What is the difference between ASTM A269 and A249?
What is the difference between ASTM A269 and A249?
ASTM A249 / A249M are standard specifications for welded austenitic stainless steel boiler, superheater, heat exchanger, and condenser tubing.
ASTM A269 / A269M are general-purpose standard specifications for seamless and welded austenitic stainless steel tubing.
ASTM A249 and ASTM A269 specifications are two ASTM standards for Austenitic stainless steel tubes, the difference between ASTM A249 and ASTM A269 is that ASTM A249 covers welded tubes while ASTM A269 covers not only welded tubes but also seamless tubes, they have differences in tolerances, tests, and applications, in practice, ASTM A249/ASTM A269 dual certificated standard is required to finish quality tubes.
What is the ASTM A269 equivalent to?
ASTM A-269 & Its equivalent ASME, DIN & EN Standard. 202, 304, 304L, 304H, 304LN, 309S, 310S, 316, 316L, 316H, 316Ti, 316LN, 317L, 321, 321H, 347, 347H, 904L, SMO 254, ALLOY 254, 6MO, 6MOLY, UNS S31254 ETC. 01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size.
Comparison of ASTM A249 and ASTM A269
ASTM A249 and ASTM A269 specifications are two standards for Austenitic stainless steel tubes.
| Specification | ASTM A249 | ASTM 269 |
| Tube Manufacturing | Welded | Welded And Seamless |
| Application | Boiler Superheater Heat-Exchanger Condenser |
General Service |
| Sizes | OD: maximum 304.8 mm Wall Thickness: 0.4 – 8.1 mm |
Inside Diameter: minium 3.4 mm Wall Thickness: 0.51 mm |
| ASTM / ASME | ASTM A249 ASME SA249 |
ASTM A269 / A269M |
| Test | Flange Test | Flange Test |
A249 VS A269 Scope Of Application
ASTM A249 welded tubes are for boiler, superheater, heat exchanger, and condenser system, the pressure equipment is used to transfer heat.
ASTM A269 tubing is for general service, usually, it is applied in equipment and instruments, also under low or high-temperature environments, therefore, ASTM A269 tubing is also used for heat transfer equipment.
4.Material&Grades
ASTM A249 and ASTM A269 Specifications indicate tube material is Austenitic Stainless Steel grades, which is wide used in stainless steel families, TP304, TP304L, TP316, TP316L, TP347, TP347H, TP321, TP321H, 904L grade is ideal material for various applications, they have some advantages that other steels do not have.
A249 VS A269 Sizes And Dimensions
Usually, ASTM A249 tubing sizes and wall thickness separately are 1/8 in (3.2 mm) in inside diameter to 12 in (304.8 mm) in outside diameter and 0.015 in. to 0.32 in (0.4 – 8.1 mm). The tubing sizes and thicknesses furnished to ASTM A269 are 1/4 in. (6.4 mm) in inside diameter and larger and 0.020 in. (0.51 mm) in nominal wall-thickness and heavier.
Tube size is stated in inch or millimeter, sometimes, tube gauge (BWG) size is specified.
A249 VS A269 Dimension Tolerances
ASTM A249 welded tube dimensional tolerance is in accordance with ASTM A1016 specification, wall thickness tolerance is +/-10% of thickness, comparing with ASTM A269 tube size tolerance as follows.
| OD | WTH | L | ||
|---|---|---|---|---|
| ASTM A249 | ＜25.40mm | ±0.10mm | ±10.00% | OD＜50.8mm +3.0mm -0mm OD≥50.8mm +5.0 -0mm |
| ≥25.4mm~38.1mm | ±0.15mm | |||
| ≥38.1mm~50.8mm | ±0.20mm | |||
| ≥50.8mm~63.5mm | ±0.25mm | |||
| ≥63.5mm~76.2mm | ±0.30mm | |||
| ≥76.2mm~101.6mm | ±0.38mm | |||
| ≥101.6mm~190.5mm | +0.38mm -0.64mm | |||
| ≥190.5mm~228.6mm | +0.38mm -1.14mm | |||
| ASTM A269 | ＜38.1mm | ±0.13mm | OD＜12.7mm ±15% OD≥12.7mm ±10% |
OD＜38.1mm +3.20mm -0mm OD≥38.1mm +4.80 -0mm |
| ≥38.1mm~88.9mm | ±0.25mm | |||
| ≥88.9mm~139.7mm | ±0.38mm | |||
| ≥139.7mm~203.7mm | ±0.76mm | |||
| ≥203.7mm~304.8mm | ±1.01mm | |||
| ≥304.8mm~355.6mm | ±1.26mm | |||
Dual Certification Standard
Users should distinguish between ASTM A249 and ASTM A269 specifications, although they are typical standards for stainless steel tube technical requirements, they are different.
In some cases, users require stainless steel tubes to conform to dual certified standard A249/A269, which means the tubes should comply with both ASTM A249 and ASTM A269, and get the best value or result specified in the two specifications, the tubes will be high quality.
ASME SA249 is the same standard as ASTM A249 specification, ASME publishes ASME SA-249, but ASME has no equivalent standard with ASTM A269.
Common Sizes of A249/A269 Tubing
| O.D. | MM | WALL THICKNESS | MM | LENGTHS | Grades | Type | SPECIFICATIONS |
|---|---|---|---|---|---|---|---|
| 1/2" | 12.70 | 0.065" | 1.65 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 3/4" | 19.05 | 0.065" | 1.65 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 1" | 25.4 | 0.049" | 1.24 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 1" | 25.4 | 0.065" | 1.65 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 11/2" | 38.10 | 0.049" | 1.24 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 11/2" | 38.10 | 0.065" | 1.65 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 2" | 50.80 | 0.049" | 1.24 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 2" | 50.80 | 0.065" | 1.65 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 21/2" | 63.50 | 0.065" | 1.65 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 3" | 76.20 | 0.065" | 1.65 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 4" | 101.60 | 0.065" | 1.65 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 4" | 101.60 | 0.083" | 2.11 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 6" | 152.40 | 0.083" | 2.11 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 6" | 152.40 | 0.109" | 2.77 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 8" | 203.20 | 0.109" | 2.77 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 10" | 254.00 | 0.134" | 3.40 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 12" | 304.80 | 0.134" | 3.40 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
| 14" | 355.60 | 0.134" | 3.40 | 10′ – 20′ | 304/304L/316L | Welded | A249 / A269 / A270 |
What is the test for ASTM A269?
Tubing shall be subjected to either hydrostatic test or nondestructive electric test to test for leaks or defects. Welded tubes have to resist flanging without cracking demonstrating weld integrity.
