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ASTM A672 N75 LSAW pipeline specification

ASTM A672 N75 is a specification for electric fusion welded (EFW) steel pipe used for high-pressure service at moderate temperatures. It is commonly used for conveying fluids in industries such as oil and gas, petrochemical, and power generation.

Here are some key specifications of ASTM A672 N75 LSAW (Longitudinal Submerged Arc Welded) pipeline:

Size Range: The outer diameter of ASTM A672 N75 LSAW pipes typically ranges from 18 inches to 72 inches (457mm to 1829mm). The wall thickness can vary based on specific requirements and project needs.

Grade: ASTM A672 N75 is a carbon steel grade that has a minimum yield strength of 65,000 psi (450 MPa). The "N75" designation refers to its nominal yield strength.

Manufacturing Process: ASTM A672 N75 LSAW pipes are produced through the process of longitudinal submerged arc welding. In this process, a flat steel plate is formed into a cylindrical shape and welded longitudinally using submerged arc welding techniques. The welding is performed under a layer of granular flux to protect the weld from atmospheric contamination.

Chemical Composition: The chemical composition of ASTM A672 N75 includes elements such as carbon (C), manganese (Mn), phosphorus (P), sulfur (S), silicon (Si), nickel (Ni), chromium (Cr), and other trace elements. The exact composition may vary depending on the specific product specification and manufacturing practices.

Testing and Inspection: ASTM A672 N75 LSAW pipes undergo various tests and inspections to ensure compliance with the specified requirements. These may include visual inspection, dimensional checks, tensile testing, impact testing, non-destructive testing (such as ultrasonic examination or radiographic inspection), and other quality control measures.

It's important to note that the information provided here is a general overview, and for specific details and requirements, it is recommended to refer to the latest edition of the ASTM A672 standard or consult with the manufacturer or supplier of the steel pipes.