Abstract: An expansion compensator for pipelines of the type including a metal casing lined with refractory materials comprising a corrugated sheath and annular distributing members for a coolant supply beneath the corrugated sheath, the distributing members being located at the inner side of the metal casing of the pipeline.

Abstract: The ends of hot-blast air main hangers are connected to a carrying beam through the medium of pre-compressed springs, preferably each of the springs is in the form of a set of disk springs. The precomposition force of these springs is substantially equal to the mass of a section of the hot-blast main supported by the carrying beam. The magnitude of the pre-compressed setting of the springs is several times larger than the maximum displacements of air heater connecting pipes when the air heaters are vertically displaced during their operation.

Abstract: A stove comprises a metal jacket the inner surface of which has a gunite coating with a layer of metal or a heat-resistant synthetic material sprayed on the surface of said coating to form a continuous gastight cover. The gastight cover is superimposed by heat-insulating and refractory layers. The heat-insulating layer immediately adjacent to the gastight cover is made of kaolin wool which protects the cover against mechanical damage.