In addition to 200 series, 300 series, 400 series and duplex series stainless steel pipes, there are other special types of stainless steel pipes, such as 600 series stainless steel pipes (630) and 900 series stainless steel pipes (904L). These special types of stainless steel pipes are usually used in more extreme environments, such as high temperature, high pressure, high corrosion or special chemical applications.
