API SPEC 5CT is a technical specification standard for oilfield casing published by the American Petroleum Institute (API), primarily used in the oil and gas extraction industry. This standard specifies the steel grade system, chemical composition, mechanical properties, dimensional tolerances, and other technical indicators for casing and tubing.

ASTM A36 is the American standard for carbon structural steel plates, with the standard being ASTM A36/A36M-03a. This standard applies to riveted, bolted, and welded structures for bridges and buildings, as well as carbon steel sections, plates, and bars of general-purpose structural steel quality.

ASTM A513 carbon steel mechanical tubing is a versatile, high‑performance steel tubing solution widely used in commercial, industrial, and consumer applications.

Steel sheet pile are steel structures with interlocking devices on their edges, which can be freely combined to form a continuous and compact retaining or water-retaining wall. Cold-formed sheet piles are steel structures formed by continuous roll forming in a cold-bending unit, with continuous overlapping of the side interlocking joints to form a sheet pile wall.

Carbon steel plate (also known as carbon steel sheet/plate) refers to a type of steel primarily composed of steel and carbon, with a carbon content at ordinary or medium-to-high levels, and without the intentional addition of large amounts of alloying elements.

The Role of OCTG Drill Pipe in Oil and Gas Drilling