

Duplex Stainless Steel Seamless Pipe

Duplex Stainless Steel Seamless Pipe

Duplex Steel Seamless Tubes

Duplex Steel Seamless Tubes

ASTM A790 Pipe

ASTM A790 Pipe

Duplex Steel Boiler Tube

Duplex Steel Boiler Tube

Duplex Steel Heat Exchanger Tube

Duplex Steel Heat Exchanger Tube

ASTM a789 tubing

ASTM a789 tubing

ASME SA790M Pipe

ASME SA790M Pipe

DSS welded Pipe

DSS welded Pipe


Duplex Stainless Steel Pipe Roughness

Outside surface roughnes Inside surface roughness
RA 20 defect level max. 50 μm RA 20 defect level max. 20 μm

Duplex Steel Seamless Tubes ASTM Code

Call DSS Boiler Tubes Manufacturer in India and get Custom sizes Also Check our SMLS Duplex Pipes Price List

Specification

Allowable Outside Diameter Variation in mm

Allowable Wall Thickness Variation

Exact Length Tolerance in mm

Testing

Nominal Diameter

Over

Under

%Over

%Under

Over

Under

Flattening Test Tension Test Flare Test Hardness Test
100% Hydrostatic test Refer to ASTM A-450

ASTM-A213

Under 25.4

.1016

.1016

+20

-0

3.175

0

Seamless Boiler

25.4-38.1 incl

.1524

.1524

+22

-0

3.175

0

Superheater and

38.1-50.8 excl

.2032

.2032

+22

-0

3.176

0

Heat Exchanger

50.8-63.5 excl

.254

.254

+22

-0

4.46

0

Tubes

63.5-76.2 excl

.3048

.3048

+22

-0

4.76

0

76.2-101.6 incl

.381

.381

+22

-0

4.76

0

Under 25.4

.1016

.1016

+10 -10

3.175

0

ASTM-A249

25.4-38.1 incl

.1524

.1524

+10 -10

3.175

0

Tension Test

Welded Boiler

38.1-50.8 Excl

.2032

.2032

+10 -10

3.175

0

Flattening Test

Superheater, Heat

50.0-63.5 excl

.254

.254

+10 -10

4.762

0

Flange Test

Exchanger And

63.5-76.2 excl

.3848

.3048

+10 -10

4.762

0

Reverse Bend Test

Condenser Tubes

76.2-101.6 incl

.381

.381

+10 -10
Minimum Wall tubes
+ 18% 0 available On request

4.762

0

Hardness Test
100% Hydrostastic Test Refer to ASTM A-450

Untp 12.7

.13

.13

+15

-15

3.2

0

Flare Test (Seamless Only)

ASTM-A269

12.7-38.1 excl

.13

.13

+10

-10

3.2

0

Flange Test (Welded Only)

Seamless & Welded

38.1-88.9 excl

.25

.25

+10

-10

4.8

0

Hardness Test

Tubing for General

88.9-139.7 excl

.38

.38

+10

-10

4.8

0

Reverse Flattening Test

Service

139.7-203.2 excl

.76

.76

+10

-10

4.8

0

(Welded only)

100% Hydrostatic Test

Refer to ASTM-A269

25.4
38.1

.05
.05

.20
.20

+10.0
+10.0

-10.0
-10.0

3.2
3.2
0
0

Reverse flattening Test

ASTM-A270

50.8

.05

.28

+10.0

-10.0

3.2

0

100% Hydrostastic Test

Seamless & Welded

60.5

.05

.28

+10.0

-10.0

3.2

0

External’ polish on all tubes

Sanitary Tubing

76.2
101.6

.08
.08

.30
.38

+10.0
+10.0

-10.0
-10.0

3.2
4.8
0
0

Refer to ASTM A-270

3.175-38.1 incl
38.1-1016 incl

.4
.79

.79
.79

Minimum Wall 12.5% under

6.4 0
6.4 0

Tension Test

ASTM-A312

101.6-203.2 incl

1.59

.79

nominal wall

6.4 0

Flattening Test

Seemless & Welded pipe

Specified

(Normally Random Lengths ordered)

100% Hydrostatic Test Refer to ASTM A-530

ASTM A-358
Welded pipe

219.08-750mm

+0.5%

-0.3

6.0

Refer to ASTM A-530


ASTM A790 Pipe Mechanical Properties

S31803 / S32205 Density Melting Point Yield Strength (0.2%Offset) Tensile Strength Elongation
7.8 g/cm3 1350 °C (2460 °F) Psi – 80000 , MPa – 550 Psi – 116000 , MPa – 800 15 %

Chemical Composition of Duplex Stainless Steel Seamless Pipe

S31803 / S32205 C N P Si Mn Mo Fe Cr S Ni
1.0 0.03 0.02 2.0 3.0 – 3.5 22.0 – 23.0 0.03 4.5 – 6.5 0.14 – 0.2 Bal

Duplex Steel Boiler Tube Equivalent

STANDARD UNS WERKSTOFF NR.
S31803 S31803 1.4462
S32205 S32205 1.4462

Duplex Steel Heat Exchanger Tube Dimensions

Best Deal Guaranteed on Schedule 40 Duplex Steel ERW Pipe and ASTM A790 Pipe for Oil and Gas Industry
 

NPS

OD
Inches

 

Designations

Wall Thickness (Inches) Inside Diam (Inches) Weight (lbs./ft.)
 

1/8

 

0.405

10/10S
Std./40/40S XS/80/80S

0.049
0.068
0.095

0.307
0.269
0.215
0.1863
0.2447
0.3145
 

1/4

 

0.540

10/10S
Std./40/40S XS/80/80S

0.065
0.088
0.119

0.410
0.364
0.302
0.3297
0.4248
0.5351
 

3/8

 

0.675

10/10S
Std./40/40S XS/80/80S

0.065
0.091
0.126

0.545
0.493
0.423
0.4235
0.5676
0.7388
 

1/2

 

0.840

5/5S
10/10S
Std./40/40S XS/80/80S 160
XX

0.065
0.083
0.119
0.147
0.188
0.294

0.710
0.674
0.622
0.546
0.466
0.252
0.5383
0.6710
0.8510
1.0880
1.3090
1.7140
 

3/4

 

1.050

5/5S
10/10S
Std./40/40S XS/80/80S 160
XX

0.065
0.083
0.113
0.154
0.219
0.308

0.920
0.884
0.824
0.742
0.618
0.434
0.6838
0.8572
1.1310
1.4740
1.9440
2.4410
 

1

 

1.315

5/5S
10/10S
Std./40/40S XS/80/80S 160
XX

0.065
0.109
0.133
0.179
0.250
0.358

1.185
1.097
1.049
0.957
0.815
0.599
0.8678
1.4040
1.6790
2.1720
2.8440
3.6590
 

1 1/4

 

1.660

5/5S
10/10S
Std./40/40S XS/80/80S 160
XX

0.065
0.109
0.140
0.191
0.250
0.382

1.530
1.442
1.380
1.278
1.160
0.896
1.1070
1.8060
2.2730
2.9970
3.7650
5.2140
 

1 1/2

 

1.900

5/5S
10/10S
Std./40/40S XS/80/80S 160
XX

0.065
0.109
0.145
0.200
0.281
0.400

1.770
1.682
1.610
1.500
1.338
1.100
1.2740
2.0850
2.7180
3.6310
4.8590
6.4080
 

2

 

2.375

5/5S
10/10S
Std./40/40S XS/80/80S 160
XX

0.065
0.109
0.154
0.218
0.344
0.436

2.245
2.157
2.067
1.939
1.689
1.503
1.6040
2.6380
3.6530
5.0220
7.4620
9.0290
 

2 1/2

 

2.875

5/5S
10/10S
Std./40/40S XS/80/80S 160
XX

0.083
0.120
0.203
0.276
0.375
0.552

2.709
2.635
2.469
2.323
2.125
1.771
2.4750
3.5310
5.7930
7.6610
10.0100
13.6900
 

3

 

3.500

5/5S
10/10S
Std./40/40S XS/80/80S 160
XX

0.083
0.120
0.216
0.300
0.438
0.600

3.334
3.260
3.068
2.900
2.624
2.300
3.0290
4.3320
7.5760
10.2500
14.3200
18.5800
 

3 1/2

 

4.000

5/5S
10/10S
Std./40/40S XS/80/80S XX

0.083
0.120
0.226
0.318
0.636

3.834
3.760
3.548
3.364
2.728
3.4720
4.9730
9.1090
12.5000
22.8500
 

 

4

 

 

4.500

5/5S
10/10S
Std./40/40S XS/80/80S 120
160
XX

0.083
0.120
0.237
0.337
0.438
0.531
0.674

4.334
4.260
4.026
3.826
3.624
3.438
3.152
3.9150
5.6130
10.7900
14.9800
19.0000
22.5100
27.5400
 

4 1/2

 

5.000

Std./40/40S XS/80/80S
XX

0.247
0.355
0.710

4.506
4.290
3.580
12.5300
17.6100
32.4300
 

 

5

 

 

5.563

5/5S
10/10S
Std./40/40S XS/80/80S 120
160
XX

0.109
0.134
0.258
0.375
0.500
0.625
0.750

5.345
5.295
5.047
4.813
4.563
4.313
4.063
6.3490
7.7700
14.6200
20.7800
27.0400
32.9600
38.5500
 

 

6

 

 

6.625

5/5S
10/10S
Std./40/40S XS/80/80S 120
160
XX

0.109
0.134
0.280
0.432
0.562
0.719
0.864

6.407
6.357
6.065
5.761
5.491
5.189
4.897
7.585
9.289
18.970
28.570
36.390
45.350
53.160
 

7

 

7.625

Std./40/40S XS/80/80S XX

0.301
0.500
0.875

7.023
6.625
5.875
23.570
38.050
63.080
 

 

 

8

 

 

 

8.625

5S
10/10S
20
30
Std./40/40S 60 XS/80/80S 100
120
140
XX 160

0.109
0.148
0.250
0.277
0.322
0.406
0.500
0.594
0.719
0.812
0.875
0.906

8.407
8.329
8.125
8.071
7.981
7.813
7.625
7.439
7.189
7.001
6.875
6.813
9.914
13.400
22.360
24.700
28.550
35.640
43.390
50.950
60.710
67.760
72.420
74.690
 

9

 

9.625

Std./40/40S XS/80/80S XX

0.342
0.500
0.875

8.941
8.625
7.875
33.900
48.720
81.770
 

 

 

10

 

 

 

10.750

5S
10S
20
30
Std./40/40S XS/60/80S 80
100
120
140
160

0.134
0.165
0.250
0.307
0.365
0.500
0.594
0.719
0.844
1.000
1.125

10.482
10.420
10.250
10.136
10.020
9.750
9.564
9.314
9.064
8.750
8.500
15.190
18.700
28.040
34.240
40.480
54.740
64.430
77.030
89.290
104.130
115.640
 

11

 

11.750

Std./40/40S XS/80/80S XX

0.375
0.500
0.875

11.000
10.750
10.000
45.550
60.070
101.630
 

 

12

 

 

12.750

5S
10S
20
30
Std./40S 40 XS/80S

0.165
0.180
0.250
0.330
0.375
0.406
0.500

12.420
12.390
12.250
12.090
12.000
11.938
11.750
22.180
24.200
33.380
43.770
49.560
53.530
65.420
 

 

14

 

 

14.000

10S
10
20
Std./30/40S 40
XS/80S 60
80
100
120
140
160

0.188
0.250
0.312
0.375
0.438
0.500
0.594
0.750
0.938
1.094
1.250
1.406

13.624
13.500
13.376
13.250
13.124
13.000
12.814
12.150
12.126
11.814
11.500
11.188
27.730
36.710
45.610
54.570
63.440
72.090
85.050
106.130
130.850
150.900
170.210
189.100
 

 

 

16

 

 

 

16.000

10S
10
20
Std./30/40S XS/40/80S 60
80
100
120
140
160

0.188
0.250
0.312
0.375
0.500
0.656
0.844
1.031
1.219
1.438
1.594

15.624
15.500
15.376
15.250
15.000
14.688
14.314
13.938
13.564
13.124
12.814
31.750
42.050
52.270
62.580
82.770
107.500
136.610
164.820
192.430
223.640
245.250

Weight Chart of ASTM a789 tubing

DIMENSION

10 SWG
(3.2 MM)

12 SWG
(2.6 MM)

14 SWG
(2.1 MM)

16 SWG
(1.65 MM)

18 SWG
(1.2 MM)

19 SWG
(1.0 MM)

Size

OD Weight/MTR Weight/MTR Weight/MTR Weight/MTR Weight/MTR Weight/MTR
1/2″

12.7

0.754 0.651 0.552 0.452 0.342 0.290
5/8″

15.875

1.006 0.856 0.718 0.582 0.437 0.369
3/4″

19.05

1.258 1.061 0.883 0.712 0.531 0.448
1″

25.4

1.762 1.470 1.214 0.972 0.720 0.605

1 1/4″

31.75

2.266 1.880 1.544 1.232 0.909 0.763

1 1/2″

38.1

2.770 2.289 1.875 1.492 1.098 0.920
2″

50.8

3.778 3.108 2.537 2.012 1.476 1.235

2 1/2″

63.5

4.786 3.928 3.198 2.531 1.854 1.550
3″

76.2

5.794 4.747 3.860 3.051 2.232 1.865

3 1/2″

88.9

6.802 5.566 4.521 3.571 2.610 2.180
4″

101.6

7.810 6.385 5.183 4.091 2.988 2.495

ASME SA790M Pipe Pressure Rating

Tube O.D.
(in.)
Wall Thickness of Tube (inches)
.028 .035 .049 .065 .083 .095 .109 .120
Working Pressure (psig)
1/8 7900 10100
1/4 3700 4800 7000 9500
5/16 3700 5400 7300
3/8 3100 4400 6100
1/2 2300 3200 4400
3/4 2200 3000 4000 4600
1 2200 2900 3400 3900 4300