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.

Stainless steel flange is a ring-shaped component used for pipeline connections, usually made of stainless steel material. Large diameter stainless steel flanges specifically refer to flange products with larger diameters, which play an important role in the industrial field.

Seamless steel pipes with small outer diameters are called small-diameter seamless steel pipes. Small-diameter seamless steel pipes can be further divided into: seamless small-diameter steel pipes and straight-seam (also called welded) small-diameter seamless steel pipes.

Pipe spool fabrication and installation are essential processes in modern engineering projects, particularly in industrial facilities where accuracy, reliability, and safety are crucial.