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Duplex pipe supplier in India

Duplex pipe

What is a duplex pipe?

These pipes use a special alloy comprising iron, chromium, and nickel. a duplex pipe has two grades – ferritic and austenitic – for a unique microstructure.The most common composition is 22% chromium, 5% nickel, and 5% molybdenum. A duplex stainless steel pipe shows high strength, good welding performance, and superior corrosion resistance when exposed to chlorides and sulphides. It also exhibits excellent heat conductivity.

Duplex stainless steel seamless pipes manufacturer in Mumbai

How is duplex seamless pipes manufactured?

The manufacturing process involves multiple steps, starting with melting steel in an electric arc furnace. This molten steel gets shifted to a converter (aod, or argon oxygen decarburization). The composition gets settled during this step by adding the alloying elements and eliminating the gases. The last step is casting into the desired shape, like a duplex seamless pipes. Manufacturers may perform further steps to meet client requirements, for instance, solution annealing, peeling, and pickling.


Specification of duplex pipe

Duplex seamless pipe sizes
Duplex SS pipe international specification DSS welded pipe sizes
  • 4mm to 219mm
  • ASME SA790
  • ASTM A790
  • 1/2"NB to 16"NB
Duplex alloy annealed pipe density Duplex alloy exhaust pipe temperature range DSS clad pipe melting point
  • 7.8g/cm3
  • 950°C – 1150°C
  • 1350°C
Duplex pipes maximum operating temperature Hardness range of duplex alloy seamless pipe Duplex SS exhaust pipe tolerance
  • 300°C
  • 290 HB
  • ± 10 % or ± 0.2 mm
Duplex steel hot finished pipe hardness Duplex cold drawn pipe pressure rating Duplex metal clad pipe schedule
  • 1/2 hard
  • 1/6 hard
  • full hard
  • 3/8 hard
  • 1/8 hard
  • soft
  • 1/4 hard
  • 14BAR
  • 16BAR
  • 20BAR
  • MIL-T-16420K: Class 200, Class 500, Class 700
  • PN10
  • PN14
  • SCH10/ 10S
  • SCH80
  • SCH5/ 5S
  • SCH160
  • SCH40/ 40S
  • STD

A well-known supplier Manifest Alloys offers a wide range of duplex stainless steel pipe in all the required forms and sizes

For what is a duplex welded pipe utilized?

These pipes are most frequent in heavy industries due to their strength and corrosion resistance. a DSS welded pipe is standard in the oil and gas sectors, chemical processing, and petrochemical industries. Its corrosion resistance helps it work dependably in wastewater treatment plants and seawater applications. Paper and nuclear plants and bridge construction projects also use these pipes.

We transmitted DSS pipes to Saudi Arabia, Qatar, and Israel in ten days.

Types of duplex stainless steel pipe


Duplex SS annealed pipe

Duplex SS annealed pipe

DSS cold drawn pipe

DSS cold drawn pipe

Duplex SS square pipe

Duplex SS square pipe

Duplex metal rectangular pipe

Duplex metal rectangular pipe

Duplex bright annealed pipe

Duplex bright annealed pipe

Duplex stainless steel exhaust pipe

Duplex stainless steel exhaust pipe

DSS welded pipe

DSS welded pipe

Duplex metal clad pipe

Duplex metal clad pipe

Duplex steel seamless pipe

Duplex steel seamless pipe

For quality assurance, we offer NDT testing for dss pipe and sa790 pipe, as well as a comparison of the two

What is the difference between a DSS pipe?

A stainless steel pipe has a minimum of 10% chromium in its composition. It is manufactured in ferritic (magnetic) and austenitic (non-magnetic) grades. In contrast, DSS pipes comprise ferritic and austenitic grades in their microstructure (50-50%). They display desirable properties like high strength, tolerance to stress corrosion cracking, and suitability for temperatures up to -50°c or lower.

Chemical composition of DSS welded pipe


Mo C Mn Cr Ni Si P S N Fe
3.00-3.50
.030 Max
2.00 Max
22.0-23.0
4.50-6.50
1.00 Max
.030 Max
.020 Max
0.14-0.20
Balance

Searching for genuine DSS pipe supplier in India?, for detail information, contact us

We provide a broad selection of products in high strength duplex welded pipe and astm a790 pipe grades

What is a schedule chart and the price of a duplex pipe?

The schedule chart shows the wall thickness for the corresponding pressure and temperature. It will determine the inside diameter of the pipe. DSS round pipes can cost between rs. 500 to rs. 600 per kilogram. The price is less than austenitic stainless steel grades due to the lower nickel and molybdenum content.

Duplex stainless steel seam welded pipe services


Duplex stainless steel seam welded pipe services
 

Mechanical properties of duplex ERW pipes


Grade % Elongation YS (MPa) Hardness(BHN) UTS (MPa)
S31803 25 min. 450 min. 293 max. 620 min.
View duplex ss pipe and DSS ERW pipe schedule chart & pipe price

What are the grades and specifications of a duplex pipe?

Buyers can acquire a dss pipe in multiple grades. The common ones are 2205 (22% chromium, 5% nickel, and 3% molybdenum) and 2304 (23% chromium and 4% nickel, no molybdenum). The standard specification is a240 uns s31803 or s32205.

Equivalent grade of duplex seamless pipes


STANDARD WERKSTOFF NR. UNS
Duplex 1.4462 S31803 / S32205

Duplex SS pipe forms


Duplex SS pipe forms
 

Size chart of DSS EFW pipes


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

Duplex steel welded pipe applications


Duplex steel welded pipe applications
 

Duplex pipe price list


Outside Dia Wall Thk IN. Schedule KG/Mtr Rate Per Kgs (INR) Price in USD Price in Dirham Delivery Time  CFR Charges in USD(Till any port)
MM MM
13.72 1.65 1/4'' 10S 0.5 396 US $4.75 AED 17.42 25 to 35 days 224
13.72 2.24 1/4'' 40S 0.64 402 US $4.82 AED 17.61 226
13.72 3.02 1/4'' 80S 0.81 408 US $4.89 AED 17.80 228
17.15 1.65 3/8'' 10S 0.64 414 US $4.97 AED 18.01 230
17.15 2.31 3/8'' 40S 0.86 420 US $5.04 AED 18.20 232
17.15 3.2 3/8'' 80S 1.12 426 US $5.11 AED 18.39 234
21.34 2.11 1/2'' 10S 1.02 432 US $5.18 AED 18.58 236
21.34 2.77 1/2'' 40S 1.29 438 US $5.26 AED 18.79 238
21.34 3.73 1/2'' 80S 1.65 444 US $5.33 AED 18.98 240
26.67 2.11 3/4'' 10S 1.3 450 US $5.40 AED 19.17 242
26.67 2.87 3/4'' 40S 1.71 456 US $5.47 AED 19.36 244
26.67 3.91 3/4'' 80S 2.23 462 US $5.54 AED 19.55 246
33.4 2.77 1 10S 2.13 468 US $5.62 AED 19.76 248
33.4 3.38 1 40S 2.54 474 US $5.69 AED 19.95 250
33.4 4.55 1 80S 3.29 480 US $5.76 AED 20.14 252
33.4 6.352 1 160 4.3 486 US $5.83 AED 20.33 254
42.16 2.77 10S 2.73 492 US $5.90 AED 20.52 256
42.16 3.56 40S 3.44 498 US $5.98 AED 20.73 258
42.16 4.85 80S 4.53 504 US $6.05 AED 20.92 260
42.16 6.352 160 5.69 510 US $6.12 AED 21.11 262
48.26 2.77 10S 3.16 516 US $6.19 AED 21.30 264
48.26 3.68 40S 4.11 522 US $6.26 AED 21.49 266
48.26 5.08 80S 5.49 528 US $6.34 AED 21.70 268
60.33 2.77 2 10S 3.99 534 US $6.41 AED 21.89 270
60.33 3.91 2 40S 5.52 540 US $6.48 AED 22.08 272
60.33 5.54 2 80S 7.6 546 US $6.55 AED 22.27 274
60.33 8.742 2 160 11.29 552 US $6.62 AED 22.46 276
73.03 3.05 10S 5.35 558 US $6.70 AED 22.67 278
73.03 5.16 40S 8.77 564 US $6.77 AED 22.86 280
73.03 7.01 80S 11.59 570 US $6.84 AED 23.05 282
88.9 3.05 3 10S 6.56 576 US $6.91 AED 23.24 284
88.9 5.49 3 40S 11.47 582 US $6.98 AED 23.43 286
88.9 7.62 3 80S 15.51 588 US $7.06 AED 23.64 288
88.9 11.132 3 160 21.67 594 US $7.13 AED 23.83 290
101.6 3.05 10S 7.53 600 US $7.20 AED 24.02 292
101.6 5.74 40S 13.78 606 US $7.27 AED 24.21 294
101.6 8.08 80S 18.92 612 US $7.34 AED 24.40 296
114.3 3.05 4 10S 8.5 618 US $7.42 AED 24.61 298
114.3 6.02 4 40S 16.32 624 US $7.49 AED 24.80 300
114.3 8.56 4 80S 22.67 630 US $7.56 AED 24.99 302
114.3 13.492 4 160 34.05 636 US $7.63 AED 25.18 304
141.3 6.55 5 40S 22.1 642 US $7.70 AED 25.37 306
141.3 9.53 5 80S 31.44 648 US $7.78 AED 25.58 308
141.3 15.882 5 160 49.87 654 US $7.85 AED 25.77 310
168.28 3.4 6 10S 14.04 660 US $7.92 AED 25.96 312
168.28 7.11 6 40S 28.69 666 US $7.99 AED 26.15 314
168.28 10.97 6 80S 43.21 672 US $8.06 AED 26.34 316
168.28 14.27 6 120 54.75 678 US $8.14 AED 26.55 318
168.28 18.262 6 160 68.59 684 US $8.21 AED 26.74 320
219.08 8.18 8 40S 43.2 690 US $8.28 AED 26.93 322
219.08 12.7 8 80S 65.63 696 US $8.35 AED 27.12 324
219.08 18.23 8 120 91.3 702 US $8.42 AED 27.31 326
219.08 23.012 8 160 112.97 708 US $8.50 AED 27.52 328

Working pressure of duplex alloy annealed pipe


Tube O.D. (in.)   1/2 1 1/8 5/16 1/4 3/8 03/4
Wall Thicknes (inches) 0.028 Working Pressure (psig)     7900   3700    
0.035 2300   10100 3700 4800 3100  
0.049 3200     5400 7000 4400 2200
0.065 4400 2200   7300 9500 6100 3000
0.083   2900         4000
0.095   3400         4600
0.109   3900          
0.12   4300          

Wall thickness chart of duplex SS seam welded pipe


SCH 40S 3,38 2,77 2,87 3,56 3,91 3,68 5,16 5,74 5,49 6,55 6,02 SCH 40S 9,27 7,11 8,18 9,53 SCH 40S
SCH 10S 2,77 2,11 2,11 2,77 2,77 2,77 3,05 3,05 3,05 3,40 3,05 SCH 10S 4,19 3,40 3,76 4,78 4,57 4,78 5,54 4,78 6,35 SCH 10S
DN 1″ 1/2″ 3/4″ 1 1/4″ 2″ 1 1/2″ 2 1/2″ 3 1/2″ 3″ 5″ 4″ DN 10″ 6″ 8″ 14″ 12″ 16″ 20″ 18″ 24″ DN
Ø 33,40 21,34 26,67 42,16 60,32 48,26 73,03 101,60 88,90 141,30 114,30 Ø 273,08 168,29 219,08 355,60 323,85 406,40 508,00 457,20 609,60 Ø
SCH 160 6,35 4,78 5,56 6,35 8,74 7,14 9,52   11,13 15,88 13,49 SCH 160 28,58 18,26 22,23 33,32 SCH 160
SCH 80S 4,55 3,73 3,91 4,85 5,54 5,08 7,01 8,08 7,62 9,53 8,56 SCH 80S 12,70 10,97 12,70 12,70 SCH 80S

Tolerance of DSS cold drawn pipe


OD > 1 1/2″ < 5″ 1/8″ < 2″ > 8″ < 20″ > 4″ < 10″ > 26″ < 32″ > 18″ < 28″
Permissible deviations In mm +0,8 / -0,8 +0,4 / -0,8 +2,4 / -0,8 +1,6 / -0,8 +4,0 / -0,8 +3,2 / -0,8
Wall thickness % -12,5 -12,5 -12,5 -12,5 -12,5 -12,5