Apparatus for internally coating pipes

Apparatus for internally coating pipes having a first and a second pig which engage the internal pipe surfaces and are movable through the pipe, having an intermediate zone between the two pigs for receiving coating material, whereupon during the movement the material between the pigs is pressurized and the coating material is forced out of the intermediate zone onto the internal surfaces of the pipe, characterized in that a spraying device which is movable through the pipe is located behind the second pig and is connected to the intermediate zone between the pigs via a material feed line extending through the second pig where said spraying device sprays coating material from the intermediate zone.

Apparatus for internally coating pipes having a first and a second pig which engage the internal pipe surfaces and are movable through the pipe, having an intermediate zone between the two pigs for receiving coating material, where movement is induced by a pull cord is fixed to the second pig and sealingly extends through the first pig via sealing bushings and is connected to a cord winch at one of the pipe for movement of the pigs;

• during movement, the material between the pigs is pressurized and the coating material is forced out of the intermediate zone onto the internal surfaces of the pipe, characterized in that a spraying device which is movable through the pipe is connected to the intermediate zone between the pigs via a material feed line and sprays coating material from the intermediate zone.

Apparatus for internally coating pipes having a first and a second pig which engage the internal pipe surface and are movable through the pipe, having an intermediate zone between the two pigs for receiving coating material, whereupon during the movement the material between the pigs is pressurized and the coating material is forced out of the intermediate zone onto the internal surfaces of the pipe, characterized in that a spraying device which is movable through the pipe is connected to the intermediate zone between the pigs via a material feed line, said spraying device comprising a rotary nozzle which is rotatably driven by means of compressed air from the compressed air reservoir.

Apparatus for internally coating pipes having a first and a second pig which engage the internal pipe surfaces and are movable through the pipe, having an intermediate zone between the two pigs for receiving coating material, whereup during the movement the material between the pigs is pressurized and the coating material is forced out of the intermediate zone onto the internal surfaces of the pipe, characterized in that a spraying device which is movable through the pipe is connected to the intermediate zone between the pigs via a material feed line and sprays coating material from the intermediate zone where an electric booster pump is provided which enhances the flow of coating material from the intermediate zone through the material feed line to the nozzle of the spraying device.

Apparatus for internally coating pipes having a first and a second pig which engage the internal pipe surfaces and are movable through the pipe, having an intermediate zone between the two pigs for receiving coating material, whereupon during the movement the material between the pigs is pressurized and the coating material is forced out of the intermediate zone onto the internal surfaces of the pipe, characterized in that a spraying device which is movable through the pipe is connected to the intermediate zone between the pigs via a material feed line, with a metering valve arranged therein, and sprays coating material from the intermediate zone.