Stainless Steel ASTM A249 TP316L / 1.4404 Welded Bright Annealed Tube For Superheater

Stainless Steel ASTM A249 TP316L / 1.4404 Welded Bright Annealed Tube For Superheater
 

The ASTM A249 TP316L welded stainless steel bright annealed tube is the preferred choice for superheater sections in boilers and heat recovery steam generators. A superheater's function is to heat saturated steam beyond its boiling point to create superheated steam, which improves thermal efficiency and turbine performance. This environment demands tubes that can withstand internal high-pressure, external high-temperature flue gases, and potential corrosive condensates. The combination of TP316L's chemistry and the bright annealing process makes these tubes exceptionally resistant to oxidation, creep, and pitting/crevice corrosion in such demanding conditions. YUHONG GROUP has abundant manufacturing experience of ASTM A249 / ASME SA249 stainless steel welded tubes. We can produce such tubes from 6mm to 76.2mm outer diameter(regular size). And we can also cut into fixed length which is less than 35 meters.
 

Chemical Composition of Stainless Steel 316L Tubes:

Mechanical Properties:

Key Features of SS316L Bright Annealed Welded Tubes:

• Excellent Corrosion Resistance: SS316L (with 2-3% Molybdenum) offers superior resistance to pitting and crevice corrosion from chlorides and acidic condensates in superheaters.
• Low Carbon Content (<0.03%): The formation of chromium carbides at grain boundaries during welding or high-temperature service – thereby maintaining corrosion resistance in the heat-affected zone.
• High-Temperature Strength: Good mechanical strength and oxidation resistance at sustained temperatures up to ~870°C (intermittent use).
• Smooth, Clean Surface: The BA finish minimizes friction, improves heat transfer, reduces scaling/fouling, and is easy to clean. It also serves as a natural barrier to corrosion initiation.
• Cost-Effectiveness: Welded tubes offer a more economical alternative to seamless tubes for many pressure applications, with consistent wall thickness and excellent availability.

Different Applications of ASTM A249 TP316L Welded Tubes:

• Power Generation & Boilers: Superheater & Reheater Tubes, Economizer coils, Sootblower elements, Low-pressure heat exchangers.
• Heat Exchangers & Condensers: Shell-and-tube, coil, and plate-type heat exchangers for chemical, petrochemical, and marine industries.
• Food & Beverage and Pharmaceutical: Process lines, hygienic tubing, and CIP/SIP systems where the smooth, non-porous BA finish is critical.
• Architecture & Automotive: For structural components, fuel lines, and aesthetic applications requiring a bright finish.
• Semiconductor: High-purity gas and fluid delivery lines.