THERMALLY INSULATED CORROSION-RESISTANT NON-METALLIC COMPOSITE PIPE WITH TENSION-RESISTANT SHELL INTERNALLY PROVIDED WITH PRESTRESSED EXPANSIVE CEMENT

摘要

Disclosed is a thermally insulated corrosion-resistant non-metallic composite pipe with a tension-resistant shell internally provided with prestressed expansive cement, comprising a corrosion-resistant and pressure-bearing rigid non-metallic liner pipe, a tension-resistant shell pipe and expansive cement. The corrosion-resistant and pressure-bearing rigid non-metallic liner pipe provided with at least two openings is placed inside a tension-resistant shell pipe shaped and sized correspondingly and comprising a pipe wall provided with an injection nozzle for the injection of expansive cement slurry and a corresponding injection nozzle plug. The corrosion-resistant and pressure-bearing rigid non-metallic liner pipe is wrapped in the tension-resistant shell pipe with clearance. The pipe orifice of the corrosion-resistant and pressure-bearing rigid non-metallic liner pipe and the pipe orifice of the tension-resistant shell pipe, as well as a pipe wall of the corrosion-resistant and pressure-bearing rigid non-metallic liner pipe and a pipe wall of the tension-resistant shell pipe, are supported and positioned with respect to each other with symmetrical clearance, and a gap between the two pipe orifices is sealed. The expansive cement slurry is injected into a gap between the tension-resistant shell pipe and the corrosion-resistant and pressure-bearing rigid non-metallic liner pipe, and is shaken to be compact; and the injection nozzle is sealed with the injection nozzle plug thereof. The thermally insulated corrosion-resistant and pressure-bearing rigid non-metallic liner pipe is easy to machine, resistant to corrosion, has a long service life, and is environmentally friendly, sanitary, healthy and low in costs.