circumference and heat welded or taped closed inner layer 11 can be factory installed on the steel pipe 10 or installed in the field a second protective layer of the containment system is sleeve 12 sleeve 12 is a protective wrap of linear hdpe for example of 2 5 mm thickness positioned over the inner geotextile layer 11 and pipe 10 creating an interstitial space 26 which protects the pipe 10 from corrosion by soil chemistry biological attack and stray electrical currents each sheet of hdpe forming the sleeve 12 encircles the inner layer 11 and pipe 10 with an overlap of about one quarter the circumference and is sealed with a commercially available hdpe weld each sheet of hdpe forming the sleeve 12 is also welded to an adjacent sheet of hdpe thereby forming an impermeable secondary containment system for the pipeline sleeve 12 can be factory installed on the pipe segments s 39 and s 34 or installed in the field factory manufactured pipes made in accordance with this invention are preferably placed in a trench so that the double thickness of the sleeve 12 is at the bottom with non factory manufactured pipes made in accordance with this invention the sleeve 12 is wrapped around the steel pipe 10 and inner.