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{"title":"Hot Dip GI Construction Scaffolding Round Welded Pre Galvanized Steel Pipe","imgUrl":"https:\/\/img.chinax.com\/nimg\/a2\/1f\/f905e7a26d01ffde1e4381a7d83a-200x200-1\/hot_dip_gi_construction_scaffolding_round_welded_pre_galvanized_steel_pipe.jpg","attrs":{"Brand Name":"TOBO\/TPCO\/TISCO\/VALIN\/METAL","Model Number":"1.4835 Stainless Steel Seamless Pipe","Certification":"ISO\/PED\/TUV\/SGS\/LR\/BV","Place of Origin":"China\/Japan\/Germany"}}
This Marine Desalination Duplex 2205 Seamless Stainless Steel Pipe is produced from the 2205 duplex grade (UNS S31803 / EN 1.4462), a two phase stainless steel with a balanced ferritic and austenitic microstructure. This structure combines high strength with outstanding resistance to chloride pitting, crevice corrosion and stress corrosion cracking, making the pipe an excellent choice for seawater desalination, offshore platforms, shipbuilding and marine cooling systems.
Where 316L would pit in warm chlorinated seawater, 2205 duplex maintains integrity and extends the working life of the plant. The pipe is manufactured by the cold drawn seamless process and supplied pickled and annealed in outside diameters from 6 mm to 630 mm and wall thickness from 0.5 mm to 30 mm.
Because duplex 2205 has roughly twice the yield strength of 304 or 316, thinner walls can often be used for the same pressure duty, saving weight and cost on large desalination projects. Each heat is tested for chemical composition, phase balance and mechanical properties, and supplied with a mill test certificate for full traceability.
Technical Specifications
Parameter
Value
Material Grade
2205 / UNS S31803 / EN 1.4462
Standard
ASTM A790 / ASME SA790
Outer Diameter
6 mm - 630 mm
Wall Thickness
0.5 mm - 30 mm
Length
6 m / 12 m or cut to length
Corrosion Resistance
Resistant to chloride pitting and seawater corrosion
Roughly double the yield strength of 304 or 316 allows thinner, lighter pipe walls
Excellent performance in warm chlorinated seawater where austenitic grades may fail
Seamless body avoids weld seam corrosion in marine and offshore service
Cost effective alternative to super duplex when conditions allow
Full chemistry, phase balance and mechanical test data with each heat
Typical Applications
Seawater desalination plants
Offshore platforms and marine cooling systems
Shipbuilding and shipboard piping
Chemical and petrochemical seawater service
Pollution control and flue gas desulphurisation
Frequently Asked Questions
Q: Why choose duplex 2205 for seawater service?
A: Duplex 2205 combines high strength with excellent resistance to chloride pitting and stress corrosion cracking, so it outperforms 316L in warm seawater and lasts far longer.
Q: Is duplex pipe stronger than 304 or 316?
A: Yes. The yield strength of 2205 is roughly twice that of common austenitic grades, which can allow thinner walls for the same pressure rating and reduce overall weight and cost.
Q: Does this pipe comply with ASTM A790?
A: Yes. It is manufactured to ASTM A790 and ASME SA790 for seamless and welded ferritic and austenitic stainless steel pipe, and other standards can be produced on request.
Q: What is the delivery time?
A: Stock items ship in 10 to 20 days and production orders take 25 to 35 days. Please contact us with your project specification for a quotation.
Every shipment is backed by our experienced export team, who assist with material selection, documentation and logistics so that your procurement runs smoothly from enquiry to delivery. We welcome OEM and ODM orders and can supply trial quantities for evaluation. Please contact us with your drawing or specification for a quotation, free technical advice and the latest stock list for this corrosion resistant seamless stainless steel pipe range.
TOBO GROUP sales head offce in Shanghai.
We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area ... TOBO GROUP sales head offce in Shanghai.
We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area ...