來源：http://www.5iwsg.com/ 日期：2021-12-03 發布人：adminlehao
Spiral steel pipe is a kind of sewage pipe used for conveying domestic and industrial waste water or sewage. Especially in recent years, with the development of new technology and new materials, many new pipes with different characteristics and advantages have been developed and applied to drainage industry with good performance.
The main metal pipes used in drainage engineering are steel pipes, ductile iron pipes and grey cast iron pipes.
The steel pipe has the advantages of high mechanical strength, good pressure resistance, convenient manufacture and use, and is suitable for complex terrain. Like other metal pipes, steel is prone to corrosion, so when used in pipes, they should be lined with an asphalt coating to prevent the erosion of acidic water. This also preserves its good flow characteristics. The disadvantage of various coatings and linings is that they can damage the service life of the coating during installation and are directly affected by the quality of the surface treatment of the steel pipe and the polyethylene combination, so the cost of the steel pipe is very high.
The main advantage of steel is its strength. Cracks usually do not occur, and large diameter steel pipes are the most commonly used pressure piping for sewage and wastewater treatment under abnormal loads. Three methods can be used: seamless, welded, and cast molds.