| CPC F16L 9/127 (2013.01) [B29C 48/0018 (2019.02); B29C 48/09 (2019.02); B29C 48/131 (2019.02); B29C 48/151 (2019.02); B29C 48/2883 (2019.02); B29C 48/2886 (2019.02); B29C 63/0004 (2013.01); F16L 9/06 (2013.01); F16L 9/105 (2013.01); F16L 9/128 (2013.01); F16L 11/115 (2013.01); F16L 58/1063 (2013.01); B29C 48/001 (2019.02); B29K 2309/08 (2013.01); F16L 9/02 (2013.01); F16L 9/085 (2013.01); F16L 9/12 (2013.01); F16L 58/02 (2013.01)] | 18 Claims |

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1. A pipe, comprising:
an axially extended bore defined by a corrugated outer wall having axially adjacent, outwardly-extending corrugation crests connected by corrugation valleys, the corrugation crests and valleys forming a continuous cross-section;
an outer wrap applied to the corrugated outer wall, the outer wrap spanning the corrugation crests producing a smooth outer surface;
wherein the corrugated outer wall comprises high density polyethylene (HDPE),
wherein the outer wrap comprises polypropylene (PP), and
wherein the outer wrap is secured to the corrugated outer wall by a tension of the outer wrap.
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