Carbon steel pipes and black steel pipes are both commonly used types of steel pipes, especially in industrial, construction, and civil piping applications.

ASTM (American Society for Testing and Materials) standards are internationally recognized technical specifications for carbon steel pipes, covering various pressure ratings, temperature ranges, and applications.

Alloy steel pipes are steel pipes made by adding one or more alloying elements to carbon steel as the base material.
The main purpose is to improve the strength, toughness, wear resistance, corrosion resistance, and high-temperature resistance of the steel pipe.

Carbon steel pipes and alloy steel pipes are the two most commonly used types of steel pipes in industrial pipelines, machinery manufacturing, boilers, and petrochemical industries. However, many people are still unclear about their differences, performance, and application scenarios.