Duplex S31803 Seamless Tube

Duplex S31803 Seamless Tube

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Duplex S31803 Seamless Tubes:

Material Specfication and Dimension Standards:

Product CategoryMaterial Specification as per ASME/ASTM
High Pressure Seamless TubesASME SA213/213M TPS31803, ASTM A213/213M TPS31803, ASME SA269/269M TPS31803, ASTM A269/269M TPS31803, ASME SA270/270M TPS31803, ASTM A270/270M TPS31803, ASME SA249/249M TPS31803, ASTM A249/249M TPS31803

Size Range:

Outside DiameterThickness
6 mm OD to 219.1 mm OD0.7 mm Thick To 12.7 mm Thick

Notes : We can meet other dimensions outside the above mentioned range in special cases.

Why choose Us:


  • More than 30 years of expirience in this business
  • You can get stock options, mill deliveries with shortest manufacturing time
  • we assure you of as response in 24 hours (generally in same hour)
  • You will get the right material as per your requirement at the minimum possible price, (beware of unrealistic offers from other vendors)
  • 100% Fulfilment of commitments, if we cannot meet your requirement even after checking all options we will not give false assurance, this helps us in maintaining good relations with our customers
  • We can offer Exworks, FOB, CFR, CIF, Door to Door Delivery prices. We suggest that you let us do the shipping, because it will be cost effective as well as efficient
  • The materials we supply come with full traceability, right from raw material test certificate to final dimensional report. (Reports available on request)


UNS NosOther Names
UNS S3103duplex steel, dss steel, duplex stainless steel, F51


Seamless TubeHigh Pressure TubeInstrumentation TubeBoiler TubeCompression TubeHeat Exchanger Tubes
Bright Annealed TubesCold Drawn TubesElectro Polished Tubes 



  • We supply Duplex Stainless Steel to Pressure Vessel, Tanks and Heat Exchanger Manufacturers used in Chemical Process Plants and Oil and Gas Exploration
  • DSS is used a lot in Marine, Water and Waste Water Treatment Plants
  • Duplex is a big yes for Effluent scrubbing systems