Abstract: A method and apparatus are shown for lining a tubular member with an elastomeric liner having an outside diameter which is initially greater than the inside diameter of the tubular member. A series of downsizing rollers reduce the outside diameter of the liner a preselected amount. A series of shaping rollers form the downsized liner into an ellipse, thereby allowing the downsized liner to be guided around bends and turns into the interior of the tubular member. After insertion, the liner is allowed to expand to substantially its original outside diameter to secure the liner within the tubular member.

Abstract: A method is shown for lining a host pipe with a polyolefin liner having an outside diameter which is initially greater than the inside diameter of the host pipe. A length of the liner is cryogenically cooled to a supercooled state to reduce the outside diameter of the liner and to maintain the downsized dimensions of the liner while increasing the tensile strength to facilitate insertion of the liner into the host pipe.

Abstract: A method and apparatus are shown for lining a tubular member with an elastomeric liner having an outside diameter which is initially greater than the inside diameter of the tubular member. A series of downsizing rollers reduce the outside diameter of the liner a preselected amount. A series of shaping rollers form the downsized liner into an ellipse, thereby allowing the downsized liner to be guided around bends and turns into the interior of the tubular member. After insertion, the liner is allowed to expand to substantially its original outside diameter to secure the liner within the tubular member.

Abstract: A method and apparatus are shown for lining a host pipe with an elastomeric liner having an outside diameter which is initially greater than the inside diameter of the host pipe. A length of the liner is reduced to a downsized outside diameter and the downsized liner is cryogenically cooled to a supercooled state to maintain the downsized dimensions of the liner while increasing the tensile strength to facilitate insertion of the liner into the host pipe.

Abstract: A corporate stop is shown for sealing an opening in the sidewall of a host pipe. The stop has a threaded stem with an enlarged head portion and a neck portion of reduced size. A flexible sleeve member is received about the neck portion of the stem and has an upper end and a lower end which accommodates the enlarged head portion of the stem. A compression washer has an upper side and a lower side which fits about the sidewall of the conduit. The washer also has an opening which is alignable with an opening provided in the sidewall of the conduit. The lower side of the washer has a recess for receiving the upper end of the sleeve member when the stop is installed on the conduit performing an external seal with respect to the conduit. A clamp nut is engageable with the neck portion of the threaded stem for forcibly moving the lower end of the sleeve member over the head portion of the stem to expand the lower end of the sleeve member and form an internal seal with an opening in the conduit.

Abstract: A method and apparatus for lining a host pipe with an elastomeric liner having an outside diameter which is initially greater than the inside diameter of the host pipe. A length of the liner is reduced to a downsized outside diameter and the downsized liner is cryogenically cooled to a supercooled state to maintain the downsized dimensions of the liner while increasing the tensile strength to facilitate insertion of the liner into the host pipe.

Abstract: A method and apparatus are shown for lining a tubular member with an elastomeric liner having an outside diameter which is initially greater than the inside diameter of the tubular member and a length which is greater than the length of the tubular member. A length of the liner is reduced to a downsized outside diameter and inserted into the tubular member to be lined. The liner is allowed to expand to substantially its original outside diameter to thereby bond the liner within the tubular member, the liner opposite ends still extending outwardly from the opposing ends of the tubular member. The outside diameter of the liner opposite ends is then increased to approximately the outside diameter of the tubular member by heating and reforming that portion of the liner opposite ends which extends outwardly from the opposing ends of the tubular member.

Abstract: A method and apparatus are shown for lining a tubular member with an elastomeric liner having an outside diameter which is initially greater than the inside diameter of the tubular member. A length of the liner is reduced to a downsized outside diameter by rolling and simultaneously crushing the liner a preselected amount, whereby the liner retains a standard dimensional ratio in the downsized condition. The liner is inserted into the tubular member to be lined and is allowed to expand to substantially its original outside diameter to thereby bond the liner within the tubular member.