ASTM A-688 Stainless Steel Welded Heat Exchanger & Condenser Tubes

High Precision • Austenitic Grades • Superior Corrosion Resistance

Manufacturers and suppliers of ASTM A-688 Stainless Steel Welded Heat Exchanger & Condenser Tubes, engineered for chemical processing, power generation, oil & gas, food processing, pharmaceuticals, and general corrosion in high-temperature and pressure service environments.

ISO 9001:2015 • ISO 14001:2015 • ISO 45001:2018 • PED 2014/68/EU • EN 10204 3.1/3.2 Certified

ASTM A-688 Stainless Steel Welded Heat Exchanger & Condenser Tubes

Our ASTM A-688 Stainless Steel Welded Heat Exchanger & Condenser Tubes are engineered for demanding industrial environments where high thermal efficiency, corrosion resistance, and long-term service reliability are essential. ASTM A-688 covers austenitic stainless steel tubing grades such as TP304, TP304L, TP316, TP316L, TP321, and TP347, which provide excellent resistance to oxidation, general corrosion, and scaling in elevated temperature and pressure service conditions.

The precision welded construction ensures consistent wall thickness, smooth internal surfaces, and reliable dimensional tolerances, reducing pressure loss and improving heat transfer efficiency in critical thermal systems. These tubes perform reliably in chemical, petrochemical, power generation, and process industry applications.

Widely used in heat exchangers, condensers, boilers, reactors, and process piping, our ASTM A-688 tubes are manufactured and tested to meet international standards, delivering a durable, high-performance, and cost-effective solution for high-temperature and corrosive operating environments.

ASTM A-688 Stainless Steel Welded Heat Exchanger & Condenser Tubes

Comprehensive Reach

Our ASTM A-688 Stainless Steel Welded Heat Exchanger & Condenser Tubes are trusted across major industrial cities in India and throughout the Middle East, including the UAE, Saudi Arabia, Qatar, Kuwait, Oman, Bahrain, Iraq, and Jordan, supporting oil & gas, water treatment, power generation, chemical processing, and large-scale infrastructure and EPC projects.

In Europe, we supply Italy, Germany, Spain, the United Kingdom, France, Turkey, and Eastern European markets, where our ASTM A-688 austenitic stainless steel welded tubes are valued for their corrosion resistance, dimensional precision, and reliable performance in high-temperature and high-pressure thermal systems.

Africa, Americas & Asia-Pacific

Across Africa, the Americas, and the Asia-Pacific region, our ASTM A-688 stainless steel heat exchanger and condenser tubes support chemical plants, petrochemical facilities, power stations, marine systems, and heavy manufacturing industries, delivering dependable performance in corrosive, high-temperature, and continuous-duty operating environments.

Commitment to Quality

Wherever you operate—Doha, Dubai, London, Houston, Singapore, or New York— Seminox Pipes & Tubes delivers premium-quality ASTM A-688 Stainless Steel Welded High Precision Heat Exchanger & Condenser Tubes, manufactured and certified to international standards for durability, traceability, and long-term performance in critical thermal and process service applications.

Key Features of ASTM A-688 Stainless Steel Welded Heat Exchanger & Condenser Tubes

ASTM A-688 Welded Precision Manufacturing

Manufactured in accordance with ASTM A-688 specifications using high-frequency electric resistance welding (ERW), followed by solution annealing and pickling to ensure uniform wall thickness, precise dimensional tolerances, and smooth internal surfaces for consistent heat transfer and fluid flow performance.

Austenitic Stainless Steel Corrosion Resistance

Produced in austenitic stainless steel grades such as TP304, TP304L, TP316, and TP316L, providing excellent resistance to general corrosion, oxidation, and chemical attack in thermal, marine, and industrial processing environments.

High Temperature & Pressure Performance

Designed to withstand elevated temperatures and operating pressures commonly encountered in heat exchangers, condensers, boilers, and petrochemical processing systems.

Optimized Heat Transfer Efficiency

Smooth bore finish and consistent weld integrity enhance thermal conductivity, reduce fouling tendencies, and improve long-term efficiency in continuous-duty heat exchanger and condenser applications.

Weld Integrity & Non-Destructive Testing

Each tube undergoes Eddy Current Testing (ECT) or Hydrostatic Testing to verify weld soundness, pressure integrity, and compliance with ASTM A-688 quality and performance requirements.

Long Service Life & Low Lifecycle Cost

Engineered for extended operational durability, reduced maintenance, and dependable performance in power generation, chemical processing, petrochemical plants, refineries, and marine heat transfer systems.

Product Specification – ASTM A-688 Stainless Steel Welded Heat Exchanger & Condenser Tubes

Outside Diameter
6.35 mm to 114.30 mm (1/4” to 4.5”)
Wall Thickness
0.71 mm to 12.70 mm (0.028” to 0.500”)
Grade / Material
Austenitic Stainless Steel
ASTM Grades: TP304 / TP304L / TP316 / TP316L / TP321 / TP347
UNS: S30400 / S30403 / S31600 / S31603 / S32100 / S34700
EN: 1.4301 / 1.4307 / 1.4401 / 1.4404 / 1.4541 / 1.4550
Manufacturing Process
Welded (ERW / HFIW) • Solution Annealed • Pickled / Bright Annealed • Straightened
Standards & Specifications
ASTM A-688 / A-688M – Welded Austenitic Stainless Steel Tubes (Heat Exchanger & Condenser)
ASME SA-688
EN 10217-7 – Welded Stainless Steel Tubes (Where Applicable)
ASTM A249 – Welded Stainless Steel Boiler, Heat Exchanger & Condenser Tubes (If Required)
Customer Drawings & EPC / Project Specifications
Length
Standard: 6 meters • Random Lengths • Up to 24 meters
Custom cut lengths as per EPC / Project Requirements
Surface Finish
Annealed & Pickled (AP), Bright Annealed (BA),
Polished (180 / 240 / 320 / 400 Grit), Electropolished
Mechanical Properties (Typical – TP304/TP316)
Yield Strength: ≥ 205 MPa
Tensile Strength: ≥ 515 MPa
Elongation: ≥ 35%
Applications
Heat Exchangers & Condensers, Boilers & Thermal Systems,
Petrochemical & Chemical Processing Units,
Power Generation & Refineries,
Marine & Offshore Cooling Systems,
Pressure Equipment & Industrial Heat Transfer Systems

Manufacturing, Testing & Quality Assurance – ASTM A-688

Advanced Manufacturing

ASTM A-688 Austenitic Stainless Steel Welded Tubes are produced using high-precision Electric Resistance Welding (ERW / HFIW) followed by full solution annealing and pickling or bright annealing. This process ensures a homogeneous microstructure, excellent corrosion resistance, and uniform mechanical properties across both the base metal and weld seam, delivering consistent dimensional accuracy for critical heat exchanger, condenser, and high-temperature service applications.

Inspection & Testing

Each tube undergoes comprehensive quality control including Eddy Current Testing (ECT) of the full weld seam, Hydrostatic or Non-Destructive Pressure Testing, Positive Material Identification (PMI), chemical analysis, mechanical testing, dimensional verification, and 100% visual inspection. These procedures ensure full compliance with ASTM A-688 / ASME SA-688 requirements and reliable performance in high-pressure, high-temperature, and corrosive service environments.

Certifications & Compliance

Manufactured in accordance with ASTM A-688 / ASME SA-688, EN 10217-7, ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, and PED 2014/68/EU directives. Tubes are supplied with EN 10204 3.1 / 3.2 Mill Test Certificates (MTC), ensuring full material traceability, regulatory compliance, and acceptance for EPC, refinery, petrochemical, power generation, and industrial heat transfer projects worldwide.

Typical Applications of ASTM A-688 Stainless Steel Welded Heat Exchanger & Condenser Tubes

Heat Exchangers, Condensers & Cooling Systems
Petrochemical & Refinery Process Equipment
Power Generation & Thermal Transfer Systems
Chemical Processing Plants & Reactors
Boilers, Superheaters & Economizers
Oil & Gas Utilities & Process Piping
Pharmaceutical & Biotechnology Facilities
Food & Beverage Processing Systems
High-Temperature & Corrosive Service Environments

Need ASTM A-688 Stainless Steel Welded Heat Exchanger & Condenser Tubes for Your Project?

Partner with Seminox Pipes & Tubes for certified, project-ready ASTM A-688 Stainless Steel Welded High Precision & Heat Exchanger Tubes manufactured to ASTM A688 / ASME SA688 / EN 10217-7 standards and supplied with EN 10204 3.1 / 3.2 Mill Test Certificates (MTC). Trusted worldwide for petrochemical, power generation, chemical processing, pharmaceutical, and high-temperature service environments requiring precision welding, corrosion resistance, and long-term operational reliability.

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