1. What is the primary application of ASTM SA179 steel pipe?
ASTM SA179 is a specification for seamless cold-drawn low-carbon steel tubes primarily designed for . It is widely used in power plants, petrochemical facilities, refrigeration systems, and industrial process equipment where efficient heat transfer and resistance to moderate pressure/temperature are required.
2. What are the key material properties of ASTM SA179 steel?
ASTM SA179 is made from low-carbon steel (typically C <= 0.15%) with excellent ductility, weldability, and thermal conductivity. Key properties include:
Tensile strength: 330–480 MPa (48–70 ksi)
Yield strength: >= 205 MPa (30 ksi)
Elongation: >= 30% (in 50 mm)
Brinell hardness: <= 121 HBIt exhibits good formability and can be cold-worked or welded using standard techniques.
3. What size range does ASTM SA179 cover?
ASTM SA179 specifies seamless cold-drawn tubes with:
Outside diameter (OD): 12.7 mm (0.5 inch) to 152.4 mm (6 inches)
Wall thickness (WT): 0.89 mm (0.035 inch) to 12.7 mm (0.5 inch)
Length: Typically 3–12 meters (10–40 feet), with custom lengths available upon request.
4. What temperature range is ASTM SA179 suitable for?
ASTM SA179 operates effectively in a temperature range of -29℃ (-20℃F) to 454℃ (850℃F). It maintains structural integrity and heat transfer efficiency within this range, making it ideal for low to moderate temperature heat exchange systems. For higher temperatures (exceeding 454℃), alloy steel tubes (e.g., ASTM SA213) are preferred.
5. How does ASTM SA179 differ from ASTM A179?
ASTM SA179 and ASTM A179 share identical technical requirements (material composition, mechanical properties, dimensions) but differ in :
ASTM SA179: "S" denotes it is approved for (compliant with ASME Boiler & Pressure Vessel Code, Section II, Part A).
ASTM A179: General-purpose low-carbon steel tube for non-pressure applications (e.g., mechanical structures, low-pressure piping).
