What is ASTM A213 material?
ASTM A213/ASME SA213 covers low alloy steel pipes and minimum-wall-thickness, seamless ferritic and austenitic steel, boiler and super-heater tubes and austenitic steel heat-exchanger tubes, designated Grades TP304,TP304H,TP304L,TP310S, TP310HCbN, TP316, TP316H, TP316L etc.
What is ASTM A269 Tubing?
ASTM A269 seamless stainless steel tubing is suitable for both low-temperature and high-temperature service conditions. This type of tubing is manufactured from austenitic stainless steel materials using electric-resistance welding, electric-fusion welding, or seamless cold-drawing processes. Furthermore, SA269 tubing can undergo various surface treatments and is amenable to heat treatment.
ASTM A269 vs. ASTM A213: Key Differences
ASTM A213 and ASTM A269 differ primarily in application: A213 is for high-pressure/temperature seamless boiler and heat exchanger tubes, while A269 covers general-service, corrosion-resistant, often welded, stainless steel tubing. A213 requires stricter testing (100% NDT/hydrostatic) compared to the more flexible A269.
| Feature | ASTM A213 | ASTM A269 |
| Title / Scope | Seamless Ferritic & Austenitic Boiler, Superheater, and Heat-Exchanger Tubes. | Seamless & Welded Austenitic Stainless Steel Tubing for General Service. |
| Primary Focus | High-Pressure & High-Temperature environments. | Corrosion Resistance & Cleanliness in general systems. |
| Manufacturing Method | Seamless Only | Seamless or Welded |
| Material Grades | Austenitic (TP304, 316L) & Ferritic/Martensitic (T11, T22, T91). | Austenitic only (TP304, 316L, 321, 347, etc.). |
| Hardness Test | Mandatory (Brinell or Rockwell). | Not mandatory (unless specified by the buyer). |
| Flaring Test | Mandatory for all tubes. | Not required for all sizes. |
| Wall Thickness | Usually specified as Minimum Wall. | Usually specified as Average Wall. |
| Common Applications | Boilers, Superheaters, Power Plant Heat Exchangers. | Chemical processing, Food & Dairy, Instrumentation, Laboratory tubing. |
ASTM A213 vs. A269 Dimensional Tolerances
1. Wall Thickness (WT) Tolerance: The "Minimum Wall" Factor
ASTM A213 (Pressure Service): Usually ordered as Minimum Wall (MW). This means the wall thickness can never be thinner than the specified value. To ensure this, the manufacturer produces tubes with a positive tolerance.
ASTM A269 (General Service): Usually ordered as Average Wall (AW). The actual thickness can fluctuate slightly above or below the nominal value.
| Dimension | Outside Diameter (OD) Tolerance | Wall Thickness (WT) Tolerance |
| ASTM A213 (Seamless) | ± 0.004" to ± 0.012" (Size dependent) | + 20% / - 0% (for Minimum Wall) |
| ASTM A269 (Seamless) | ± 0.005" to ± 0.015" (Size dependent) | ± 10% (for Average Wall) |
| ASTM A269 (Welded) | ± 0.005" to ± 0.020" (Size dependent) | ± 10% (for Average Wall) |
2. Outside Diameter (OD) Tolerance Table (Ref: ASTM A1016)
| OD Range (inches) | OD Tolerance (inches) | OD Tolerance (mm) |
| < 1.000" | ± 0.004" | ± 0.10 mm |
| 1.000" to 1.500" | ± 0.006" | ± 0.15 mm |
| > 1.500" to < 2.000" | ± 0.008" | ± 0.20 mm |
what is ASTM A213 Tube sizes?
ASTM A213 steel tubes are available in a wide range of seamless ferritic and austenitic steel grades (e.g., T91, T22, TP304, TP316), specifically designed for high-temperature service conditions and primarily utilized in boilers and heat exchangers. Common specifications feature an outside diameter (OD) ranging from 1/8" to 16" (3.2 mm to 406 mm) and a wall thickness ranging from 0.015" to 0.500" (0.4 mm to 12.7 mm).
ASTM A213 vs. A269 Pressure Ratings
Pressure ratings are not explicitly "listed" in the ASTM standards; instead, they are calculated based on the Allowable Stress values defined in the ASME Boiler and Pressure Vessel Code (BPVC).
ASTM A213: Since it is a boiler/superheater tube, it is a code-approved material with defined allowable stress values at specific temperatures (e.g., at 400°C or 600°C).
ASTM A269: It is not an ASME code-approved material for pressure vessels in many jurisdictions. It is used for instrumentation and general piping. If high-pressure service is required, engineers often specify Dual Certification (A213/A269) to ensure the tube meets the pressure safety requirements of A213.
What is the difference between A213 and A249?
What is the difference between ASTM A249 and A213? ASTM A249 is a standard specification for welded austenitic steel boiler, superheater, heat-exchanger, and condenser tubes. ASTM A213 is a standard specification for seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes