API 5CT N80 is a grade of steel casing and tubing that conforms to the American Petroleum Institute (API) specification 5CT.

The dimensions of an A500 rectangular tube can vary based on the specific requirements and design standards.

Steel sheet piles or sheet pilings are a common auxiliary construction material and are widely used in construction, water conservancy, shipbuilding and other fields.

Schedule 80 black steel pipe refers to a specific type of steel pipe with a high wall thickness and a black finish.

Black steel pipe refers to a type of steel pipe that has not been galvanized or coated with a protective layer.

L80 casing is a grade of steel casing commonly used in the oil and gas industry for constructing wellbore walls during drilling operations. The "L" in L80 stands for "line pipe," while the number designates the minimum yield strength in thousands of pounds per square inch (ksi).