A coupling between lead and extension pile segments of a driven piling. The extension segment has a formed end, an opposite driven end and a body extending therebetween. The formed end has an inner diameter equal to an outer diameter of an exposed end of the lead segment and greater than an outer diameter of the extension segment's body. The formed end has an initial length prior to coupling the extension and lead segments; the formed end undergoes secondary end forming when a driving force is applied, such that the formed end has a final length exceeding the initial length after the extension and lead segments are coupled. In some embodiments, the extension segment has an external ring portion positioned upstream of the formed end, and the exposed end of the lead segment is cold extruded into and through the external ring portion of the extension segment.

A pipe processing tool that is configured to deform the end of a pipe so that the circumferential shape of the end of the pipe generally matches the circumferential shape of an adjacent pipe end. Matching the circumferential shapes of the pipe ends is advantageous during a pipe attachment process. The pipe processing tool can include a deformation ring with a plurality of pipe deformation members. Each pipe deformation member faces radially inward and is actuatable in a radial direction toward and away from the center of the deformation ring in order to permit engagement with the pipe. Each pipe deformation member is individually and separately actuatable from the other pipe deformation members so that the circumferential shapes of the pipes can be altered by controlling suitable ones of the pipe deformation members.

A pipe processing tool that is configured to deform the end of a pipe so that the circumferential shape of the end of the pipe generally matches the circumferential shape of an adjacent pipe end. Matching the circumferential shapes of the pipe ends is advantageous during a pipe attachment process. The pipe processing tool can include a deformation ring with a plurality of pipe deformation members. Each pipe deformation member faces radially inward and is actuatable in a radial direction toward and away from the center of the deformation ring in order to permit engagement with the pipe. Each pipe deformation member is individually and separately actuatable from the other pipe deformation members so that the circumferential shapes of the pipes can be altered by controlling suitable ones of the pipe deformation members.

A crimping device includes a housing defining a bore and at least three extendable mechanisms angularly equispaced about the axis of the bore. Each of the extendable mechanisms include: (i) a first elongate arm hingedly connected at or near a first axial end of the first arm to the housing; (ii) a second elongate arm hingedly connected at or near a first axial end of the second arm to the housing, wherein: the first axial ends of the first and second arms are displaceable relative to each other; and the first and second arms are hingedly connected at or near their second axial ends to each other. The crimping device further includes means for equi-displacing the first axial ends of coupled first and second arms relative to each other, thereby to configure the crimping device between: (i) a dilated condition in which the second axial ends of the first and second arms are maximally spaced from the bore axis; and (ii) a contracted condition in which the second axial ends of the first and second arms are minimally spaced from the bore axis.

A radial press comprises a housing having a lateral portion and a supporting disk on the end face. A ring-like structure extends in the housing and can be displaced along a pressing axis. Multiple pressing jaws arranged around the axis are radially movably supported on the supporting disk. The ring-like structure acts upon the jaws with control faces angled relative to the axis and are seated against counter-faces of the jaws. The angle of the control faces changes as they progress in the axial direction, such that, along the maximum path of travel of the ring-like structure, the axial movement of said structure and the radial movement of the jaws produced thereby are at different ratios. The ring-like structure has exchangeable control elements on which control faces are provided. In planes perpendicular to the pressing axis, each control face is seated on a polygon having corners arranged between adjacent jaws.

Method for manufacturing a composite tube having at least one double-layered portion with an annular outer layer of a first alloy and an annular inner layer of a second alloy provides a base component of the second alloy, having a central through-hole and an externally threaded section, provides an outer component of the first alloy, having an internally threaded section configured to engage with the externally threaded section, forms a tubular work piece by mounting the outer component around the base component such that the internally threaded section is in engagement with the externally threaded section, and hot works the work piece so that a metallic bond is formed between the threaded sections while the mechanical interlock is maintained, and so that the work piece is elongated and its outer diameter is reduced, thus forming a composite tube.

Method for manufacturing a composite tube having at least one double-layered portion with an annular outer layer of a first alloy and an annular inner layer of a second alloy provides a base component of the second alloy, having a central through-hole and an externally threaded section, provides an outer component of the first alloy, having an internally threaded section configured to engage with the externally threaded section, forms a tubular work piece by mounting the outer component around the base component such that the internally threaded section is in engagement with the externally threaded section, and hot works the work piece so that a metallic bond is formed between the threaded sections while the mechanical interlock is maintained, and so that the work piece is elongated and its outer diameter is reduced, thus forming a composite tube.

A method for joining members includes: providing a wall surface body which is a die-molded article provided with a hole portion with a draft angle provided from its opposite end portions toward its center portion, a tubular body with a hollow shape, and an elastic body; inserting the tubular body into the hole portion in the wall surface body; inserting the elastic body into the inside of the tubular body; and compressing the elastic body in the direction of an axial line L of the tubular body to expand the elastic body outwardly in the radial direction of the axial line L, thereby deforming and expanding the tubular body to joint the tubular body to the wall surface body by press-fitting.

A method for joining members includes: providing a wall surface body which is a die-molded article provided with a hole portion with a draft angle provided from its opposite end portions toward its center portion, a tubular body with a hollow shape, and an elastic body; inserting the tubular body into the hole portion in the wall surface body; inserting the elastic body into the inside of the tubular body; and compressing the elastic body in the direction of an axial line L of the tubular body to expand the elastic body outwardly in the radial direction of the axial line L, thereby deforming and expanding the tubular body to joint the tubular body to the wall surface body by press-fitting.

An expandable connection is configured such that a metal-to-metal seal is created upon expansion, even under different expansion ratios. The creation of the metal-to-metal seal can rely on a spring-back effect after expansion. A high pressure rating of the metal-to-metal seal that is created can be achieved with an oversized box face thickness. The expandable connection can also be configured to achieve a high tensile efficiency.