Stainless Steel Welded Tubes

NEOTISS supplies stainless steel welded tubes for heat exchangers in a full range of stainless steel materials for all types of environment. Our tubes can be straight, bent, smooth or finned. Each order is unique and every tube delivered has been individually produced, inspected and packaged.

Applications

We have developed the welding of very challenging grades like ferritic and duplex together with their associated super grades, achieving key parameters of performance including the balance of phase, dimensional tolerances and surface quality for wall thicknesses as thin as 0.5mm.

Ferritic stainless steels have been around for many years but were not widely used due to their welding and handling limitations. Our innovation teams played a key role in developing the optimised TP439 material which provides the best balance between corrosion resistance, mechanical properties and weldability.

With its austeno-ferritic phase, duplex stainless steel is becoming increasingly popular in pressure equipment thanks to its high mechanical properties and high corrosion resistance — ideal for heat exchangers handling aggressive liquids.

Benefits

Tube welding technology provides clear advantages, guaranteeing the best dimensional characteristics for the tubes. The thickness is constant and high-performance thin walls are possible. The diameter and weld bead thickness are always under control, as well as every metallurgical characteristic.

Available grades

• Austenitic: 304, 304L, 304N, 316, 316L, 317L, 321, 347
• Ferritic: 409, 430, 439, 441, 444
• Duplex: 2205 (UNS S31803/S32205), LDX 2101, 2507
• Super austenitic: AL6XN®, 254SMO®, 29-4C®

Standards

Manufactured to ASTM A249, A268, A688, A789, A803 and A1016, as well as EN standards. Full material certifications and third-party inspection available on request.