ASTM A672 B65 is a specification for electric fusion welded steel pipes designed for high-pressure service at moderate temperatures. These pipes are commonly used in various industrial applications where resistance to stress and corrosion is crucial. The "B65" grade indicates the specific mechanical properties and chemical composition requirements for this type of pipe. Grade B65: The "B65" grade designates the minimum yield strength of the pipe, which is typically 65,000 psi (450 MPa). This grade ensures that the pipe can withstand the mechanical stresses associated with high-pressure applications. Manufacturing Process: ASTM A672 B65 pipes are manufactured using the electric fusion welding process. This method involves the fusion of the pipe's edges using an electric arc, resulting in a strong and durable welded seam. The pipes can be produced in various sizes ranging from NPS 1/2" to 24" and with different wall thicknesses to meet specific project requirements. Chemical Composition: The typical chemical composition of ASTM A672 B65 includes carbon (C) content up to 0.24%, manganese (Mn) between 0.79% and 1.30%, phosphorus (P) not exceeding 0.025%, sulfur (S) limited to 0.025%, and silicon (Si) up to 0.55%. These elements are carefully controlled to ensure the desired properties of strength, ductility, and corrosion resistance
Coating and Surface Finish: These pipes are available with either a black finish or hot-dip galvanized coating to protect against corrosion and environmental factors. The choice of coating depends on the intended application. Heat Treatment: Pipes may undergo heat treatment processes such as normalization or quenching and tempering, depending on the project's requirements. Heat treatment can enhance the mechanical properties of the pipe. Testing: ASTM A672 B65 pipes undergo rigorous testing, including hydrostatic testing at pressures specified in the ASTM standard to ensure they can withstand the intended service conditions. Non-destructive tests, such as eddy current testing or ultrasonic examination, are also conducted to detect potential defects. Ends and Lengths: These pipes are available with different end types, including plain ends, beveled ends, threaded ends, or as per customer requirements. Lengths can be single random (typically 17' - 24') or double random (typically 36' - 44') or customized to suit project needs..
Specification | ASTM A672 |
Grade | B65 |
Type | Electric Fusion Welded |
Size Range | NPS 1/2" - 24" |
Wall Thickness | SCH 10, SCH 20, SCH 30, SCH 40, SCH STD, SCH 80, SCH XS, SCH 160, SCH XXS, or as per customer requirements |
Length | Single Random (17' - 24'), Double Random (36' - 44'), or as per customer requirements |
Ends | Plain End, Beveled End, Threaded, or as per customer requirements |
Coating | Black or Hot-Dip Galvanized |
Heat Treatment | Normalized or Quenched and Tempered, if required |
Hydrostatic Test | Performed at pressures specified in the ASTM standard |
Non-destructive Test | Eddy Current Test or Ultrasonic Examination |
Tolerances | As per ASTM A672 standard |
Certification | Mill Test Certificate, Third-Party Inspection, or as per customer requirements |
Tolerances: Tolerances for dimensions and wall thickness conform to the ASTM A672 standard, ensuring the pipes meet the required specifications. Certification: ASTM A672 B65 pipes are accompanied by mill test certificates to provide assurance of their quality and compliance with the standard. Third-party inspection may also be performed as per customer requirements. In summary, ASTM A672 B65 Carbon Steel EFW Pipes are designed for high-pressure applications and are manufactured to meet strict standards for mechanical properties, chemical composition, and quality control. These pipes are suitable for various industrial sectors, including oil and gas, petrochemical, and power generation. It is essential to consult the latest ASTM standard and work closely with manufacturers or suppliers to ensure the pipes meet the specific requirements of your project
Element | Composition (%) |
Carbon (C) | 0.24 max |
Manganese (Mn) | 0.79 - 1.30 |
Phosphorus (P) | 0.025 max |
Sulfur (S) | 0.025 max |
Silicon (Si) | 0.55 max |
Property | Value |
Tensile Strength (MPa) | Typically 415 - 550 |
Yield Strength (MPa) | Typically 240 - 310 |
Elongation (%) | Typically 20% min |
Hardness (Brinell) | Typically 143 - 207 |
Impact Test Temperature | -50°C (-58°F) |
Impact Test Energy (Joules) | Typically 27J min |
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