According to the characteristics of urban underground sewage pipes, sewage pipes with
spiral steel pipe coating should meet the following basic requirements:
① With a good chemical resistance;
② Good insulation properties and density, to prevent stray current corrosion and electrochemistry;
③ Corrosion resistant bacteria;
④ A certain mechanical strength, handling and buried to prevent the process from mechanical damage;
⑤ Construction is simple, safe, and meet the site construction requirements.
In addition, there are some special places special requirements, such as cold and the like.
