Abstract: A method for cladding a corrosion resistant high alloy material on surfaces of crossed cavities in a vessel of a high strength metallic material forming a valve casing or the like, the method including the steps of prefabricating first and second cladding structures of generally tubular shapes conforming with the crossed cavities from a thin sheet of a high alloy material; providing grooves on the surfaces of the crossed cavities for receiving corner members of a high alloy material to be located at joined corners of the first and second cladding structures at the intersection of the crossed cavities and end members of a high alloy material to be fitted on end portions of the cladding structures; assembling the first and second cladding structures, corner members and end rings into the crossed cavities; sealing the contacting surfaces of the assembled parts by welding the end members to the vessel and cladding structures; coalescing the assembled parts and the vessel by applying a high pressure to the claddin

Abstract: A pressure reduction apparatus for solid particle-containing high pressure liquids is described. The apparatus includes a gas and liquid pressure reduction tower having a gas phase zone and a liquid phase zone, a high pressure gas and liquid separation tower which has a gas phase zone connected to the gas phase zone of said gas and liquid pressure reduction tower through a first line provided with a high pressure gas charge or discharge valve, and a liquid phase zone connected to the liquid phase zone of said gas and liquid pressure reduction tower through a second line having a feed valve for liquid being reduced, and a low pressure gas and liquid separation tower which has a gas phase zone connected to the gas phase zone through a third line having a low pressure gas charge or discharge valve, and a liquid phase zone connected to the liquid phase zone through a fourth line having a valve through which a pressure reduced liquid is discharged.