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Stainless Steel Heat Exchanger Tubes – ASTM A213 / A249, EN 10216-5 | Seamless & Welded

Our Stainless Steel Heat Exchanger Tubes are engineered for applications requiring high corrosion resistance, durability, and long service life.
They are widely used in chemical plants, desalination units, marine environments, and power generation where carbon steel is not suitable.
Available in seamless (cold drawn) and welded (ERW / TIG welded) forms, these tubes comply with international standards for heat exchangers, boilers, and condensers.

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Key Features

·Exceptional corrosion resistance in harsh environments
·Available in seamless and welded executions
·High strength at both ambient and elevated temperatures
·Complies with ASTM, EN, DIN standards
·Long service life with reduced maintenance costs

Technical Specifications

Parameter	Specification
Standards	ASTM A213 / A249, EN 10216-5, DIN 17456
Typical Grades	304, 304L, 316, 316L, 321, 347
OD (Outside Diameter)	12.7 – 101.6 mm
Wall Thickness (WT)	1 – 6 mm
Length	Up to 12 m (cut-to-length available)
Manufacturing Process	Seamless (cold drawn), Welded (ERW/TIG)
Heat Treatment	Solution Annealed, Pickled, Passivated
Surface Finish	Bright Annealed, Polished, Pickled

Common Sizes

·Ø19.05 mm x 2.11 mm (3/4 in x 0.083 in)
·Ø25.4 mm x 2.11 mm (1 in x 0.083 in)
·Ø31.8 mm x 2.77 mm (1.25 in x 0.109 in)
·Ø38.1 mm x 2.77 mm (1.5 in x 0.109 in)
·Ø50.8 mm x 3.68 mm (2 in x 0.145 in)

(Customized OD / WT available)

Manufacturing Process

1. Raw material – stainless steel billets or hot rolled strips
2. Tube formation – seamless extrusion / welded (ERW / TIG)
3. Cold drawing for dimensional accuracy
4. Heat treatment – solution annealing for corrosion resistance
5. Surface finishing – bright annealed, polished, or pickled
6. Inspection – hydrostatic, Eddy Current, UT, mechanical testing

Applications

·Chemical Processing Plants
·Desalination & Marine Applications
·Food & Beverage Industry
·Power Generation – Condensers & Heat Exchangers
·Pharmaceutical & Clean Environments

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About Us

Jiangsu Suao Metal Product Co., Ltd.

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. 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. 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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