Duplex Pipe
Duplex Stainless Steel Seamless Pipe and Duplex Welded Pipe supplier in India
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 Specification
- Why choose Naman Pipe & Tubes?
- Duplex Pipe Price List
- Different Types of Duplex Steel Pipes
- DSS Pipe Chemical Composition
- Duplex Welded Pipe Mechanical Properties
- Duplex Seamless Pipe Equivalent Grade
- DSS ERW Pipe Dimensions
- Duplex Stainless Steel Pipe Thickness
- DSS Seamless Pipe Sizes
- Duplex Stainless Steel Pipe Schedule Chart
- DSS Pipe Weight Chart
- Manufacturers' Marking on Duplex Pipe
- Advantages of Duplex Pipe
- Seamless Duplex Pipe Surface Roughness Chart
- DSS Pipe Pressure Rating
- DSS Welded Pipes Tolerances
- Tolerances on wall thickness of Seamless Duplex Pipe
- Specific heat capacity of DSS Pipe
- Duplex Stainless Steel Pipe Roughness
- DSS Pipe HS Code
- DSS Pipe Applications
- Duplex Pipe Welding Procedure
- Duplex Steel Pipes Stock List
- Various Manufacturing Process Of DSS Pipe
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 |
|
| Value Added Services | Honing, Mirror Polish, Crome Plating, Washing, De Rusting, Swaging, Bulging |
Why choose Maxicon Steel Industries?
- Established in 2016
- NACE MR0175/ISO 15156 tested material
- Reduced cost compared to other Duplex Pipe suppliers
- Extensive stock
- Tested Duplex Pipe material
Duplex Pipe Price List
$803.83
Per Kg
DSS PIPES SA790 DN 125 SCH. 160 ASME B36.10
$ 12.50
Per Kg
SMLS PIPES DSS SIZE:OD:114.30MM X 3.05
$ 2.06
Per Kg
Seamless Duplex Stainless Steel Pipe (A-790)
$2.28
Per Kg
SCH. 160 Duplex Seamless Pipe (ASME B36.10)
$ 2.07
Per Kg
STAINLESS STEEL SEAMLESS DSS PIPE (NPS5)
$ 2.33
Per Kg
SEAMLESS PIPES GRADE DSS 2 Inch Dia
$41.26
Per Kg
SCH.80S Duplex Welded Pipe, PREN MIN 40
$10.87
Per Kg
SCH 40S Duplex Welded Pipe, PREN MIN 40
$12.15
Per Kg
Seamless Duplex Pipe, 114.30MM OD, PE
Different Types of Duplex Steel Pipes
Duplex Pipe
Duplex Welded Pipe
Duplex Steel Pipes
Duplex Stainless Steel Pipe
Duplex Steel Pipe
Duplex Seamless Pipe
Duplex SS Pipe
DSS Pipe
DSS ERW Pipe
Seamless Duplex Pipe
SS Duplex Pipe
DSS Stainless Steel Seamless Pipe
Duplex Steel Welded Pipes
DSS Welded 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 Seamless 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 |
Specific heat capacity of DSS 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 |
Tolerances on wall thickness of Seamless Duplex 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)
Look who buy from Us and What
Doha West Power Station - Kuwait
Tanjung Bin Power Plant - Malaysia
