Internal and external anti-corrosion steel pipes for sewage pipelines are composite anti-corrosion steel pipes made to cope with the corrosive characteristics of sewage, which can effectively improve the service life of pipelines to 20-30 years, and greatly reduce the waste of human, material and financial resources caused by corrosion and replacement of pipelines.

Spiral steel pipes are mostly used for internal and external anti-corrosion steel pipes for sewage pipelines. Because of their complete models, there are generally a large number of stock in stock, and when there is no stock in stock, the production efficiency is extremely high, and more than 100 tons can be produced a day. Then the spiral steel pipe is cheap, which can effectively reduce the engineering cost. When the spiral steel pipe is used as a sewage pipe, the inner and outer walls need to be sandblasted. Can be used for a long time.

Internal and external anti-corrosion steel pipes for sewage pipelines will formulate different anti-corrosion schemes according to the characteristics of sewage. Some are used for internal and external epoxy coal tar tar anti-corrosion, some are plastic-coated internal and external anti-corrosion, some are lined with polyethylene anti-corrosion, and some will be used for internal anti-corrosion. Lined with PTFE anti-corrosion.