Polyethylene encasement is the easiest, most economical and most effective method of corrosion
protection for Ductile Iron pipe and fittings installed in aggressive soils. It is simply a tube or
sheet of polyethylene film that is slipped over or wrapped around the exterior of the pipe and/or
fitting at the job site prior to installation.
Since its initial testing in 1951, polyethylene encasement has been installed and used successfully on thousands of miles of gray and Ductile Iron pipe throughout the United States. This has
led to the development of an international standard (ISO 8180) and numerous national standards
(United States, ANSI/AWWA C105/A21.5 and ASTM A674; Great Britain, BS 6076; France, AFNOR
NFA 48-851; Republic of Germany, DIN 30674, part 5; and Japan, JDPA Z 2005). All of these
specify material requirements and recommended installation procedures. Complete step-by-step
illustrated installation instructions are available through your U.S. Pipe sales representative