ASME SA179 Carbon Steel Boiler Tube For Boilers , Petrochemical

ASME SA179 Carbon Steel Boiler Tube is a specification for seamless carbon steel tubes that are specifically used in the manufacturing of heat exchangers, condensers, and boiler systems. These tubes are designed to perform in relatively lower-pressure, moderate-temperature environments compared to higher-grade steels like ASME SA192.

SA179 is a specification under the ASME (American Society of Mechanical Engineers) standards for seamless cold-drawn carbon steel tubes. These tubes are intended for use in heat transfer applications where moderate temperature and pressure conditions prevail.

Chemical Composition:

• Carbon: 0.06–0.15%
• Manganese: 0.27–0.63%
• Phosphorus: ≤ 0.035%
• Sulfur: ≤ 0.035%
• Silicon: 0.10–0.35%

Mechanical Properties:

• Tensile Strength: 45,000–70,000 psi (310–480 MPa).
• Yield Strength: 25,000 psi (172 MPa).
• Elongation: Minimum of 30% in 8 inches (200 mm) of gauge length.
• Hardness: Relatively low, contributing to its good formability and resilience in heat transfer applications.

Key Features:

• Cold-Drawn Seamless Construction: These tubes are manufactured without seams, making them ideal for handling internal pressures without compromising structural integrity.
• Lower Pressure and Temperature Resistance: While still suitable for high-temperature applications, SA179 tubes are generally used in systems with lower pressure and moderate temperature requirements compared to higher-grade boiler tubes (like ASME SA192).

Applications:

• Heat Exchangers: SA179 is commonly used in heat exchangers, where efficient thermal transfer is required in low- to medium-pressure systems.
• Condensers: The tubes are widely used in condenser units in power plants and other industries that involve steam cooling and condensation processes.
• Boilers: While primarily for low-pressure boilers, SA179 tubes are used in various boiler designs, especially in systems with less stringent pressure and temperature requirements than those served by higher-grade materials.
• Steam Generators: Used in steam generation systems where steam is produced at moderate pressures and temperatures, typically found in older plants or smaller systems.
• Water-Filled Systems: Suitable for water-based systems that require tube systems with moderate pressure and temperature conditions.