To enhance the corrosion resistance of steel pipes, they are typically galvanized. There are two main types of galvanized steel pipes: hot-dip galvanizing and electro-galvanizing. Hot-dip galvanizing creates a thicker zinc coating, offering better protection against rust, while electro-galvanizing is more cost-effective but results in a less smooth surface. Another type is the oxygen-blowing welded pipe, commonly used for oxygen delivery systems. These pipes usually have a small diameter, ranging from 8/8 to 2 inches, and are made from steel strips such as 08, 10, 15, 20, or Q235. To prevent corrosion, some of these pipes are coated with aluminum.
Many older buildings were constructed using galvanized pipes, and even today, gas and heating systems often rely on them. However, when used as water supply pipes, galvanized steel can lead to serious issues over time. After years of use, rust accumulates inside the pipes, causing discolored, yellow water that can damage fixtures and harbor harmful bacteria. The buildup of rust also increases the concentration of heavy metals in the water, posing a significant health risk. In the 1960s and 1970s, many developed countries began phasing out galvanized pipes in favor of newer materials. In 2000, China's Ministry of Construction and other government agencies issued a directive banning the use of galvanized pipes in new residential areas. Today, galvanized pipes are rarely used for cold water systems, though some regions still use them for hot water piping.
Pipe Fitting,Butt Welding Tee,Butt Welding Crosses,Stub Ends
ZHITONG PIPE VALVE TECHNOLOGY CO.,LTD , https://www.ztongvalve.com