초록 ▼

An apparatus for coating the internal surfaces of pipes comprises two pigs which engage against the internal pipe surfaces and are movable through the pipe, and which define an intermediate zone therebetween for receiving the coating material. A spraying device capable of spraying material in the ra

An apparatus for coating the internal surfaces of pipes comprises two pigs which engage against the internal pipe surfaces and are movable through the pipe, and which define an intermediate zone therebetween for receiving the coating material. A spraying device capable of spraying material in the radial direction is connected to the intermediate zone via a material feed line. Upon being drawn through the pipe, the coating material is fed to the spraying device which atomizes the material and conveys it to the internal surfaces of the pipe.

대표청구항 ▼

Apparatus for internally coating pipes comprising a first and a second pig which engage the internal surface of the pipe and are moveable through the pipe to form a primer layer on the internal pipe surface, an intermediate zone between the two pigs for receiving coating material, said coating mater

Apparatus for internally coating pipes comprising a first and a second pig which engage the internal surface of the pipe and are moveable through the pipe to form a primer layer on the internal pipe surface, an intermediate zone between the two pigs for receiving coating material, said coating material being pressurized when moving the pigs to drive said coating material from the intermediate zone through a material feedline to a spray device structurally attached to the second pig, said spraying device spraying coating material received from the intermediate zone onto the primer layer formed by the pigs.