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Astm A790 / A789 UNS S31803 Duplex Pipe Tube

Original price was: $6,500.00.Current price is: $5,200.00. $5,200.00

ASTM A790 / A789 Uns S31803 duplex pipe tube is a duplex stainless steel tube with good chloride stress resistance, ASTM A790 Uns s31803 contains 21% Chrome 4.5% nickel and 2.5% molybdenum.Kcm Special Steel will supply excellent ASTM A789 UNS S31803 duplex tube and pipe with seamless and welded types.

SKU: uns-s31803-pipe-tube Category: Tags: , Brand:
Description

Description

ASTM A789 / ASTM A790 UNS S31803 DUPLEX PIPE TUBE BRIEF INTRODUCTION

ASTM A790 Uns s31803 / ASTM A789 Uns S31803 duplex pipe tubeΒ is a stainless steel tube with good chloride stress resistance, Uns s31803 contains 21%Β Chrome 4.5% nickel and 2.5% molybdenum.

β€ŒASTM A790 S31803β€Œ Is Duplex stainless steel (austenitic-ferritic) with 22% Cr, 5% Ni, 3% Mo, and 0.15% N, offering high strength/pitting resistance for welded/seamless tubing.

ASTM A789 UNS S31803β€Œ Is Austenitic-ferritic duplex stainless steel (22% Cr, 5% Ni, 3% Mo, 0.15% N) for seamless/welded mechanical tubing, offering superior pitting/crevice corrosion resistance in aggressive environmentsβ€Œ

ASTM A789 / ASTM A790 Uns S31803 duplex pipe tubeΒ isΒ duplex stainless steel pipe and a medium alloy duplex stainless steel with good chloride stress resistance. Medium alloy type – the representative grade is UNS S31803 (22Cr-5Ni-3Mo-0.15N); S31803 duplex steel pipe is in three kinds of dual phase steel (2205 duplex stainless steel pipe,Β 2507 duplex stainless steel pipe, S31803 duplex stainless steelΒ seamlessΒ tube) is the most widely used.

Name ASTM A789 / ASTM A790 UNS S31803 Duplex pipe tubeΒ  Β  Β Material: Duplex Stainless steel

Properties: Good chloride resistance stress RepresentativeΒ  Β grade: UNS S31803 / UNS S32205 / SAF 2205

Brand: KCM Special Steel

ASTM A790 UNS S31803 Is Standard for Seamless and Welded Ferritic-Austenitic Stainless Steel Pipe

ASTM A789/ASTM A790 UNS S31803 Duplex Pipe/Tube

ASTM A789/ASTM A790 UNS S31803 Duplex Pipe/Tube supplier and manufacturer in CHINA, contact us to get High performance SA789/SA790 UNS S31803 duplex pipe/tube for marine applications.

ASTM A790 UNS S31803 Pipe Scope of application

1.1 This specification2 covers seamless and straight-seam welded ferritic/austenitic steel pipe intended for general corrosive service, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.

1.2 Optional supplementary requirements are provided for pipe when a greater degree of testing is desired. These supplementary requirements call for additional tests to be made and, when desired, one or more of these may be specified in the order.

1.3 Appendix X1 of this specification lists the dimensions of welded and seamless stainless steel pipe as shown in ANSI B36.19. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specification.

1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. The inch-pound units shall apply unless the M designation of this specification is specified in the order.

NOTE 1: The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as nominal diameter, size, and nominal size.

What Is ASTM A790 UNS S31803 Pipe?

ASTM A790 UNS S31803 Pipe & tube is a duplex stainless steel. 22% chromium duplex ( austenitic/ferritic ) steel ( type 2205 / UNS S32205 ) with moderate to high strength and good resistance to common corrosion/stress, corrosion/cracking.

The alloy ofΒ ASTM A790 UNS S31803 Pipe & tube is resistant to chloride environments and sulfide stress corrosion and is approximately twice as strong as standard austenitic stainless steels. This alloy can be successfully used as a replacement for 300 series austenitic stainless steels when higher mechanical strength/lower weight is required. The F51 is easy to weld with many standard arc welding equipment, but is not recommended for oxy-ethylene block welding due to the potential for carburization of the weld metal.

ASTM A789/ASTM A790 UNS S31803 Duplex Pipe/Tube

ASTM A789/ASTM A790 UNS S31803 Duplex Pipe/Tube Supplier and manufacturer in CHINA, contact us to get high performance and reasonable price of sa789/sa790 uns s31803 duplex pipe/tube.

ASTM A789 / ASTM A790 UNS S31803 Pipe & tube Executive Standard

ASTM A789 / ASTM A790 UNS S31803 Chemical Composition:

β€ŒElementβ€Œβ€ŒContent Range (wt%)β€Œ
Carbon (C)≀ 0.030
Silicon (Si)≀ 1.00
Manganese (Mn)≀ 2.00
Phosphorus (P)≀ 0.030
Sulfur (S)≀ 0.020
Chromium (Cr)21.00–23.00
Nickel (Ni)4.50–6.50
Molybdenum (Mo)2.50–3.50
Nitrogen (N)0.08–0.20
Copper (Cu)≀ 0.50
Iron (Fe)Balance

ASTM A789 / ASTM A790 UNS S31803 Physical Properties:

β€ŒPropertyβ€Œβ€ŒValue Rangeβ€Œ
Tensile Strength760–1000 MPa
Yield Strength550–750 MPa
Elongation (at Break)β‰₯25%
Hardness (Brinell)≀290 HB

ASTM A789 / ASTM A790 UNS S31803Β  Heat treatment: heat preservation between 1020-1100 ℃ for 1-2 hours, rapid air cooling or water cooling.

β€ŒProcessβ€Œβ€ŒTemperature Rangeβ€Œβ€ŒCooling Methodβ€Œβ€ŒKey Notesβ€Œ
β€ŒSolution Annealingβ€Œ1020–1100Β°CRapid cooling (e.g., water)Essential to avoid prolonged exposure to brittle temperature ranges (475Β°C) β€Œ
β€ŒPost-Weld Heat Treatmentβ€ŒGenerally not requiredβ€”Preheating and post-weld heat treatment are unnecessary for most applications β€Œ

ASTM A789 / ASTM A790 UNS S31803 Pipe & tube Mechanical properties:

β€ŒPropertyβ€Œβ€ŒValue Rangeβ€Œ
β€ŒTensile Strengthβ€Œ620–1000 MPa β€Œ
β€ŒYield Strength (0.2% offset)β€Œ450–750 MPa β€Œ
β€ŒElongation (at Break)β€Œβ‰₯25% β€Œ
β€ŒHardness (Brinell)β€Œβ‰€290 HB
β€ŒImpact Energy (Charpy V-notch)β€Œβ‰₯100 J (at 20Β°C) β€Œ

ASTM A790 UNS S31803 PIPE & TUBE (UNS S31803 stainless steel pipe) is an ultra-low carbon duplex stainless acid-resistant steel with excellent resistance to pitting and crevice corrosion. At the same time, nitrogen is a strong element that forms and stabilizes austenite. Even if it is welded or heated at high temperature, it can ensure that a certain amount of austenite exists in the structure. Single-phase ferrite. The two-phase ratio is not sensitive to changes in heating temperature.

ASTM A789 Is Standard for Seamless and Welded Ferritic / Austenitic Stainless Steel Tubing

Scope of application

1.1 This specification2 covers grades of average wall thickness, or, if specified on the order, minimum wall thickness, of stainless steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.

1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Within the text, the SI units are shown in brackets. The inch-pound units shall apply unless the M designation of this specification is specified in the order.

Thickness Chart Of ASTM A789 / ASTM A790 UNS S31803 Pipes In Stock or for new production.

NPSOutside DiameterWall ThicknessWeightWeight
inmminmmSchedkg/MtrLb/ft
1/2β€³0.840210.1092.76940 STD1.2680.851
0.1473.73480 STD1.6211.088
3/4β€³1.050270.1132.87040 STD1.6841.131
0.1543.91280 STD2.1951.474
1β€³1.315330.1333.37840 STD2.5011.679
0.1794.54780 STD3.3252.172
1 1/4β€³1.660420.1403.55640 STD3.3852.273
0.1914.85180 STD4.4642.997
1 1/2β€³1.900480.1453.68340 STD4.0482.718
0.2005.08080 STD5.4093.361
2β€³2.375600.1543.91240 STD5.4413.653
0.2185.53780 STD7.4805.022
2 1/2β€³2.875730.2035.51640 STD8.6295.793
0.2767.01080 STD11.4117.661
3β€³3.500890.2165.48640 STD11.2847.576
0.3007.62080 STD15.27210.253
4β€³4.5001140.2376.02016.07310.790
0.3378.56022.31814.983
6β€³6.6251680.1884.77519.25212.924
0.2035.51620.73913.923
0.2195.56322.31814.983
0.2506.35025.35417.021
0.2807.11240 STD58.26318.974
0.3127.92531.33421.036
0.3759.52537.28525.031
0.43210.97380 XHY42.56128.573
0.50012.70048.71932.708
8β€³8.6252190.1884.77525.23316.940
0.2035.15627.19818.259
0.2195.56329.28619.661
0.2506.3502033.30822.361
0.2777.0363036.78624.696
0.3228.1794042.35228.554
0.3759.52549.21633.041
0.40610.3126053.08535.638
0.50012.70080 XHY64.62743.388
10β€³10.7502730.1884.77531.58821.207
0.2195.56336.68924.631
0.2506.3502041.75928.035
0.3077.7983051.00234.240
0.3448.73856.94638.231
0.3659.27140 STD63.30140.483
0.43811.12571.85248.238
0.50012.70060 XHY81.53054.735
0.59415.0888095.96964.429
12β€³12.7503240.1884.77537.57025.222
0.2195.56343.65729.309
0.2506.35049.71333.375
0.2817.13755.73937.420
0.3127.92561.73541.445
0.3759.52573.82449.562
0.40610.31279.72753.525
0.50012.70097.43865.415
0.56214.275108.96673.154
14β€³14.0003560.1884.77541.30827.732
0.2195.56348.01232.233
0.2506.3502054.68536.713
0.2817.13761.32741.172
0.3127.92567.93945.611
0.3759.525STD81.28154.568
0.43811.1254094.49863.441
0.50012.700XHY107.38172.090
0.62515.875132.98389.278
16”16.0004060.1884.77547.29021.748
0.2195.56354.98036.910
0.2506.3501062.63942.053
0.2817.13770.26847.174
0.3127.9252077.86652.275
0.3448.73885.67757.519
0.3759.52530

STD

93.21362.578
0.43811.125108.43372.797
0.50012.70040

XHY

123.28982.770
18β€³18.0004570.2195.56361.94841.588
0.2506.35070.59347.393
0.2817.13779.20853.176
0.3127.9252087.79258.939
0.3759.525STD105.14470.588
0.43811.12530122.36982.152
0.50012.700XHY139.19893.450
0.56214.27540155.904104.666
0.62515.875172.754115.978
20β€³20.0005080.2506.35078.54752.733
0.2827.16388.45859.386
0.3127.92597.71965.604
0.3759.52520 STD117.07578.598
0.43811.125136.30591.508
0.50012.70030 XHY155.106104.130
0.59415.08840183.378123.110
0.62515.875192.640129.328
0.68817.475211.368141.901
24β€³24.0006100.2506.35094.45663.413
0.2817.137106.02971.183
0.3127.925117.57318.932
0.3759.52520 STD140.93864.618
0.43811.125164.176110.219
0.50012.700XHY186.923125.490
0.62515.875232.410156.028
0.68817.47540255.148171.293
0.75019.050277.401186.233
30β€³30.0007620.2506.350118.31879.433
0.2817.137132.85189.189
0.3127.92510147.35398.925
0.3759.525STD176.731118.648
0.43811.125205.983138.286
0.50012.70020 XHY234.647157.530
0.62515.87530292.066196.078
0.68817.475320.817215.380
0.75019.050348.988234.293
36β€³36.0009140.2506.350142.18095.453
0.2817.137159.672107.196
0.3127.92510177.133118.918
0.3759.525STD215.525142.678
0.43811.125247.790166.353
0.50012.70020 XHY282.372198.570
0.62515.875351.723236.128
0.68817.475386.487259.467
0.75019.050420.576282.353
42β€³42.00010670.3127.925206.914138.911
0.3759.525STD248.319166.708
0.50012.700XHY33.097221.610
0.75019.050492.163330.413
48β€³48.00012190.3759.525STD284.112190.738
0.43811.125331.404222.487
0.50012.700XHY377.822253.650
0.75019.050563.750378.473
0.87522.225655.969440.383
ASTM A789/ASTM A790 UNS S31803 Duplex Pipe/Tube in stock

Large quantity stock of ASTM A789/ASTM A790 UNS S31803 Duplex Pipe/Tube, KCM Special Steel Is SA789/SA790 uns s31803 duplex pipe/tube manufacturer & supplier in CHINA, contact us for more details now!

ASTM A790 / ASTM A789 UNS S31803 Pipe duplex Stainless Steel products scope

β€ŒProduct Typeβ€Œβ€ŒStandardβ€Œβ€ŒManufacturing Processβ€Œβ€ŒKey Applicationsβ€Œβ€ŒProperties & Advantagesβ€Œ
β€ŒSeamless Pipe/Tubeβ€ŒASTM A790/A789, ASME SA-790/SA-789β€ŒHot extrusion, cold drawingOffshore pipelines, high-pressure oil/gas systems, geothermal energy systemsβ€ŒSuperior strength (620–1000 MPa tensile), resistance to chloride stress corrosionβ€Œ
β€ŒWelded Pipe/Tubeβ€ŒASTM A790β€Œ, ASME SA-790β€ŒTIG welding, laser weldingChemical processing equipment, desalination systems, shipbuildingβ€ŒBalanced ferrite-austenite microstructure, weldability with minimal intermetallic phasesβ€Œ5
β€ŒPipe Fittings (Elbow, Tee, Reducer,Cross, Stub end)β€ŒASTM A403β€Œ, ASME B16.9β€Œ, ASTM A815Forging or machiningPipeline connections in corrosive environments (e.g., marine, chemical plants)β€ŒMatching corrosion resistance and mechanical strength with base pipesβ€Œ
β€ŒPipe Capsβ€ŒASTM A403β€Œ, ASME B16.9β€Œ, ASTM A815Cold forming or machiningSealing ends of pipelines, pressure vesselsEnhanced sealing performance under cyclic loadingβ€Œ
β€ŒFlangesβ€ŒASME B16.5β€Œ/ASME B16.47A/ ASTM A182Forging, machiningOffshore platform piping, chemical reactor connectionsHigh fatigue resistance, compatibility with duplex piping systemsβ€Œ

ASTM A789 / ASTM A790 Uns S31803 pipe tube features

PREN value >34
The corrosion resistance of the medium alloy type ASTM A789 / ASTM A790UNS S31803 is between AISI 316L and 6% Mo+N austenitic stainless steel.
Yield strength is about 2 times stronger than 18-8 austenitic stainless steel.

ASTM A789 / A790 Uns S31803 duplex pipe tube applications:

β€ŒApplication Fieldβ€Œβ€ŒSpecific Products/Componentsβ€Œβ€ŒKey Properties Utilizedβ€Œ
β€ŒOil & Gas Industryβ€ŒOffshore pipelines, heat exchangers, subsea equipmentHigh chloride/sulfide corrosion resistance, stress corrosion cracking (SCC) resistance β€Œ
β€ŒChemical Processingβ€ŒPressure vessels, storage tanks, transport pipelines for corrosive chemicals (e.g., acids)Pitting resistance (PREN >34), mechanical stability in aggressive media β€Œ
β€ŒMarine Engineeringβ€ŒSeawater desalination systems, cooling pipes, shipbuilding componentsResistance to saltwater corrosion, high strength-to-weight ratio β€Œ
β€ŒPulp & Paper Industryβ€ŒBleaching equipment, pulp digesters, chemical storage tanksDurability in chloride-containing environments, weldability β€Œ
β€ŒPower Generationβ€ŒHeat exchangers, condensers, geothermal energy systemsThermal stability, fatigue resistance under high-temperature/pressure cycles β€Œ
β€ŒOther Applicationsβ€ŒFood processing equipment, structural components in harsh environmentsHygienic surface, combined strength and ductility β€Œ

β€ŒASTM A789 / A790 UNS S31803 Material Advantages:β€Œ

  • β€ŒDual-phase microstructureβ€ŒΒ (ferrite + austenite) ensures balanced strength (620–1000 MPa tensile) and corrosion resistanceβ€Œ.
  • Complies withΒ β€ŒASTM A790/A790Mβ€Œ ASTM A789/789M and β€ŒASME SA-790β€Œ, ASME SA-789 standards for seamless/welded duplex pipes in industrial useβ€Œ.
  • Superior weldability and resistance to chloride-induced stress corrosion cracking (SCC)β€Œ

β€ŒASTM A789/ASTM A790 UNS S31803 Pipe/Tube Customer Success Storiesβ€Œ

β€ŒCase 1: Offshore Oil & Gas Pipeline Upgrade (Malaysia)β€Œ

β€ŒClientβ€Œ: Petronas Carigali
β€ŒIndustry Challengeβ€Œ:
Subsea pipelines in the South China Sea faced accelerated pitting corrosion (3.2 mm/year) due to high chloride concentrations (28,000 ppm) and Hβ‚‚S exposure. Existing 316L pipes required bi-annual replacements, costing $1.2M/year in downtime.

β€ŒEngineered Solutionβ€Œ:

  • Supplied β€ŒS31803 duplex stainless steel tubesβ€Œ (OD 324 mm, WT 12.7 mm) with β€Œelectropolished inner surfacesβ€Œ (Ra ≀0.4ΞΌm, per ASTM B912).
  • Implemented β€Œargon back-purgingβ€Œ during welding to prevent sigma phase formation.
  • Delivered β€ŒNACE MR0175-compliantβ€Œ material for sour service environments.

β€ŒMeasurable Outcomesβ€Œ:

  • β€ŒFlow Efficiencyβ€Œ: 15% improvement via reduced turbulence.
  • β€ŒCorrosion Rateβ€Œ: Dropped to 0.05 mm/year (ISO 9223 Class C5-M).
  • β€ŒROIβ€Œ: Full cost recovery within 14 months.

β€ŒClient Testimonialβ€Œ:
“The duplex tubes eliminated unplanned shutdowns. We’ve standardized this solution across 18 offshore platforms.”

β€ŒCase 2: Chemical Processing Plant Expansion (Germany)β€Œ

β€ŒClientβ€Œ: BASF SE
β€ŒOperational Pain Pointβ€Œ:
316L pipes in a nitric acid distillation unit (65% concentration, 110Β°C) failed catastrophically within 8 months, causing $850k in production losses.

β€ŒTechnical Interventionβ€Œ:

  • Provided β€ŒASTM A790 S31803 seamless pipesβ€Œ (Sch 80S, 219.1 mm OD) with optimized chemistry:
    • β€ŒCr/Mo/N Boostβ€Œ: 23.2% Cr, 3.2% Mo, 0.18% N (exceeding ASTM A790 minima).
    • β€ŒSolution Annealingβ€Œ: 1040Β°C water quenching for 50/50 austenite-ferrite phase balance.
  • Conducted β€ŒASTM G48 Method Aβ€Œ testing: CPT = 42Β°C (vs. 35Β°C requirement).

β€ŒPerformance Metricsβ€Œ:

  • β€ŒService Lifeβ€Œ: Extended from 8 months to 5+ years.
  • β€ŒMaintenance Costsβ€Œ: Reduced by 72% annually.
  • β€ŒSafetyβ€Œ: Eliminated 3 critical HSE incidents/year linked to pipe bursts.

β€ŒClient Feedbackβ€Œ:
“These pipes handle pH 0.8 environments flawlessly. A textbook example of materials science solving industrial problems.”

β€ŒTechnical Specifications Deep Diveβ€Œ

β€ŒMaterial Properties (ASTM A790 UNS S31803)β€Œ

ParameterValueTest Standard
β€ŒChemical Compositionβ€ŒCr: 22.0–23.0%, Mo: 3.0–3.5%, N: 0.14–0.20%ASTM A923
β€ŒMechanical Propertiesβ€Œ
  • Tensile Strength: β€Œ795-930 MPaβ€Œ
  • Yield Strength (0.2% offset): β€Œ550-620 MPaβ€Œ
  • Elongation: β€Œβ‰₯25%β€Œ (50 mm gauge length)
  • Hardness: β€Œ28–32 HRCβ€Œ (Rockwell C Scale)

β€ŒASTM A790 UNS S31803 Pipe Corrosion Resistanceβ€Œ

  • β€ŒPitting Resistance Equivalent (PRE)β€Œ:β€ŒPRE = %Cr + 3.3Γ—%Mo + 16Γ—%N = 36.2β€Œ
  • β€ŒCritical Crevice Temperature (CCT)β€Œ: 30Β°C (ASTM G48 Method B)
  • β€ŒStress Corrosion Crackingβ€Œ: Passed 1000h testing in boiling 45% MgClβ‚‚ (ASTM G36)

Astm A790 UNS S31803 Pipe/Tube anufacturing Tolerancesβ€Œ

DimensionTolerance
Outer Diameter (OD)Β±1.0% or Β±0.5mm (whichever is greater)
Wall Thickness (WT)+12%/-10%
Straightness≀1.5mm/m

β€ŒService Commitments & Value-Added Solutionsβ€Œ

β€Œ1. ASTM A789/ASTM A790 UNS S31803 Duplex Pipe/Tube Rapid Project Supportβ€Œ

  • β€Œ24/7 Quote onlineβ€Œ: Connect with certified materials quotation within 6 hours.
  • β€ŒDigital Twin Serviceβ€Œ: Upload your piping layout (PDMS/SP3D) for clash detection and stress analysis.

β€Œ2. ASTM A789/ASTM A790 UNS S31803 Duplex Pipe/Tube Certified Supply Chainβ€Œ

  • β€ŒMaterial Traceabilityβ€Œ: Full EN 10204 3.2 certification with heat-specific PMI reports.
  • β€ŒThird-Party Validationβ€Œ: Optional DNV GL/TÜV SÜD mill audits and product certification.

β€Œ3.ASTM A789/ASTM A790 UNS S31803 Pipe/tube Advanced Processingβ€Œ

  • β€ŒASTM A789/ASTM A790 Pipe/Tube Custom Fabricationβ€Œ:
    • Orbital TIG welding with 100% X-ray inspection (ASME B31.3).
    • Cold finished seamless with 100% quality compliance Standards of astm a790/ astm a789
    • U-bend tubes with 3D radius (1.5Γ—OD to 5Γ—OD) for heat exchangers.
  • ASTM A789/ASTM A790 Pipe/Tube Surface Treatmentsβ€Œ:
    • Electropolishing (Ra ≀0.4ΞΌm)
    • Solution Pickling very clean
    • Bead blasting (AA 120-grit finish)

β€Œ4. Global Logistics Networkβ€Œ

  • β€ŒStock Availabilityβ€Œ: 5,000 metric tons in stock for clients’ urgent applications.
  • β€ŒShipping Guaranteeβ€Œ:
    • EXW,FOB,CFR, CIF delivery to site within 45 days for orders >20 tons.
    • Real-time container tracking via blockchain-enabled platform.

β€ŒWhy Partner With Us?β€Œ

βœ… β€ŒUnmatched Expertiseβ€Œ: 17+ years specializing in duplex stainless steel systems – referenced in NACE SP0108-2023.
βœ… β€ŒSustainability Leadershipβ€Œ:

  • 100% Quality compliance with clients’ reques (ISO certified ).
  • Exllence quality and material grade.
  • 12 monthes guaranteed return and exchange.
  • Fast delivery and globally reach.
  • No MOQ request, clients’ satisfaction is our goal.

β€ŒASTM A789/ ASTM A790 UNS S31803 Duplex Pipe/Tube FAQβ€Œ

β€ŒQ1: What makes ASTM A790 UNS S31803 duplex pipes superior to 316L/317L for offshore applications?β€Œ

β€ŒA:β€Œ Our β€ŒASTM A790 S31803 duplex pipesβ€Œ provide:

  • β€Œ45% higher yield strengthβ€Œ (550 MPa vs. 380 MPa in 316L)
  • β€Œ2.5Γ— better chloride stress corrosion cracking resistanceβ€Œ (per NACE TM0177)
  • β€ŒThinner wall designsβ€Œ possible due to enhanced mechanical properties, reducing material costs by 18-22%.

β€ŒQ2: Do your astm a789/ a790 uns s31803 Duplex pipes/tubes comply with sour service requirements?β€Œ

β€ŒA:β€Œ Yes. All β€Œduplex stainless steel pipesβ€Œ are:

  • β€ŒNACE MR0175/ISO 15156 ComplianceΒ for Hβ‚‚S environments
  • Compliance to β€ŒNACE TM0284 (Hydrogen Induced Cracking)β€Œ standards
  • PMI-verified for standard levels.

β€ŒQ3: Can you customize ASTM A789/ASTM A790 UNS S31803 Duplex pipe/tube dimensions beyond standard ASTM specs?β€Œ

β€ŒA:β€Œ Absolutely. We specialize in β€Œnon-standard duplex pipe fabricationβ€Œ:

  • β€ŒOD Rangeβ€Œ: 10mm – 2000mm (with Β±0.3mm precision)
  • β€ŒWall Thicknessβ€Œ: 1.0mm – 80mm (including SCH 5S to SCH XXS)
  • β€ŒCutting Servicesβ€Œ: Plasma, laser, or abrasive waterjet to Β±0.15mm tolerance.

β€ŒQ4: What surface finishes are available for corrosion resistance?β€Œ

β€ŒA:β€Œ Choose from:

  • β€ŒElectropolished (EP)β€Œ: Ra ≀0.4ΞΌm (ideal for β€Œhigh-purity chemical processingβ€Œ)
  • β€ŒPickled & Passivatedβ€Œ: ASTM A380-compliant oxide layer
  • β€ŒBead Blastedβ€Œ: Uniform 120-220 grit profile for aesthetic applications.

β€ŒQ5: How do you ensure material traceability?β€Œ

β€ŒA:β€Œ Every pipe includes:

  • β€ŒEN 10204 3.1/3.2 certificatesβ€Œ with heat number tracking
  • β€ŒPMI Test Reportsβ€Œ (XRF verification of alloy composition)
  • β€ŒMill Test Reportsβ€Œ covering mechanical properties and hydrostatic tests.
  • Third Party Inspection is acceptble

β€ŒQ6: What’s your lead time for urgent offshore projects?β€Œ

β€ŒA:β€Œ We guarantee:

  • β€Œ3-5-day turnaroundβ€Œ for standard sizes from our stock
  • β€Œ30-day productionβ€Œ for custom orders (vs. industry-average 45 days)
  • β€Œ24/7 logistics coordinationβ€Œ with real-time β€ŒCFR,CIFΒ shipping updatesβ€Œ.

β€ŒQ7: What if we need technical support after delivery?β€Œ

β€ŒA:β€Œ Our β€ŒLifetime Technical Supportβ€Œ covers:

  • Free metallurgical consultation within 7 business hours
  • Online failure analysis (available in worldwide)
  • β€Œ12-monthes warrantyβ€Œ against manufacturing defects.

 

Additional information

Additional information

Weight1000 kg
Dimensions6000 × 7000 × 7000 mm
Color

Length

Condition

Size

Used Or New

Status