ASTM A192, A179, A178 Carbon Seamless Tubes for High Pressure
1. Product Description: ASTM A192, A179, and A178 Carbon Seamless Tubes are high-pressure steam service tubes designed for use in boiler and superheater applications. These tubes are manufactured from carbon steel and are seamless, ensuring a uniform wall thickness and exceptional resistance to internal pressures. The seamless construction also provides enhanced durability and reliability, making these tubes ideal for critical high-pressure applications.
2. Product Parameters:
| Parameter | Description |
| Grades | ASTM A192, A179, A178 |
| Material | Carbon Steel (Seamless) |
| Standard | ASTM A192, ASTM A179, ASTM A178 |
| Size Range | Various diameters and wall thicknesses as per ASTM standards |
| Length | Standard lengths, customizable upon request |
| Ends | Plain ends, beveled ends, threaded, or socket-weld ends |
| Surface Treatment | As-rolled, annealed, or normalized |
3. Mechanical Properties:
| Property | ASTM A192/A179/A178 Requirement |
| Tensile Strength | ≥415 MPa (60,000 psi) for all grades |
| Yield Strength | ≥240 MPa (35,000 psi) for A192, varies for A179 and A178 based on specific product forms |
| Elongation | ≥20% in 50 mm (2 in) for A192, varies for A179 and A178 based on product forms |
| Hardness | Varies depending on heat treatment and specific grade |
4. Chemical Composition:
| Element | Typical Range (%) for ASTM A192/A179/A178 |
| Carbon | 0.15 - 0.30 |
| Manganese | 0.35 - 0.60 |
| Phosphorus | ≤ 0.025 |
| Sulfur | ≤ 0.025 |
| Silicon | ≤ 0.35 |
5. Product Uses:
- Boiler Tubes: Used in power and industrial boilers for steam generation.
- Superheater Tubes: Employed in superheater sections of steam power plants to raise steam temperature.
- Heat Exchangers: Suitable for use in shell and tube heat exchangers operating under high pressure.
- Pressure Vessels: Utilized in the construction of high-pressure vessels and reactors.
- Refineries: Ideal for high-temperature and high-pressure pipelines in oil refineries.
6. Product Grade Standards:
- ASTM A192: Specifies requirements for seamless carbon steel boiler tubes for high-pressure service.
- ASTM A179: Covers minimum-wall-thickness, seamless cold-drawn low-carbon steel boiler and superheater tubes.
- ASTM A178: Specifies the requirements for electric-resistance-welded (ERW) carbon steel boiler and superheater tubes.
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