A delivery pipe for transport of solids, having a double-walled pipe body having an inner pipe and a metallic outer pipe and at least one pipe collar arranged on an end. The delivery pipe is distinguished in that the inner pipe is made of a solid plastic material and a wear ring is inserted in the pipe collar, the inner diameter of which ring is less than or equal to the inner diameter of the inner pipe.

In a sectional-type high wear-resistant double-layer straight tube and a method for preparing the same, the double-layer straight tube includes a protective outer tube and a sectional-type wear-resistant inner tube. The protective outer tube is nested outside of the sectional-type wear-resistant inner tube; the sectional-type wear-resistant inner tube includes at least two wear-resistant inner tube sections; and the wear-resistant inner tube sections are connected sequentially. The sectional-type wear-resistant inner tube at least includes a left inner tube section, a right inner tube section, and one or more middle inner tube section. The wear-resistant straight tube can greatly prolong the service life of the pipeline so that the cost performance of the pipeline is increased by more than a few times. It would also easily achieve mass production, the quality is stable and reliable, and the safety performance is high.

A method to make a tubular element to transfer abrasive materials such as concrete, inert materials or suchlike, where the tubular element includes an external tubular component made of steel and an internal tubular component, coaxial to the external tubular component, where the internal tubular component is made of chromium carbide, or other similar material resistant to wear.

An internal inclined sub-channel, or ramp device, for suspending and/or re-suspending solids within a pipeline system during transport of slurry may be provided to various components of the slurry transport system to control or reduce localized and severe wear that often occurs in slurry pumps. Embodiments of the ramp device may be adequately configured to alter slurry multiphase flow patterns and/or disrupt traditional moving/sliding bed regime phenomena. Embodiments of the ramp device may be adequately configured to raise coarse abrasive particulates from bottom portions of a slurry pipe sectionwhere a higher concentration and/or a larger presence of coarser particles may be present. Embodiments of the ramp device may be installed in proximity of and/or upstream of slurry pumps to prevent occurrences of severe localized wear at the inner diameter of the pump suction side wall around the bottom or 6 o'clock position.

An object of the present invention is to provide a technique in which deposition of powder during pneumatic transport can be inhibited by a pipe body having a simple structure. The present invention is a pipe for transporting powder including a transport path which has a portion formed by a curved pipe and through which pneumatically transported powder passes, and a blowing path through which a gas is blown into the transport path from an opening formed on an inner circumferential surface of the curved pipe, in which the blowing path blows the gas in a direction in which the gas blown into the transport path from the opening forms a swirling flow along the inner circumferential surface of the curved pipe.

An object of the present invention is to provide a technique in which deposition of powder during pneumatic transport can be inhibited by a pipe body having a simple structure. The present invention is a pipe for transporting powder including a transport path which has a portion formed by a curved pipe and through which pneumatically transported powder passes, and a blowing path through which a gas is blown into the transport path from an opening formed on an inner circumferential surface of the curved pipe, in which the blowing path blows the gas in a direction in which the gas blown into the transport path from the opening forms a swirling flow along the inner circumferential surface of the curved pipe.

A method and apparatus for producing a curved tubular segment includes obtaining a curved external tubular element and a curved internal tubular element. The curved internal tubular element is made of a material having a resistance to wear greater than that of the curved external tubular element and has a cross section such as to cover at least part of the internal surface of the curved external tubular element. The curved internal tubular element is inserted inside the curved external tubular element after heating the latter by a heating unit. To form the curved external tubular element on the exact geometry of the curved internal tubular element, a molding unit and a cooling unit are used to obtain a curved tubular segment without spaces between the curved external tubular element and the curved internal tubular element.

A modular hopper tee including a modified tee box, a tee box liner, a readily detachable inflow adapter for coupling a first pipe to the tee box and a readily detachable outflow adapter for coupling a second pipe to the tee box, the liner and adapters being constructed from an elastomeric polymer such as polyurethane. Each of the inflow and outflow adapters includes a flange portion and a cylinder portion extending through the flange portion, the flange portion dividing the cylinder portion into a first cylinder portion that extends through a sidewall opening of the tee box and sealingly engages the liner and a second cylinder portion that is located outside of the box. A metal cylinder member, which is embedded within the first cylinder portion and surrounds an exterior of the second cylinder portion, is provided for reinforcing the adapter.

A modular hopper tee including a modified tee box, a tee box liner, a readily detachable inflow adapter for coupling a first pipe to the tee box and a readily detachable outflow adapter for coupling a second pipe to the tee box, the liner and adapters being constructed from an elastomeric polymer such as polyurethane. Each of the inflow and outflow adapters includes a flange portion and a cylinder portion extending through the flange portion, the flange portion dividing the cylinder portion into a first cylinder portion that extends through a sidewall opening of the tee box and sealingly engages the liner and a second cylinder portion that is located outside of the box. A metal cylinder member, which is embedded within the first cylinder portion and surrounds an exterior of the second cylinder portion, is provided for reinforcing the adapter.

A method to manufacture a tubular element for transferring abrasive materials such as concrete, inert materials or suchlike, wherein the tubular element comprises an internal tubular component made of chromium carbide or other wear-resistant material, and an internal tubular component in contact with and coaxial to the internal tubular component and made of composite material.