ASTM A269 / ASME SA269
ASTM A269 / ASME SA269 Seamless & Welded Austenitic Stainless Steel Tubes
Emirerri Steel is a trusted manufacturer and exporter of ASTM A269 / ASME SA269 stainless steel tubes, designed for general service applications in industries where corrosion resistance, durability, and reliability are critical. These tubes are widely used in heat exchangers, condensers, chemical processing, food processing, and general industrial applications.
What is ASTM A269 / ASME SA269?
ASTM A269 / ASME SA269 specifies seamless and welded austenitic stainless steel tubes for general service.
Tubes must meet mechanical properties, chemical composition, and corrosion resistance requirements as per ASTM/ASME standards.
They are available in a wide range of grades, finishes, and sizes to suit diverse industrial needs.
Common ASTM A269 / ASME SA269 Grades
TP304 / TP304L
Standard austenitic stainless steel grades.
Known for excellent corrosion resistance in a wide variety of environments.
Commonly used in food processing, chemical equipment, and general piping applications.
TP316 / TP316L
Contain molybdenum for enhanced corrosion resistance.
Better resistance to pitting and crevice corrosion, especially in chloride-rich environments.
Widely used in marine, chemical, and pharmaceutical industries.
TP321 / TP321H
Stabilized with titanium to resist sensitization after high-temperature exposure.
Excellent choice for high-temperature service where intergranular corrosion is a risk.
TP347 / TP347H
Stabilized with niobium (columbium) instead of titanium.
Prevents sensitization, ensuring resistance to intergranular corrosion.
Commonly used in refineries and high-temperature chemical processes.
Other Potential Grades
TP202: Chromium-nickel-manganese stainless steel for general service applications.
TP309S / TP310S: Higher-alloyed grades with superior oxidation and high-temperature resistance.
TP317 / TP317L: Higher molybdenum content than 316, providing even greater pitting and corrosion resistance.
904L: High-nickel, high-molybdenum austenitic stainless steel with exceptional corrosion resistance in aggressive environments such as sulfuric acid.
SMO 254 / Alloy 254: A super-austenitic stainless steel, offering superior resistance to stress corrosion cracking, pitting, and crevice corrosion in chloride-rich environments.
ASTM A269 / ASME SA269 Sizes
Fractional sizes (inches)
| Outer Diameter (OD) | Average Wall (WT) | Inner Diameter (ID) | Tube Cross Sectional Area (in²) | Approx. Weight (lb/ft) |
|---|---|---|---|---|
| 1/4″ (0.250) | 0.020″ | 0.210″ | 0.0145 | 0.05 |
| 1/4″ (0.250) | 0.035″ | 0.180″ | 0.0236 | 0.08 |
| 3/8″ (0.375) | 0.035″ | 0.305″ | 0.0374 | 0.13 |
| 3/8″ (0.375) | 0.049″ | 0.277″ | 0.0502 | 0.17 |
| 1/2″ (0.500) | 0.035″ | 0.430″ | 0.0511 | 0.17 |
| 1/2″ (0.500) | 0.049″ | 0.402″ | 0.0694 | 0.24 |
| 1/2″ (0.500) | 0.065″ | 0.370″ | 0.0888 | 0.30 |
| 5/8″ (0.625) | 0.035″ | 0.555″ | 0.0649 | 0.22 |
| 5/8″ (0.625) | 0.049″ | 0.527″ | 0.0887 | 0.30 |
| 5/8″ (0.625) | 0.065″ | 0.495″ | 0.1144 | 0.39 |
| 3/4″ (0.750) | 0.035″ | 0.680″ | 0.0786 | 0.27 |
| 3/4″ (0.750) | 0.065″ | 0.620″ | 0.1399 | 0.48 |
| 1″ (1.000) | 0.035″ | 0.930″ | 0.1061 | 0.36 |
| 1″ (1.000) | 0.065″ | 0.870″ | 0.1909 | 0.65 |
| 1-1/4″ (1.250) | 0.065″ | 1.120″ | 0.2420 | 0.82 |
| 1-1/2″ (1.500) | 0.065″ | 1.370″ | 0.2930 | 1.00 |
Metric sizes (millimeters)
| Outer Diameter (OD) | Wall Thickness (WT) | Inner Diameter (ID) | Approx. Weight (kg/m) |
|---|---|---|---|
| 6.35 mm | 0.25 mm | 5.85 mm | 0.103 |
| 10 mm | 0.5 mm | 9.0 mm | 0.27 |
| 12.7 mm | 0.5 mm | 11.7 mm | 0.32 |
| 15.88 mm | 0.75 mm | 14.38 mm | 0.53 |
| 19 mm | 1 mm | 17 mm | 0.77 |
| 25.4 mm | 1.5 mm | 22.4 mm | 1.37 |
| 38.1 mm | 2 mm | 34.1 mm | 2.21 |
| 50.8 mm | 3 mm | 44.8 mm | 3.94 |
Key Characteristics of ASTM A269 / SA269 Tubes
Manufacturing Process: Seamless or welded austenitic stainless steel.
Surface Finish: Annealed, pickled, polished, or bright finish available.
Testing: Tubes undergo hydrostatic or nondestructive electric tests to ensure quality.
Certification: Supplied with complete test certificates and documentation as per ASTM/ASME standards.
Applications
Heat Exchangers & Condensers
Chemical & Petrochemical Processing
Food & Beverage Industry
Marine Environments
Pharmaceuticals & Biotechnology
General Industrial Service