ASME SA192 Cold-Finished Seamless Tubes description
ASTM A192 is the "Standard Specification for Seamless Carbon Steel Boiler Tubes for High Pressure Service" established by the American Society for Testing and Materials (ASTM).
Scope of Application:
- Suitable for seamless carbon steel boiler and superheater tubes with minimum wall thickness for high-pressure applications.
- Tubes are typically supplied with outer diameters from 1/2 inch to 7 inches (i.e., 12.7 mm to 177.8 mm) and minimum wall thicknesses from 0.085 inches to 1.000 inches (i.e., 2.2 mm to 25.4 mm). Other sizes are also available, but must meet all other requirements of this standard. However, the mechanical property requirements do not apply to tubes with an inner diameter less than 1/8 inch (3.2 mm) or a thickness less than 0.015 inch (0.4 mm).
ASME SA 192 / ASTM A192 boiler pipes Chemical Composition Chart (%)
|
C |
Si | Mn | P | S | Mo | Cr | V |
|---|---|---|---|---|---|---|---|
| 0.06-0.18 | ≤0.25 | 0.27-0.63 | ≤0.035 | ≤0.035 | / | / |
/ |
ASTM A192 cold drawn seamless steel tubes mechanical tests required
|
Tensile Strength (Mpa) |
Yield
Strength (Mpa) |
Elongation
(%) |
Hardness (HRB) |
|---|---|---|---|
| ≥325 | ≥180 | ≥35 |
≤77 |
comparison table between A192 and A179 seamless steel pipes:
| Comparison Item | A192 | A179 |
|---|---|---|
| Standard Basis | ASTM A192/A192M | ASTM A179/A179M |
| Primary Use | Suitable for high-temperature and high-pressure components in boilers such as superheaters, reheaters, water walls, and economizers, as well as pressure vessels, petrochemical, and other high-pressure equipment and systems. | Mainly used in low-temperature and low-pressure applications such as heat exchangers, condensers, and low-pressure boilers, as well as some fluid conveyance systems where high strength is not specifically required. |
| Material Characteristics | High-quality carbon steel with higher tensile strength and pressure resistance, good creep resistance and heat fatigue resistance, suitable for long-term operation at high temperatures. | Low-carbon steel with relatively lower strength but good cold workability and weldability, suitable for applications where high strength is not required but good processability is needed. |
| Size Specifications | Wide range of outer diameters with relatively larger wall thicknesses to meet the strength requirements in high-pressure environments. | Diverse outer diameter and wall thickness specifications, but typically with thinner walls, suitable for low-pressure or atmospheric environments. |
| Heat Treatment | Usually requires normalizing or tempering to optimize mechanical properties and high-temperature resistance. | May require annealing to eliminate cold working stress and improve processability. |
| Application Fields | High-pressure and high-temperature environments such as power plant boilers, industrial boilers, pressure vessels, petroleum refining, and chemical production. | Low-temperature and low-pressure or atmospheric environments such as heat exchangers, condensers, low-pressure boilers, air conditioning systems, and water supply and drainage systems. |
test and inspection
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