Plascoat PPA 571 for the coating of ductile iron pipe

Citation

(2003), "Plascoat PPA 571 for the coating of ductile iron pipe", Anti-Corrosion Methods and Materials, Vol. 50 No. 3. https://doi.org/10.1108/acmm.2003.12850cad.004

Plascoat PPA 571 for the coating of ductile iron pipe

Plascoat PPA 571 for the coating of ductile iron pipe

Keywords: Coatings, Pipes, Iron

The Gothenburg Water and Sewage works serves about 450,000 inhabitants and industries. Water is taken from the Göta river and after treatment in two plants, distributed in a network, 1,750 m in length.

Traditionally, cast iron pipes have been used but in 1970 ductile iron pipes were introduced. The soil consists of either rock or glacial clay with a high salt content. Corrosion is a well-known phenomenon and many old pipes have been exchanged over the years, but still there are a considerable number of pipes from the last century in service.

Typically, there have been 300-400 failures with these pipes on the main network every year.

In 1986, however, new pipes were coated in thermoplastics and in the last few years in Plascoat PPA 571. Since this change 80 km of pipe has been installed and so far there has been no instance of failure or corrosion with these pipes.

As a result of this experience, and of controlled tests by the Swedish Corrosion Institute, Plascoat PPA 571 is now being increasingly used for the coating of ductile iron pipes, fittings and hydrants around the world – including the USA (Seattle).