ASTM A199/A199M seamless alloy pipe is a seamless alloy steel pipe used in heat exchangers, condensers and similar heat transfer equipment.
It complies with ASTM A199/A199M standards, has excellent high temperature performance, mechanical properties and corrosion resistance, and can withstand high temperature and high pressure working environments to ensure the normal operation of the heat exchanger. This steel pipe is typically offered in sizes from 1/2 to 3 inches (3.2 to 76.2 mm) outside diameter, but other sizes are available as long as these dimensions comply with all other requirements of the specification.
Tolerance of ASME SA199 Tube
|
Outside Diamter, mm |
Tolerance, % |
|---|---|
|
3.2≤OD＜38.1 |
+20/-0 |
|
38.1≤OD≤76.2 |
+22/-0 |
Outside Diameter Tolerance of A199 T11 Tubing
|
OD |
Permissible Variations In. (mm) | |
|---|---|---|
| Over (+) |
Under (-) |
|
|
Under 1 (25.4) |
0.004 (0.1) | 0.004 (0.1) |
|
1 to 1 ½ (25.4 to 38.1), Incl |
0.006 (0.15) | 0.006 (0.15) |
|
Over 11⁄2 to 2 [38.1 to 50.8], Excl |
0.008 (0.2) | 0.008 (0.2) |
| 2 to 21⁄2 [50.8 to 63.5], Excl | 0.010 (0.25) |
0.010 (0.25) |
| 21⁄2 to 3 [63.5 to 76.2], Excl | 0.012 (0.3) |
0.012 (0.3) |
ASTM A199 Alloy Large Diameter Tube Length Tolerance
| Cold-Finished Seamless Tubes | ||
|---|---|---|
| OD, In.(mm) |
Cut Length, in.(mm) | |
| Over(+) | Under(-) | |
| All Sizes | 3⁄16 [5] | 0 [0] |
| Under 2 [50.8] | 1⁄8 [3] | 0 [0] |
| 2 [50.8] and over | 3⁄16 [5] | 0 [0] |
| Under 2 [50.8] | 1⁄8 [3] | 0 [0] |
| 2 [50.8] and over | 3⁄16 [5] | 0 [0] |
