Seamless steel pipes come in a wide variety of specifications, typically indicated by outer diameter, wall thickness, and length. The manufacturing processes include cold rolling and hot rolling, with cold-rolled pipes having a maximum nominal diameter of 200 mm, while hot-rolled pipes can reach up to 600 mm. Wall thickness ranges from very thin to relatively thick, and different standards and applications correspond to various specifications, requiring comprehensive consideration of multiple factors when selecting.

PE100 is a classification designation for polyethylene pipe materials, indicating that the pipe is made from the highest grade of high-density polyethylene (HDPE) raw material.

Solution annealing is a metal heat treatment process. Its main purpose is to change the internal structure of the metal through heating and rapid cooling, in order to optimize the material properties. For stainless steel pipes, this process is particularly important.

Hardness: It is a performance indicator used to measure the softness or hardness of a material. There are numerous methods for conducting hardness tests, and the principles vary as well. The hardness values obtained and their meanings are not exactly the same.

This article provides a detailed introduction to the common methods for testing the hardness of steel and their corresponding tables, including Brinell hardness (HB), Rockwell hardness (HRC), and Vickers hardness (HV), etc. Brinell hardness is suitable for softer materials, Rockwell hardness is suitable for high-hardness materials, and Vickers hardness is suitable for microscopic analysis.

This article provides a detailed introduction to the common specifications of aluminum square tubes, including cross-sectional dimensions, wall thickness, and length parameters. It also categorically lists the commonly used specifications of aluminum square tubes in fields such as construction and industry. At the same time, it explains the applicable scenarios and selection points of different specifications to help users quickly match their needs.