ASTM A192 Seamless Boiler Tubes
Features
- Seamless construction with no weld seam, so pressure is carried evenly around the tube
- Larger diameter and heavier wall range than heat exchanger grade tubes
- Low carbon chemistry that balances strength with good ductility and weldability
- Every tube pressure tested and mechanically checked before dispatch
- Hot finished or cold drawn to suit the required tolerance
- Custom lengths, end finishes, and surface treatments available
Specifications
| Parameter | Specification |
|---|---|
| Standard | ASTM A192 / ASME SA192 |
| Material | Low carbon steel |
| Manufacturing Process | Seamless, hot finished or cold drawn |
| Outside Diameter | 1/2″ to 7″ (12.7 to 177.8 mm) |
| Wall Thickness | 0.085″ to 1.000″ (2.2 to 25.4 mm) |
| Length | 6 m, 12 m, or cut to length |
| Tube Ends | Plain or beveled |
| Surface Finish | Black, oiled, varnished, or galvanized |
| Testing | Hydrostatic or eddy current, flattening, flaring, flange, hardness |
| Typical Use | High-pressure boiler tubes and heat exchangers |
Chemical Composition and Mechanical Properties
| Element | Content (%) |
|---|---|
| Carbon | 0.06 to 0.18 |
| Manganese | 0.27 to 0.63 |
| Phosphorus | 0.035 max |
| Sulfur | 0.035 max |
| Silicon | 0.25 max |
| Property | Value |
|---|---|
| Tensile Strength | 325 MPa (47 ksi) min |
| Yield Strength | 180 MPa (26 ksi) min |
| Elongation | 35% min |
| Hardness | 77 HRB max |
Use Case
- Power plant boilers, water walls, and economizers
- Superheater and reheater sections at moderate temperatures
- Industrial boilers for steam production
- Heat exchangers handling hot fluids under pressure
- Refinery and petrochemical process heating equipment
- Marine boilers