Duplex Steel Welded Tube
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A duplex steel welded tube is a type of tubular product fabricated from duplex stainless steel through the welding process. Duplex stainless steel is a unique alloy that combines the desirable characteristics of austenitic and ferritic stainless steel. One of the key properties of duplex steel welded tube is their exceptional strength, which allows them to withstand high pressures and heavy loads. Additionally, these tube exhibit excellent resistance to corrosion, including resistance to stress corrosion cracking, making them suitable for various challenging environments.
Specification Of Duplex Steel Weld Tube
| Tube Standard | ASTM A789 / ASME SA789 |
| Welded Tube Sizes | 1 / 2" NB - 24" NB |
| Tube Outside Diameter | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24" NB available Ex-stock, OD Size Steel Tube available Ex-stock |
| Tube Manufacturing Process | Welded |
| Duplex Steel Tube Schedule | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Tube Length | Single Random, Double Random, Standard & Cut length |
| Tube End Types | Plain Ends (PE), Threaded Ends (TE), Bevelled Ends (BW), Grooved Mechanical Joints or Grooved Ends, TBE (Treaded Both Ends) |
| Delivery Condition | Annealed and Pickled, Polished, Bright Annealed, Cold Drawn |
| Outside Finish | 2B, No.4, No.1, No.8 Mirror Finish for Duplex Steel Tubes, Finish as per customer Requirements |
| Value Added Services | Cutting, Beveling, Polishing, Threading, Destructive, Non Destructive, Ultrasonic Testing |
How does the manufacturing process of duplex steel welded tubes differ from other types of steel tubes?
The manufacturing process of duplex steel welded tube differs from other types of steel tube, primarily in the welding method used. Duplex steel welded tube are typically produced using two common techniques: automatic tungsten inert gas (TIG) welding and the automatic plasma welding processes. These methods allow precise control over the welding parameters, ensuring a high-quality and consistent weld. Additionally, duplex stainless steel requires careful attention to heat input during welding to maintain the desired microstructure and material properties.
Specialized equipment and expertise are often required to handle the specific challenges associated with duplex steel welding, such as maintaining proper interpass temperatures and avoiding excessive heat-affected zone (HAZ) formation. Overall, the manufacturing process of duplex steel welded tube involves specific considerations and techniques tailored to the unique characteristics of duplex stainless steel to ensure the production of durable and reliable tubular products.
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