Our Carbon Steel Heat Exchanger Tubes are designed for use in low- to medium-temperature heat transfer applications, such as condensers, boilers, and economizers.
They are manufactured to ASTM, EN, and DIN standards, ensuring excellent thermal conductivity, mechanical strength, and dimensional precision. Both seamless and welded options are available to suit different project requirements.
Key Features
·High thermal conductivity and heat transfer efficiency
·Suitable for low- and medium-temperature service
·Seamless & welded tube manufacturing available
·Conforming to ASTM, EN, DIN international standards
·Excellent straightness and dimensional control
Technical Specifications
|
Parameter |
Specification |
|
Standards |
ASTM A179 / A192, EN 10216-1, DIN 17175 |
|
Typical Grades |
SA179, SA192, ST35.8, ST45.8, P235TR1 |
|
OD (Outside Diameter) |
12.7 – 101.6 mm |
|
Wall Thickness (WT) |
1.2 – 10 mm |
|
Length |
Up to 12 m (cut-to-length available) |
|
Manufacturing Process |
Seamless (hot finished / cold drawn), Welded (ERW) |
|
Heat Treatment |
Annealed, Normalized, Stress Relieved |
|
Surface Finish |
Pickled, Oiled, Polished |
Common Sizes
·Ø19.05 mm x 2.11 mm (3/4 in x 0.083 in)
·Ø25.4 mm x 2.77 mm (1 in x 0.109 in)
·Ø38.1 mm x 3.2 mm (1.5 in x 0.125 in)
·Ø50.8 mm x 3.68 mm (2 in x 0.145 in)
·Ø63.5 mm x 4 mm (2.5 in x 0.157 in)(Custom sizes available)
Manufacturing Process
1. Raw material selection – high-quality carbon steel billets/strips
2. Tube formation – seamless piercing & elongation or ERW welding
3. Cold drawing for precision (if required)
4. Heat treatment – annealed / normalized for ductility
5. Surface finishing – pickling, polishing, oiling
6. Testing – dimensional, hydrostatic, NDT (UT/ET)
Applications
·Boilers & Economizers
·Condensers & Heat Exchangers
·Industrial Process Cooling
·Refinery & Petrochemical Units
·Low to Medium Temperature Service
Suao is a professional manufacturer of high-precision cold drawn steel tubes, hydraulic tubes, and mechanical structure tubes, integrating R&D, production, inspection, and global sales. We operate two major production facilities covering over 36,000 square meters, with more than 200 employees and an annual output of 50,000+ tons, supplying customers across major industrial markets worldwide. As Suppliers of Alloy Steel Heat Exchanger Tubes – Seamless & Welded, High-Temperature Resistant, our integrated manufacturing capabilities include cold drawing, heat treatment, straightening, finishing, cutting, chamfering, and surface treatment. These are supported by a full range of advanced equipment for non-destructive testing, chemical analysis, and online dimensional monitoring—ensuring every tube meets stringent quality standards. We invest continuously in automation and smart manufacturing systems to enable flexible, high-mix, low-volume production. Custom Alloy Steel Heat Exchanger Tubes – Seamless & Welded, High-Temperature Resistant. Our products are widely used in construction machinery, hydraulic systems, automotive parts, wind energy, shipbuilding, railways, and oil & gas sectors. Certified to ISO 9001, ISO 14001, CE, and RoHS standards, Hongli is more than a manufacturer—we are a trusted long-term partner for global industrial clients.
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