Abstract: The branch piece is for renovating a pipeline and has a main line pipe and at least one branch pipe connected with the main line pipe. The branch piece is elastic and has an inner sheathing, an outer sheathing and, at least on a part of the branch piece, a flexible reinforcement layer disposed between the inner sheathing and the outer sheathing. The branch piece regains its shape after compression.

Abstract: A renovation liner is installed in a pipework. More particularly, an end of the renovation liner is closed by an elastic end piece. The renovation liner is impregnated with a hardening impregnating agent. The renovation liner, together with its end piece, is slipped into a position in the pipework to be renovated. A pressure is provided and maintained in a space formed by the renovation liner and the elastic end piece in order to press the renovation liner against walls of the pipework until the impregnating agent of the renovation liner has hardened in shape. The elastic end piece is removed.

Abstract: A method for preparing a resizing sleeve for lining a joining point in a pipe assembly having pipes of thicker and thinner diameter. The method includes stretching the resizing sleeve in diameter to the size of the thicker pipe in diameter of the pipe assembly, installing an installation hat according to the thicker pipe in diameter of the pipe assembly by airtightly gluing it onto the stretched resizing sleeve, and returning the resizing sleeve to the size of the thinner pipe in diameter of the pipe assembly to be lined. A suitable tool for implementing the method is also disclosed.

Abstract: The safety device is to be installed in a well. The safety device is has a support structure that is arranged to be lowered at least partly into the well and that restricts the movement of the safety device in the horizontal direction. A collar is in connection with the support structure and arranged to be set against the ground to restrict the movement of the safety device in the vertical direction, with a protective structure arranged on the collar to define a safe working area around the well.

Abstract: A device used for cutting a pipe from an inside. The device has a spindle arranged to be rotated. The device further has protrusions fastened to the spindle and arranged to position the device or a part of the device inside the pipe. The protrusions have at least one blade arranged to machine material off the inner surface of the pipe to cut the pipe while the spindle is being rotated.

Abstract: The grinding device is for removing pipe renovation material from a pipe. The grinding device has at least one cutter, a body and fastening means for fastening the grinding device to a rotation shaft. The body and the at least one cutter are accomplished of a single piece for grinding pipe renovation material both in the forward direction of the grinding device and in a direction transverse to the forward direction. In addition, a system for removing pipe renovation material from the pipe and use of the grinding device for removing pipe renovation material from the pipe are disclosed.

Abstract: A method for preparing a resizing sleeve for lining a joining point in a pipe assembly having pipes of thicker and thinner diameter. The method includes stretching the resizing sleeve in diameter to the size of the thicker pipe in diameter of the pipe assembly, installing an installation hat according to the thicker pipe in diameter of the pipe assembly by airtightly gluing it onto the stretched resizing sleeve, and returning the resizing sleeve to the size of the thinner pipe in diameter of the pipe assembly to be lined. A suitable tool for implementing the method is also disclosed.