Abstract: A conduit pipe for conveying media, having a core pipe made of a copper alloy and a jacketing made of a plastic material from the group of the polyolefins having functional groups. The ratio between the thickness of the jacketing wall and the thickness of the core pipe wall ranges between 2:1 and 14:1, while the ratio between the thickness (D) of the core pipe wall and its inside diameter (ID) ranges between 0.01 and 0.05.

Abstract: A permanent chill mold for the continuous casting of metals, comprising a mold tube (1) placed in a water box, a water gap being formed between the inner side of the wall of the water box and the outer side (2) of the mold tube (1). In the water gap, at least one sheet metal water deflector (3) is situated, the mold tube (1) being supported at least in one direction to be laterally freely shiftable with respect to the water box and the working position of the mold tube (1) being adjusted by the flow relationships in the water gap.

Abstract: A cooling plate (1) made of copper or a copper alloy for blast furnaces has a plurality of bore holes (6) for accommodating a cooling medium. The bore holes (6) are connected to a cooling medium intake (12) and a cooling medium outlet via connecting pipes (9) that are welded onto the cold side of the plate (5). Connecting pipes (9), at their plate ends (14), are furnished with flanges (15) that are formed by being flanged open. These flanges (15) are set into recesses (17) in the cold side of the plate (5), and are welded at their circumference by V seams (19) to the cold side of the plate (5).

Abstract: A chill tube (1) having a double T-shaped inner and outer cross section in beam blank format is encased in a water-guiding jacket (12) adapted to its outer contour while forming a water gap (14). The wall thickness (D) of chill tube (1) in the rounded transition regions (2) from middle crosspieces (4), which face each other head to head and are drawn in towards longitudinal axis (3), to the neighboring crosswise positioned flanges (5) is dimensioned at least partially smaller than in the remaining wall sections (6, 7). The reduction in wall thickness is implemented by longitudinal hollow recesses (8). These recesses (8) extend only in the height range of the bath level. Into the cross sectional regions which are formed by the outer contour of chill tube (1) as well as the inner contour of water-guiding jacket (12), filler pieces (17) are incorporated, adapted to this cross section.

Abstract: A copper installation pipe having a tin coating that is applied with temperature control so as to be adherent over the entire inner surface. The thickness of the intermetallic phase formed at the transition from the copper pipe to the tin coating is less than 20%, preferably less than 5% of the overall coating thickness. In addition, a method for coating an installation pipe using chemical treatment, where the temperature of the tinning solution is selectively varied. To ensure the smallest possible intermetallic phase at the copper surface, one begins the tinning process at a low temperature. This promotes the formation of a large number of uniformly distributed nuclei of crystallization having the same orientation. The temperature is then selectively adjusted to promote crystal growth, the result being that the crystals grow rapidly with the orientation remaining constant. One then achieves a dense tin coating having a minimal exposed surface area.

Abstract: The invention concerns a mold for a continuous casting system with a shaping mold tube made of a material with high thermal conductivity. To reduce the rate of heat removal at the height of the meniscus that forms within the mold cavity, the exterior of the mold tube is provided with a plating of a material of lower thermal conductivity than that of the mold tube. This results in reduced heat flow with higher temperatures in the meniscus area and in improvement in the surface quality of the cast billet.

Abstract: An ingot mold for the continuous casting of metals. The mold has a mold cavity that is open at opposing ends. The cross-sectional area at the casting pour-in-side is larger than the cross-sectional area of the end from which the billet emerges. To achieve higher casting performance and attain better billet quality via more uniform temperature distribution over the casting cross-section, the mold cavity has multiple conical depressions on an outer cooling surface. These depressions, which are arrayed over at least one area, constitute a region defining elevated heat transfer coefficients. The cooling-side surface in the bath level area of the ingot mold has a roughened structure over part of its surface, the roughened structure tapering in the casting direction.

Abstract: A passthrough method is provided in which the surface of an industrial grade, low-grease precursor made of copper, with a defined surface roughness, is patinated. For this purpose the precursor material, connected as the anode, is passed through an electrolysis bath, containing sodium carbonate and/or sodium hydrogencarbonate as well as sodium sulfite and/or sodium disulfite, with a temperature of 30.degree. C. to 90.degree. C. and a current density of 1 A/dm.sup.2 to 20 A/dm.sup.2 as bath parameters, for a residence time of 10 seconds to 12 minutes. The precursor material is rinsed and then moved through a fixing bath at a temperature of 35.degree. C. to 95.degree. C. for a residence time of 10 seconds to 120 seconds, and lastly, after a further rinsing, is dried. The fixing bath contains at least one of the oxidation agents: hydrogen peroxide (H.sub.2 O.sub.2), potassium chlorate (KClO.sub.3), potassium peroxodisulfate (K.sub.2 S.sub.2 O.sub.8), potassium permanganate (KMnO.sub.4), of copper sulfate (CuSO.

Abstract: A heat exchanger tube having a smooth outer surface and a textured inner surface. The inner surface is composed of parallel ribs which run at an angle deviating from 90.degree. relative to the longitudinal axis of the exchanger tube. The ribs further have inclined flanks, channels delimited on the sides by the ribs, and depressions formed in the ribs, which may run crosswise at a distance from the bottom of the channels. The depressions are formed so as to follow a sine-shaped progression, in longitudinal cross-section of the ribs, which are provided with a surface micro-roughness and which are rounded on the top. The center longitudinal planes of the depressions are arranged at an angle deviating from 90.degree. relative to the longitudinal axis of the exchanger tube. The opposite flanks of adjacent ribs are connected by means of rounded channel bottoms. The micro-roughness of the rib surfaces is produced by corundum blasting or laser beams.

Abstract: A method for manufacturing a tin-coated surface of rolled copper strips or copper-alloy strips, wherein a strip surface is mechanically treated using a textured working roll to adjust a texture on said strip surface of an average peak-to-valley height within the range of 3 to 12 .mu.m and the textured strip surface is then continuously coated with tin or a tin-base alloy.