Abstract: A pipe-fitting includes a plurality of pipe receiving portions, a hollow joint for connecting the plurality of pipe receiving portions to each other, a sealing member received in a sealing member-receiving groove, and a plurality of hollow fixing-caps, wherein each fixing-cap is screwed to a distal end of each pipe receiving portion to press the sealing member to be brought into close contact with each pipe. A fixing-cap stopper is formed on an outer circumferential face of each pipe receiving portion. The fixing-cap stopper includes a fixing-cap fixing portion including a plurality of fixing protrusions protruding toward a proximal end of the fixing-cap. A plurality of fixing-protrusion-receiving grooves is defined in the proximal end of each fixing-cap for receiving the fixing-protrusions therein respectively.

Abstract: A one-touch pipe connection device includes a socket main body portion including a plurality of pipe fitting portions in each of which a pipe is inserted; a sealing portion that provides sealing between the socket main body portion and the pipe; and a cap portion having a through hole through which the pipe is inserted into the pipe fitting portion and configured to be coupled to the pipe fitting portion by rotation while moving towards the pipe fitting portion such that the sealing portion is pressed and deformed to closely contact the pipe.

Abstract: The present invention relates to a pipe having resistance to both flame and cold, where the pipe has good flame resistance to prevent flame or smoke from spreading through the pipe penetrating into the floor or wall in the case of a fire and also has good smoke resistance to prevent deterioration in the physical properties of the pipe even in the cold weather.

Abstract: A one-touch pipe connection device includes a socket main body portion, wherein a plurality of pipe fitting portion, in each of which a pipe to be connected is inserted, are connected to each other, a sealing portion provided between the socket main body portion and the pipe to be connected and sealing between the pipe to be connected inserted in the pipe fitting portion and the socket main body portion, and a cap portion having a through hole therein for passing the pipe to be connected inserted in the pipe fitting portion, coupled to the pipe fitting portion while moving in an insertion direction of the pipe to be connected inserted in the pipe fitting portion, and, when coupled to the pipe fitting portion, pressing the sealing portion in a direction in which the sealing portion closely contacts the pipe to be connected.

Abstract: Provided are: a rigid IPVC pipe resin composition, which exhibits excellent strength and hydrostatic pressure resistance, including a PVC resin having a K-value from 72 to 84; and a rigid IPVC pipe, which exhibits excellent strength and hydrostatic pressure resistance, manufactured by extrusion of the resin composition.

Abstract: The present invention relates to a pipe having resistance to both flame and cold, where the pipe has good flame resistance to prevent flame or smoke from spreading through the pipe penetrating into the floor or wall in the case of a fire and also has good smoke resistance to prevent deterioration in the physical properties of the pipe even in the cold weather.