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Duplex · Super Duplex · Hyper Duplex · Seamless · Welded · ERW/EFW — All grades, ASME certified, global supply

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Duplex 2205 Pipe - Ragnar Metals
Duplex Steel Pipe

Duplex Stainless Steel Pipe & Tube

Duplex stainless steel pipes combine the excellent corrosion resistance of austenitic grades with the strength of ferritic grades. Available in grades 2101, 2205 and 2304. Used in offshore, subsea, chemical processing, pulp & paper and desalination plants.

Duplex 2205 (UNS S32205) Duplex 2101 (UNS S32101) Duplex 2304 (UNS S32304) UNS S31803 (F51) EN 1.4462 EN 1.4362
StandardsASTM A790 / A789, ASME SA790 / SA789
Size Range½" – 24" OD | 0.5 mm – 80 mm (tubes)
ScheduleSCH 5S – XXS
TypesSeamless, Welded, ERW, EFW, SAW, LSAW
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Super Duplex Pipe - Ragnar Metals
Super Duplex Pipe

Super Duplex Stainless Steel Pipe & Tube

Super duplex pipes offer a PREN > 40 for exceptional chloride pitting and crevice corrosion resistance. Grade S32750 (2507) and S32760 are preferred for aggressive seawater, FGD, and subsea umbilical and flowline applications.

Super Duplex 32750 (S32750) Super Duplex S32760 (Zeron 100) S32550 (Ferralium 255) EN 1.4410 ASTM A790 F53
StandardsASTM A790 / A789, ASME SA790 / SA789
Size Range½" – 24" OD | Tube OD: 6 – 150 mm
ScheduleSCH 5S – XXS
TypesSeamless, Welded, EFW, SAW
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Hyper Duplex Pipe - Ragnar Metals
Hyper Duplex Pipe

Hyper Duplex Stainless Steel Pipe

Hyper duplex pipes have PREN > 48, offering the highest chloride resistance available in duplex stainless steels. Grades UNS S32707 and S33207 are designed for deep-sea, geothermal and high-chloride chemical processing environments.

UNS S32707 UNS S32808 UNS S33207
PREN> 48 (highest chloride resistance)
Size Range½" – 12" OD
TypesSeamless, Welded, EFW
ApplicationsDeep-Sea, Geothermal, High-Chloride Chemical
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Seamless Pipe - Ragnar Metals
Seamless Pipe

Seamless Pipe & Tube

Seamless pipes are extruded without a weld seam, offering uniform strength around the full circumference. Preferred for high-pressure, high-temperature applications in oil & gas, hydraulic and instrumentation systems.

Duplex 2205 Seamless Super Duplex 32750 Seamless Hyper Duplex Seamless SS 304L / 316L Seamless Copper Alloy Seamless
StandardsASTM A790 (duplex), ASTM A312 (SS), ASTM B111 (copper)
OD Range6 mm – 610 mm (seamless)
Wall ThicknessSCH 5S, 10S, 40S, 80S, 160, XXS
TestingHydrostatic, Eddy Current, Ultrasonic, PMI
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Welded ERW EFW Pipe - Ragnar Metals
Welded Pipe

Welded Pipe (ERW, EFW, SAW, LSAW)

Welded duplex and super duplex pipes are available in ERW (Electric Resistance Welded), EFW (Electric Fusion Welded), SAW (Submerged Arc Welded) and LSAW (Longitudinal SAW) forms. Cost-effective for larger diameter and structural applications.

ERW — Duplex 2205 EFW — Super Duplex 32750 SAW — Duplex 2101 LSAW — Duplex 2304 UOE — Large Diameter
StandardsASTM A928 (welded), ASTM A790
OD Range½" – 120" (depending on type)
TypesERW, EFW, SAW, LSAW, UOE, Cold-Drawn
TestingRadiography, Hydrostatic, Ultrasonic, PMI
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Copper Alloy Tube - Ragnar Metals
Copper Alloy Tube

Copper & Copper Alloy Pipe & Tube

Non-ferrous pipes and tubes in copper, brass, aluminium bronze, phosphorus bronze, beryllium copper, gunmetal and Zeron 100. Used in heat exchangers, condensers, marine, desalination and HVAC applications for their excellent thermal conductivity and seawater resistance.

Copper C12200 / C10100 Brass C26000 / C28000 Aluminium Bronze C63000 Phosphorus Bronze C51000 Beryllium Copper C17200 Gunmetal Aluminium Pipe
StandardsASTM B111, ASTM B68, ASTM B88, BS 2871
OD Range3 mm – 300 mm
TypesSeamless, Drawn, Extruded
ApplicationsHeat Exchangers, Marine, Desalination, HVAC
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Browse All Pipe & Tube Pages

Explore all grades, standards and types of pipe & tube we manufacture & export

Duplex Pipe — By Grade
Duplex Pipe
Duplex Stainless Steel Pipe
Duplex 2205 Pipe
Duplex 2101 Pipe
Duplex 2304 Pipe
Duplex F51 Pipe
Duplex F53 Pipe
Duplex F55 Pipe
Duplex F60 Pipe
UNS S31803 Pipe
UNS S32205 Pipe
UNS S32101 Pipe
UNS S32304 Pipe
EN 1.4162 Pipe
EN 1.4362 Pipe
EN 1.4462 Pipe
Duplex Steel Pipe & Tube — Mfr & Exporter
Duplex Pipe — By Type & Process
Duplex Seamless Pipe
Duplex Welded Pipe
Duplex 2205 Seamless Pipe
Duplex 2205 ERW Pipe
Duplex 2205 EFW Pipe
Duplex 2205 LSAW Pipe
Duplex 2205 SAW Pipe
Duplex 2205 UOE Pipe
Duplex LSAW Pipe
Duplex SAW Pipe
Cold Drawn Duplex Pipe
Hot Finished Duplex Pipe
Fabricated Duplex Pipe
Duplex Round Pipe
Duplex Square Pipe
Duplex Rectangular Pipe
Super Duplex & Hyper Duplex Pipe
Super Duplex Pipe
Super Duplex 2507 Pipe
Super Duplex S32750 Pipe
Super Duplex S32760 Pipe
UNS S32750 Pipe
UNS S32760 Pipe
SD 2507 Seamless Pipe
SD 2507 ERW Pipe
SD 2507 EFW Pipe
SD 2507 Welded Pipe
SD Steel Pipe & Tube — Mfr & Exporter
EN 1.4410 Pipe
Hyper Duplex Pipe
Hyper Duplex Seamless Pipe
Hyper Duplex Welded Pipe
UNS S32707 Hyper Duplex Pipe
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Aluminium Pipe & Tube
Aluminium Bronze Pipe & Tube
Beryllium Copper Pipe & Tube
Gunmetal Pipe & Tube
Phosphorus Bronze Pipe & Tube
Zeron 100 Pipe & Tube
By International Standard
ASTM A790 Duplex Pipe
ASTM A928 Duplex Pipe
ASME SA790 Duplex Pipe
ASME SA928 Duplex Pipe
API Duplex Pipe
API Super Duplex Pipe
EN 10216 Duplex Pipe
EN 10217 Duplex Pipe
DIN Duplex Pipe
ISO Duplex Pipe
NACE MR0175 Duplex Pipe
NORSOK M630 Duplex Pipe
IBR Approved Duplex Pipe
PED Approved Duplex Pipe
All Grades & Countries

Pipe & Tube — All Grade & Country Pages

Duplex 2101, 2205, 2304, Super Duplex S32750, Brass, Nickel Alloys — seamless, welded, EFW, ERW with country export pages.

Duplex Steel Pipes & Tubes
All Duplex Steel Pipe & Tube Pages
Grade & Overview
Duplex Pipe — Mfr, Supplier & Exporter Duplex SS Pipe Duplex Steel Pipe Duplex Pipe Supplier Duplex 2101 Pipe 2101 Pipe Exporter 2101 Pipe Mfr Duplex vs Super Duplex
Standards & Specs
ASME SA790 SA790 Exporter ASTM A790 ASME SA789 Tube API Duplex Pipe DIN Duplex Pipe 2101 Seamless 2101 Welded 2101 ERW 2101 EFW 2101 SAW
Duplex 2101 — By Country
Bahrain Canada Indonesia Kuwait Malaysia Mexico Oman Qatar Singapore UAE Saudi Arabia
Super Duplex Pipes
Super Duplex Pipe — Mfr, Supplier & Exporter Super Duplex SS Pipe Super Duplex Supplier SA790 Super Duplex API Super Duplex Super Duplex Pipe Mfr
Brass & Copper Pipes & Tubes
All Brass & Copper Pipe Pages
Copper & Brass Pipes
Copper Pipe & Tube Brass Pipe & Tube Brass Pipes & Tubes Brass Pipe
Other Non-Ferrous Pipes
Aluminium Bronze Pipe Al Bronze Pipe Mfr Aluminium Pipe Aluminium Pipe Mfr Beryllium Copper Pipe Beryllium Copper Pipe Mfr
Brass Pipe — By Country
Bahrain Kuwait Oman Qatar Saudi Arabia UAE
Nickel Alloy Pipes & Tubes
All Nickel Alloy Pipe Pages
By Alloy
Nickel Alloy Pipe Mfr Inconel Pipe & Tube Hastelloy Pipe & Tube Monel Pipe & Tube Titanium Pipe & Tube

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