Automatic Control of the Technological Regime in Devices with Enamel-Coated Inner Surface of Pipes

The experimental investigations performed in this work and practice have shown that the main defects significantly reducing the service life of enamel-coated pipes are the roughness of the inner surface of a pipe and the presence of small bubbles and layers of macro- and microcracks. The problem of the occurrence of defects in the enamel coating that destroy the integrity of the enamel is considered in this article. The causes of these defects are associated with an incorrect choice of the technological regime when applying an enamel coating to the inner surface of the pipes. The choice of the technological regime on application of a coating depends on the geometric dimensions and technological parameters of the pipes.

It is known that imprecise implementation of the technology for applying enamel coatings to the inner surface of pipes effects the formation of microcracks. Taking this into account, the main objectives of this work are to automatically adjust the parameters of the technological regime of the device and to adjust the control system so as to prevent the formation of microcracks during coating application and to improve the automatic regulation of the process.