Seamless Heat Exchanger Tube

Seamless Heat Exchanger Tube

Seamless heat exchanger tubes manufactured under the ASTM A179 standard are cold-drawn, low-carbon steel tubes designed specifically for efficient heat transfer in various thermal systems. These tubes are widely used in tubular heat exchangers, condensers, feedwater heaters, and evaporators due to their excellent thermal conductivity, high pressure tolerance, and smooth internal surface finish. The seamless construction ensures uniform wall thickness, eliminating the weak spots found in welded alternatives.

Available in a wide size range, these tubes have outside diameters from 6.00 mm to 101.00 mm, wall thicknesses from 0.85 mm to 12.7 mm, and lengths ranging from 1.0 meter to 27.0 meters. This broad dimension range allows for flexibility in design and integration across various heat transfer equipment. Manufactured using a cold-drawing process, ASTM A179 tubes maintain tight dimensional tolerances and superior surface quality—both crucial for efficient heat exchange performance.

The chemical composition of ASTM A179 tubes includes low carbon content (0.06–0.18%), manganese (0.27–0.63%), and minimal impurities (P ≤ 0.035%, S ≤ 0.035%)—a combination that ensures excellent formability, weldability, and corrosion resistance. Mechanically, these tubes deliver a minimum tensile strength of 325 MPa, yield strength of 180 MPa, elongation of at least 35%, and maximum hardness of 72 HRB, meeting the demands of high-efficiency thermal systems operating under continuous stress.

Importance of Seamless Heat Exchanger Tubes

In heat transfer systems, efficiency and reliability are paramount. Seamless ASTM A179 tubes are critical because they provide consistent internal surfaces for better fluid dynamics and superior heat conductivity, maximizing energy exchange while minimizing fouling and maintenance. Their seamless design also eliminates potential leak paths, ensuring long-term durability and safe operation, especially under high pressure and thermal cycling.

Industries such as power generation, chemical processing, oil refining, marine engineering, and HVAC systems rely on these tubes for critical applications where any failure can lead to costly downtime or equipment damage. By meeting strict dimensional and mechanical standards, ASTM A179 tubes guarantee safe, high-performance operation across a wide range of thermal systems.

Key Features:

• OD Range: 6.00 mm – 101.00 mm

• Wall Thickness: 0.85 mm – 12.7 mm

• Length: 1.0 m – 27.0 m

• Standard: ASTM A179 / ASME SA179

• Applications: Heat exchangers, condensers, feedwater heaters, evaporators

• Manufacturing: Seamless, cold-drawn, minimum wall thickness control

• Mechanical Properties:

  • Tensile Strength: ≥325 MPa

  • Yield Strength: ≥180 MPa

  • Elongation: ≥35%

  • Hardness: ≤72 HRB

• Chemical Composition: Low carbon, manganese, low phosphorus & sulfur