ASTM A269 TP304 304L Stainelss Steel Seamless Pipe For Heat Exchanger
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ASTM A269 TP304L seamless stainless steel tube for heat exchangers is a specialized austenitic stainless steel tube manufactured in strict accordance with ASTM A269 standards. It is designed for high-performance heat exchanger applications operating in chemically corrosive or high-temperature environments. As part of the 300-series stainless steels, it plays a critical role in heat exchanger systems used in power generation, chemical processing, and HVAC industries.
Our ASTM A269 TP304L seamless tubes are produced through hot extrusion or piercing, followed by cold rolling or cold drawing. These processes eliminate weld seams and improve dimensional accuracy. The seamless construction removes the risk of weld failure, which is essential for heat exchangers subjected to severe pressure cycles and thermal stress.
After forming, the tubes undergo solution annealing (heated to 1040–1150°C followed by rapid water quenching) to dissolve chromium carbides and maximize corrosion resistance. Finally, the tubes are acid pickled to remove surface oxides, ensuring a clean and uniform surface finish.
The surface finishing of ASTM A269 TP304L seamless stainless steel tubes includes annealed and pickled (No.1/2B, uniform silvery-grey) for enhanced corrosion resistance, and bright annealed (BA, smooth mirror finish) to reduce fluid friction and maintain hygiene, ensuring optimal performance in heat transfer applications.
A269 TP304 Seamless Round Stainless Steel Tube specification
| Outside Diameter | 3.2-25.4mm | |||||||||
| Wall Thickness | 0.2-2.5mm | |||||||||
| Length | As customer's requirement; In coil or in straight. | |||||||||
| Standard |
ASTM A213/ ASME SA213, ASTM A269/ASME SA269, EN10216-5, etc. |
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| Grade | TP304, TP304L, TP316, TP316L, TP321, TP247H, etc. | |||||||||
| Delivery Condition | Pickled, Polished, Bright Annealed | |||||||||
| Technique | Seamless/Welded | |||||||||
| Application | Automotive industry, Aircraft/Aerospace, Instrumentation & Electrical, Chemical Industry, etc. | |||||||||
| Marking | LOGO, Standard, Grade, Size, Heat Number. | |||||||||
| Package | Woven bag, wooden cases, or as per customer's requirement. | |||||||||
| Quality Requirement | Mill Test Certificate (EN 10204/3.1); Third Part Inspection is acceptable. | |||||||||
ASTM A269 Grade TP304L Bright Annealed Tubes Mechanical Properties
| Grade | Tensile | ||||
| Ultimate/Minimum | Yield/Minimum | Elongation/Minimum | |||
| MPA | KSI | MPA | KSI | % | |
| 304L | 485 | 70 | 170 | 25 | 35 |
Physical Properties of SA 269 Gr 304L Heat Exchanger Tubes
| Grade | Elastic Modulus (GPa) | Thermal Conductivity (W/m.K) | Density (kilogram/meter3) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | Mean Coefficient of Thermal Expansion (m/m/0C) | |||
|---|---|---|---|---|---|---|---|---|---|
| at 5000C | at 1000C | 0-3150C | 0-1000C | 0-5380C | |||||
| 304L | 193 | 21.5 | 16.2 | 8000 | 500 | 720 | 17.8 | 17.2 | 18.4 |
ASTM A269 Gr TP304L Seamless Tube Wall Thickness
| NPS | Tolerance, % | |
| + | – | |
| 3~18, t/D> 5% | 15 | 12.5 |
| 1/8-2 1 /2 | 20 | |
| ≥ 20, seamless, t/D≤ 5% | 22.5 | |
| ≥ 20, welded | 17.5 | |
| ≥ 20, seamless, t/D> 5% | 15 | |
| 3~18, t/D≤ 5% | 22.5 | |
Application
ASTM A269 TP304/304L seamless tubes are widely used in heat exchanger systems across various industries, including chemical processing (for handling corrosive fluids such as acids and alkalis), power generation (in steam generators and waste heat boilers), HVAC systems, and marine engineering (for seawater heat exchangers).
GNEE adheres to stringent quality control measures, including chemical composition testing, mechanical property verification, non-destructive testing (NDT), and third-party certification (such as EN 10204 3.1) to ensure full compliance with ASTM A269 standards. This ensures that every tube meets the demanding performance requirements of high-efficiency heat exchanger systems.
GNEE adheres to stringent quality control measures, including chemical composition testing, mechanical property verification, nondestructive testing (NDT), and third-party certification (such as EN 10204 3.1) to ensure full compliance with ASTM A269 standards. This ensures that each pipe meets the demanding performance requirements of high-efficiency heat exchanger systems.
All TP304L stainless steel round pipes are securely packaged in moisture-proof wooden crates or pallets to ensure safe transportation and maintain product quality.
