Abstract: An air inversion and steam cure apparatus for installing a flexible resin impregnated cured in place liner in an existing conduit is provided. The apparatus has a low friction seal between a moving liner and the stationary apparatus gland. The gland is operated and adjusted by displaceable members that move substantially perpendicular to the liner being inverted to engage the moving liner as it passes through the gland. No part of the gland extends into the chamber so that once a pre-shaped gland is adjusted, the pressure on the moving liner is not increased. As the liner reaches the distal end, it enters a sample and porting pipe with an exhaust pipe gland and exhaust pipe and is pierced by a rigid porting tool. Steam is then introduced into the liner to cure the resin and is exhausted through an exhaust hose connected to the porting tool. After cure, steam is replaced with air to cool the liner and the ends are cut to restore service through the existing conduit.

Abstract: An air inversion and steam cure apparatus for installing a flexible resin impregnated cured in place liner in an existing conduit is provided. The apparatus has a low friction seal between a moving liner and the stationary apparatus gland. The gland is operated and adjusted by displaceable members that move substantially perpendicular to the liner being inverted to engage the moving liner as it passes through the gland. No part of the gland extends into the chamber so that once a pre-shaped gland is adjusted, the pressure on the moving liner is not increased. As the liner reaches the distal end, it enters a sample and porting pipe with an exhaust pipe gland and exhaust pipe and is pierced by a rigid porting tool. Steam is then introduced into the liner to cure the resin and is exhausted through an exhaust hose connected to the porting tool. After cure, steam is replaced with air to cool the liner and the ends are cut to restore service through the existing conduit.

Abstract: A process for porting air inflated flexible resin impregnated cured in place liner by pulling without loss of pressure is provided. A selectively openable bulkhead fitting is installed at the pull-in end. The filling may be installed in the end of a pull-in liner; on a porting sleeve or secured to an inflated pulled in or inverted liner. A port is formed through the bulkhead fitting by cutting a hole through the valve assembly. A steam fitting with an exhaust hose is coupled to the bulkhead fitting while maintaining pressure in the inflation bladder. Steam for curing the resin is then introduced into the inversion apparatus to cure the resin and is exhausted through the exhaust hose.

Abstract: A process for lining an existing pipeline or conduit with a flexible resin impregnated cured in place liner by pulling in the liner and inflating it with a reusable endless inflation bladder is provided. The liner includes a resin absorbent material in tubular form with an impermeable membrane forming an outer layer. The absorbent material is saturated with a thermoset resin and pulled into the existing conduit. A flexible inflation bladder maintained on a inflation bladder spool is everted into the collapse liner which is then forced against the interior surfaces of the existing conduit, allow to cure and the bladder removed and rewound on the spool. When the everting and curing fluid is hot water, the hot water is removed and stored for reuse as the inflation bladder is withdrawn.

Abstract: A corporation stop for use with standard tapping equipment includes a threaded stem with an enlarged, conical head for forming a blind side seal. A resilient sleeve member coaxially surrounds a narrow portion of the stem, and a flat compression ring rests coaxially above the sleeve member and has a notch formed radially in its outer edge. A standard saddle having a radially-inward tab is placed on the external sidewall of the conduit about the opening and receives the compression ring, the tab engaging the notch in the compression ring. A clamp nut is engaged with the threaded stem, forcing the compression ring against the resilient sleeve member to forcibly move the upper end of the sleeve member towards the compression ring to form an external seal between the compression ring and the external sidewall of the conduit and force the sleeve member over the enlarged, conical head of the threaded stem to form an internal seal within the lined conduit.

Abstract: A corporation stop has a threaded stem with an enlarged, conical head portion and a neck portion of reduced size coaxially surrounded by a resilient sleeve member. A flat, annular compression ring rests above the sleeve member and has at least one notch formed radially in its outer edge and has on its lower side a sleeve receiving recess of a diameter greater than that of the annular opening to receive the upper end of the sleeve member. A clamp nut is engageable with the neck portion of the threaded stem. A saddle member having at least one tab projecting radially engages the notch in the compression ring.

Abstract: A method and apparatus for porting lateral connections in a lined pipeline from the lateral side of the liner. An access hole is formed through the liner material covering the lateral connection. A cutting apparatus, such as a water cutter, is inserted through the access hole with the nozzle directed back towards the liner. Alternatively, the cutting apparatus can be fed through the lateral towards the lined opening. The inside surface of the lateral pipe is then used as a guide to aim the water jet at the precise location where the cut is desired as the nozzle is revolved around the inside surface of the lateral to cut the liner to the shape of the connection opening.