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Duplex Pipe

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Duplex Stainless Steel Seamless Pipe and Duplex Welded Pipe supplier in India

Duplex Pipe

More than 10 years of experience as a Duplex Pipe manufacturer in India, Exporter of Seamless/ Welded/ ERW Duplex Stainless Steel Pipe in round, square or custom shapes accordance to ASTM A790/ A789 American standards and specifications

What is a duplex pipe?

Duplex pipes are stainless steel pipes with a high chromium content and a low nickel content. DSS pipes are robust and resistant to corrosive conditions. Desalination plants, heat exchangers, and marine operations all use duplex pipes.

The Duplex Steel Pipe derives its name from the dual character of the alloy's microstructure. Duplex Stainless Steel Seamless Pipe has high mechanical properties and may be used as welded. The Seamless Duplex Pipe is thought to be superior in corrosion resistance.

What is duplex steel pipe used for?

Duplex Steel Pipes are always employed in the offshore oil and gas industry. The metal is less expensive because of the decreased nickel concentration used to alloy Duplex Pipe. The enhanced molybdenum and chromium content of the Duplex EFW Pipes offers the material stronger corrosion resistance than regular DSS grade.

Due to its unique properties, duplex stainless steel pipe is widely utilised in petrochemical equipment, saltwater and wastewater treatment equipment, oil and gas pipelines, paper-making machinery, and other industrial industries. It has also been applied in bridge-bearing structures, with a promising future.

Duplex seamless vs. welded pipe.

The high molybdenum, chromium, and nitrogen composition of Duplex Seamless Pipe result in solid resistance to chloride pitting and crevice corrosion attack. The addition of yttrium to DSS Seamless Pipes enhances chromium and aluminium oxide scale adhesion and spalling resistance. It is advised to use gas from Air for heavier joints in Duplex Stainless Steel Pipes to lessen the risk of weld solidification fractures.

On the other hand, DSS Welded Pipe offers much more excellent tensile strength qualities. They have good weldability and may be welded using any standard welding method, though they are not easily welded. It is neither like the welding heat-affected zone of ferritic stainless steel, where the plastic toughness is considerably reduced due to grain coarsening, nor is it like austenitic stainless steel, which is more vulnerable to welding hot fractures.

We are one of the leading Duplex Pipe manufacturers who provide excellent corrosion resistance and high strength. Our company's Duplex ERW Pipe is machined using the most recent machining technology, resulting in a better finish.

Duplex Pipe

 

Table of Content

Duplex Pipe Specification

Size

Out Diameter:10.29mm-812.80mm

Thickness:1.00mm-60.00mm

Length:6m or as customer demands
Tolerance a) OD:+/-0.2mm b) Thickness:+/-10% c) Length:+/-5mm
Processing Service Cutting, Welding, Punching, Bending, Decoiling, Moulding
Manufacturing Shapes Box Section, Round, Square, Rectangle
Manufacturing types ERW, Welded, Seamless, EFW
Surface 180G, 240G, 320G Satin / Hairline 400G, 600G Mirror finish
Pipes Schedules SCH20, SCH40, STD, SCH80, SCH30, SCH120
Inspection Test Reports By Duplex Pipe suppliers PMI Test Reports, NABL Approved Lab Reports, Certificates, Mechanical Reports, Chemical Reports, EN 10204 3.1, Mill Test, Third Party Inspection, Visual Inspection Reports, Destructive and Non Destructive Test Reports
Length Single Random Length(SRL), Double Random Length (DRL),Fix Length, Range 1, 2 and 3, Maximum upto 14Mtr
Processing Turning, Drilling, Milling, Stamping, Swaging, Enlargment, Bending, Punching, Reduction
Test Certificate
  • Third Party Inspection (TPI)
  • Moisture testing
  • Surface roughness measurement
  • 100% Radiography Test Report
  • Manufacturer Test Certificate
  • DFARS compliant
  • Raw Materials Certificate
  • Fumigation Certificates
  • Heat Treatment Charts
  • Form A for Generalized System of Preferences (GSP)
  • HS Code Commercial Invoice
Value Added Services Honing, Mirror Polish, Crome Plating, Washing, De Rusting, Swaging, Bulging

Why choose Naman Pipe & Tubes?

  • Established in 2006
  • NACE MR0175/ISO 15156 tested material
  • Reduced cost compared to other Duplex Pipe suppliers
  • Extensive stock
  • Tested Duplex Pipe material
NACE Tested

Duplex Pipe Price List

US $
803.83

Per Piece

DSS PIPES SA790 DN 125 SCH. 160 ASME B36.10

US $
12.50

Per Kg

SMLS PIPES DSS SIZE:OD:114.30MM X 3.05

US $
2.06

Per Kg

Seamless Duplex Stainless Steel Pipe (A-790)

US $
2.28

Per Kg

SCH. 160 Duplex Seamless Pipe (ASME B36.10)

US $
2.07

Per Kg

STAINLESS STEEL SEAMLESS DSS PIPE (NPS5)

US $
2.33

Per Kg

SEAMLESS PIPES GRADE DSS 2 Inch Dia

US $
41.26

Per Kg

SCH.80S Duplex Welded Pipe, PREN MIN 40

US $
10.87

Per Kg

SCH 40S Duplex Welded Pipe, PREN MIN 40

US $
12.15

Per Kg

Seamless Duplex Pipe, 114.30MM OD, PE

Different Types of Duplex Steel Pipes

Duplex Pipe

Duplex Pipe

Duplex Welded Pipe

Duplex Welded Pipe

Duplex Steel Pipes

Duplex Steel Pipes

Duplex Stainless Steel Pipe

Duplex Stainless Steel Pipe

Duplex Steel Pipe

Duplex Steel Pipe

Duplex Seamless Pipe

Duplex Seamless Pipe

Duplex SS Pipe

Duplex SS Pipe

DSS Pipe

DSS Pipe

DSS ERW Pipe

DSS ERW Pipe

Seamless Duplex Pipe

Seamless Duplex Pipe

SS Duplex Pipe

SS Duplex Pipe

DSS Stainless Steel Seamless Pipe

DSS Stainless Steel Seamless Pipe

Duplex Steel Welded Pipes

Duplex Steel Welded Pipes

DSS Welded Pipe

DSS Welded Pipe

DSS EFW Pipe

DSS EFW Pipe

Schedule 60/ 80/ STD and SCH 40 Duplex Pipe supplier in India, Stockist of Duplex Steel Pipes in a wide range of sizes and wall thicknesses, call us for a free quote!

DSS Pipe Chemical Composition

C 0-0.03
Si 1.0
Ni 4.5-6.5
P 0-0.03
Mn 2.0
S 0-0.02
Cr 21-23
N 0.08-0.2
Mo 2.5-3.5
Cu -

Duplex Welded Pipe Mechanical Properties

Grade 2205
Tensile Strength (MPa) 620
Elongation A5 (%) 25
Proof Stress 0.2% (MPa) 450

Duplex Seamless Pipe Equivalent Grade

STANDARD UNS WERKSTOFF NR.
DSS 2205 S31803 1.4462

DSS ERW Pipe Dimensions

Nominal O.D. Inches 10s 80 40 80s & E.H. 40s & Std 10 160
1/8 .405 .049 .095 .068 .095 .068 .049
1/4 .540 .065 .119 .088 .119 .088 .065
3/8 .675 .065 .126 .091 .126 .091 .065
1/2 .840 .083 .147 .109 .147 .109 .083 .187
3/4 1.050 .083 .154 .113 .154 .113 .083 .218
1 1.315 .109 .179 .133 .179 .133 .109 .250
1 1/4 1.660 .109 .191 .140 .191 .140 .109 .250
1 1/2 1.900 .109 .200 .145 .200 .145 .109 .281
2 2.375 .109 .218 .154 .218 .154 .109 .343
2 1/2 2.875 .120 .276 .203 .276 .203 .120 .375
3 3.500 .120 .300 .216 .300 .216 .120 .437
3 1/2 4.000 .120 .318 .226 .318 .226 .120
4 4.500 .120 .337 .237 .337 .237 .120 .531
4 1/2 5.000 .355 .247
5 5.563 .134 .375 .258 .375 .258 .134 .625
6 6.625 .134 .432 .280 .432 .280 .134 .718
7 7.625 .500 .301
8 8.625 .148 .500 .322 .500 .322 .148 .906
9 9.625 .500 .342
10 10.750 .165 .593 .365 .500 .365 .165 1.125
11 11.750 .500 .375
12 12.750 .180 .687 .406 .500 .375 .180 1.312
14 14.000 .188 .750 .437 .500 .375 .250 1.406
16 16.000 .188 .843 .500 .500 .375 .250 1.593
18 18.000 .188 .937 .562 .500 .375 .250 1.781

Duplex Stainless Steel Pipe Thickness

OD
mm		 Sch WT
mm		 in. Kg/m
13.72 10S 1.65 1/4 0.50
13.72 40S 2.24 1/4 0.64
13.72 80S 3.02 1/4 0.81
17.15 10S 1.65 3/8 0.64
17.15 40S 2.31 3/8 0.86
17.15 80S 3.20 3/8 1.12
21.34 10S 2.11 1/2 1.02
21.34 40S 2.77 1/2 1.29
21.34 80S 3.73 1/2 1.65
26.67 10S 2.11 3/4 1.30
26.67 40S 2.87 3/4 1.71
26.67 80S 3.91 3/4 2.23
33.40 10S 2.77 1 2.13
33.40 40S 3.38 1 2.54
33.40 80S 4.55 1 3.29
33.40 160 6.352) 1 4.30
42.16 10S 2.77 1¼ 2.73
42.16 40S 3.56 1¼ 3.44
42.16 80S 4.85 1¼ 4.53
42.16 160 6.352) 1¼ 5.69
48.26 10S 2.77 1½ 3.16
48.26 40S 3.68 1½ 4.11
48.26 80S 5.08 1½ 5.49
60.33 10S 2.77 2 3.99
60.33 40S 3.91 2 5.52
60.33 80S 5.54 2 7.60
60.33 160 8.742) 2 11.29
73.03 10S 3.05 2½ 5.35
73.03 40S 5.16 2½ 8.77
73.03 80S 7.01 2½ 11.59
88.90 10S 3.05 3 6.56
88.90 40S 5.49 3 11.47
88.90 80S 7.62 3 15.51
88.90 160 11.132) 3 21.67
101.60 10S 3.05 3½ 7.53
101.60 40S 5.74 3½ 13.78
101.60 80S 8.08 3½ 18.92
114.30 10S 3.05 4 8.50
114.30 40S 6.02 4 16.32
114.30 80S 8.56 4 22.67
114.30 160 13.492) 4 34.05
141.30 40S 6.55 5 22.10
141.30 80S 9.53 5 31.44
141.30 160 15.882) 5 49.87
168.28 10S 3.4 6 14.04
168.28 40S 7.11 6 28.69
168.28 80S 10.97 6 43.21
168.28 120 14.27 6 54.75
168.28 160 18.262) 6 68.59
219.08 40S 8.18 8 43.20
219.08 80S 12.7 8 65.63
219.08 120 18.23 8 91.30
219.08 160 23.012) 8 112.97

DSS Seamless Pipe Sizes

NOMINAL PIPE SIZE OUTSIDE DIAMETER (INCHES)
1/2" 0.84
1-1/2" 1.9
1" 1.315
1-1/4" 1.66
3/4" 1.05
2" 2.375
3" 3.5
2-1/2" 2.875
3-1/2" 4

Duplex Stainless Steel Pipe Schedule Chart

1/8" IPS(.405" O.D.) 3 1/2" IPS( 4.000" O.D.)
SCH 40, 80 SCH 10, 40, 80, 160, XXH
3/8" IPS(.675" O.D.) 5" IPS( 5.563" O.D.)
SCH 10, 40, 80 SCH 10, 40, 80, 160, XXH
1/2" IPS(.840" O.D.) 6" IPS(6.625" O.D.)
SCH 5, 10, 40, 80, 160, XXH SCH 5, 10, 40, 80, 120, 160, XXH
1/4" IPS(.540" O.D.) 4" IPS(4.500" O.D.)
ASME SA790 SCH 10, 40, 80 SCH 10, 40, 80, 160, XXH
3/4" IPS(1.050" O.D.) 8 ” IPS(8.625" O.D.)
SCH 10, 40, 80, 160, XXH SCH 5, 10, 40, 80, 120, 160, XXH
1-1/2" IPS(1.900" O.D.) 14" IPS(14.000" O.D.)
SCH 5, 10, 40, 80, 160, XXH SCH 10, 20, 40, 80 (.500), TRUE 80(.500)
1-1/4" IPS(1.660" O.D.) 12" IPS(12.750" O.D.)
SCH 10, 40, 80, 160, XXH SCH10 (.188), SCH40 (.375)
2" IPS(2.375" O.D.) 16" IPS(16.000" O.D.)
SCH 10, 40, 80, 160, XXH SCH10(.188), SCH40(.375)
1" IPS:(1.315′ O.D.) 10" IPS(10.750" O.D.)
SCH 10, 40, 80, 160, XXH SCH 10, 20, 40(.375), TRUE40(.406), SCH80(.500)
2 1/2" IPS(2.875" O.D.) 18" IPS (18.000" O.D.)
SCH 10, 40, 80, 160, XXH SCH-40 (.375)
Stockholder & distributor of DSS Pipe in Mumbai, exporter of Duplex Stainless Steel Pipe in all standard length and sizes, check our latest price in India

DSS Pipe Weight Chart

NPS Outside Diameter Wall Thickness Weight Weight
Sched in mm in mm kg/Mtr Lb/ft
1/2″ 40 STD 0.840 21 0.109 2.769 1.268 0.851
80 STD 0.147 3.734 1.621 1.088
3/4″ 40 STD 1.050 27 0.113 2.870 1.684 1.131
80 STD 0.154 3.912 2.195 1.474
1″ 40 STD 1.315 33 0.133 3.378 2.501 1.679
80 STD 0.179 4.547 3.325 2.172
1 1/4″ 40 STD 1.660 42 0.140 3.556 3.385 2.273
80 STD 0.191 4.851 4.464 2.997
1 1/2″ 40 STD 1.900 48 0.145 3.683 4.048 2.718
80 STD 0.200 5.080 5.409 3.361
2″ 40 STD 2.375 60 0.154 3.912 5.441 3.653
80 STD 0.218 5.537 7.480 5.022
2 1/2″ 40 STD 2.875 73 0.203 5.516 8.629 5.793
80 STD 0.276 7.010 11.411 7.661
3″ 40 STD 3.500 89 0.216 5.486 11.284 7.576
80 STD 0.300 7.620 15.272 10.253
4″ 4.500 114 0.237 6.020 16.073 10.790
0.337 8.560 22.318 14.983
6″ 6.625 168 0.188 4.775 19.252 12.924
0.203 5.516 20.739 13.923
0.219 5.563 22.318 14.983
0.250 6.350 25.354 17.021
40 STD 0.280 7.112 58.263 18.974
0.312 7.925 31.334 21.036
0.375 9.525 37.285 25.031
80 XHY 0.432 10.973 42.561 28.573
0.500 12.700 48.719 32.708
8″ 8.625 219 0.188 4.775 25.233 16.940
0.203 5.156 27.198 18.259
0.219 5.563 29.286 19.661
SCH 20 0.250 6.350 33.308 22.361
SCH 30 0.277 7.036 36.786 24.696
SCH 40 0.322 8.179 42.352 28.554
0.375 9.525 49.216 33.041
SCH 60 0.406 10.312 53.085 35.638
80 XHY 0.500 12.700 64.627 43.388
10″ 10.750 273 0.188 4.775 31.588 21.207
0.219 5.563 36.689 24.631
20 0.250 6.350 41.759 28.035
30 0.307 7.798 51.002 34.240
0.344 8.738 56.946 38.231
40 STD 0.365 9.271 63.301 40.483
0.438 11.125 71.852 48.238
60 XHY 0.500 12.700 81.530 54.735
80 0.594 15.088 95.969 64.429
12″ 12.750 324 0.188 4.775 37.570 25.222
0.219 5.563 43.657 29.309
0.250 6.350 49.713 33.375
0.281 7.137 55.739 37.420
0.312 7.925 61.735 41.445
0.375 9.525 73.824 49.562
0.406 10.312 79.727 53.525
0.500 12.700 97.438 65.415
0.562 14.275 108.966 73.154
14″ 14.000 356 0.188 4.775 41.308 27.732
0.219 5.563 48.012 32.233
20 0.250 6.350 54.685 36.713
0.281 7.137 61.327 41.172
0.312 7.925 67.939 45.611
STD 0.375 9.525 81.281 54.568
40 0.438 11.125 94.498 63.441
XHY 0.500 12.700 107.381 72.090
0.625 15.875 132.983 89.278
16” 16.000 406 0.188 4.775 47.290 21.748
0.219 5.563 54.980 36.910
10 0.250 6.350 62.639 42.053
0.281 7.137 70.268 47.174
20 0.312 7.925 77.866 52.275
0.344 8.738 85.677 57.519
30 STD 0.375 9.525 93.213 62.578
0.438 11.125 108.433 72.797
40 XHY 0.500 12.700 123.289 82.770
18″ 18.000 457 0.219 5.563 61.948 41.588
0.250 6.350 70.593 47.393
0.281 7.137 79.208 53.176
20 0.312 7.925 87.792 58.939
STD 0.375 9.525 105.144 70.588
30 0.438 11.125 122.369 82.152
XHY 0.500 12.700 139.198 93.450
40 0.562 14.275 155.904 104.666
0.625 15.875 172.754 115.978
20″ 20.000 508 0.250 6.350 78.547 52.733
0.282 7.163 88.458 59.386
0.312 7.925 97.719 65.604
20 STD 0.375 9.525 117.075 78.598
0.438 11.125 136.305 91.508
30 XHY 0.500 12.700 155.106 104.130
40 0.594 15.088 183.378 123.110
0.625 15.875 192.640 129.328
0.688 17.475 211.368 141.901
24″ 24.000 610 0.250 6.350 94.456 63.413
0.281 7.137 106.029 71.183
0.312 7.925 117.573 18.932
20 STD 0.375 9.525 140.938 64.618
0.438 11.125 164.176 110.219
XHY 0.500 12.700 186.923 125.490
0.625 15.875 232.410 156.028
40 0.688 17.475 255.148 171.293
0.750 19.050 277.401 186.233
30″ 30.000 762 0.250 6.350 118.318 79.433
0.281 7.137 132.851 89.189
10 0.312 7.925 147.353 98.925
STD 0.375 9.525 176.731 118.648
0.438 11.125 205.983 138.286
20 XHY 0.500 12.700 234.647 157.530
30 0.625 15.875 292.066 196.078
0.688 17.475 320.817 215.380
0.750 19.050 348.988 234.293
36″ 36.000 914 0.250 6.350 142.180 95.453
0.281 7.137 159.672 107.196
10 0.312 7.925 177.133 118.918
STD 0.375 9.525 215.525 142.678
0.438 11.125 247.790 166.353
20 XHY 0.500 12.700 282.372 198.570
0.625 15.875 351.723 236.128
0.688 17.475 386.487 259.467
0.750 19.050 420.576 282.353
42″ 42.000 1067 0.312 7.925 206.914 138.911
STD 0.375 9.525 248.319 166.708
XHY 0.500 12.700 33.097 221.610
0.750 19.050 492.163 330.413
48″ STD 48.000 1219 0.375 9.525 284.112 190.738
0.438 11.125 331.404 222.487
XHY 0.500 12.700 377.822 253.650
0.750 19.050 563.750 378.473
0.875 22.225 655.969 440.383

Manufacturers' Marking on Duplex Pipe

Marking on Duplex Pipe

Marking on Duplex Pipe

Marking on Duplex Seamless Pipe

Marking on Duplex Seamless Pipe

Marking on Duplex Welded Pipe

Marking on Duplex Welded Pipe

Advantages of Duplex Pipe

  • Resistance to corrosion
    One of the main advantages of duplex steel is the fact that it does not readily succumb to corrosion. It can withstand normal temperatures up to 150 degrees celsius and not suffer cracking due to stress. Therefore, they are utilized in corrosive environments, where they are exposed to chloride and extreme temperatures. They are also a vital part of the construction of ships.
  • Cost
    In comparison to super austenitic stainless steel, duplex stainless steels tend to be a significantly lower cost.
  • Welding and fabrication
    The ease of welding and machining implies it is duplex steel that can be less expensive than other alloys and is more efficient to weld than high nickel alloys.

Seamless Duplex Pipe Surface Roughness Chart

China's old standard (finish) China New standard (roughness) Ra AmericanStandard(microns), Ra American Standard (Micro-inch), Ra
▽ 4 6.3 8.00 320
6.30 250
▽ 5 3.2 5.00 200
4.00 160
3.20 125
▽ 6 1.6 2.50 100
2.00 80
1.60 63
▽ 7 0.8 1.25 50
1.00 40
0.80 32
▽ 8 0.4 0.63 25
0.50 20
0.40 16

DSS Pipe Pressure Rating

SIZES
(INCHES)		 WALL
THICK.
(IN)
SCHEDULE (SCH) OUTSIDE
DIA.
(IN)
TEMPERATURE(OF)
100 200 300 400 500 600 650 700 750
ALLOWABLE STRESS(PSI)
16700 16700 16700 15500 14400 13500 13200 12900 12600
1" 0.133 40 1.315 2205 2205 2205 2047 1902 1783 1743 1703 1664
0.179 80 1.315 3061 3061 3061 2841 2640 2475 2420 2365 2310
0.250 160 1.315 4493 4493 4493 4170 3874 3632 3552 3471 3390
1 1/2" 0.145 40 1.900 1629 1629 1629 1512 1404 1317 1287 1258 1229
0.200 80 1.900 2303 2303 2303 2138 1986 1862 1821 1779 1738
0.281 160 1.900 3362 3362 3362 3120 2899 2717 2657 2597 2536
2" 0.154 40 2.375 1371 1371 1371 1272 1182 1108 1083 1059 1034
0.218 80 2.375 1985 1985 1985 1843 1712 1605 1569 1534 1498
0.344 160 2.375 3283 3283 3283 3047 2831 2654 2595 2536 2477
3" 0.216 40 3.500 1301 1301 1301 1208 1122 1052 1028 1005 982
0.300 80 3.500 1844 1844 1844 1712 1590 1491 1458 1425 1391
0.438 160 3.500 2787 2787 2787 2587 2403 2253 2203 2153 2103
4" 0.237 40 4.500 1102 1102 1102 1023 950 891 871 851 831
0.337 80 4.500 1596 1596 1596 1482 1377 1291 1262 1233 1204
0.531 160 4.500 2611 2611 2611 2424 2552 2111 2064 2017 1970
5" 0.258 40 5.563 965 965 965 896 832 780 763 746 728
0.375 80 5.563 1428 1428 1428 1325 1231 1154 1129 1103 1077
0.625 160 5.563 2474 2474 2474 2296 2133 2000 1955 1911 1866
6" 0.280 40 6.625 877 877 877 814 756 709 693 677 661
0.432 80 6.625 1379 1379 1379 1280 1189 1115 1090 1065 1040
0.719 160 6.625 2382 2382 2382 2211 2054 1925 1883 1840 1797
8" 0.322 40 8.625 771 771 771 716 665 623 610 596 582
0.500 80 8.625 1218 1218 1218 1131 1050 985 963 941 919
0.906 160 8.625 2298 2298 2298 2133 1982 1858 1817 1775 1734
10" 0.365 40 10.750 699 699 699 649 603 565 553 540 528
0.594 80 10.750 1159 1159 1159 1075 999 937 916 895 874
1.125 160 10.750 2289 2289 2289 2124 1974 1850 1809 1768 1727
Check Duplex Pipe Price List, we offer MTC reports & genuine rates compared to other Duplex Pipe suppliers

DSS Welded Pipes Tolerances

Size, mm Tolerance OD, mm
13.72-48.3 +0.4/-0.8
>114.3-219.1 +1.6/-0.8
>48.3-114.3 +/- 0.8

Tolerances on wall thickness of Seamless Duplex Pipe

Size, mm Wall thickness, % WT/OD ratio
13.72-73.03 +20/-12.5 All
88.90-219.10 +22.5/-12.5 Less or equal to 0.05
88.90-219.10 +15/-12.5 Above 0.05

Specific heat capacity of DSS Pipe

Temperature, °C J/(kg °C) Temperature, °F Btu/(lb °F)
20 480 68 0.11
400 590 800 0.14
200 530 400 0.13
100 500 200 0.12
300 550 600 0.13

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

DSS Pipe HS Code

HS Code 73049000 DSS Pipe

DSS Pipe Applications

  • Chemical
  • Automotive
  • Pulp and paper
  • Power Generation
  • Marine
  • Oil and gas production
  • Petrochemical
  • Water desalinization

Duplex Pipe Welding Procedure

DSS Pipe has a good weldability. Welding must be done without preheating, and heat treatment is usually not required thereafter. Manual metal-arc welding (MMA/SMAW) and gas-shielded arc welding are both acceptable fusion welding processes, with TIG/GTAW being the preferred approach.

Duplex Steel Pipes Stock List

DSS Steel Welded Pipes DSS Seamless Pipes
6 Inch Welded DSS Steel Pipes Welded polished annealed DSS Pipes
DSS Stainless Steel perforated Pipes Large diameter DSS Pipes
Beveled End Pipes Plain End Pipes

Various Manufacturing Process Of DSS Pipe

  • Seamless
  • Welded
  • Electric Resistance Welded (ERW)
  • Horizontal Submerged Arc Welded (HSAW)
  • Longitudinally Submerged Arc Welded (LSAW)
  • Submerged Arc Welded (SAW)
  • Hot Finesh Seamless (HFS)
  • Electro Fusion Seam Welded (EFSW)
  • Cold Drawn Seamless (CDS)

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