Abstract: A coating zinc material for inhibiting pathogenic and saprophitic microorganisms on indoor surfaces of locations of medical and similar facilities.

Abstract: An insulating joint for pipelines comprises two metal tubular parts each having a dilated end portion, the dilated portion of one of the tubular parts being located within the dilated portion of the other tubular part and the dilated portions extending substantially parallel to each other so as to form a gap therebetween, two sleeves composed of an insulating material and forcefully introduced into the gap one after the other in a longitudinal direction so as to form a space therebetween, and a gasket located in the space and forcefully compressed between the two sleeves.

Abstract: An electrically insulated pipe joint comprises first and second metal tubular parts each having a flange at one end. The first and second tubular parts are coupled by a metal coupling sleeve surrounding the flanges and narrowing behind the flanges. A metal ring is located between both flanges, the outer diameter of which is greater than that of both flanges and which has its inner periphery in contact with the coupling sleeve. At both sides of the metal ring an electrically insulating seal ring is disposed. Further, an electrical insulation is disposed between the coupling sleeve and the first and second tubular parts.

Abstract: An electrically insulated joint for metal piping having two receiving elements each having an opposing surface and defining a passage therebetween, at least one of the opposing surfaces having a non-recessed portion and a recessed portion that has an outer diameter smaller than an outer diameter of the non-recessed portion; an insulating ring having an outer diameter and being at least partially disposed against the recessed portion; an elastic sealing ring; and at least one leg disposed against the recessed portion to make the insulating ring impermeable to gas to thereby prevent high pressure build-up. The insulating ring is composed of a metal ring and one leg extending radially from the metal ring so that the insulating ring has an outermost diameter, and insulation material of high compression strength lining the insulated ring entirely. The elastic sealing ring has an inner diameter in a non-compressed state greater than the outermost diameter of the insulating ring.