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Application filed by Pipeform L L CfiledCriticalPipeform L L C
Priority claimed from PCT/US1995/006408external-prioritypatent/WO1995033947A1/en
Publication of MXPA96006197ApublicationCriticalpatent/MXPA96006197A/en
Publication of MX9606197ApublicationCriticalpatent/MX9606197A/en
A composite concrete pipe (10) in which both the inner (12) and outer (14) surfaces are plastic. The pipe may be formed of any diameter by forming the inner and outer plastic surfaces from helically wrapped interlocking plastic strips to form the diameters desired.